diff --git a/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.i18n.yaml b/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.i18n.yaml
index a3a24e6518..04a7ebf4ba 100644
--- a/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.i18n.yaml
+++ b/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md
-2026-06-19-acp-snapshot-tests.md: bee59901eed7bb068dc93699aa2bb5e55216b8ff
-2026-06-19-acp-snapshot-tests.zh.md: 2c34408d97e017e44feccbbf64fe5a15e6e172b7
+2026-06-19-acp-snapshot-tests.md: cd9a4903b1eaaf624166d23c25789d66b68a6e02
+2026-06-19-acp-snapshot-tests.zh.md: 3a58b872a1b2123b2cd66334832af3effc4286f7
diff --git a/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md b/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md
index bee59901ee..cd9a4903b1 100644
--- a/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md
+++ b/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md
@@ -12,9 +12,9 @@ The blocker for a full-transcript test is the model: the agent's output is drive
 
 ## Decision
 
-A snapshot test boots the real ACP example, drives its stdio protocol from a deterministic script, and compares normalized output with committed expected outputs. A session log recorded once from the real API supplies all later model streams. The fixture is the product's ordinary persisted JSONL.
+A snapshot test boots the real ACP example, drives its stdio protocol from a deterministic script, and compares normalized output with committed expected outputs. A session log recorded once from the real API supplies all later model streams. The fixture is a [projection of the product's persisted JSONL](2026-08-18-session-snapshot-envelope-projection.md): its header and payloads remain, while body sequence/time envelopes are omitted.
 
-### The fixture is the persisted session JSONL
+### The fixture projects the persisted session JSONL
 
 Each scenario's `session.jsonl` is harvested from a real run. `assistant/chunk` events reproduce the model streams; tool, message, and boundary events capture the harness behavior. One ordinary session artifact therefore serves as both replay source and behavioral expected output.
 
@@ -42,7 +42,7 @@ Replay is positional and therefore permits only one in-flight model stream per s
 
 ### Recording harvests the log; keyless replay needs a providerless config
 
-Recording runs the scenario with the real `llm-deepseek` adapter and the JSONL persistence backend configured with `persistenceCompression: 'none'`, then copies the produced `.jsonl` into the scenario dir. The explicit raw mode keeps committed replay fixtures line-readable while ordinary deployments use the backend's compressed default; eligible chunk runs still use the default packed storage rows. Per-event appends are durable, but the harness shuts the subprocess down gracefully (close stdin → `await ctx.dispose()`) before harvesting so the final events are flushed. `llm-replay` itself does no recording — it is replay-only.
+Recording runs the scenario with the real `llm-deepseek` adapter and the JSONL persistence backend configured with `persistenceCompression: 'none'`, then projects the produced `.jsonl` into the scenario dir. The explicit raw mode keeps harvested logs line-readable while ordinary deployments use the backend's compressed default; eligible chunk runs still use the default packed storage rows. Per-event appends are durable, but the harness shuts the subprocess down gracefully (close stdin → `await ctx.dispose()`) before harvesting so the final events are flushed. `llm-replay` itself does no recording — it is replay-only.
 
 Replay uses a `cordis.snapshot.yml` overlay that replaces the real adapter with `llm-replay` while retaining the live composition. Recording uses the ordinary config and a harness-supplied persistence root. Replay mode skips `.env` loading, so a stray API key cannot trigger a live call. See the [single-source config Agent Note](../../archived/testing/2026-07-04-single-source-acp-replay-config.md).
 
@@ -55,7 +55,7 @@ A snapshot run asserts **two** normalized outputs, because the harness's externa
 
 The surfaces are complementary: stdout covers the minimal automation wire, while JSONL covers loop, tool, and boundary structure that the wire intentionally omits.
 
-Normalization replaces session, cwd, protocol-id, timestamp, path, and process volatility while preserving deterministic sequence numbers. Record and refresh also store a generated workspace and its filesystem-resolved aliases as `{{cwd}}` in the replay fixture, so platform temp roots and random basenames do not affect recordings; authored temp paths and cwd values under an explicit `workspaceParent` remain literal. Scenarios constrain real bash use to stable commands. The stdout expected output remains wire-shaped JSONL and every raw line must parse as JSON. Ordinary Vitest snapshot updates write only the stdout expected output; the explicit `record` and `refresh` modes own replay-fixture writes.
+Normalization replaces session, cwd, protocol-id, timestamp, path, and process volatility; fixture projection omits body sequence/time envelopes without changing payload references. Record and refresh also store a generated workspace and its filesystem-resolved aliases as `{{cwd}}` in the replay fixture, so platform temp roots and random basenames do not affect recordings; authored temp paths and cwd values under an explicit `workspaceParent` remain literal. Scenarios constrain real bash use to stable commands. The stdout expected output remains wire-shaped JSONL and every raw line must parse as JSON. Ordinary Vitest snapshot updates write only the stdout expected output; the explicit `record` and `refresh` modes own replay-fixture writes.
 
 ### Isolation: normalization now, sandbox later
 
@@ -67,7 +67,7 @@ Tool determinism comes from a generated cwd, scrubbed environment, fresh non-log
 
 ### Two subcommands, replay in the default gate
 
-`pnpm run test:snapshot` replays committed fixtures keylessly; `test:snapshot:record` uses the real API and rewrites the harvested session log and stdout expected output. The same keyless gate discovers repository JSONL by its `session` header and rejects any fixture that differs from the shared codec's canonical packed representation. Missing fixtures fail loud. Every scenario carries `input.json`, `stdout.expected.jsonl`, and `session.jsonl`; no-model cases use a header-only log. `replay.override.json` is required only for scenarios marked `overridden`, because its presence replaces derived replay. Fixture guards reject missing, mismatched, and orphaned files. Both commands accept scenario filters.
+`pnpm run test:snapshot` replays committed fixtures keylessly; `test:snapshot:record` uses the real API and rewrites the projected session snapshot and stdout expected output. The same keyless gate discovers repository JSONL by its `session` header and rejects any fixture that differs from the shared codec's projected canonical packed representation. Missing fixtures fail loud. Every scenario carries `input.json`, `stdout.expected.jsonl`, and `session.jsonl`; no-model cases use a header-only log. `replay.override.json` is required only for scenarios marked `overridden`, because its presence replaces derived replay. Fixture guards reject missing, mismatched, and orphaned files. Both commands accept scenario filters.
 
 ## Alternatives considered
 
diff --git a/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.zh.md b/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.zh.md
index 2c34408d97..3a58b872a1 100644
--- a/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.zh.md
+++ b/.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.zh.md
@@ -12,9 +12,9 @@ Status: implemented
 
 ## 决策
 
-快照测试会启动真实 ACP 示例，通过确定性脚本驱动其 stdio 协议，并将规范化输出与已提交的预期输出比较。从真实 API 一次记录的会话日志为后续所有模型流提供数据。fixture 就是产品普通的持久化 JSONL。
+快照测试会启动真实 ACP 示例，通过确定性脚本驱动其 stdio 协议，并将规范化输出与已提交的预期输出比较。从真实 API 一次记录的会话日志为后续所有模型流提供数据。fixture 是[产品持久化 JSONL 的投影](2026-08-18-session-snapshot-envelope-projection.md)：保留 header 与 payload，省略正文序号／时间 envelope。
 
-### fixture 即持久化的会话 JSONL
+### fixture 投影持久化会话 JSONL
 
 每个场景的 `session.jsonl` 都从真实运行中采集。`assistant/chunk` 事件复现模型流；工具、消息和边界事件捕获 harness 行为。因此，一份普通会话产物同时充当回放来源和行为预期输出。
 
@@ -42,7 +42,7 @@ Status: implemented
 
 ### 录制采集日志；无密钥回放需要无提供方的配置
 
-记录模式使用真实 `llm-deepseek` 适配器和配置为 `persistenceCompression: 'none'` 的 JSONL 持久化后端运行场景，再把生成的 `.jsonl` 复制到场景目录。显式 raw 模式让已提交回放 fixture 保持逐行可读，而普通部署使用后端的压缩默认值；符合条件的分片连续段仍使用默认的打包存储行。逐事件追加具有持久性，但 harness 会在采集前优雅关闭子进程（关闭 stdin → `await ctx.dispose()`），以确保最终事件已刷出。`llm-replay` 本身不执行记录——它只负责回放。
+记录模式使用真实 `llm-deepseek` 适配器和配置为 `persistenceCompression: 'none'` 的 JSONL 持久化后端运行场景，再把生成的 `.jsonl` 投影到场景目录。显式 raw 模式让采集日志保持逐行可读，而普通部署使用后端的压缩默认值；符合条件的分片连续段仍使用默认的打包存储行。逐事件追加具有持久性，但 harness 会在采集前优雅关闭子进程（关闭 stdin → `await ctx.dispose()`），以确保最终事件已刷出。`llm-replay` 本身不执行记录——它只负责回放。
 
 回放使用 `cordis.snapshot.yml` overlay，以 `llm-replay` 替换真实适配器，同时保留实际组合。记录使用普通配置和由 harness 提供的持久化根目录。回放模式跳过 `.env` 加载，因此意外存在的 API 密钥不会触发真实调用。参见[单一来源配置 Agent Note](../../archived/testing/2026-07-04-single-source-acp-replay-config.md)。
 
@@ -55,7 +55,7 @@ Status: implemented
 
 两个表面互补：stdout 覆盖精简的自动化协议格式，JSONL 覆盖协议格式有意省略的循环、工具和边界结构。
 
-规范化会替换会话、cwd、协议 id、时间戳、路径和进程易变值，同时保留确定性序号。录制与刷新还会在回放 fixture 中将生成的 workspace 及其文件系统解析出的别名存储为 `{{cwd}}`，使平台临时根目录和随机 basename 不影响录制结果；手工编写的临时路径与显式 `workspaceParent` 下的 cwd 值仍保留字面值。场景把真实 bash 使用限制在稳定命令上。stdout 预期输出仍是符合协议格式的 JSONL，每个原始行都必须可解析为 JSON。普通 Vitest 快照更新只写入 stdout 预期输出；回放 fixture 的写入由显式 `record` 和 `refresh` 模式负责。
+规范化会替换会话、cwd、协议 id、时间戳、路径和进程易变值；fixture 投影会省略正文序号／时间 envelope，而不修改 payload 引用。录制与刷新还会在回放 fixture 中将生成的 workspace 及其文件系统解析出的别名存储为 `{{cwd}}`，使平台临时根目录和随机 basename 不影响录制结果；手工编写的临时路径与显式 `workspaceParent` 下的 cwd 值仍保留字面值。场景把真实 bash 使用限制在稳定命令上。stdout 预期输出仍是符合协议格式的 JSONL，每个原始行都必须可解析为 JSON。普通 Vitest 快照更新只写入 stdout 预期输出；回放 fixture 的写入由显式 `record` 和 `refresh` 模式负责。
 
 ### 隔离：当前靠归一化，后续可加沙箱
 
@@ -67,7 +67,7 @@ Status: implemented
 
 ### 两个子命令，回放在默认门禁中
 
-`pnpm run test:snapshot` 无需密钥即可回放已提交 fixture；`test:snapshot:record` 使用真实 API，并重写采集的会话日志与 stdout 预期输出。同一无密钥门禁会通过 `session` 头记录发现仓库中的 JSONL，并拒绝与共享编解码器的规范打包表示不同的任何 fixture。缺少 fixture 时会明确报错。每个场景都包含 `input.json`、`stdout.expected.jsonl` 和 `session.jsonl`；不调用模型的情况使用仅含头记录的日志。只有标记为 `overridden` 的场景才需要 `replay.override.json`，因为它一旦存在就会取代派生回放。fixture 守卫会拒绝缺失、不匹配和孤立文件。两个命令都接受场景过滤器。
+`pnpm run test:snapshot` 无需密钥即可回放已提交 fixture；`test:snapshot:record` 使用真实 API，并重写投影后的会话快照与 stdout 预期输出。同一无密钥门禁会通过 `session` 头记录发现仓库中的 JSONL，并拒绝与共享编解码器的投影后规范打包表示不同的任何 fixture。缺少 fixture 时会明确报错。每个场景都包含 `input.json`、`stdout.expected.jsonl` 和 `session.jsonl`；不调用模型的情况使用仅含头记录的日志。只有标记为 `overridden` 的场景才需要 `replay.override.json`，因为它一旦存在就会取代派生回放。fixture 守卫会拒绝缺失、不匹配和孤立文件。两个命令都接受场景过滤器。
 
 ## 曾考虑的替代方案
 
diff --git a/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.i18n.yaml b/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.i18n.yaml
new file mode 100644
index 0000000000..3ec2d775f8
--- /dev/null
+++ b/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.i18n.yaml
@@ -0,0 +1,6 @@
+# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
+# side as of the last confirmed-consistent state. Both languages carry equal authority;
+# after editing either side, bring the other along and re-record with:
+#   pnpm run verify-translation-pairing --write .agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.md
+2026-08-18-session-snapshot-envelope-projection.md: abb7496a14b52a76d7f6057933c54c20e76fa0cd
+2026-08-18-session-snapshot-envelope-projection.zh.md: cbc095f98aa06c1da679a27b820c1b756eda1060
diff --git a/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.md b/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.md
new file mode 100644
index 0000000000..abb7496a14
--- /dev/null
+++ b/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.md
@@ -0,0 +1,33 @@
+# Agent Note: Session snapshot envelope projection
+
+Status: implemented
+
+English | [中文](2026-08-18-session-snapshot-envelope-projection.zh.md)
+
+## Problem
+
+Committed session snapshots copied the persistence envelope on every body row. The monotonic `seq` and wall-clock `time` fields, or `seq0` and `time0` on packed rows, made a local event insertion renumber or retime a large suffix even when its payloads were unchanged. These fields are required by the durable runtime log, but their repetition made reviewed snapshot diffs describe storage mechanics instead of changed behavior.
+
+## Decision
+
+A committed session snapshot is a projection of the persisted JSONL. Its first `session` header remains unchanged, including `version` and `createdAt`. Every body record retains its discriminant, payload, and other top-level fields, while the projection omits `seq`, `time`, `seq0`, and `time0` when present. Nested fields with the same names are payload and remain unchanged.
+
+Snapshot serialization omits those keys from the parsed body object before writing the line. A persisted-JSONL input is parsed once at the snapshot boundary; the dedicated snapshot normalizer combines value normalization, request-header scrubbing, and projection in that object pass rather than serializing and parsing again. Generic log and stream normalization retains sequence envelopes. Runtime persistence is unchanged.
+
+Replay parses the projected fixture and assigns contiguous synthetic sequence numbers in memory. Synthetic event times start at zero; packed `data.dt` values retain the relative gaps already stored in the fixture. The repository fixture-layout gate decodes this projected form, retains canonical packed rows, and rejects a half-present persistence envelope.
+
+## Alternatives considered
+
+**Change runtime persistence to omit the fields.** Rejected because durable session validation, ordering, and event relationships rely on complete sequence and time envelopes. The instability belongs to the reviewed test representation, not the runtime format.
+
+**Keep the fields and normalize them to zero or positional numbers.** Rejected because every body row would still carry non-behavioral noise, and positional values would still churn after insertions.
+
+**Replace numeric payload references with semantic snapshot identifiers.** Rejected for this change because it would alter event payloads and require event-type-specific projection rules. Payload references remain exactly as recorded; the ordinary contiguous runtime sequence lets replay reconstruct the omitted envelope.
+
+**Introduce a second replay file.** Rejected because the projected session snapshot already retains every payload needed to derive model streams and compare re-persisted behavior. A second fixture would duplicate the transcript and create synchronization work.
+
+## Consequences
+
+Adding, removing, or moving an event no longer rewrites the envelope of every later snapshot row. Snapshot diffs continue to show header changes and all payload changes, including numeric sequence references inside `data`.
+
+The checked-in file is no longer byte-for-byte valid persistence JSONL. Consumers must use the shared snapshot decoder instead of passing body rows directly to the storage decoder. The synthetic time anchor is not historical wall-clock data; only retained packed gaps carry relative timing. Repository migration and write-back paths enforce the projection so a later recording cannot reintroduce the omitted fields.
diff --git a/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.zh.md b/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.zh.md
new file mode 100644
index 0000000000..cbc095f98a
--- /dev/null
+++ b/.agents/notes/implemented/testing/2026-08-18-session-snapshot-envelope-projection.zh.md
@@ -0,0 +1,33 @@
+# Agent Note：会话快照 envelope 投影
+
+Status: implemented
+
+[English](2026-08-18-session-snapshot-envelope-projection.md) | 中文
+
+## 问题
+
+签入仓库的会话快照曾复制每一条正文记录的持久化 envelope。普通行的单调 `seq` 与墙钟 `time`，以及打包行的 `seq0` 与 `time0`，会让一次局部事件插入重新编号或计时后面的大段内容，即使其 payload 完全没有变化。这些字段是运行时持久日志所必需的，但在快照中反复出现会让评审 diff 主要描述存储机制，而不是行为变化。
+
+## 决策
+
+签入仓库的会话快照是持久化 JSONL 的投影。第一条 `session` header 保持不变，包括 `version` 与 `createdAt`。每条正文记录保留判别字段、payload 和其他顶层字段；投影仅在相应字段存在时省略 `seq`、`time`、`seq0` 与 `time0`。嵌套在 payload 中的同名字段保持不变。
+
+快照序列化会在写入每行前从已解析的正文对象上省略这些键。以持久化 JSONL 为输入的入口只在快照边界解析一次；专用快照 normalizer 在同一轮对象操作中完成值规范化、request header 清理和投影，而不会先序列化再重新解析。通用日志和 stream 规范化会保留序号 envelope。运行时持久化不变。
+
+回放解析投影后的 fixture，并在内存中分配连续的 synthetic 序号。synthetic 事件时间从零开始；打包行的 `data.dt` 保留 fixture 中已有的相对间隔。仓库 fixture 布局门禁会解码这种投影格式，继续强制规范打包行，并拒绝只保留一半的持久化 envelope。
+
+## 曾考虑的替代方案
+
+**让运行时持久化省略这些字段。** 拒绝，因为持久会话校验、排序和事件关系依赖完整的序号／时间 envelope。不稳定性属于供评审的测试表示，而不是运行时格式。
+
+**保留字段并将其归一化为零或位置序号。** 拒绝，因为每条正文记录仍会携带非行为噪声，位置值在插入事件后仍会大面积变化。
+
+**把 payload 中的数字引用替换成语义化快照标识。** 本次变更拒绝，因为这会修改事件 payload，并要求按事件类型编写投影规则。payload 引用严格保留录制值；普通、连续的运行时序号足以让回放重建被省略的 envelope。
+
+**新增第二份 replay 文件。** 拒绝，因为投影后的会话快照仍保留派生模型流和比较重新持久化行为所需的全部 payload。第二份 fixture 会重复 transcript，并引入同步成本。
+
+## 后果
+
+新增、删除或移动事件时，不再重写后续每一条快照记录的 envelope。快照 diff 仍会展示 header 变化和全部 payload 变化，包括 `data` 内的数字序号引用。
+
+签入仓库的文件不再是逐字节有效的持久化 JSONL。消费方必须使用共享快照 decoder，而不能把正文行直接交给 storage decoder。synthetic 时间锚点不是历史墙钟数据；只有保留的打包间隔表示相对时间。仓库迁移与回写路径强制执行该投影，因此后续录制不会重新引入被省略的字段。
diff --git a/apps/web/tests/scaffold.ts b/apps/web/tests/scaffold.ts
index f1ba62d881..a5ba4e71e4 100644
--- a/apps/web/tests/scaffold.ts
+++ b/apps/web/tests/scaffold.ts
@@ -33,7 +33,11 @@ import { Context } from '@deepseek-ai/cordis'
 import Loader from '@deepseek-ai/cordis-plugin-loader'
 import Include, { type PatchOptions } from '@deepseek-ai/cordis-plugin-include'
 import Group from '@deepseek-ai/cordis-plugin-group'
-import { scrubRequestHeaders, stabilizeFixtureMessageIds } from '@deepseek-ai/dsh-acp-snapshot'
+import {
+  scrubRequestHeaders,
+  scrubSessionSnapshot,
+  stabilizeFixtureMessageIds,
+} from '@deepseek-ai/dsh-acp-snapshot'
 import {
   assertEntriesLoaded,
   composeEntries,
@@ -651,7 +655,7 @@ function rawSessionLog(session: Session): string {
 export async function recordFixture(scaffold: WebScaffold, sessionId: SessionId, fixturePath: string): Promise<void> {
   const agent = scaffold.ctx.agents.get(sessionId)
   if (agent === undefined) throw new Error(`record harvest: no live agent for ${sessionId}`)
-  const fresh = scrubRequestHeaders(rawSessionLog(agent.session))
+  const fresh = scrubSessionSnapshot(rawSessionLog(agent.session))
     .split(sessionId).join('{{sessionId}}')
     .split(scaffold.workspaceCwd).join('{{cwd}}')
     .replace(/"rpcId":"[^"]+"/g, '"rpcId":"{{rpcId}}"')
diff --git a/apps/web/tests/snapshots/approval-composer/session.jsonl b/apps/web/tests/snapshots/approval-composer/session.jsonl
index b072da5fc4..bd1036e539 100644
--- a/apps/web/tests/snapshots/approval-composer/session.jsonl
+++ b/apps/web/tests/snapshots/approval-composer/session.jsonl
@@ -1,64 +1,64 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1785403668101,"cwd":"{{cwd}}/workspace"}
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-{"type":"permission/preset","seq":1,"time":1785403668197,"data":{"preset":"read-only"}}
-{"type":"sandbox/mode","seq":2,"time":1785403668197,"data":{"mode":"read-only"}}
-{"type":"approval/policy","seq":3,"time":1785403668198,"data":{"policy":"ask"}}
-{"type":"command/done","seq":4,"time":1785403668198,"data":{"commandId":"cmd-0ab130cc-1","kind":"success","text":"Permission preset: read-only."}}
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-{"type":"step/start","seq":8,"time":1785403668214,"data":{"turn":1,"step":1}}
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Let me do this with a single bash command using echo."},{"type":"tool-call","id":"call_00_RFz12ulKTflJvhrwgkQX7978","name":"bash","arguments":"{\"command\": \"echo 'tok63z tokc7y tokibx tokofw tokujv tok10nu tok16rt tok1cvs tok1izr tok1p3q tok1v7p tok21bo tok2a4 tok8e3 tokei2 tokkm1 tokqq0 tokwtz tok12xy tok191x tok1f5w tok1l9v tok1rdu tok1xht tok23ls tok4k8 tokao7 tokgs6 tokmw5 tokt04 tokz43 tok1582 tok1bc1 tok1hg0 tok1njz tok1tny tok1zrx tokqd tok6uc tokcyb tokj2a tokp69 tokva8 tok11e7 tok17i6 tok1dm5 tok1jq4 tok1pu3 tok1vy2 tok2221 tok30h tok94g tokf8f toklce tokrgd tokxkc tok13ob tok19sa tok1fw9 tok1m08 tok1s47 tok1y86 tok24c5 tok5al tokbek tokhij toknmi toktqh tokzug tok15yf tok1c2e tok1i6d tok1oac tok1ueb tok20ia tok1gq tok7kp tokdoo tokjsn tokpwm tokw0l tok124k tok188j tok1eci tok1kgh tok1qkg tok1wof tok22se tok3qu tok9ut tokfys tokm2r toks6q tokyap tok14eo tok1ain tok1gmm tok1mql tok1suk tok1yyj tok252i tok60y tokc4x toki8w tokocv tokugu tok10kt tok16os tok1csr tok1iwq tok1p0p tok1v4o tok218n tok273 tok8b2 tokef1 tokkj0 tokqmz tokwqy tok12ux tok18yw tok1f2v tok1l6u tok1rat tok1xes tok23ir tok4h7 tokal6 tokgp5 tokmt4 toksx3 tokz12 tok1551 tok1b90 tok1hcz tok1ngy tok1tkx tok1zow toknc tok6rb tokcva tokiz9 tokp38 tokv77 tok11b6 tok17f5 tok1dj4 tok1jn3 tok1pr2 tok1vv1 tok21z0 tok2xg tok91f tokf5e tokl9d tokrdc tokxhb tok13la tok19p9 tok1ft8 tok1lx7 tok1s16 tok1y55 tok2494 tok57k tokbbj tokhfi toknjh tokktng tokzrf tok15ve tok1bzd tok1i3c tok1o7b tok1uba tok20f9 tok1dp tok7ho tokdln tokjpm tokptl tokvxk tok121j tok185i tok1e9h tok1kdg tok1qhf tok1wle tok22pd tok3nt tok9rs tokfvr toklzq toks3p toky7o tok14bn tok1afm tok1gjl tok1mnk tok1srj tok1yvi tok24zh tok5xx tokc1w toki5v toko9u tokudt tok10hs tok16lr tok1cpq tok1itp tok1oxo tok1v1n tok215m tok242 tok881 tokec0 tokfz tokqjy tokwnx' > notes.txt\", \"description\": \"Write notes.txt with the specified 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tok14eo tok1ain tok1gmm tok1mql tok1suk tok1yyj tok252i tok60y tokc4x toki8w tokocv tokugu tok10kt tok16os tok1csr tok1iwq tok1p0p tok1v4o tok218n tok273 tok8b2 tokef1 tokkj0 tokqmz tokwqy tok12ux tok18yw tok1f2v tok1l6u tok1rat tok1xes tok23ir tok4h7 tokal6 tokgp5 tokmt4 toksx3 tokz12 tok1551 tok1b90 tok1hcz tok1ngy tok1tkx tok1zow toknc tok6rb tokcva tokiz9 tokp38 tokv77 tok11b6 tok17f5 tok1dj4 tok1jn3 tok1pr2 tok1vv1 tok21z0 tok2xg tok91f tokf5e tokl9d tokrdc tokxhb tok13la tok19p9 tok1ft8 tok1lx7 tok1s16 tok1y55 tok2494 tok57k tokbbj tokhfi toknjh tokktng tokzrf tok15ve tok1bzd tok1i3c tok1o7b tok1uba tok20f9 tok1dp tok7ho tokdln tokjpm tokptl tokvxk tok121j tok185i tok1e9h tok1kdg tok1qhf tok1wle tok22pd tok3nt tok9rs tokfvr toklzq toks3p toky7o tok14bn tok1afm tok1gjl tok1mnk tok1srj tok1yvi tok24zh tok5xx tokc1w toki5v toko9u tokudt tok10hs tok16lr tok1cpq tok1itp tok1oxo tok1v1n tok215m tok242 tok881 tokec0 tokfz tokqjy tokwnx' > notes.txt\", \"sandbox_permissions\": 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diff --git a/apps/web/tests/snapshots/code-mode-round/session.jsonl b/apps/web/tests/snapshots/code-mode-round/session.jsonl
index 09e2432e94..b3f29fb39e 100644
--- a/apps/web/tests/snapshots/code-mode-round/session.jsonl
+++ b/apps/web/tests/snapshots/code-mode-round/session.jsonl
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+{"type":"tool/code-dispatch-start","data":{"rootCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765","parentCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765","subCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765:code:1","name":"bash","arguments":{"command":"echo CODE_ROUND_OK","description":"Echo CODE_ROUND_OK"}}}
+{"type":"tool/code-dispatch","data":{"rootCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765","parentCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765","subCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765:code:1","name":"bash","arguments":{"command":"echo CODE_ROUND_OK","description":"Echo CODE_ROUND_OK"},"isError":false,"content":[{"type":"text","text":"CODE_ROUND_OK\n"}]}}
+{"type":"tool/code-dispatch-start","data":{"rootCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765","parentCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765","subCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765:code:2","name":"read","arguments":{"file_path":"missing.txt"}}}
+{"type":"tool/code-dispatch","data":{"rootCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765","parentCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765","subCallId":"call_00_6VNoF1gDSerTBKoCfYSH3765:code:2","name":"read","arguments":{"file_path":"missing.txt"},"isError":true,"content":[{"type":"text","text":"Error: cannot read \"{{cwd}}/workspace/missing.txt\": not found"}]}}
+{"type":"tool/result","data":{"turn":1,"step":1,"callId":"call_00_6VNoF1gDSerTBKoCfYSH3765","content":[{"type":"text","text":"{\n  \"bash\": \"CODE_ROUND_OK\",\n  \"readError\": {\n    \"toolName\": \"read\",\n    \"message\": \"cannot read \\\"{{cwd}}/workspace/missing.txt\\\": not found\"\n  }\n}"}],"isError":false},"sourceEventSeqs":[206],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":2,"index":0,"dt":[106,27,1,0,0,23,1,29,0,1,25,1,22],"texts":["The"," program"," ran"," successfully","."," Let"," me"," now"," reply"," D","ONE"," as"," instructed","."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":1,"text":"D"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":1,"text":"ONE"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The program ran successfully. Let me now reply DONE as instructed."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":196,"outputTokens":17,"cacheReadTokens":8576,"reasoningTokens":14}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"content":[{"type":"reasoning","text":"The program ran successfully. Let me now reply DONE as instructed."},{"type":"text","text":"DONE"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":196,"outputTokens":17,"cacheReadTokens":8576,"reasoningTokens":14}},"sourceEventSeqs":[214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/apps/web/tests/snapshots/cordis-tool-round/session.jsonl b/apps/web/tests/snapshots/cordis-tool-round/session.jsonl
index 8d73f3fcec..a715af06f5 100644
--- a/apps/web/tests/snapshots/cordis-tool-round/session.jsonl
+++ b/apps/web/tests/snapshots/cordis-tool-round/session.jsonl
@@ -1,61 +1,61 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1785157562825,"cwd":"{{cwd}}/workspace"}
-{"type":"turn/start","seq":0,"time":1785157562881,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
-{"type":"user/message","seq":1,"time":1785157562882,"data":{"content":[{"type":"text","text":"Use only Cordis tools. First call cordis_inspect_self with no arguments. Then call cordis_define with plugin kind \"new\", idPrefix \"snap\", name \"snapshot noop\", purpose \"does nothing, for the snapshot\", code.host exactly \"return { name: \\\"snapshot-noop\\\", apply(ctx) {} }\" and code.client exactly \"return { inject: [\\\"slots\\\"], apply(ctx) { ctx.slots.register({ name: \\\"shell.overlay\\\", id: \\\"snapshot-probe\\\" }, () => React.createElement(\\\"div\\\", { \\\"data-snapshot-probe\\\": \\\"loaded\\\" })) } }\". Read its returned pluginId and packageId, then call cordis_run with those exact IDs and mode \"run\". After the run request returns, reply exactly CORDIS_UI_READY and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
-{"type":"session/title","seq":2,"time":1785157562883,"data":{"title":"Use only Cordis tools. First","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":3,"time":1785157562937,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":4,"time":1785157562938,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash","reasoningEffort":"high"},"system":"{{system}}","tools":"{{tools}}","messagePrefix":["{{messagePrefix}}"]},"reason":"initial"}}
-{"type":"assistant/chunk","seq":5,"time":1785157564667,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"assistant/chunk","seq":87,"time":1785157565360,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":99,"time":1785157565490,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"I will inspect the current Session's dynamic Cordis Plugins before defining the snapshot Package."}}}}
-{"type":"assistant/chunk","seq":100,"time":1785157565491,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"cordis-inspect-self","name":"cordis_inspect_self","arguments":"{}"}}}}
-{"type":"assistant/chunk","seq":101,"time":1785157565491,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":15137,"outputTokens":128,"cacheReadTokens":1280,"reasoningTokens":81}}}}
-{"type":"assistant/chunk","seq":102,"time":1785157565491,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":103,"time":1785157565495,"data":{"turn":1,"step":1,"content":[{"type":"reasoning","text":"The user wants me to:\n1. Call `cordis_inspect` with `what: \"temporary\"`\n2. Call `cordis_mount` with the exact code provided\n3. Read the returned id and call `cordis_unmount` with that exact id\n4. Reply exactly \"CORDIS_UI_DONE\" and stop\n\nLet me start with step 1."},{"type":"tool-call","id":"call_00_KZk918WtlKan9pHMULIT8794","name":"cordis_inspect","arguments":"{\"what\": \"temporary\"}"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":15137,"outputTokens":128,"cacheReadTokens":1280,"reasoningTokens":81}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102],"surfaceOp":"append"}
-{"type":"tool/call","seq":104,"time":1785157565496,"data":{"turn":1,"step":1,"callId":"call_00_KZk918WtlKan9pHMULIT8794","name":"cordis_inspect","arguments":"{\"what\": \"temporary\"}"}}
-{"type":"tool/result","seq":105,"time":1785157565500,"data":{"turn":1,"step":1,"callId":"call_00_KZk918WtlKan9pHMULIT8794","content":[{"type":"text","text":"## Temporary Plugins\nNo temporary Plugins are running. Temporary Plugins created with cordis_mount disappear when DSH restarts."}],"isError":false},"sourceEventSeqs":[104],"surfaceOp":"append"}
-{"type":"step/end","seq":106,"time":1785157565503,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":107,"time":1785157565503,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":108,"time":1785157566524,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"assistant/chunk","seq":131,"time":1785157566845,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":156,"time":1785157567041,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"No dynamic Plugins are present, so I will define the requested Host and Client Package."}}}}
-{"type":"assistant/chunk","seq":157,"time":1785157567041,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"cordis-define","name":"cordis_define","arguments":"{\"plugin\":{\"kind\":\"new\",\"idPrefix\":\"snap\"},\"name\":\"snapshot noop\",\"purpose\":\"does nothing, for the snapshot\",\"code\":{\"host\":\"return { name: \\\"snapshot-noop\\\", apply(ctx) {} }\",\"client\":\"return { inject: [\\\"slots\\\"], apply(ctx) { ctx.slots.register({ name: \\\"shell.overlay\\\", id: \\\"snapshot-probe\\\" }, () => React.createElement(\\\"div\\\", { \\\"data-snapshot-probe\\\": \\\"loaded\\\" })) } }\"}}"}}}}
-{"type":"assistant/chunk","seq":158,"time":1785157567042,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":72,"outputTokens":82,"cacheReadTokens":16512,"reasoningTokens":22}}}}
-{"type":"assistant/chunk","seq":159,"time":1785157567042,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":160,"time":1785157567043,"data":{"turn":1,"step":2,"content":[{"type":"reasoning","text":"Good, no temporary plugins running. Now step 2: call cordis_mount with the exact code."},{"type":"tool-call","id":"call_00_OyrlxqqpnvzTe11sN5Oy2361","name":"cordis_mount","arguments":"{\"code\": \"return { name: \\\"snapshot-noop\\\", apply(ctx) {} }\"}"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":72,"outputTokens":82,"cacheReadTokens":16512,"reasoningTokens":22}},"sourceEventSeqs":[108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159],"surfaceOp":"append"}
-{"type":"tool/call","seq":161,"time":1785157567043,"data":{"turn":1,"step":2,"callId":"call_00_OyrlxqqpnvzTe11sN5Oy2361","name":"cordis_mount","arguments":"{\"code\": \"return { name: \\\"snapshot-noop\\\", apply(ctx) {} }\"}"}}
-{"type":"tool/result","seq":162,"time":1785157567049,"data":{"turn":1,"step":2,"callId":"call_00_OyrlxqqpnvzTe11sN5Oy2361","content":[{"type":"text","text":"Temporary Plugin dyn-1 is running (plugin \"snapshot-noop\"; available until unmounted or DSH restarts)."}],"isError":false},"sourceEventSeqs":[161],"surfaceOp":"append"}
-{"type":"step/end","seq":163,"time":1785157567050,"data":{"turn":1,"step":2}}
-{"type":"step/start","seq":164,"time":1785157567050,"data":{"turn":1,"step":3}}
-{"type":"assistant/chunk","seq":165,"time":1785157567835,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"assistant/chunk","seq":189,"time":1785157568117,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":203,"time":1785157568278,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The Host returned snap-1/pkg-1, so I will request its first activation."}}}}
-{"type":"assistant/chunk","seq":204,"time":1785157568279,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"cordis-run","name":"cordis_run","arguments":"{\"pluginId\":\"snap-1\",\"packageId\":\"pkg-1\",\"mode\":\"run\"}"}}}}
-{"type":"assistant/chunk","seq":205,"time":1785157568279,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":63,"outputTokens":72,"cacheReadTokens":16640,"reasoningTokens":23}}}}
-{"type":"assistant/chunk","seq":206,"time":1785157568279,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":207,"time":1785157568280,"data":{"turn":1,"step":3,"content":[{"type":"reasoning","text":"The id is \"dyn-1\". Now step 3: call cordis_unmount with that id."},{"type":"tool-call","id":"call_00_e38S6zeYdZGvbhecUCil6659","name":"cordis_unmount","arguments":"{\"id\": \"dyn-1\"}"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":63,"outputTokens":72,"cacheReadTokens":16640,"reasoningTokens":23}},"sourceEventSeqs":[165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206],"surfaceOp":"append"}
-{"type":"tool/call","seq":208,"time":1785157568280,"data":{"turn":1,"step":3,"callId":"call_00_e38S6zeYdZGvbhecUCil6659","name":"cordis_unmount","arguments":"{\"id\": \"dyn-1\"}"}}
-{"type":"tool/result","seq":209,"time":1785157568281,"data":{"turn":1,"step":3,"callId":"call_00_e38S6zeYdZGvbhecUCil6659","content":[{"type":"text","text":"Temporary Plugin dyn-1 was unmounted and removed."}],"isError":false},"sourceEventSeqs":[208],"surfaceOp":"append"}
-{"type":"step/end","seq":210,"time":1785157568282,"data":{"turn":1,"step":3}}
-{"type":"step/start","seq":211,"time":1785157568282,"data":{"turn":1,"step":4}}
-{"type":"assistant/chunk","seq":212,"time":1785157569185,"data":{"turn":1,"step":4,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"assistant/chunk","seq":235,"time":1785157569515,"data":{"turn":1,"step":4,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":243,"time":1785157569551,"data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The activation request has been submitted, so I will return the requested readiness marker."}}}}
-{"type":"assistant/chunk","seq":244,"time":1785157569551,"data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"CORDIS_UI_READY"}}}}
-{"type":"assistant/chunk","seq":245,"time":1785157569551,"data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":29,"outputTokens":30,"cacheReadTokens":16768,"reasoningTokens":22}}}}
-{"type":"assistant/chunk","seq":246,"time":1785157569551,"data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":247,"time":1785157569553,"data":{"turn":1,"step":4,"content":[{"type":"reasoning","text":"All three calls succeeded. I should now reply exactly \"CORDIS_UI_DONE\" and stop."},{"type":"text","text":"CORDIS_UI_DONE"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":29,"outputTokens":30,"cacheReadTokens":16768,"reasoningTokens":22}},"sourceEventSeqs":[212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246],"surfaceOp":"append"}
-{"type":"step/end","seq":248,"time":1785157569554,"data":{"turn":1,"step":4}}
-{"type":"turn/end","seq":249,"time":1785157569554,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"user/message","seq":250,"time":1785157569555,"data":{"content":[{"type":"text","text":"Use only Cordis tools. Call cordis_stop with pluginId \"snap-1\". After it succeeds, reply exactly CORDIS_UI_DONE and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
-{"type":"assistant/chunk","seq":251,"time":1785157569556,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":252,"time":1785157569557,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"The Cordis Plugin is running."}}}}
-{"type":"assistant/chunk","seq":253,"time":1785157569558,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":254,"time":1785157569559,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/chunk","seq":255,"time":1785157569560,"data":{"turn":3,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":256,"time":1785157569561,"data":{"turn":3,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"cordis-stop","name":"cordis_stop","arguments":"{\"pluginId\":\"snap-1\"}"}}}}
-{"type":"assistant/chunk","seq":257,"time":1785157569562,"data":{"turn":3,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":258,"time":1785157569563,"data":{"turn":3,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/chunk","seq":259,"time":1785157569564,"data":{"turn":3,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":260,"time":1785157569565,"data":{"turn":3,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CORDIS_UI_DONE"}}}}
-{"type":"assistant/chunk","seq":261,"time":1785157569566,"data":{"turn":3,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":262,"time":1785157569567,"data":{"turn":3,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"turn/start","data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Use only Cordis tools. First call cordis_inspect_self with no arguments. Then call cordis_define with plugin kind \"new\", idPrefix \"snap\", name \"snapshot noop\", purpose \"does nothing, for the snapshot\", code.host exactly \"return { name: \\\"snapshot-noop\\\", apply(ctx) {} }\" and code.client exactly \"return { inject: [\\\"slots\\\"], apply(ctx) { ctx.slots.register({ name: \\\"shell.overlay\\\", id: \\\"snapshot-probe\\\" }, () => React.createElement(\\\"div\\\", { \\\"data-snapshot-probe\\\": \\\"loaded\\\" })) } }\". Read its returned pluginId and packageId, then call cordis_run with those exact IDs and mode \"run\". After the run request returns, reply exactly CORDIS_UI_READY and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Use only Cordis tools. First","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash","reasoningEffort":"high"},"system":"{{system}}","tools":"{{tools}}","messagePrefix":["{{messagePrefix}}"]},"reason":"initial"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"I will inspect the current Session's dynamic Cordis Plugins before defining the snapshot Package."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"cordis-inspect-self","name":"cordis_inspect_self","arguments":"{}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":15137,"outputTokens":128,"cacheReadTokens":1280,"reasoningTokens":81}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"content":[{"type":"reasoning","text":"The user wants me to:\n1. Call `cordis_inspect` with `what: \"temporary\"`\n2. Call `cordis_mount` with the exact code provided\n3. Read the returned id and call `cordis_unmount` with that exact id\n4. Reply exactly \"CORDIS_UI_DONE\" and stop\n\nLet me start with step 1."},{"type":"tool-call","id":"call_00_KZk918WtlKan9pHMULIT8794","name":"cordis_inspect","arguments":"{\"what\": \"temporary\"}"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":15137,"outputTokens":128,"cacheReadTokens":1280,"reasoningTokens":81}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_00_KZk918WtlKan9pHMULIT8794","name":"cordis_inspect","arguments":"{\"what\": \"temporary\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"callId":"call_00_KZk918WtlKan9pHMULIT8794","content":[{"type":"text","text":"## Temporary Plugins\nNo temporary Plugins are running. Temporary Plugins created with cordis_mount disappear when DSH restarts."}],"isError":false},"sourceEventSeqs":[104],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"No dynamic Plugins are present, so I will define the requested Host and Client Package."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"cordis-define","name":"cordis_define","arguments":"{\"plugin\":{\"kind\":\"new\",\"idPrefix\":\"snap\"},\"name\":\"snapshot noop\",\"purpose\":\"does nothing, for the snapshot\",\"code\":{\"host\":\"return { name: \\\"snapshot-noop\\\", apply(ctx) {} }\",\"client\":\"return { inject: [\\\"slots\\\"], apply(ctx) { ctx.slots.register({ name: \\\"shell.overlay\\\", id: \\\"snapshot-probe\\\" }, () => React.createElement(\\\"div\\\", { \\\"data-snapshot-probe\\\": \\\"loaded\\\" })) } }\"}}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":72,"outputTokens":82,"cacheReadTokens":16512,"reasoningTokens":22}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"content":[{"type":"reasoning","text":"Good, no temporary plugins running. Now step 2: call cordis_mount with the exact code."},{"type":"tool-call","id":"call_00_OyrlxqqpnvzTe11sN5Oy2361","name":"cordis_mount","arguments":"{\"code\": \"return { name: \\\"snapshot-noop\\\", apply(ctx) {} }\"}"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":72,"outputTokens":82,"cacheReadTokens":16512,"reasoningTokens":22}},"sourceEventSeqs":[108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":2,"callId":"call_00_OyrlxqqpnvzTe11sN5Oy2361","name":"cordis_mount","arguments":"{\"code\": \"return { name: \\\"snapshot-noop\\\", apply(ctx) {} }\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":2,"callId":"call_00_OyrlxqqpnvzTe11sN5Oy2361","content":[{"type":"text","text":"Temporary Plugin dyn-1 is running (plugin \"snapshot-noop\"; available until unmounted or DSH restarts)."}],"isError":false},"sourceEventSeqs":[161],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"step/start","data":{"turn":1,"step":3}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The Host returned snap-1/pkg-1, so I will request its first activation."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"cordis-run","name":"cordis_run","arguments":"{\"pluginId\":\"snap-1\",\"packageId\":\"pkg-1\",\"mode\":\"run\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":63,"outputTokens":72,"cacheReadTokens":16640,"reasoningTokens":23}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":3,"content":[{"type":"reasoning","text":"The id is \"dyn-1\". Now step 3: call cordis_unmount with that id."},{"type":"tool-call","id":"call_00_e38S6zeYdZGvbhecUCil6659","name":"cordis_unmount","arguments":"{\"id\": \"dyn-1\"}"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":63,"outputTokens":72,"cacheReadTokens":16640,"reasoningTokens":23}},"sourceEventSeqs":[165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":3,"callId":"call_00_e38S6zeYdZGvbhecUCil6659","name":"cordis_unmount","arguments":"{\"id\": \"dyn-1\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":3,"callId":"call_00_e38S6zeYdZGvbhecUCil6659","content":[{"type":"text","text":"Temporary Plugin dyn-1 was unmounted and removed."}],"isError":false},"sourceEventSeqs":[208],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":3}}
+{"type":"step/start","data":{"turn":1,"step":4}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The activation request has been submitted, so I will return the requested readiness marker."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"CORDIS_UI_READY"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":29,"outputTokens":30,"cacheReadTokens":16768,"reasoningTokens":22}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":4,"content":[{"type":"reasoning","text":"All three calls succeeded. I should now reply exactly \"CORDIS_UI_DONE\" and stop."},{"type":"text","text":"CORDIS_UI_DONE"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":29,"outputTokens":30,"cacheReadTokens":16768,"reasoningTokens":22}},"sourceEventSeqs":[212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":4}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Use only Cordis tools. Call cordis_stop with pluginId \"snap-1\". After it succeeds, reply exactly CORDIS_UI_DONE and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"The Cordis Plugin is running."}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"cordis-stop","name":"cordis_stop","arguments":"{\"pluginId\":\"snap-1\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CORDIS_UI_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
diff --git a/apps/web/tests/snapshots/feedback-command/session.jsonl b/apps/web/tests/snapshots/feedback-command/session.jsonl
index d528f36c0e..75f3c37a02 100644
--- a/apps/web/tests/snapshots/feedback-command/session.jsonl
+++ b/apps/web/tests/snapshots/feedback-command/session.jsonl
@@ -1,17 +1,17 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1785015039278,"cwd":"{{cwd}}/workspace"}
-{"type":"turn/start","seq":0,"time":1785015039291,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
-{"type":"user/message","seq":1,"time":1785015039292,"data":{"content":[{"type":"text","text":"Reply with the single word LIGHTHOUSE and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
-{"type":"session/title","seq":2,"time":1785015039294,"data":{"title":"Reply with the single word","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":3,"time":1785015039362,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":4,"time":1785015039363,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}","messagePrefix":["{{messagePrefix}}"]},"reason":"initial"}}
-{"type":"assistant/chunk","seq":5,"time":1785015039930,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"reasoning-chunks","seq0":6,"time0":1785015039930,"data":{"turn":1,"step":1,"index":0,"dt":[162,28,1,0,0,46,1,0,0,0,11,0,0,30],"texts":["The"," user"," wants"," me"," to"," reply"," with"," a"," single"," word","."," Let"," me"," comply","."]}}
-{"type":"assistant/chunk","seq":21,"time":1785015040209,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
-{"type":"text-chunks","seq0":22,"time0":1785015040209,"data":{"turn":1,"step":1,"index":1,"dt":[1,0,30,1],"texts":["L","IGH","TH","O","USE"]}}
-{"type":"assistant/chunk","seq":27,"time":1785015040241,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to reply with a single word. Let me comply."}}}}
-{"type":"assistant/chunk","seq":28,"time":1785015040242,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"LIGHTHOUSE"}}}}
-{"type":"assistant/chunk","seq":29,"time":1785015040242,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":109,"outputTokens":21,"cacheReadTokens":7680,"reasoningTokens":15}}}}
-{"type":"assistant/chunk","seq":30,"time":1785015040242,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":31,"time":1785015040244,"data":{"turn":1,"step":1,"content":[{"type":"reasoning","text":"The user wants me to reply with a single word. Let me comply."},{"type":"text","text":"LIGHTHOUSE"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":109,"outputTokens":21,"cacheReadTokens":7680,"reasoningTokens":15}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30],"surfaceOp":"append"}
-{"type":"step/end","seq":32,"time":1785015040246,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":33,"time":1785015040247,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with the single word LIGHTHOUSE and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with the single word","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}","messagePrefix":["{{messagePrefix}}"]},"reason":"initial"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":1,"index":0,"dt":[162,28,1,0,0,46,1,0,0,0,11,0,0,30],"texts":["The"," user"," wants"," me"," to"," reply"," with"," a"," single"," word","."," Let"," me"," comply","."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"text-chunks","data":{"turn":1,"step":1,"index":1,"dt":[1,0,30,1],"texts":["L","IGH","TH","O","USE"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to reply with a single word. Let me comply."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"LIGHTHOUSE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":109,"outputTokens":21,"cacheReadTokens":7680,"reasoningTokens":15}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"content":[{"type":"reasoning","text":"The user wants me to reply with a single word. Let me comply."},{"type":"text","text":"LIGHTHOUSE"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":109,"outputTokens":21,"cacheReadTokens":7680,"reasoningTokens":15}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/apps/web/tests/snapshots/fresh-round-trip/session.jsonl b/apps/web/tests/snapshots/fresh-round-trip/session.jsonl
index 3aa97623f1..f146475b63 100644
--- a/apps/web/tests/snapshots/fresh-round-trip/session.jsonl
+++ b/apps/web/tests/snapshots/fresh-round-trip/session.jsonl
@@ -1,31 +1,31 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1784973850091,"cwd":"{{cwd}}/workspace"}
-{"type":"turn/start","seq":0,"time":1784973850102,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
-{"type":"user/message","seq":1,"time":1784973850103,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo WEB_E2E_OK. Then reply with the single word DONE and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
-{"type":"session/title","seq":2,"time":1784973850105,"data":{"title":"Use the bash tool to","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":3,"time":1784973850164,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":4,"time":1784973850165,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}","messagePrefix":["{{messagePrefix}}"]},"reason":"initial"}}
-{"type":"assistant/chunk","seq":5,"time":1784973850888,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"reasoning-chunks","seq0":6,"time0":1784973850889,"data":{"turn":1,"step":1,"index":0,"dt":[199,1,0,0,0,18,1,0,0,0,0,27,0,1,0,0],"texts":["The"," user"," wants"," me"," to"," run"," a"," simple"," bash"," command"," and"," reply"," with"," \"","D","ONE","\"."]}}
-{"type":"assistant/chunk","seq":23,"time":1784973851217,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
-{"type":"tool-call-chunks","seq0":24,"time0":1784973851217,"data":{"turn":1,"step":1,"index":1,"dt":[27,0,0,0,1,26,0,0,1,27,0,0,1,26,0,26,1,0,0,26,27,0,29,0,0,26],"id":"call_00_BYXlxjFaalMg95YVqEeF2495","name":"bash","args":["","{","\"","command","\"",": ","\"","echo"," WEB","_E","2","E","_OK","\"",", ","\"","description","\"",": ","\"","E","cho"," the"," test"," string","\"","}"]}}
-{"type":"assistant/chunk","seq":51,"time":1784973851493,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to run a simple bash command and reply with \"DONE\"."}}}}
-{"type":"assistant/chunk","seq":52,"time":1784973851493,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_BYXlxjFaalMg95YVqEeF2495","name":"bash","arguments":"{\"command\": \"echo WEB_E2E_OK\", \"description\": \"Echo the test string\"}"}}}}
-{"type":"assistant/chunk","seq":53,"time":1784973851493,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":122,"outputTokens":85,"cacheReadTokens":7680,"reasoningTokens":17}}}}
-{"type":"assistant/chunk","seq":54,"time":1784973851493,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":55,"time":1784973851498,"data":{"turn":1,"step":1,"content":[{"type":"reasoning","text":"The user wants me to run a simple bash command and reply with \"DONE\"."},{"type":"tool-call","id":"call_00_BYXlxjFaalMg95YVqEeF2495","name":"bash","arguments":"{\"command\": \"echo WEB_E2E_OK\", \"description\": \"Echo the test string\"}"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":122,"outputTokens":85,"cacheReadTokens":7680,"reasoningTokens":17}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54],"surfaceOp":"append"}
-{"type":"tool/call","seq":56,"time":1784973851499,"data":{"turn":1,"step":1,"callId":"call_00_BYXlxjFaalMg95YVqEeF2495","name":"bash","arguments":"{\"command\": \"echo WEB_E2E_OK\", \"description\": \"Echo the test string\"}"}}
-{"type":"tool/result","seq":57,"time":1784973851515,"data":{"turn":1,"step":1,"callId":"call_00_BYXlxjFaalMg95YVqEeF2495","content":[{"type":"text","text":"WEB_E2E_OK\n"}],"isError":false},"sourceEventSeqs":[56],"surfaceOp":"append"}
-{"type":"step/end","seq":58,"time":1784973851517,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":59,"time":1784973851518,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":60,"time":1784973852194,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"reasoning-chunks","seq0":61,"time0":1784973852195,"data":{"turn":1,"step":2,"index":0,"dt":[114,29,1,0,0,31,0,1,0,0,0,27,0,0,0,30,1,0,0,0,0,30],"texts":["The"," command"," executed"," successfully"," and"," output"," \"","WEB","_E","2","E","_OK","\"."," I"," just"," need"," to"," reply"," with"," \"","D","ONE","\"."]}}
-{"type":"assistant/chunk","seq":84,"time":1784973852459,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":85,"time":1784973852459,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":1,"text":"D"}}}
-{"type":"assistant/chunk","seq":86,"time":1784973852459,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":1,"text":"ONE"}}}
-{"type":"assistant/chunk","seq":87,"time":1784973852459,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The command executed successfully and output \"WEB_E2E_OK\". I just need to reply with \"DONE\"."}}}}
-{"type":"assistant/chunk","seq":88,"time":1784973852460,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
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diff --git a/apps/web/tests/snapshots/goal-multi-turn-actions/session.jsonl b/apps/web/tests/snapshots/goal-multi-turn-actions/session.jsonl
index 1233d12f56..26b7f8d7fe 100644
--- a/apps/web/tests/snapshots/goal-multi-turn-actions/session.jsonl
+++ b/apps/web/tests/snapshots/goal-multi-turn-actions/session.jsonl
@@ -1,183 +1,183 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1786073817152,"cwd":"{{cwd}}/workspace"}
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-{"type":"assistant/chunk","seq":2092,"time":1786073848306,"data":{"turn":2,"step":6,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"两个 turn 都完成了 ✅\n\n**总结：**\n\n- **Turn 1** — 随机选中 `packages/context/session-reference`，输出了文件结构：\n  ```\n  session-reference/\n  ├── README.md\n  ├── package.json\n  ├── src/\n  │   ├── index.ts\n  │   └── uri.ts\n  └── tests/\n      └── session-reference.spec.ts\n  ```\n- **Turn 2** — 随机选中 `packages/llm/token-meter`，输出了文件结构：\n  ```\n  token-meter/\n  ├── README.md\n  ├── package.json\n  ├── src/\n  │   └── index.ts\n  └── tests/\n      └── token-meter.spec.ts\n  ```\n\n**验证方式：** 两个包的随机选择都通过 `python3 random.choice` 从工作区的 `packages/` 目录下实际枚举的 4 个候选包中抽取（`ui-conversation`、`session-reference`、`token-meter`、`skill-filesystem`），文件结构则用 `find` 实际列出文件后整理输出，均已排除 `node_modules` 和 `.git`。第二次随机抽到了与 turn 1 相同的包，为避免重复换抽了另一个。\n\n**说明：** 本轮没有产生任何文件修改或提交——任务本身就是\"输出文件结构\"，所有产物都在上面的消息文本里。\n\n如果你还想看剩下两个包（`ui-conversation`、`skill-filesystem`）的结构，或者其他格式的输出（比如带文件大小的树形图），随时告诉我。"}}}}
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-{"type":"assistant/message","seq":2095,"time":1786073848307,"data":{"turn":2,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"两个 turn 都完成了 ✅\n\n**总结：**\n\n- **Turn 1** — 随机选中 `packages/context/session-reference`，输出了文件结构：\n  ```\n  session-reference/\n  ├── README.md\n  ├── package.json\n  ├── src/\n  │   ├── index.ts\n  │   └── uri.ts\n  └── tests/\n      └── session-reference.spec.ts\n  ```\n- **Turn 2** — 随机选中 `packages/llm/token-meter`，输出了文件结构：\n  ```\n  token-meter/\n  ├── README.md\n  ├── package.json\n  ├── src/\n  │   └── index.ts\n  └── tests/\n      └── token-meter.spec.ts\n  ```\n\n**验证方式：** 两个包的随机选择都通过 `python3 random.choice` 从工作区的 `packages/` 目录下实际枚举的 4 个候选包中抽取（`ui-conversation`、`session-reference`、`token-meter`、`skill-filesystem`），文件结构则用 `find` 实际列出文件后整理输出，均已排除 `node_modules` 和 `.git`。第二次随机抽到了与 turn 1 相同的包，为避免重复换抽了另一个。\n\n**说明：** 本轮没有产生任何文件修改或提交——任务本身就是\"输出文件结构\"，所有产物都在上面的消息文本里。\n\n如果你还想看剩下两个包（`ui-conversation`、`skill-filesystem`）的结构，或者其他格式的输出（比如带文件大小的树形图），随时告诉我。"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5a1daadd-6f23-49ea-980b-6f96f67e3f52"},"usage":{"inputTokens":311,"outputTokens":348,"cacheReadTokens":10624,"reasoningTokens":0}},"sourceEventSeqs":[1750,1751,1752,1753,1754,1755,1756,1757,1758,1759,1760,1761,1762,1763,1764,1765,1766,1767,1768,1769,1770,1771,1772,1773,1774,1775,1776,1777,1778,1779,1780,1781,1782,1783,1784,1785,1786,1787,1788,1789,1790,1791,1792,1793,1794,1795,1796,1797,1798,1799,1800,1801,1802,1803,1804,1805,1806,1807,1808,1809,1810,1811,1812,1813,1814,1815,1816,1817,1818,1819,1820,1821,1822,1823,1824,1825,1826,1827,1828,1829,1830,1831,1832,1833,1834,1835,1836,1837,1838,1839,1840,1841,1842,1843,1844,1845,1846,1847,1848,1849,1850,1851,1852,1853,1854,1855,1856,1857,1858,1859,1860,1861,1862,1863,1864,1865,1866,1867,1868,1869,1870,1871,1872,1873,1874,1875,1876,1877,1878,1879,1880,1881,1882,1883,1884,1885,1886,1887,1888,1889,1890,1891,1892,1893,1894,1895,1896,1897,1898,1899,1900,1901,1902,1903,1904,1905,1906,1907,1908,1909,1910,1911,1912,1913,1914,1915,1916,1917,1918,1919,1920,1921,1922,1923,1924,1925,1926,1927,1928,1929,1930,1931,1932,1933,1934,1935,1936,1937,1938,1939,1940,1941,1942,1943,1944,1945,1946,1947,1948,1949,1950,1951,1952,1953,1954,1955,1956,1957,1958,1959,1960,1961,1962,1963,1964,1965,1966,1967,1968,1969,1970,1971,1972,1973,1974,1975,1976,1977,1978,1979,1980,1981,1982,1983,1984,1985,1986,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,2024,2025,2026,2027,2028,2029,2030,2031,2032,2033,2034,2035,2036,2037,2038,2039,2040,2041,2042,2043,2044,2045,2046,2047,2048,2049,2050,2051,2052,2053,2054,2055,2056,2057,2058,2059,2060,2061,2062,2063,2064,2065,2066,2067,2068,2069,2070,2071,2072,2073,2074,2075,2076,2077,2078,2079,2080,2081,2082,2083,2084,2085,2086,2087,2088,2089,2090,2091,2092,2093,2094],"surfaceOp":"append"}
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+{"type":"assistant/message","data":{"turn":2,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"两个 turn 都完成了 ✅\n\n**总结：**\n\n- **Turn 1** — 随机选中 `packages/context/session-reference`，输出了文件结构：\n  ```\n  session-reference/\n  ├── README.md\n  ├── package.json\n  ├── src/\n  │   ├── index.ts\n  │   └── uri.ts\n  └── tests/\n      └── session-reference.spec.ts\n  ```\n- **Turn 2** — 随机选中 `packages/llm/token-meter`，输出了文件结构：\n  ```\n  token-meter/\n  ├── README.md\n  ├── package.json\n  ├── src/\n  │   └── index.ts\n  └── tests/\n      └── token-meter.spec.ts\n  ```\n\n**验证方式：** 两个包的随机选择都通过 `python3 random.choice` 从工作区的 `packages/` 目录下实际枚举的 4 个候选包中抽取（`ui-conversation`、`session-reference`、`token-meter`、`skill-filesystem`），文件结构则用 `find` 实际列出文件后整理输出，均已排除 `node_modules` 和 `.git`。第二次随机抽到了与 turn 1 相同的包，为避免重复换抽了另一个。\n\n**说明：** 本轮没有产生任何文件修改或提交——任务本身就是\"输出文件结构\"，所有产物都在上面的消息文本里。\n\n如果你还想看剩下两个包（`ui-conversation`、`skill-filesystem`）的结构，或者其他格式的输出（比如带文件大小的树形图），随时告诉我。"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5a1daadd-6f23-49ea-980b-6f96f67e3f52"},"usage":{"inputTokens":311,"outputTokens":348,"cacheReadTokens":10624,"reasoningTokens":0}},"sourceEventSeqs":[1750,1751,1752,1753,1754,1755,1756,1757,1758,1759,1760,1761,1762,1763,1764,1765,1766,1767,1768,1769,1770,1771,1772,1773,1774,1775,1776,1777,1778,1779,1780,1781,1782,1783,1784,1785,1786,1787,1788,1789,1790,1791,1792,1793,1794,1795,1796,1797,1798,1799,1800,1801,1802,1803,1804,1805,1806,1807,1808,1809,1810,1811,1812,1813,1814,1815,1816,1817,1818,1819,1820,1821,1822,1823,1824,1825,1826,1827,1828,1829,1830,1831,1832,1833,1834,1835,1836,1837,1838,1839,1840,1841,1842,1843,1844,1845,1846,1847,1848,1849,1850,1851,1852,1853,1854,1855,1856,1857,1858,1859,1860,1861,1862,1863,1864,1865,1866,1867,1868,1869,1870,1871,1872,1873,1874,1875,1876,1877,1878,1879,1880,1881,1882,1883,1884,1885,1886,1887,1888,1889,1890,1891,1892,1893,1894,1895,1896,1897,1898,1899,1900,1901,1902,1903,1904,1905,1906,1907,1908,1909,1910,1911,1912,1913,1914,1915,1916,1917,1918,1919,1920,1921,1922,1923,1924,1925,1926,1927,1928,1929,1930,1931,1932,1933,1934,1935,1936,1937,1938,1939,1940,1941,1942,1943,1944,1945,1946,1947,1948,1949,1950,1951,1952,1953,1954,1955,1956,1957,1958,1959,1960,1961,1962,1963,1964,1965,1966,1967,1968,1969,1970,1971,1972,1973,1974,1975,1976,1977,1978,1979,1980,1981,1982,1983,1984,1985,1986,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,2024,2025,2026,2027,2028,2029,2030,2031,2032,2033,2034,2035,2036,2037,2038,2039,2040,2041,2042,2043,2044,2045,2046,2047,2048,2049,2050,2051,2052,2053,2054,2055,2056,2057,2058,2059,2060,2061,2062,2063,2064,2065,2066,2067,2068,2069,2070,2071,2072,2073,2074,2075,2076,2077,2078,2079,2080,2081,2082,2083,2084,2085,2086,2087,2088,2089,2090,2091,2092,2093,2094],"surfaceOp":"append"}
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diff --git a/apps/web/tests/snapshots/lifecycle-chrome/session.jsonl b/apps/web/tests/snapshots/lifecycle-chrome/session.jsonl
index d528f36c0e..75f3c37a02 100644
--- a/apps/web/tests/snapshots/lifecycle-chrome/session.jsonl
+++ b/apps/web/tests/snapshots/lifecycle-chrome/session.jsonl
@@ -1,17 +1,17 @@
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diff --git a/apps/web/tests/snapshots/live-interactions/session.jsonl b/apps/web/tests/snapshots/live-interactions/session.jsonl
index 9e1d99adae..edc4b3b8c8 100644
--- a/apps/web/tests/snapshots/live-interactions/session.jsonl
+++ b/apps/web/tests/snapshots/live-interactions/session.jsonl
@@ -1,17 +1,17 @@
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diff --git a/apps/web/tests/snapshots/message-feedback-protocol/session.jsonl b/apps/web/tests/snapshots/message-feedback-protocol/session.jsonl
index d970fb8cb4..a50e81c8d8 100644
--- a/apps/web/tests/snapshots/message-feedback-protocol/session.jsonl
+++ b/apps/web/tests/snapshots/message-feedback-protocol/session.jsonl
@@ -1,7 +1,7 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1786406400000,"cwd":"{{cwd}}"}
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diff --git a/apps/web/tests/snapshots/minimal-preset/session.jsonl b/apps/web/tests/snapshots/minimal-preset/session.jsonl
index 49977be802..65951677a2 100644
--- a/apps/web/tests/snapshots/minimal-preset/session.jsonl
+++ b/apps/web/tests/snapshots/minimal-preset/session.jsonl
@@ -1,7 +1,7 @@
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index 675588a51e..4518912b6e 100644
--- a/apps/web/tests/snapshots/navigation-panes/seed.jsonl
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+{"type":"assistant/message","data":{"turn":1,"step":1,"content":[{"type":"reasoning","text":"The user wants me to follow a specific navigation scenario. Let me:\n\n1. Run bash to print \"NAVIGATION_OK\"\n2. Read nav-a.md and nav-b.md in two read calls in ONE message\n3. Reply with \"FIRST_DONE\"\n\nLet me start with the bash command and the reads."},{"type":"tool-call","id":"call_00_kFKHaEXcTYEex0iDZw0C2432","name":"bash","arguments":"{\"command\": \"echo NAVIGATION_OK\", \"description\": \"Print NAVIGATION_OK\"}"},{"type":"tool-call","id":"call_01_tK4hIIRVTMgAvdzs7m9j6212","name":"read","arguments":"{\"file_path\": \"nav-a.md\"}"},{"type":"tool-call","id":"call_02_k8Z6wGirxfnW96Iv8mkz9224","name":"read","arguments":"{\"file_path\": \"nav-b.md\"}"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":140,"outputTokens":197,"cacheReadTokens":7680,"reasoningTokens":66}},"sourceEventSeqs":[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132],"surfaceOp":"append"}
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+{"type":"tool/result","data":{"turn":1,"step":1,"callId":"call_00_kFKHaEXcTYEex0iDZw0C2432","content":[{"type":"text","text":"NAVIGATION_OK\n"}],"isError":false},"sourceEventSeqs":[134],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_01_tK4hIIRVTMgAvdzs7m9j6212","name":"read","arguments":"{\"file_path\": \"nav-a.md\"}"}}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_02_k8Z6wGirxfnW96Iv8mkz9224","name":"read","arguments":"{\"file_path\": \"nav-b.md\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"callId":"call_01_tK4hIIRVTMgAvdzs7m9j6212","content":[{"type":"text","text":"<path>{{cwd}}/workspace/nav-a.md</path>\n<type>file</type>\n<content>\n1: # alpha nav\n\n(End of file - total 1 lines)\n</content>"}],"isError":false},"sourceEventSeqs":[136],"surfaceOp":"append"}
+{"type":"tool/result","data":{"turn":1,"step":1,"callId":"call_02_k8Z6wGirxfnW96Iv8mkz9224","content":[{"type":"text","text":"<path>{{cwd}}/workspace/nav-b.md</path>\n<type>file</type>\n<content>\n1: # beta nav\n\n(End of file - total 1 lines)\n</content>"}],"isError":false},"sourceEventSeqs":[137],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":2,"index":0,"dt":[90,27,27,1,0,0,0,26,1,0,0,0,0,27,0,0,0,0,27,0,0,27,0,0,0,0,1,25,1,0,0,0,0,26,1,0,0,0,0,25,1,0,26,1,0,0,0,0,26,1],"texts":["All"," three"," calls"," succeeded",":\n","1","."," bash"," printed"," \"","NA","V","IG","ATION","_OK","\"\n","2","."," nav","-a",".md"," contains"," \"#"," alpha"," nav","\"\n","3","."," nav","-b",".md"," contains"," \"#"," beta"," nav","\"\n\n","Now"," I"," need"," to"," reply"," with"," the"," single"," word"," \"","FIR","ST","_D","ONE","\"."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"text-chunks","data":{"turn":1,"step":2,"index":1,"dt":[0,0,29],"texts":["FIR","ST","_D","ONE"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"All three calls succeeded:\n1. bash printed \"NAVIGATION_OK\"\n2. nav-a.md contains \"# alpha nav\"\n3. nav-b.md contains \"# beta nav\"\n\nNow I need to reply with the single word \"FIRST_DONE\"."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"FIRST_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":349,"outputTokens":56,"cacheReadTokens":7808,"reasoningTokens":51}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"content":[{"type":"reasoning","text":"All three calls succeeded:\n1. bash printed \"NAVIGATION_OK\"\n2. nav-a.md contains \"# alpha nav\"\n3. nav-b.md contains \"# beta nav\"\n\nNow I need to reply with the single word \"FIRST_DONE\"."},{"type":"text","text":"FIRST_DONE"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":349,"outputTokens":56,"cacheReadTokens":7808,"reasoningTokens":51}},"sourceEventSeqs":[142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":2,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply in markdown with: a level-2 heading \"Navigation Summary\", a bulleted list of exactly two items, and a fenced code block containing echo WATERFALL. Then stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":2,"step":1,"index":0,"dt":[125,23,1,0,0,88,0,0,5,0,1,0,0,7,0],"texts":["The"," user"," wants"," me"," to"," reply"," with"," a"," specific"," format","."," Let"," me"," do"," that","."]}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"text-chunks","data":{"turn":2,"step":1,"index":1,"dt":[24,1,25,0,0,25,26,1,0,0,0,25,0,0,0,1,26,1],"texts":["##"," Navigation"," Summary","\n\n","-"," alpha"," nav","\n","-"," beta"," nav","\n\n","```\n","echo"," WATER","F","ALL","\n","```"]}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to reply with a specific format. Let me do that."}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"## Navigation Summary\n\n- alpha nav\n- beta nav\n\n```\necho WATERFALL\n```"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":141,"outputTokens":36,"cacheReadTokens":8064,"reasoningTokens":16}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"content":[{"type":"reasoning","text":"The user wants me to reply with a specific format. Let me do that."},{"type":"text","text":"## Navigation Summary\n\n- alpha nav\n- beta nav\n\n```\necho WATERFALL\n```"}],"provenance":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"usage":{"inputTokens":141,"outputTokens":36,"cacheReadTokens":8064,"reasoningTokens":16}},"sourceEventSeqs":[209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/apps/web/tests/snapshots/permission-policy-context/session.jsonl b/apps/web/tests/snapshots/permission-policy-context/session.jsonl
index 3fa11313c9..985a178d3d 100644
--- a/apps/web/tests/snapshots/permission-policy-context/session.jsonl
+++ b/apps/web/tests/snapshots/permission-policy-context/session.jsonl
@@ -1,124 +1,124 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1785421232654,"cwd":"{{cwd}}/workspace"}
-{"type":"command/run","seq":0,"time":1785421232715,"data":{"commandId":"cmd-56ed2b36-1","name":"permission","args":" read-only","source":{"kind":"user"}}}
-{"type":"permission/preset","seq":1,"time":1785421232715,"data":{"preset":"read-only"}}
-{"type":"sandbox/mode","seq":2,"time":1785421232716,"data":{"mode":"read-only"}}
-{"type":"approval/policy","seq":3,"time":1785421232716,"data":{"policy":"ask"}}
-{"type":"command/done","seq":4,"time":1785421232716,"data":{"commandId":"cmd-56ed2b36-1","kind":"success","text":"Permission preset: read-only."}}
-{"type":"turn/start","seq":5,"time":1785421232753,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
-{"type":"user/message","seq":6,"time":1785421232754,"data":{"content":[{"type":"text","text":"Can you create or edit a normal file right now under the current policy? Answer directly in one sentence. Do not call a tool just to discover the policy."}],"source":{"kind":"user","rpcId":"{{rpcId}}"},"role":"user","id":"93b20d7f-b280-4a61-8ae4-66764f8a541e"},"surfaceOp":"append"}
-{"type":"session/title","seq":7,"time":1785421232754,"data":{"title":"Can you create or edit","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"user/message","seq":8,"time":1785421232818,"data":{"content":[{"type":"text","text":"<system-reminder>\nA skill is a reusable set of task-specific instructions. The following skills are available in this session:\n\n<available_skills>\n- `15-05-premortem`: Use before starting risky work — rebases, large refactors, multi-file migrations, or deploys — to identify failure modes and mitigations in advance.\n- `acceptance-criteria`: 检查Acceptance Criteria格式和完整性，验证是否符合Given-When-Then结构、覆盖正常流程/边界条件/异常场景。适合在为User Story编写AC后、准备测试用例前使用，当需要验收AC质量时。帮助不熟悉BDD的PM/BA确保AC明确、可测试、覆盖完整，避免遗漏关键场景。\n- `agents-sdk`: Build AI agents on Cloudflare Workers using the Agents SDK. Load when creating stateful agents, durable workflows, real-time WebSocket apps, scheduled tasks, MCP servers, chat applications, voice agents, or browser automation. Covers Agent class, state management, callable RPC, Workflows, durable execution, queues, retries, observability, and React hooks. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `aico-pm-user-story-writing`: Transform requirements into well-structured User Stories using \"As a [user], I want [goal], So that [benefit]\" format with Given/When/Then acceptance criteria. Use this skill when: - User asks to \"write user story\", \"create story\", \"add story\" - User mentions \"user story\", \"backlog item\", \"story\" - Running /pm.plan and need to break PRD into implementable stories - Creating backlog items for development team - Need to formalize a requirement into standard story format - Converting feature req...\n- `algorithmic-art`: Creating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users request creating art using code, generative art, algorithmic art, flow fields, or particle systems. Create original algorithmic art rather than copying existing artists' work to avoid copyright violations.\n- `animation-vocabulary`: Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term (\"the bouncy thing when a popover opens\" → Pop in; \"the iOS rubber-band scroll\" → Rubber-banding). Use when the user asks \"what's it called when…\", or describes a motion effect without knowing its name and wants the right word to prompt an AI or designer with. For naming an effect, not designing or building one.\n- `app-comprehensive-test-generator`: Generate exhaustive user-flow and edge-case test scenarios from an app's codebase, produce scenario .md files, execute tests using connected or newly created MCPs, and produce an app.qa.report.md summarizing failures and suggested fixes.\n- `apple-design`: Apple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking, leading), reduced-motion, or the design foundations (feedback, spatial consistency, restraint) behind Apple-style interfaces.\n- `brainstorming`: You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.\n- `brand-guidelines`: Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply.\n- `canvas-design`: Create beautiful visual art in .png and .pdf documents using design philosophy. You should use this skill when the user asks to create a poster, piece of art, design, or other static piece. Create original visual designs, never copying existing artists' work to avoid copyright violations.\n- `claude-api`: Reference for the Claude API / Anthropic SDK — model ids, pricing, params, streaming, tool use, MCP, agents, caching, token counting, model migration. TRIGGER — read BEFORE opening the target file; don't skip because it \"looks like a one-liner\" — whenever: the prompt names Claude/Anthropic in any form (Claude, Anthropic, Fable, Opus, Sonnet, Haiku, `anthropic`, `@anthropic-ai`, `claude-*`, `us.anthropic.*`, `[1m]`); the user asks about an LLM (pricing/model choice/limits/caching) — never answ...\n- `cloudflare`: Comprehensive Cloudflare platform skill covering Workers, Pages, storage (KV, D1, R2), AI (Workers AI, Vectorize, Agents SDK), feature flags (Flagship), networking (Tunnel, Spectrum), security (WAF, DDoS), and infrastructure-as-code (Terraform, Pulumi). Use for any Cloudflare development task. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `cloudflare-email-service`: Send and receive transactional emails with Cloudflare Email Service (Email Sending + Email Routing). Use when building email sending (Workers binding or REST API), email routing, Agents SDK email handling, or integrating email into any app — Workers, Node.js, Python, Go, etc. Also use for email deliverability, SPF/DKIM/DMARC, wrangler email setup, MCP email tools, or when a coding agent needs to send emails. Even for simple requests like \"add email to my Worker\" — this skill has critical conf...\n- `cloudflare-one`: Guides Cloudflare One Zero Trust and SASE work across Access, Gateway, WARP, Tunnel, Cloudflare WAN, DLP, CASB, device posture, and identity. Use when designing, configuring, troubleshooting, or reviewing Cloudflare One deployments. Retrieval-first: use current Cloudflare docs/API schemas instead of embedded product docs.\n- `cloudflare-one-migrations`: Plans migrations from Zscaler ZIA/ZPA, Palo Alto, legacy VPN, SWG, or SASE stacks to Cloudflare One. Use for migration assessments, policy mapping, rollout plans, and parity/gap analysis.\n- `code-review`: Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes — Standards (does the code follow this repo's documented coding standards?) and Spec (does the code match what the originating issue/PRD asked for?). Runs both reviews in parallel sub-agents and reports them side by side. Use when the user wants to review a branch, a PR, work-in-progress changes, or asks to \"review since X\".\n- `codebase-design`: Shared vocabulary for designing deep modules. Use when the user wants to design or improve a module's interface, find deepening opportunities, decide where a seam goes, make code more testable or AI-navigable, or when another skill needs the deep-module vocabulary.\n- `content-refiner`: Refine verbose educational content by eliminating redundancy, tightening prose, and strengthening lesson connections. Use when content is wordy, repetitive, or lacks narrative flow between sections.\n- `context-compression`: This skill should be used when long-running agent sessions need context compression, structured summarization, compaction, token-per-task optimization, or durable handoff summaries that preserve decisions, files, risks, and next actions.\n- `create-feishu-doc`: Create a Feishu document and grant edit permissions to the user. Use when asked to write content to Feishu or create a document in a wiki space.\n- `design-compass`: Use when doing any product or UI design work — brainstorming a feature, starting a visual/interaction direction, reviewing half-built UI, or final-checking before ship; also when unsure which design skill applies. 产品设计 / 界面设计 / 交互设计 / UI review / 脑暴 / 视觉方向 / 设计验收时使用。\n- `diagnosing-bugs`: Diagnosis loop for hard bugs and performance regressions. Use when the user says \"diagnose\"/\"debug this\", or reports something broken/throwing/failing/slow.\n- `doc-coauthoring`: Guide users through a structured workflow for co-authoring documentation. Use when user wants to write documentation, proposals, technical specs, decision docs, or similar structured content. This workflow helps users efficiently transfer context, refine content through iteration, and verify the doc works for readers. Trigger when user mentions writing docs, creating proposals, drafting specs, or similar documentation tasks.\n- `docx`: Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. When Claude needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4) Adding comments, or any other document tasks\n- `domain-modeling`: Build and sharpen a project's domain model. Use when the user wants to pin down domain terminology or a ubiquitous language, record an architectural decision, or when another skill needs to maintain the domain model.\n- `durable-objects`: Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `ego-browser`: ego-browser (ego-lite) is a Chromium-based browser designed from the ground up to be friendly to both human users and AI Agents. AI Agents work in their own isolated space, reusing the user's login state without competing for the browser. Use this skill whenever the user needs to interact with a website opening pages, filling forms, clicking buttons, taking screenshots, extracting page data, testing web apps, logging into sites, automating browser operations, or any other browser automation t...\n- `emil-design-eng`: This skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great.\n- `feishu-workflow`: 飞书文档全流程管理 — 搜索、创建、编辑 wiki 文档，支持内容排版、表格、代码块、白板\n- `find-animation-opportunities`: Search a codebase or UI for places that don't animate but should, and reject everything that shouldn't. Read-only; it proposes motion with exact values, it does not implement it. Use when the user asks \"what could be animated here?\" or wants to \"make this feel more alive\". For fixing existing animations, use improve-animations or review-animations instead.\n- `frontend-design`: Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated defaults.\n- `gap-to-topic`: Turn a research area into a go/no-go decision dossier for ONE candidate thesis/proposal topic — a 3-gate verdict (is the gap open? is it a contribution? is it feasible?) with the evidence laid out so the researcher can verify it. Use when the user asks \"is this gap worth pursuing\", \"help me pick a thesis topic\", \"is this idea already taken\", \"find me a defensible research gap\", \"vet this research idea before I commit\", or \"should I do this\". NOT a literature review (use `literature-triage-mat...\n- `gc-minimal-zine-poster-v0-1`: Generate Minimal Zine Poster v0.1 poetic paper-poster prompts and the matching generated image. Use when the user gives a theme, sentence, object, mood, article idea, photo, or content brief and wants a quiet Japanese/Korean zine-like editorial poster with large negative space, aged paper texture, experimental typography, restrained color accents, and a generated bitmap image.\n- `grilling`: Grill the user relentlessly about a plan, decision, or idea. Use when the user wants to stress-test their thinking, or uses any 'grill' trigger phrases.\n- `grillme-workflow`: Use when implementing complex multi-step tasks that benefit from structured plan review, multi-model validation, and post-execution verification\n- `humanizer`: Remove signs of AI-generated writing from text. Use when editing or reviewing text to make it sound more natural and human-written. Based on Wikipedia's comprehensive \"Signs of AI writing\" guide. Detects and fixes patterns including: inflated symbolism, promotional language, superficial -ing analyses, vague attributions, em dash overuse, rule of three, AI vocabulary words, passive voice, negative parallelisms, and filler phrases.\n- `improve-animations`: Survey a codebase's animation and motion code as a senior motion advisor, then produce a prioritized audit and self-contained implementation plans for other agents (or cheaper models) to execute. Read-only on source code — it plans improvements, it does not apply them. Use when the user asks to \"improve the animations\", \"audit the motion\", \"make this app feel better\", or wants a roadmap of animation fixes rather than a review of a single diff.\n- `internal-comms`: A set of resources to help me write all kinds of internal communications, using the formats that my company likes to use. Claude should use this skill whenever asked to write some sort of internal communications (status reports, leadership updates, 3P updates, company newsletters, FAQs, incident reports, project updates, etc.).\n- `lark-approval`: 飞书审批：查询和处理审批待办/已办/实例，搜索可发起审批定义、查看定义详情并发起原生审批实例。当用户要处理审批任务、查看审批实例、搜索或发起审批时使用。审批待办不是飞书任务；非审批类待办走 lark-task。不负责创建审批定义；三方审批定义不走原生提单。\n- `lark-apps`: 妙搭（Spark/Miaoda）应用开发与托管：应用创建、本地全栈开发、云端生成迭代、创意设计（UI mockup / 可交互原型 / 线框图 / 落地页 / 仪表盘 / 幻灯片 deck / 视觉探索）、AI相关能力和飞书平台能力或者其他外部能力集成、日志/Trace/监控指标/PV/UV 查询、环境变量管理、应用角色与成员管理、自动化触发器（定时/记录变更/Webhook/飞书审批）。当用户要开发/新建一个系统·工具·平台·应用，或要本地开发 / 云端开发 / 修改 / 部署 / 发布 / 上线 / 拿可分享链接，或用 HTML 做页面·网站·部署到妙搭，或要设计 / design / mockup / prototype / wireframe / 做 PPT / deck / 视觉探索，或提到妙搭/Spark/Miaoda（应用运行时域名形如 *.aiforce.cloud）、应用数据库、应用文件存储、开放 API Key、可见范围、应用角色/角色成员、线上日志、接口请求量、错误量、延迟、访问量、环境变量、给妙搭应用配自动化任务/定时触发/审批通过后自动触发时使用。不负责...\n- `lark-attendance`: 飞书考勤打卡：查询自己的考勤打卡记录\n- `lark-base`: 飞书多维表格（Base）操作：建表、字段、记录、视图、统计、公式/lookup、表单、仪表盘、workflow、角色权限；遇到 Base/多维表格/bitable 或 /base/ 链接时使用。文件导入转 lark-drive，认证/授权转 lark-shared。\n- `lark-calendar`: 飞书日历：管理日历日程和会议室。查看/搜索日程、创建/更新日程、管理参会人、查询忙闲和推荐时段、预定会议室。当用户需要查看日程安排、创建/修改会议、查询/预定会议室时使用。不负责：查询过去的视频会议记录（走 lark-vc）、待办任务（走 lark-task）。\n- `lark-contact`: 飞书 / Lark 通讯录:按姓名 / 邮箱解析成 open_id,或按 open_id 反查姓名 / 部门 / 邮箱 / 联系方式 / 个人状态 / 签名。当用户提到某人姓名要下一步发消息 / 排日程,或拿到 open_id 想查具体信息时使用。不负责部门树遍历、按部门列员工、组织架构图,这类需求走原生 OpenAPI。\n- `lark-doc`: 飞书云文档（Docx / Wiki 文档）：读取和编辑飞书文档内容。当用户给出文档 URL 或 token，或需要查看、创建、编辑文档、插入或下载文档图片附件时使用。文档中嵌入的电子表格、多维表格、画板，先用本 skill 提取 token 再切到对应 skill。当用户给出 doubao.com 的 /docx/ 或 /wiki/ URL/token 时，也应直接使用本 skill；路由依据是 URL 路径模式和 token，而不是域名。不负责文档评论管理，也不负责表格或 Base 的数据操作。当用户明确要操作飞书思维笔记时，也使用本 skill。\n- `lark-drive`: 飞书云空间（云盘/云存储）：管理 Drive 文件和文件夹，包含上传/下载、创建文件夹、复制/移动/删除、查看元数据、评论/权限/订阅、标题、版本、飞书文档密级标签（secure labels）和本地文件导入。用户需要整理云盘目录、处理云空间资源 URL/token、判断链接类型/真实 token/标题，或导入 Word/Markdown/Excel/CSV/PPTX/.base 为 docx/sheet/bitable/slides 时使用；doubao.com 云空间 URL/token 也按资源路径和 token 路由，不回退 WebFetch。不负责：文档内容编辑（走 lark-doc）、表格/Base 表内数据操作（走 lark-sheets/lark-base）、知识空间节点/成员管理（走 lark-wiki）、原生 Markdown 文件读写/patch/diff（走 lark-markdown）。\n- `lark-event`: Lark/Feishu real-time event listening / subscribing / consuming: stream events as NDJSON via `lark-cli event consume &lt;EventKey&gt;` (covers IM messages/reactions/chat changes, Approval status changes, Task updates, VC meeting started/joined/ended, Minutes generated, Whiteboard updated, etc.). Use for Lark bots, real-time message processing, long-running subscribers, streaming webhook/push handlers. Supports `--max-events` / `--timeout` bounded runs and a stderr ready-marker contract — designed f...\n- `lark-im`: 飞书即时通讯：收发消息和管理群聊。发送和回复消息、搜索聊天记录、管理群聊成员、上传下载图片和文件（支持大文件分片下载）、管理表情回复、发送应用内/短信/电话加急、发送和处理交互卡片（Interactive Card）、监听卡片按钮回调（card.action.trigger）。当用户需要发消息、查看或搜索聊天记录、下载聊天中的文件、查看群成员、搜索群、创建群聊或话题群、管理标记数据、管理 Feed 置顶（添加/移除/查询置顶会话）、管理标签数据、处理卡片回调时使用。\n- `lark-mail`: 飞书邮箱：Use when user mentions 起草邮件、写邮件、草稿、发送/回复/转发邮件、查阅邮件、看邮件、搜索邮件、邮件文件夹、邮件标签、邮件联系人、监听新邮件、邮件收信规则等；use for mail/email intent only. Do not use for docs/sheets/calendar/auth setup/pure contact lookup/IM chat tasks.\n- `lark-markdown`: 飞书 Markdown：查看、创建、上传、编辑和比较 Markdown 文件。当用户需要创建或编辑 Markdown 文件、读取、修改、局部 patch 或比较差异时使用。不负责将 Markdown 导入为飞书在线文档，也不负责文件搜索、权限、评论、移动、删除等云空间管理操作。\n- `lark-minutes`: 飞书妙记：搜索妙记、查看妙记基础信息、下载/上传音视频、读取或编辑妙记的产物内容、改标题、替换说话人/关键词、申请妙记查看/编辑权限。当给出minute_token、本地音视频文件，要查/改/转妙记产物，或用户明确要主动申请妙记权限时使用；本地音视频转纪要/逐字稿优先走本 skill，不要用 ffmpeg/whisper 本地转写。不负责：获取会议关联妙记，或仅按自然语言标题定位纪要\n- `lark-note`: 飞书会议纪要（Note）直查：已知 note_id 时查询纪要详情、展示类型、关联文档 token，并读取 unified 原始逐字记录。当用户已持有 note_id，或从文档显式 vc-node-id 获得 note_id 时使用。不负责会议/日程/妙记定位、文档标题搜索或 Docx 正文读取。\n- `lark-okr`: 飞书 OKR：管理目标与关键结果。查看和编辑 OKR 周期、目标、关键结果、对齐关系、量化指标和进展记录。当用户需要查看或创建 OKR、管理目标和关键结果、查看对齐关系时使用。不负责：待办任务管理（lark-task）、日程/会议安排（lark-calendar）、绩效评估\n- `lark-openapi-explorer`: 飞书/Lark 原生 OpenAPI 探索：从官方文档库中挖掘未经 CLI 封装的原生 OpenAPI 接口。当用户的需求无法被现有 lark-* skill 或 lark-cli 已注册命令满足，需要查找并调用原生飞书 OpenAPI 时使用。\n- `lark-shared`: Use for lark-cli setup/auth tasks: auth login/status/logout, user vs bot identity, business-domain permissions (--domain, including all/docs/drive), missing scopes, revoking authorization, or handling _notice JSON.\n- `lark-sheets`: 飞书电子表格：创建和操作电子表格。支持创建表格、管理工作表与行列结构（增删/合并/调整尺寸/隐藏/冻结）、读写单元格（值/公式/样式/批注/单元格图片）、查找替换、多操作原子批量更新，以及图表、透视表、条件格式、筛选器、迷你图、浮动图片等对象的创建与维护。当用户需要创建电子表格、管理工作表、批量读写或编辑数据、统计汇总与可视化、表格美化、公式计算（含 Excel 公式迁移）、金融/财务建模（DCF、三张表、预算、Sensitivity 等）等任务时使用。若用户是想按名称或关键词搜索云空间（云盘/云存储）里的表格文件，请改用 lark-drive 的 drive +search 先定位资源。当用户给出 doubao.com 的 /sheets/ URL/token 时，也应直接使用本 skill，不要因为域名不是飞书而回退到 WebFetch；路由依据是 URL 路径模式和 token，而不是域名。\n- `lark-skill-maker`: 创建 lark-cli 的自定义 Skill。当用户需要把飞书 API 操作封装成可复用的 Skill（包装原子 API 或编排多步流程）时使用。\n- `lark-slides`: 飞书幻灯片：创建和编辑幻灯片。创建演示文稿、读取幻灯片内容、管理幻灯片页面（创建、删除、读取、局部替换）。当用户需要创建或编辑幻灯片、读取或修改单个页面时使用。当用户给出 doubao.com 的 /slides/ URL/token 时，也应直接使用本 skill，不要因为域名不是飞书而回退到 WebFetch；路由依据是 URL 路径模式和 token，而不是域名。不负责：云文档内容编辑（走 lark-doc）、云文档里的独立画板对象（走 lark-whiteboard）、上传或下载普通文件（走 lark-drive）。\n- `lark-task`: 飞书任务：管理任务、清单和任务智能体。创建待办任务、查看和更新任务状态、拆分子任务、组织任务清单、分配协作成员、上传任务附件、注册或注销任务智能体、更新任务智能体的主页数据、写入智能体任务记录。当用户需要创建待办事项、查看任务列表、跟踪任务进度、管理项目清单或给他人分配任务、为任务上传附件文件、注册注销任务智能体、更新智能体主页数据、写入任务记录时使用。\n- `lark-vc`: 飞书视频会议：搜索历史会议记录、查询会议纪要（总结/待办/章节/逐字稿）、查询参会人快照。当用户查询已结束的会议、获取会议产物（纪要/妙记）、查看参会人时使用；查询未来日程走 lark-calendar。不负责：Agent 真实入会/离会、会中实时事件（走 lark-vc-agent）。\n- `lark-vc-agent`: 飞书视频会议会中能力：用于让应用机器人真实加入或离开正在进行的会议，并读取当前身份可见的会中事件、发送会中文本消息或会中表情。适用于用户询问正在开的会议发生了什么、谁在发言、是否共享内容，或需要发现当前可读的进行中会议 ID。不负责已结束会议搜索、参会人快照、纪要、逐字稿或录制查询，这些使用 lark-vc 技能。\n- `lark-whiteboard`: 飞书画板：查询和编辑飞书云文档中的画板。支持导出画板为预览图片、导出原始节点结构、使用多种格式更新画板内容。 当用户需要查看画板内容、导出画板图片、编辑画板时使用此 skill。不负责：飞书云文档内容编辑（lark-doc）、文档内嵌电子表格/Base（lark-sheets / lark-base）。\n- `lark-whiteboard-bindao`: 画板画图 skill。覆盖端到端流程：审美判断 → SVG 创作 → 渲染审查 → 写入飞书画板。 核心是审美标准（高于一切技术约束），技术流程基于 lark-whiteboard skill 的 SVG 路径。 触发：任何需要画图/画框架/画流程/可视化的场景。\n- `lark-wiki`: 飞书知识库：管理知识空间、空间成员和文档节点。创建和查询知识空间、查看和管理空间成员、管理节点层级结构、在知识库中组织文档和快捷方式。当用户需要在知识库中查找或创建文档、浏览知识空间结构、查看或管理空间成员、移动或复制节点时使用。当用户给出 doubao.com 的 /wiki/ URL/token 时，也应直接使用本 skill，不要因为域名不是飞书而回退到 WebFetch；路由依据是 URL 路径模式和 token，而不是域名。不负责：上传文件到知识库节点下（走 lark-drive）、编辑文档/表格/Base 内容（走 lark-doc / lark-sheets / lark-base）。\n- `lark-workflow-meeting-summary`: 会议纪要整理工作流：汇总指定时间范围内的会议纪要并生成结构化报告。当用户需要整理会议纪要、生成会议周报、回顾一段时间内的会议内容时使用。\n- `lark-workflow-standup-report`: 日程待办摘要：编排 calendar +agenda 和 task +get-my-tasks，生成指定日期的日程与未完成任务摘要。适用于了解今天/明天/本周的安排。\n- `latent-briefing`: This skill should be used when the user asks to \"share memory between agents\", \"KV cache compaction for multi-agent\", \"orchestrator worker context\", \"latent briefing\", \"reduce worker tokens\", \"cross-agent memory without summarization\", or discusses Attention Matching compaction, recursive language models with workers, or token explosion in hierarchical agents.\n- `literature-triage-matrix`: Turn a list of papers (Zotero collection, Obsidian cluster, manual list) into a compact comparison matrix written to .research/literature_matrix.md, instead of generic per-paper summaries. Use when the user asks to \"make a literature matrix\", \"compare these papers by method/data/limitations\", or \"decide which papers are central to my review\". If the user says \"extract the claims from these papers\": cross-paper comparison matrix → this skill; claims from their own manuscript draft → `paper-mem...\n- `mcp-builder`: Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).\n- `memory-systems`: This skill should be used for persistent semantic memory in agent systems: cross-session knowledge retention, entity tracking, temporal validity, graph or vector retrieval, memory consolidation, and memory benchmark selection. Route file-backed scratchpads to filesystem-context, handoff summaries to context-compression, and token-efficiency tactics to context-optimization.\n- `multi-agent-patterns`: This skill should be used when designing multi-agent systems that need context isolation, supervisor or swarm coordination, explicit handoffs, parallel execution, or a decision on whether multiple agents are justified.\n- `notebooklm-brief-verifier`: Compare a downloaded NotebookLM brief against the source bundle research-hub uploaded, and report missed sources, unsupported claims, contradictions, and recommended follow-up prompts. Use when the user asks to \"verify this NotebookLM brief\", \"check if the brief missed anything\", or \"compare downloaded notes to the cluster papers\".\n- `paper-memory-builder`: Convert a paper draft + figures + Zotero metadata into reusable .paper/claims.yml and .paper/figures.yml files so the academic-writing-skills skill can do writing, revision, and audit passes without re-reading the manuscript every time. Use when the user asks to \"build paper memory\", \"extract claims from this manuscript\", \"extract claims, supporting evidence, and figure key numbers\", or \"prepare this paper for AI-assisted writing\". NOT for summarizing cited papers in a literature cluster — th...\n- `paper-summarize`: After research-hub ingests a cluster of cited papers, fill the per-paper Key Findings + Methodology + Relevance sections in BOTH Obsidian markdown and the Zotero child note. Use when the user says \"fill the TODO Key Findings/Methodology blocks left by research-hub auto\", \"I just ran auto and don't know what these papers are about\", or \"summarize the papers in cluster X\". Invokes a supported LLM CLI on each paper's abstract. NOT for summarizing the user's own manuscript draft — that's `paper-m...\n- `pdf`: Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and OCR on scanned PDFs to make them searchable. If the user mentions a .pdf file or asks to produce one, use this skill.\n- `pptx`: Use this skill any time a .pptx file is involved in any way — as input, output, or both. This includes: creating slide decks, pitch decks, or presentations; reading, parsing, or extracting text from any .pptx file (even if the extracted content will be used elsewhere, like in an email or summary); editing, modifying, or updating existing presentations; combining or splitting slide files; working with templates, layouts, speaker notes, or comments. Trigger whenever the user mentions \"deck,\" \"s...\n- `prototype`: Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model or logic feels right, or explore what a UI should look like.\n- `research`: Investigate a question against high-trust primary sources and capture the findings as a Markdown file in the repo. Use when the user wants a topic researched, docs or API facts gathered, or reading legwork delegated to a background agent.\n- `research-add-fields`: 向现有调研outline补充字段定义。\n- `research-add-items`: 向现有调研outline补充items（调研对象）。\n- `research-chapter-ops`: Use when beginning work on a thesis chapter — creates and maintains the Chapter Operations Document (OPS file) with structure, decisions, error triggers, and cross-section conventions. Triggers on 'new chapter', 'chapter operations', 'OPS file', 'chapter setup', 'chapter-level coordination'.\n- `research-citation-management`: Use when managing citations in thesis writing — three-pipeline system for gap analysis, verification, and programmatic insertion with dual-AI cross-verification. Triggers on 'add citations', 'citation gaps', 'verify references', 'insert citations', 'reference management', 'bibliography'.\n- `research-context-compressor`: Inspect a research repository and write a compact `.research/` workspace manifest (project_manifest.yml, experiment_matrix.yml, data_dictionary.yml) so future AI sessions can orient themselves without rescanning the whole repo. Use when the user asks to \"compress this project context\", \"create a research manifest\", or \"save the project context for future agents\".\n- `research-deep`: 读取调研outline，为每个item启动独立agent进行深度调研。禁用job output。\n- `research-design-helper`: Guide a researcher through 5 Socratic segments — research question sharpening, expected mechanism, identifiability check, validation plan, risk register — and produce `.research/design_brief.md`. Use when the user asks to \"frame this research question\", \"design my study\", \"help me think through what model to build\", \"sharpen my hypothesis\", \"is my research question sharp enough to be falsifiable?\", or \"before I start coding, walk me through the design\". Runs AFTER a topic is chosen — it desig...\n- `research-error-log`: Use when creating, structuring, or extending the project Error Log (`CLAUDE_ERROR_LOG.md` / `CLAUDE_ERROR_LOG_V2.md`) — defines the dual-track archive/active format, three-layer V2 architecture, pattern entry schema, add-new-pattern protocol, and how postmortem / brief / review skills interface with it. Triggers on 'error log', 'new error pattern', 'add pattern to log', 'set up error log', 'V2 checklist', 'CLAUDE_ERROR_LOG', 'how does the error log work'.\n- `research-figure-generation`: Use when creating publication-quality figures for thesis — pipeline from raw data through verification, generation, researcher review, to Word document integration. Triggers on 'create figure', 'plot data', 'generate figure', 'thesis figures', 'insert figures into Word'.\n- `research-gemini-review`: Use after Claude writes any thesis prose draft — invokes Gemini API as an independent cross-model critic to eliminate self-preference bias. REQUIRED after research-writing-brief produces prose and before research-three-stage-review can be considered final. Triggers on 'review this draft', 'cross-model review', 'Gemini check', 'independent review of thesis prose'.\n- `research-hub`: Operate research-hub workflows for literature discovery, source ingest into Zotero/Obsidian/NotebookLM, dashboard inspection, and vault maintenance. Use when the user asks to find papers and organize them, build a knowledge base, ingest a folder of PDFs, upload to NotebookLM, generate research briefs, inspect clusters, or maintain a research vault. NOT for auditing or cleaning up an existing Zotero library — that's `zotero-library-curator` (read-only audit) plus `zotero-skills` (for CRUD).\n- `research-hub-multi-ai`: Research-domain router that writes `.coord/multi_ai_plan.md` when a single round of work will need two or more delegates AND the work touches research-hub artifacts (`.research/`, `.paper/`, Zotero/Obsidian/NotebookLM pipelines). For a single delegate, use `codex-delegate` or `gemini-delegate` directly — do not invoke this skill. For generic non-research multi-agent decomposition (pure code refactor, generic translation, no research-hub artifact), use `agent-collab-workspace:agent-task-splitt...\n- `research-paper-adaptation`: Use when converting a published paper (where researcher is author) into a thesis chapter — adaptation protocol with side-by-side verification and change classification. Triggers on 'adapt paper', 'paper to thesis', 'convert publication', 'published paper chapter', 'adapt manuscript'.\n- `research-postmortem`: Use when a thesis draft is rejected and must be rewritten from scratch — structured 5-part investigation into process failure with root cause analysis and systemic action items. Triggers on 'draft rejected', 'rewrite from scratch', 'writing failure', 'postmortem', 'what went wrong with the draft'.\n- `research-pre-writing-discussion`: Use before creating a Writing Brief for any thesis section — structured interview to extract researcher's knowledge, judgments, and decisions through three phases. Triggers on 'discuss section', 'plan what to write', 'pre-writing discussion', 'before writing brief', 'extract knowledge for section'.\n- `research-project-orienter`: Read the .research/ manifest files at a project root and produce a single orientation memo (research question, datasets, current stage, key entrypoints, evidence artifacts, open questions). Use when the user asks to \"orient me in this project\", \"what is this repo about\", or \"build a context map for this paper\" — and the project already has .research/ manifests (or trigger research-context-compressor first).\n- `research-report`: 将deep调研结果汇总为markdown报告，覆盖所有字段，跳过不确定值。\n- `research-session-management`: Use when starting or ending any thesis writing session — manages INDEX files, handoff documents, and startup/shutdown protocols for cross-session continuity. Triggers on 'new thesis session', 'session handoff', 'continue thesis work', 'pick up where left off', 'end session'.\n- `research-style-audit`: Use after completing any thesis section draft — runs programmatic style audit to catch Pattern\n- `research-task-file`: Use when creating self-contained task files for autonomous AI agent execution — goal-oriented instructions with context, decision frameworks, and validation criteria. Triggers on 'create task file', 'autonomous task', 'agent task', 'data extraction task', 'TASK file', 'batch processing task'.\n- `research-three-stage-review`: Use after completing a thesis prose draft — runs three independent review stages with different perspectives and information access. Triggers on 'review draft', 'check section', 'draft review', 'quality check', 'before sending to advisor'.\n- `research-writing`: Use when starting any academic thesis or dissertation writing task — routes to the correct thesis sub-skill based on the current phase of work. Triggers on 'thesis', 'dissertation', 'chapter writing', 'section writing', 'defense prep', 'academic writing with AI'.\n- `research-writing-brief`: Use when planning any thesis section before writing prose — creates a Writing Brief with boundary rules, internalization check, verified data table, and paragraph-level outline with argumentative purposes. Triggers on 'plan section', 'write section X.Y', 'prepare to write', 'writing brief', 'section outline'.\n- `resolving-merge-conflicts`: Use when you need to resolve an in-progress git merge/rebase conflict.\n- `sandbox-sdk`: Build sandboxed applications for secure code execution. Load when building AI code execution, code interpreters, CI/CD systems, interactive dev environments, or executing untrusted code. Covers Sandbox SDK lifecycle, commands, files, code interpreter, and preview URLs. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `scheduled-task-planner`: 分析定时任务需求，确定最优部署方案（Cloudflare Worker 或本地 launchd）\n- `sequential-thinking`: Structured reflective problem-solving methodology. Process: decompose, analyze, hypothesize, verify, revise. Capabilities: complex problem decomposition, adaptive planning, course correction, hypothesis verification, multi-step analysis. Actions: decompose, analyze, plan, revise, verify solutions step-by-step. Keywords: sequential thinking, problem decomposition, multi-step analysis, hypothesis verification, adaptive planning, course correction, reflective thinking, step-by-step, thought sequ...\n- `skill-creator`: Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.\n- `slack-gif-creator`: Knowledge and utilities for creating animated GIFs optimized for Slack. Provides constraints, validation tools, and animation concepts. Use when users request animated GIFs for Slack like \"make me a GIF of X doing Y for Slack.\"\n- `tdd`: Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions \"red-green-refactor\", or wants integration tests.\n- `test`: Test features before users find bugs. Use when feature is built, before deploying, or when bugs reported. Covers manual testing, edge cases, cross-browser testing, and testing checklists for non-technical founders.\n- `theme-factory`: Toolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc. There are 10 pre-set themes with colors/fonts that you can apply to any artifact that has been creating, or can generate a new theme on-the-fly.\n- `turnstile-spin`: Set up Cloudflare Turnstile end-to-end in a project — scan the codebase, create the widget via the Cloudflare API, deploy the managed siteverify Worker, write the frontend snippets, validate, and persist the skill. Load this when a user asks to add Turnstile, set up CAPTCHA, protect a form from bots, or fix a Turnstile integration. Mirrors developers.cloudflare.com/turnstile/spin.\n- `web-artifacts-builder`: Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.\n- `web-perf`: Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (LCP, INP, CLS) and supplementary metrics (FCP, TBT, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge.\n- `webapp-testing`: Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.\n- `workers-best-practices`: Reviews and authors Cloudflare Workers code against production best practices. Load when writing new Workers, reviewing Worker code, configuring wrangler.jsonc, or checking for common Workers anti-patterns (streaming, floating promises, global state, secrets, bindings, observability). Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `wrangler`: Cloudflare Workers CLI for deploying, developing, and managing Workers, KV, R2, D1, Vectorize, Hyperdrive, Workers AI, Containers, Queues, Workflows, Pipelines, and Secrets Store. Load before running wrangler commands to ensure correct syntax and best practices. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `xlsx`: Use this skill any time a spreadsheet file is the primary input or output. 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Includ...\n</available_skills>\n\nIf the user names a skill, or the task clearly matches a skill's description, call the `skill` tool with the exact skill name before taking task actions. Load all applicable skills, then follow their full instructions. This catalog contains summaries only; do not infer or follow a skill's instructions until it has been loaded.\n</system-reminder>"}],"source":{"kind":"plugin","plugin":"dsh-tool-skill"},"role":"user","id":"6b1b6917-597d-4f0d-a19f-0cafb527556c"},"surfaceOp":"append"}
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-{"type":"assistant/message","seq":810,"time":1785421245577,"data":{"turn":4,"step":4,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The file was created and its contents are verified: \"POLICY_NEUTRAL_OK\". Task complete."},{"type":"text","text":"Done — **policy-neutral.txt** was created (via workspace-write escalation) and verified to contain exactly `POLICY_NEUTRAL_OK`."}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"c51d0a14-ba25-42eb-ba6b-8ea4eff18216"},"usage":{"inputTokens":211,"outputTokens":53,"cacheReadTokens":15872,"reasoningTokens":22}},"sourceEventSeqs":[752,753,754,755,756,757,758,759,760,761,762,763,764,765,766,767,768,769,770,771,772,773,774,775,776,777,778,779,780,781,782,783,784,785,786,787,788,789,790,791,792,793,794,795,796,797,798,799,800,801,802,803,804,805,806,807,808,809],"surfaceOp":"append"}
-{"type":"step/end","seq":811,"time":1785421245578,"data":{"turn":4,"step":4}}
-{"type":"turn/end","seq":812,"time":1785421245578,"data":{"turn":4,"reason":{"kind":"completed"}}}
+{"type":"command/run","data":{"commandId":"cmd-56ed2b36-1","name":"permission","args":" read-only","source":{"kind":"user"}}}
+{"type":"permission/preset","data":{"preset":"read-only"}}
+{"type":"sandbox/mode","data":{"mode":"read-only"}}
+{"type":"approval/policy","data":{"policy":"ask"}}
+{"type":"command/done","data":{"commandId":"cmd-56ed2b36-1","kind":"success","text":"Permission preset: read-only."}}
+{"type":"turn/start","data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Can you create or edit a normal file right now under the current policy? Answer directly in one sentence. Do not call a tool just to discover the policy."}],"source":{"kind":"user","rpcId":"{{rpcId}}"},"role":"user","id":"93b20d7f-b280-4a61-8ae4-66764f8a541e"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Can you create or edit","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<system-reminder>\nA skill is a reusable set of task-specific instructions. The following skills are available in this session:\n\n<available_skills>\n- `15-05-premortem`: Use before starting risky work — rebases, large refactors, multi-file migrations, or deploys — to identify failure modes and mitigations in advance.\n- `acceptance-criteria`: 检查Acceptance Criteria格式和完整性，验证是否符合Given-When-Then结构、覆盖正常流程/边界条件/异常场景。适合在为User Story编写AC后、准备测试用例前使用，当需要验收AC质量时。帮助不熟悉BDD的PM/BA确保AC明确、可测试、覆盖完整，避免遗漏关键场景。\n- `agents-sdk`: Build AI agents on Cloudflare Workers using the Agents SDK. Load when creating stateful agents, durable workflows, real-time WebSocket apps, scheduled tasks, MCP servers, chat applications, voice agents, or browser automation. Covers Agent class, state management, callable RPC, Workflows, durable execution, queues, retries, observability, and React hooks. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `aico-pm-user-story-writing`: Transform requirements into well-structured User Stories using \"As a [user], I want [goal], So that [benefit]\" format with Given/When/Then acceptance criteria. Use this skill when: - User asks to \"write user story\", \"create story\", \"add story\" - User mentions \"user story\", \"backlog item\", \"story\" - Running /pm.plan and need to break PRD into implementable stories - Creating backlog items for development team - Need to formalize a requirement into standard story format - Converting feature req...\n- `algorithmic-art`: Creating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users request creating art using code, generative art, algorithmic art, flow fields, or particle systems. Create original algorithmic art rather than copying existing artists' work to avoid copyright violations.\n- `animation-vocabulary`: Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term (\"the bouncy thing when a popover opens\" → Pop in; \"the iOS rubber-band scroll\" → Rubber-banding). Use when the user asks \"what's it called when…\", or describes a motion effect without knowing its name and wants the right word to prompt an AI or designer with. For naming an effect, not designing or building one.\n- `app-comprehensive-test-generator`: Generate exhaustive user-flow and edge-case test scenarios from an app's codebase, produce scenario .md files, execute tests using connected or newly created MCPs, and produce an app.qa.report.md summarizing failures and suggested fixes.\n- `apple-design`: Apple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking, leading), reduced-motion, or the design foundations (feedback, spatial consistency, restraint) behind Apple-style interfaces.\n- `brainstorming`: You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.\n- `brand-guidelines`: Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply.\n- `canvas-design`: Create beautiful visual art in .png and .pdf documents using design philosophy. You should use this skill when the user asks to create a poster, piece of art, design, or other static piece. Create original visual designs, never copying existing artists' work to avoid copyright violations.\n- `claude-api`: Reference for the Claude API / Anthropic SDK — model ids, pricing, params, streaming, tool use, MCP, agents, caching, token counting, model migration. TRIGGER — read BEFORE opening the target file; don't skip because it \"looks like a one-liner\" — whenever: the prompt names Claude/Anthropic in any form (Claude, Anthropic, Fable, Opus, Sonnet, Haiku, `anthropic`, `@anthropic-ai`, `claude-*`, `us.anthropic.*`, `[1m]`); the user asks about an LLM (pricing/model choice/limits/caching) — never answ...\n- `cloudflare`: Comprehensive Cloudflare platform skill covering Workers, Pages, storage (KV, D1, R2), AI (Workers AI, Vectorize, Agents SDK), feature flags (Flagship), networking (Tunnel, Spectrum), security (WAF, DDoS), and infrastructure-as-code (Terraform, Pulumi). Use for any Cloudflare development task. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `cloudflare-email-service`: Send and receive transactional emails with Cloudflare Email Service (Email Sending + Email Routing). Use when building email sending (Workers binding or REST API), email routing, Agents SDK email handling, or integrating email into any app — Workers, Node.js, Python, Go, etc. Also use for email deliverability, SPF/DKIM/DMARC, wrangler email setup, MCP email tools, or when a coding agent needs to send emails. Even for simple requests like \"add email to my Worker\" — this skill has critical conf...\n- `cloudflare-one`: Guides Cloudflare One Zero Trust and SASE work across Access, Gateway, WARP, Tunnel, Cloudflare WAN, DLP, CASB, device posture, and identity. Use when designing, configuring, troubleshooting, or reviewing Cloudflare One deployments. Retrieval-first: use current Cloudflare docs/API schemas instead of embedded product docs.\n- `cloudflare-one-migrations`: Plans migrations from Zscaler ZIA/ZPA, Palo Alto, legacy VPN, SWG, or SASE stacks to Cloudflare One. Use for migration assessments, policy mapping, rollout plans, and parity/gap analysis.\n- `code-review`: Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes — Standards (does the code follow this repo's documented coding standards?) and Spec (does the code match what the originating issue/PRD asked for?). Runs both reviews in parallel sub-agents and reports them side by side. Use when the user wants to review a branch, a PR, work-in-progress changes, or asks to \"review since X\".\n- `codebase-design`: Shared vocabulary for designing deep modules. Use when the user wants to design or improve a module's interface, find deepening opportunities, decide where a seam goes, make code more testable or AI-navigable, or when another skill needs the deep-module vocabulary.\n- `content-refiner`: Refine verbose educational content by eliminating redundancy, tightening prose, and strengthening lesson connections. Use when content is wordy, repetitive, or lacks narrative flow between sections.\n- `context-compression`: This skill should be used when long-running agent sessions need context compression, structured summarization, compaction, token-per-task optimization, or durable handoff summaries that preserve decisions, files, risks, and next actions.\n- `create-feishu-doc`: Create a Feishu document and grant edit permissions to the user. Use when asked to write content to Feishu or create a document in a wiki space.\n- `design-compass`: Use when doing any product or UI design work — brainstorming a feature, starting a visual/interaction direction, reviewing half-built UI, or final-checking before ship; also when unsure which design skill applies. 产品设计 / 界面设计 / 交互设计 / UI review / 脑暴 / 视觉方向 / 设计验收时使用。\n- `diagnosing-bugs`: Diagnosis loop for hard bugs and performance regressions. Use when the user says \"diagnose\"/\"debug this\", or reports something broken/throwing/failing/slow.\n- `doc-coauthoring`: Guide users through a structured workflow for co-authoring documentation. Use when user wants to write documentation, proposals, technical specs, decision docs, or similar structured content. This workflow helps users efficiently transfer context, refine content through iteration, and verify the doc works for readers. Trigger when user mentions writing docs, creating proposals, drafting specs, or similar documentation tasks.\n- `docx`: Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. When Claude needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4) Adding comments, or any other document tasks\n- `domain-modeling`: Build and sharpen a project's domain model. Use when the user wants to pin down domain terminology or a ubiquitous language, record an architectural decision, or when another skill needs to maintain the domain model.\n- `durable-objects`: Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `ego-browser`: ego-browser (ego-lite) is a Chromium-based browser designed from the ground up to be friendly to both human users and AI Agents. AI Agents work in their own isolated space, reusing the user's login state without competing for the browser. Use this skill whenever the user needs to interact with a website opening pages, filling forms, clicking buttons, taking screenshots, extracting page data, testing web apps, logging into sites, automating browser operations, or any other browser automation t...\n- `emil-design-eng`: This skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great.\n- `feishu-workflow`: 飞书文档全流程管理 — 搜索、创建、编辑 wiki 文档，支持内容排版、表格、代码块、白板\n- `find-animation-opportunities`: Search a codebase or UI for places that don't animate but should, and reject everything that shouldn't. Read-only; it proposes motion with exact values, it does not implement it. Use when the user asks \"what could be animated here?\" or wants to \"make this feel more alive\". For fixing existing animations, use improve-animations or review-animations instead.\n- `frontend-design`: Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated defaults.\n- `gap-to-topic`: Turn a research area into a go/no-go decision dossier for ONE candidate thesis/proposal topic — a 3-gate verdict (is the gap open? is it a contribution? is it feasible?) with the evidence laid out so the researcher can verify it. Use when the user asks \"is this gap worth pursuing\", \"help me pick a thesis topic\", \"is this idea already taken\", \"find me a defensible research gap\", \"vet this research idea before I commit\", or \"should I do this\". NOT a literature review (use `literature-triage-mat...\n- `gc-minimal-zine-poster-v0-1`: Generate Minimal Zine Poster v0.1 poetic paper-poster prompts and the matching generated image. Use when the user gives a theme, sentence, object, mood, article idea, photo, or content brief and wants a quiet Japanese/Korean zine-like editorial poster with large negative space, aged paper texture, experimental typography, restrained color accents, and a generated bitmap image.\n- `grilling`: Grill the user relentlessly about a plan, decision, or idea. Use when the user wants to stress-test their thinking, or uses any 'grill' trigger phrases.\n- `grillme-workflow`: Use when implementing complex multi-step tasks that benefit from structured plan review, multi-model validation, and post-execution verification\n- `humanizer`: Remove signs of AI-generated writing from text. Use when editing or reviewing text to make it sound more natural and human-written. Based on Wikipedia's comprehensive \"Signs of AI writing\" guide. Detects and fixes patterns including: inflated symbolism, promotional language, superficial -ing analyses, vague attributions, em dash overuse, rule of three, AI vocabulary words, passive voice, negative parallelisms, and filler phrases.\n- `improve-animations`: Survey a codebase's animation and motion code as a senior motion advisor, then produce a prioritized audit and self-contained implementation plans for other agents (or cheaper models) to execute. Read-only on source code — it plans improvements, it does not apply them. Use when the user asks to \"improve the animations\", \"audit the motion\", \"make this app feel better\", or wants a roadmap of animation fixes rather than a review of a single diff.\n- `internal-comms`: A set of resources to help me write all kinds of internal communications, using the formats that my company likes to use. Claude should use this skill whenever asked to write some sort of internal communications (status reports, leadership updates, 3P updates, company newsletters, FAQs, incident reports, project updates, etc.).\n- `lark-approval`: 飞书审批：查询和处理审批待办/已办/实例，搜索可发起审批定义、查看定义详情并发起原生审批实例。当用户要处理审批任务、查看审批实例、搜索或发起审批时使用。审批待办不是飞书任务；非审批类待办走 lark-task。不负责创建审批定义；三方审批定义不走原生提单。\n- `lark-apps`: 妙搭（Spark/Miaoda）应用开发与托管：应用创建、本地全栈开发、云端生成迭代、创意设计（UI mockup / 可交互原型 / 线框图 / 落地页 / 仪表盘 / 幻灯片 deck / 视觉探索）、AI相关能力和飞书平台能力或者其他外部能力集成、日志/Trace/监控指标/PV/UV 查询、环境变量管理、应用角色与成员管理、自动化触发器（定时/记录变更/Webhook/飞书审批）。当用户要开发/新建一个系统·工具·平台·应用，或要本地开发 / 云端开发 / 修改 / 部署 / 发布 / 上线 / 拿可分享链接，或用 HTML 做页面·网站·部署到妙搭，或要设计 / design / mockup / prototype / wireframe / 做 PPT / deck / 视觉探索，或提到妙搭/Spark/Miaoda（应用运行时域名形如 *.aiforce.cloud）、应用数据库、应用文件存储、开放 API Key、可见范围、应用角色/角色成员、线上日志、接口请求量、错误量、延迟、访问量、环境变量、给妙搭应用配自动化任务/定时触发/审批通过后自动触发时使用。不负责...\n- `lark-attendance`: 飞书考勤打卡：查询自己的考勤打卡记录\n- `lark-base`: 飞书多维表格（Base）操作：建表、字段、记录、视图、统计、公式/lookup、表单、仪表盘、workflow、角色权限；遇到 Base/多维表格/bitable 或 /base/ 链接时使用。文件导入转 lark-drive，认证/授权转 lark-shared。\n- `lark-calendar`: 飞书日历：管理日历日程和会议室。查看/搜索日程、创建/更新日程、管理参会人、查询忙闲和推荐时段、预定会议室。当用户需要查看日程安排、创建/修改会议、查询/预定会议室时使用。不负责：查询过去的视频会议记录（走 lark-vc）、待办任务（走 lark-task）。\n- `lark-contact`: 飞书 / Lark 通讯录:按姓名 / 邮箱解析成 open_id,或按 open_id 反查姓名 / 部门 / 邮箱 / 联系方式 / 个人状态 / 签名。当用户提到某人姓名要下一步发消息 / 排日程,或拿到 open_id 想查具体信息时使用。不负责部门树遍历、按部门列员工、组织架构图,这类需求走原生 OpenAPI。\n- `lark-doc`: 飞书云文档（Docx / Wiki 文档）：读取和编辑飞书文档内容。当用户给出文档 URL 或 token，或需要查看、创建、编辑文档、插入或下载文档图片附件时使用。文档中嵌入的电子表格、多维表格、画板，先用本 skill 提取 token 再切到对应 skill。当用户给出 doubao.com 的 /docx/ 或 /wiki/ URL/token 时，也应直接使用本 skill；路由依据是 URL 路径模式和 token，而不是域名。不负责文档评论管理，也不负责表格或 Base 的数据操作。当用户明确要操作飞书思维笔记时，也使用本 skill。\n- `lark-drive`: 飞书云空间（云盘/云存储）：管理 Drive 文件和文件夹，包含上传/下载、创建文件夹、复制/移动/删除、查看元数据、评论/权限/订阅、标题、版本、飞书文档密级标签（secure labels）和本地文件导入。用户需要整理云盘目录、处理云空间资源 URL/token、判断链接类型/真实 token/标题，或导入 Word/Markdown/Excel/CSV/PPTX/.base 为 docx/sheet/bitable/slides 时使用；doubao.com 云空间 URL/token 也按资源路径和 token 路由，不回退 WebFetch。不负责：文档内容编辑（走 lark-doc）、表格/Base 表内数据操作（走 lark-sheets/lark-base）、知识空间节点/成员管理（走 lark-wiki）、原生 Markdown 文件读写/patch/diff（走 lark-markdown）。\n- `lark-event`: Lark/Feishu real-time event listening / subscribing / consuming: stream events as NDJSON via `lark-cli event consume &lt;EventKey&gt;` (covers IM messages/reactions/chat changes, Approval status changes, Task updates, VC meeting started/joined/ended, Minutes generated, Whiteboard updated, etc.). Use for Lark bots, real-time message processing, long-running subscribers, streaming webhook/push handlers. Supports `--max-events` / `--timeout` bounded runs and a stderr ready-marker contract — designed f...\n- `lark-im`: 飞书即时通讯：收发消息和管理群聊。发送和回复消息、搜索聊天记录、管理群聊成员、上传下载图片和文件（支持大文件分片下载）、管理表情回复、发送应用内/短信/电话加急、发送和处理交互卡片（Interactive Card）、监听卡片按钮回调（card.action.trigger）。当用户需要发消息、查看或搜索聊天记录、下载聊天中的文件、查看群成员、搜索群、创建群聊或话题群、管理标记数据、管理 Feed 置顶（添加/移除/查询置顶会话）、管理标签数据、处理卡片回调时使用。\n- `lark-mail`: 飞书邮箱：Use when user mentions 起草邮件、写邮件、草稿、发送/回复/转发邮件、查阅邮件、看邮件、搜索邮件、邮件文件夹、邮件标签、邮件联系人、监听新邮件、邮件收信规则等；use for mail/email intent only. Do not use for docs/sheets/calendar/auth setup/pure contact lookup/IM chat tasks.\n- `lark-markdown`: 飞书 Markdown：查看、创建、上传、编辑和比较 Markdown 文件。当用户需要创建或编辑 Markdown 文件、读取、修改、局部 patch 或比较差异时使用。不负责将 Markdown 导入为飞书在线文档，也不负责文件搜索、权限、评论、移动、删除等云空间管理操作。\n- `lark-minutes`: 飞书妙记：搜索妙记、查看妙记基础信息、下载/上传音视频、读取或编辑妙记的产物内容、改标题、替换说话人/关键词、申请妙记查看/编辑权限。当给出minute_token、本地音视频文件，要查/改/转妙记产物，或用户明确要主动申请妙记权限时使用；本地音视频转纪要/逐字稿优先走本 skill，不要用 ffmpeg/whisper 本地转写。不负责：获取会议关联妙记，或仅按自然语言标题定位纪要\n- `lark-note`: 飞书会议纪要（Note）直查：已知 note_id 时查询纪要详情、展示类型、关联文档 token，并读取 unified 原始逐字记录。当用户已持有 note_id，或从文档显式 vc-node-id 获得 note_id 时使用。不负责会议/日程/妙记定位、文档标题搜索或 Docx 正文读取。\n- `lark-okr`: 飞书 OKR：管理目标与关键结果。查看和编辑 OKR 周期、目标、关键结果、对齐关系、量化指标和进展记录。当用户需要查看或创建 OKR、管理目标和关键结果、查看对齐关系时使用。不负责：待办任务管理（lark-task）、日程/会议安排（lark-calendar）、绩效评估\n- `lark-openapi-explorer`: 飞书/Lark 原生 OpenAPI 探索：从官方文档库中挖掘未经 CLI 封装的原生 OpenAPI 接口。当用户的需求无法被现有 lark-* skill 或 lark-cli 已注册命令满足，需要查找并调用原生飞书 OpenAPI 时使用。\n- `lark-shared`: Use for lark-cli setup/auth tasks: auth login/status/logout, user vs bot identity, business-domain permissions (--domain, including all/docs/drive), missing scopes, revoking authorization, or handling _notice JSON.\n- `lark-sheets`: 飞书电子表格：创建和操作电子表格。支持创建表格、管理工作表与行列结构（增删/合并/调整尺寸/隐藏/冻结）、读写单元格（值/公式/样式/批注/单元格图片）、查找替换、多操作原子批量更新，以及图表、透视表、条件格式、筛选器、迷你图、浮动图片等对象的创建与维护。当用户需要创建电子表格、管理工作表、批量读写或编辑数据、统计汇总与可视化、表格美化、公式计算（含 Excel 公式迁移）、金融/财务建模（DCF、三张表、预算、Sensitivity 等）等任务时使用。若用户是想按名称或关键词搜索云空间（云盘/云存储）里的表格文件，请改用 lark-drive 的 drive +search 先定位资源。当用户给出 doubao.com 的 /sheets/ URL/token 时，也应直接使用本 skill，不要因为域名不是飞书而回退到 WebFetch；路由依据是 URL 路径模式和 token，而不是域名。\n- `lark-skill-maker`: 创建 lark-cli 的自定义 Skill。当用户需要把飞书 API 操作封装成可复用的 Skill（包装原子 API 或编排多步流程）时使用。\n- `lark-slides`: 飞书幻灯片：创建和编辑幻灯片。创建演示文稿、读取幻灯片内容、管理幻灯片页面（创建、删除、读取、局部替换）。当用户需要创建或编辑幻灯片、读取或修改单个页面时使用。当用户给出 doubao.com 的 /slides/ URL/token 时，也应直接使用本 skill，不要因为域名不是飞书而回退到 WebFetch；路由依据是 URL 路径模式和 token，而不是域名。不负责：云文档内容编辑（走 lark-doc）、云文档里的独立画板对象（走 lark-whiteboard）、上传或下载普通文件（走 lark-drive）。\n- `lark-task`: 飞书任务：管理任务、清单和任务智能体。创建待办任务、查看和更新任务状态、拆分子任务、组织任务清单、分配协作成员、上传任务附件、注册或注销任务智能体、更新任务智能体的主页数据、写入智能体任务记录。当用户需要创建待办事项、查看任务列表、跟踪任务进度、管理项目清单或给他人分配任务、为任务上传附件文件、注册注销任务智能体、更新智能体主页数据、写入任务记录时使用。\n- `lark-vc`: 飞书视频会议：搜索历史会议记录、查询会议纪要（总结/待办/章节/逐字稿）、查询参会人快照。当用户查询已结束的会议、获取会议产物（纪要/妙记）、查看参会人时使用；查询未来日程走 lark-calendar。不负责：Agent 真实入会/离会、会中实时事件（走 lark-vc-agent）。\n- `lark-vc-agent`: 飞书视频会议会中能力：用于让应用机器人真实加入或离开正在进行的会议，并读取当前身份可见的会中事件、发送会中文本消息或会中表情。适用于用户询问正在开的会议发生了什么、谁在发言、是否共享内容，或需要发现当前可读的进行中会议 ID。不负责已结束会议搜索、参会人快照、纪要、逐字稿或录制查询，这些使用 lark-vc 技能。\n- `lark-whiteboard`: 飞书画板：查询和编辑飞书云文档中的画板。支持导出画板为预览图片、导出原始节点结构、使用多种格式更新画板内容。 当用户需要查看画板内容、导出画板图片、编辑画板时使用此 skill。不负责：飞书云文档内容编辑（lark-doc）、文档内嵌电子表格/Base（lark-sheets / lark-base）。\n- `lark-whiteboard-bindao`: 画板画图 skill。覆盖端到端流程：审美判断 → SVG 创作 → 渲染审查 → 写入飞书画板。 核心是审美标准（高于一切技术约束），技术流程基于 lark-whiteboard skill 的 SVG 路径。 触发：任何需要画图/画框架/画流程/可视化的场景。\n- `lark-wiki`: 飞书知识库：管理知识空间、空间成员和文档节点。创建和查询知识空间、查看和管理空间成员、管理节点层级结构、在知识库中组织文档和快捷方式。当用户需要在知识库中查找或创建文档、浏览知识空间结构、查看或管理空间成员、移动或复制节点时使用。当用户给出 doubao.com 的 /wiki/ URL/token 时，也应直接使用本 skill，不要因为域名不是飞书而回退到 WebFetch；路由依据是 URL 路径模式和 token，而不是域名。不负责：上传文件到知识库节点下（走 lark-drive）、编辑文档/表格/Base 内容（走 lark-doc / lark-sheets / lark-base）。\n- `lark-workflow-meeting-summary`: 会议纪要整理工作流：汇总指定时间范围内的会议纪要并生成结构化报告。当用户需要整理会议纪要、生成会议周报、回顾一段时间内的会议内容时使用。\n- `lark-workflow-standup-report`: 日程待办摘要：编排 calendar +agenda 和 task +get-my-tasks，生成指定日期的日程与未完成任务摘要。适用于了解今天/明天/本周的安排。\n- `latent-briefing`: This skill should be used when the user asks to \"share memory between agents\", \"KV cache compaction for multi-agent\", \"orchestrator worker context\", \"latent briefing\", \"reduce worker tokens\", \"cross-agent memory without summarization\", or discusses Attention Matching compaction, recursive language models with workers, or token explosion in hierarchical agents.\n- `literature-triage-matrix`: Turn a list of papers (Zotero collection, Obsidian cluster, manual list) into a compact comparison matrix written to .research/literature_matrix.md, instead of generic per-paper summaries. Use when the user asks to \"make a literature matrix\", \"compare these papers by method/data/limitations\", or \"decide which papers are central to my review\". If the user says \"extract the claims from these papers\": cross-paper comparison matrix → this skill; claims from their own manuscript draft → `paper-mem...\n- `mcp-builder`: Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).\n- `memory-systems`: This skill should be used for persistent semantic memory in agent systems: cross-session knowledge retention, entity tracking, temporal validity, graph or vector retrieval, memory consolidation, and memory benchmark selection. Route file-backed scratchpads to filesystem-context, handoff summaries to context-compression, and token-efficiency tactics to context-optimization.\n- `multi-agent-patterns`: This skill should be used when designing multi-agent systems that need context isolation, supervisor or swarm coordination, explicit handoffs, parallel execution, or a decision on whether multiple agents are justified.\n- `notebooklm-brief-verifier`: Compare a downloaded NotebookLM brief against the source bundle research-hub uploaded, and report missed sources, unsupported claims, contradictions, and recommended follow-up prompts. Use when the user asks to \"verify this NotebookLM brief\", \"check if the brief missed anything\", or \"compare downloaded notes to the cluster papers\".\n- `paper-memory-builder`: Convert a paper draft + figures + Zotero metadata into reusable .paper/claims.yml and .paper/figures.yml files so the academic-writing-skills skill can do writing, revision, and audit passes without re-reading the manuscript every time. Use when the user asks to \"build paper memory\", \"extract claims from this manuscript\", \"extract claims, supporting evidence, and figure key numbers\", or \"prepare this paper for AI-assisted writing\". NOT for summarizing cited papers in a literature cluster — th...\n- `paper-summarize`: After research-hub ingests a cluster of cited papers, fill the per-paper Key Findings + Methodology + Relevance sections in BOTH Obsidian markdown and the Zotero child note. Use when the user says \"fill the TODO Key Findings/Methodology blocks left by research-hub auto\", \"I just ran auto and don't know what these papers are about\", or \"summarize the papers in cluster X\". Invokes a supported LLM CLI on each paper's abstract. NOT for summarizing the user's own manuscript draft — that's `paper-m...\n- `pdf`: Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and OCR on scanned PDFs to make them searchable. If the user mentions a .pdf file or asks to produce one, use this skill.\n- `pptx`: Use this skill any time a .pptx file is involved in any way — as input, output, or both. This includes: creating slide decks, pitch decks, or presentations; reading, parsing, or extracting text from any .pptx file (even if the extracted content will be used elsewhere, like in an email or summary); editing, modifying, or updating existing presentations; combining or splitting slide files; working with templates, layouts, speaker notes, or comments. Trigger whenever the user mentions \"deck,\" \"s...\n- `prototype`: Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model or logic feels right, or explore what a UI should look like.\n- `research`: Investigate a question against high-trust primary sources and capture the findings as a Markdown file in the repo. Use when the user wants a topic researched, docs or API facts gathered, or reading legwork delegated to a background agent.\n- `research-add-fields`: 向现有调研outline补充字段定义。\n- `research-add-items`: 向现有调研outline补充items（调研对象）。\n- `research-chapter-ops`: Use when beginning work on a thesis chapter — creates and maintains the Chapter Operations Document (OPS file) with structure, decisions, error triggers, and cross-section conventions. Triggers on 'new chapter', 'chapter operations', 'OPS file', 'chapter setup', 'chapter-level coordination'.\n- `research-citation-management`: Use when managing citations in thesis writing — three-pipeline system for gap analysis, verification, and programmatic insertion with dual-AI cross-verification. Triggers on 'add citations', 'citation gaps', 'verify references', 'insert citations', 'reference management', 'bibliography'.\n- `research-context-compressor`: Inspect a research repository and write a compact `.research/` workspace manifest (project_manifest.yml, experiment_matrix.yml, data_dictionary.yml) so future AI sessions can orient themselves without rescanning the whole repo. Use when the user asks to \"compress this project context\", \"create a research manifest\", or \"save the project context for future agents\".\n- `research-deep`: 读取调研outline，为每个item启动独立agent进行深度调研。禁用job output。\n- `research-design-helper`: Guide a researcher through 5 Socratic segments — research question sharpening, expected mechanism, identifiability check, validation plan, risk register — and produce `.research/design_brief.md`. Use when the user asks to \"frame this research question\", \"design my study\", \"help me think through what model to build\", \"sharpen my hypothesis\", \"is my research question sharp enough to be falsifiable?\", or \"before I start coding, walk me through the design\". Runs AFTER a topic is chosen — it desig...\n- `research-error-log`: Use when creating, structuring, or extending the project Error Log (`CLAUDE_ERROR_LOG.md` / `CLAUDE_ERROR_LOG_V2.md`) — defines the dual-track archive/active format, three-layer V2 architecture, pattern entry schema, add-new-pattern protocol, and how postmortem / brief / review skills interface with it. Triggers on 'error log', 'new error pattern', 'add pattern to log', 'set up error log', 'V2 checklist', 'CLAUDE_ERROR_LOG', 'how does the error log work'.\n- `research-figure-generation`: Use when creating publication-quality figures for thesis — pipeline from raw data through verification, generation, researcher review, to Word document integration. Triggers on 'create figure', 'plot data', 'generate figure', 'thesis figures', 'insert figures into Word'.\n- `research-gemini-review`: Use after Claude writes any thesis prose draft — invokes Gemini API as an independent cross-model critic to eliminate self-preference bias. REQUIRED after research-writing-brief produces prose and before research-three-stage-review can be considered final. Triggers on 'review this draft', 'cross-model review', 'Gemini check', 'independent review of thesis prose'.\n- `research-hub`: Operate research-hub workflows for literature discovery, source ingest into Zotero/Obsidian/NotebookLM, dashboard inspection, and vault maintenance. Use when the user asks to find papers and organize them, build a knowledge base, ingest a folder of PDFs, upload to NotebookLM, generate research briefs, inspect clusters, or maintain a research vault. NOT for auditing or cleaning up an existing Zotero library — that's `zotero-library-curator` (read-only audit) plus `zotero-skills` (for CRUD).\n- `research-hub-multi-ai`: Research-domain router that writes `.coord/multi_ai_plan.md` when a single round of work will need two or more delegates AND the work touches research-hub artifacts (`.research/`, `.paper/`, Zotero/Obsidian/NotebookLM pipelines). For a single delegate, use `codex-delegate` or `gemini-delegate` directly — do not invoke this skill. For generic non-research multi-agent decomposition (pure code refactor, generic translation, no research-hub artifact), use `agent-collab-workspace:agent-task-splitt...\n- `research-paper-adaptation`: Use when converting a published paper (where researcher is author) into a thesis chapter — adaptation protocol with side-by-side verification and change classification. Triggers on 'adapt paper', 'paper to thesis', 'convert publication', 'published paper chapter', 'adapt manuscript'.\n- `research-postmortem`: Use when a thesis draft is rejected and must be rewritten from scratch — structured 5-part investigation into process failure with root cause analysis and systemic action items. Triggers on 'draft rejected', 'rewrite from scratch', 'writing failure', 'postmortem', 'what went wrong with the draft'.\n- `research-pre-writing-discussion`: Use before creating a Writing Brief for any thesis section — structured interview to extract researcher's knowledge, judgments, and decisions through three phases. Triggers on 'discuss section', 'plan what to write', 'pre-writing discussion', 'before writing brief', 'extract knowledge for section'.\n- `research-project-orienter`: Read the .research/ manifest files at a project root and produce a single orientation memo (research question, datasets, current stage, key entrypoints, evidence artifacts, open questions). Use when the user asks to \"orient me in this project\", \"what is this repo about\", or \"build a context map for this paper\" — and the project already has .research/ manifests (or trigger research-context-compressor first).\n- `research-report`: 将deep调研结果汇总为markdown报告，覆盖所有字段，跳过不确定值。\n- `research-session-management`: Use when starting or ending any thesis writing session — manages INDEX files, handoff documents, and startup/shutdown protocols for cross-session continuity. Triggers on 'new thesis session', 'session handoff', 'continue thesis work', 'pick up where left off', 'end session'.\n- `research-style-audit`: Use after completing any thesis section draft — runs programmatic style audit to catch Pattern\n- `research-task-file`: Use when creating self-contained task files for autonomous AI agent execution — goal-oriented instructions with context, decision frameworks, and validation criteria. Triggers on 'create task file', 'autonomous task', 'agent task', 'data extraction task', 'TASK file', 'batch processing task'.\n- `research-three-stage-review`: Use after completing a thesis prose draft — runs three independent review stages with different perspectives and information access. Triggers on 'review draft', 'check section', 'draft review', 'quality check', 'before sending to advisor'.\n- `research-writing`: Use when starting any academic thesis or dissertation writing task — routes to the correct thesis sub-skill based on the current phase of work. Triggers on 'thesis', 'dissertation', 'chapter writing', 'section writing', 'defense prep', 'academic writing with AI'.\n- `research-writing-brief`: Use when planning any thesis section before writing prose — creates a Writing Brief with boundary rules, internalization check, verified data table, and paragraph-level outline with argumentative purposes. Triggers on 'plan section', 'write section X.Y', 'prepare to write', 'writing brief', 'section outline'.\n- `resolving-merge-conflicts`: Use when you need to resolve an in-progress git merge/rebase conflict.\n- `sandbox-sdk`: Build sandboxed applications for secure code execution. Load when building AI code execution, code interpreters, CI/CD systems, interactive dev environments, or executing untrusted code. Covers Sandbox SDK lifecycle, commands, files, code interpreter, and preview URLs. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `scheduled-task-planner`: 分析定时任务需求，确定最优部署方案（Cloudflare Worker 或本地 launchd）\n- `sequential-thinking`: Structured reflective problem-solving methodology. Process: decompose, analyze, hypothesize, verify, revise. Capabilities: complex problem decomposition, adaptive planning, course correction, hypothesis verification, multi-step analysis. Actions: decompose, analyze, plan, revise, verify solutions step-by-step. Keywords: sequential thinking, problem decomposition, multi-step analysis, hypothesis verification, adaptive planning, course correction, reflective thinking, step-by-step, thought sequ...\n- `skill-creator`: Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.\n- `slack-gif-creator`: Knowledge and utilities for creating animated GIFs optimized for Slack. Provides constraints, validation tools, and animation concepts. Use when users request animated GIFs for Slack like \"make me a GIF of X doing Y for Slack.\"\n- `tdd`: Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions \"red-green-refactor\", or wants integration tests.\n- `test`: Test features before users find bugs. Use when feature is built, before deploying, or when bugs reported. Covers manual testing, edge cases, cross-browser testing, and testing checklists for non-technical founders.\n- `theme-factory`: Toolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc. There are 10 pre-set themes with colors/fonts that you can apply to any artifact that has been creating, or can generate a new theme on-the-fly.\n- `turnstile-spin`: Set up Cloudflare Turnstile end-to-end in a project — scan the codebase, create the widget via the Cloudflare API, deploy the managed siteverify Worker, write the frontend snippets, validate, and persist the skill. Load this when a user asks to add Turnstile, set up CAPTCHA, protect a form from bots, or fix a Turnstile integration. Mirrors developers.cloudflare.com/turnstile/spin.\n- `web-artifacts-builder`: Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.\n- `web-perf`: Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (LCP, INP, CLS) and supplementary metrics (FCP, TBT, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge.\n- `webapp-testing`: Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.\n- `workers-best-practices`: Reviews and authors Cloudflare Workers code against production best practices. Load when writing new Workers, reviewing Worker code, configuring wrangler.jsonc, or checking for common Workers anti-patterns (streaming, floating promises, global state, secrets, bindings, observability). Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `wrangler`: Cloudflare Workers CLI for deploying, developing, and managing Workers, KV, R2, D1, Vectorize, Hyperdrive, Workers AI, Containers, Queues, Workflows, Pipelines, and Secrets Store. Load before running wrangler commands to ensure correct syntax and best practices. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.\n- `xlsx`: Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like \"the xlsx in...\n- `zotero-library-curator`: Audit and curate a Zotero library — find duplicate DOIs, orphan items missing required tags, propose collection rebinds, identify bloated or under-used collections, generate tag hygiene reports, emit preview-only cleanup plans. Use when the user asks to \"audit Zotero\", \"find duplicates\", \"tag hygiene report\", \"which collections are bloated or under-used\", or \"propose a Zotero cleanup plan\". Defers all CRUD operations to the standalone `zotero-skills` skill or `research-hub zotero` CLI. Includ...\n</available_skills>\n\nIf the user names a skill, or the task clearly matches a skill's description, call the `skill` tool with the exact skill name before taking task actions. Load all applicable skills, then follow their full instructions. This catalog contains summaries only; do not infer or follow a skill's instructions until it has been loaded.\n</system-reminder>"}],"source":{"kind":"plugin","plugin":"dsh-tool-skill"},"role":"user","id":"6b1b6917-597d-4f0d-a19f-0cafb527556c"},"surfaceOp":"append"}
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+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly WORKSPACE_POLICY_SEEN. Do not call tools."}],"source":{"kind":"user","rpcId":"{{rpcId}}"},"role":"user","id":"88f8ecbc-e3dd-4bbc-b275-3ece1d99129b"},"surfaceOp":"append"}
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+{"type":"user/message","data":{"content":[{"type":"text","text":"Create the relative path policy-neutral.txt in the current workspace containing exactly POLICY_NEUTRAL_OK, verify its contents, then report completion."}],"source":{"kind":"user","rpcId":"{{rpcId}}"},"role":"user","id":"b525eed8-83d8-4cab-b9ea-7544354e4a56"},"surfaceOp":"append"}
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diff --git a/apps/web/tests/snapshots/plan-review/session.jsonl b/apps/web/tests/snapshots/plan-review/session.jsonl
index 960c05393f..dff70d3364 100644
--- a/apps/web/tests/snapshots/plan-review/session.jsonl
+++ b/apps/web/tests/snapshots/plan-review/session.jsonl
@@ -1,39 +1,39 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1785406804293,"cwd":"{{cwd}}/workspace"}
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-{"type":"command/done","seq":2,"time":1785406804352,"data":{"commandId":"cmd-228a60ef-1","kind":"success","text":"Plan mode on. Use /plan off to leave."}}
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diff --git a/apps/web/tests/snapshots/steering/session.jsonl b/apps/web/tests/snapshots/steering/session.jsonl
index ce40ba4225..e1fcca2a51 100644
--- a/apps/web/tests/snapshots/steering/session.jsonl
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diff --git a/apps/web/tests/snapshots/turn-tail-actions/session.jsonl b/apps/web/tests/snapshots/turn-tail-actions/session.jsonl
index b951ae3559..0b2a68e940 100644
--- a/apps/web/tests/snapshots/turn-tail-actions/session.jsonl
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-{"type":"assistant/message","seq":98,"time":1785918216289,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"fbb5a6d0-9945-4b52-ad15-978173d450a7"},"usage":{"inputTokens":103,"outputTokens":3,"cacheReadTokens":7808,"reasoningTokens":0}},"sourceEventSeqs":[92,93,94,95,96,97],"surfaceOp":"append"}
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-{"type":"turn/end","seq":100,"time":1785918216289,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"permission/preset","data":{"preset":"workspace-write"}}
+{"type":"sandbox/mode","data":{"mode":"workspace-write"}}
+{"type":"approval/policy","data":{"policy":"ask"}}
+{"type":"turn/start","data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user","rpcId":"{{rpcId}}"}}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Begin your reply with the plain sentence \"Reading the workspace now.\" as text, and in that same message call the bash tool with the command \"echo alpha\". After the tool result, reply with the single word DONE and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"},"role":"user","id":"4dcaa766-7ea2-4c6a-84cb-0d6ab53b5fb4"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Begin your reply with the","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"{{cwd}}/workspace\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"60b8851a-888c-4d7e-9513-7d845f8d769b"},"surfaceOp":"append"}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash","maxTokens":256000,"reasoningEffort":"high"},"adapterDefaults":{"reasoningEffort":true,"maxTokens":true},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash","contextWindow":1000000}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":1,"index":0,"dt":[101,1,0,0,0,56,1,0,0,0,0,0,0,72,1,0,0,0,0,29,0,0,0,0,35,1,0,17,39,0,0,0,0,0,31,0,0,0,0,0,0],"texts":["The"," user"," wants"," me"," to"," begin"," with"," \"","Reading"," the"," workspace"," now",".\""," and"," call"," bash"," with"," \"","echo"," alpha","\""," in"," the"," same"," message","."," Then"," after"," the"," tool"," result",","," reply"," with"," the"," single"," word"," D","ONE"," and"," stop","."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"text-chunks","data":{"turn":1,"step":1,"index":1,"dt":[0,0,0,48],"texts":["Reading"," the"," workspace"," now","."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":2,"blockType":"tool-call"}}}
+{"type":"tool-call-chunks","data":{"turn":1,"step":1,"index":2,"dt":[28,0,0,0,0,25,0,0,0,52,1,0,0,0,25,0,0,1,15,0,25],"id":"call_00_1yZGg4XTqe0N5r1rnDLx5082","name":"bash","args":["","{","\"","command","\"",": ","\"","echo"," alpha","\"",", ","\"","description","\"",": ","\"","Print"," alpha"," to"," stdout","\"","}"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to begin with \"Reading the workspace now.\" and call bash with \"echo alpha\" in the same message. Then after the tool result, reply with the single word DONE and stop."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"Reading the workspace now."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":2,"block":{"type":"tool-call","id":"call_00_1yZGg4XTqe0N5r1rnDLx5082","name":"bash","arguments":"{\"command\": \"echo alpha\", \"description\": \"Print alpha to stdout\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":7788,"outputTokens":109,"cacheReadTokens":0,"reasoningTokens":42}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to begin with \"Reading the workspace now.\" and call bash with \"echo alpha\" in the same message. Then after the tool result, reply with the single word DONE and stop."},{"type":"text","text":"Reading the workspace now."},{"type":"tool-call","id":"call_00_1yZGg4XTqe0N5r1rnDLx5082","name":"bash","arguments":"{\"command\": \"echo alpha\", \"description\": \"Print alpha to stdout\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"73708391-4b5f-429e-b71c-ef2114244a95"},"usage":{"inputTokens":7788,"outputTokens":109,"cacheReadTokens":0,"reasoningTokens":42}},"sourceEventSeqs":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_00_1yZGg4XTqe0N5r1rnDLx5082","name":"bash","arguments":"{\"command\": \"echo alpha\", \"description\": \"Print alpha to stdout\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_1yZGg4XTqe0N5r1rnDLx5082"},"content":[{"type":"tool-result","toolCallId":"call_00_1yZGg4XTqe0N5r1rnDLx5082","content":[{"type":"text","text":"alpha\n"}],"isError":false}],"role":"user","id":"8b7ad694-b19e-4728-a804-eef9f53820b9"}},"sourceEventSeqs":[88],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"D"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"ONE"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":103,"outputTokens":3,"cacheReadTokens":7808,"reasoningTokens":0}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"fbb5a6d0-9945-4b52-ad15-978173d450a7"},"usage":{"inputTokens":103,"outputTokens":3,"cacheReadTokens":7808,"reasoningTokens":0}},"sourceEventSeqs":[92,93,94,95,96,97],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/apps/web/tests/snapshots/web-search-round/session.jsonl b/apps/web/tests/snapshots/web-search-round/session.jsonl
index bb0a15fd0b..4895645034 100644
--- a/apps/web/tests/snapshots/web-search-round/session.jsonl
+++ b/apps/web/tests/snapshots/web-search-round/session.jsonl
@@ -1,12 +1,12 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":1785456000000,"cwd":"{{cwd}}"}
-{"type":"user/message","seq":0,"time":1785456000001,"data":{"content":[{"type":"text","text":"Use web_search to search exactly \"DeepSeek Harness snapshot search\". Then reply exactly SEARCH_DONE and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
-{"type":"assistant/chunk","seq":1,"time":1785456000002,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":2,"time":1785456000003,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_web_search","name":"web_search","argumentsDelta":"{\"query\":\"DeepSeek Harness snapshot search\"}"}}}
-{"type":"assistant/chunk","seq":3,"time":1785456000004,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_web_search","name":"web_search","arguments":"{\"query\":\"DeepSeek Harness snapshot search\"}"}}}}
-{"type":"assistant/chunk","seq":4,"time":1785456000005,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":5,"time":1785456000006,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/chunk","seq":6,"time":1785456000007,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":7,"time":1785456000008,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"SEARCH_DONE"}}}
-{"type":"assistant/chunk","seq":8,"time":1785456000009,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SEARCH_DONE"}}}}
-{"type":"assistant/chunk","seq":9,"time":1785456000010,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":12,"outputTokens":2}}}}
-{"type":"assistant/chunk","seq":10,"time":1785456000011,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Use web_search to search exactly \"DeepSeek Harness snapshot search\". Then reply exactly SEARCH_DONE and stop."}],"source":{"kind":"user","rpcId":"{{rpcId}}"}},"surfaceOp":"append"}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_web_search","name":"web_search","argumentsDelta":"{\"query\":\"DeepSeek Harness snapshot search\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_web_search","name":"web_search","arguments":"{\"query\":\"DeepSeek Harness snapshot search\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"SEARCH_DONE"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SEARCH_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":12,"outputTokens":2}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
diff --git a/docs/config-catalog.i18n.yaml b/docs/config-catalog.i18n.yaml
index f7735c282f..516b1f865d 100644
--- a/docs/config-catalog.i18n.yaml
+++ b/docs/config-catalog.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/config-catalog.md
-config-catalog.md: 1676a7e042348bbac8eca478cabcc76c22770af5
-config-catalog.zh.md: 0b32dd18e1d8ab1ca24ce3e5f144402d0d3fad76
+config-catalog.md: 3b0512f70d3e9f68cf6be2fe40a889163384a73c
+config-catalog.zh.md: 640b86198c9f0d198cc18c365f80c810189475cb
diff --git a/docs/config-catalog.md b/docs/config-catalog.md
index 1676a7e042..3b0512f70d 100644
--- a/docs/config-catalog.md
+++ b/docs/config-catalog.md
@@ -1156,7 +1156,7 @@ export interface ReplayModelConfig {
 
 Depends on: [`ModelModality`](../packages/llm/llm/src/index.ts) · [`RetryPolicyConfig`](../packages/llm/llm/src/index.ts)
 
-Source: [`packages/test-support/llm-replay/src/index.ts:776`](../packages/test-support/llm-replay/src/index.ts)
+Source: [`packages/test-support/llm-replay/src/index.ts:779`](../packages/test-support/llm-replay/src/index.ts)
 
 <a id="deepseek-aidsh-llm-retry"></a>
 
diff --git a/docs/config-catalog.zh.md b/docs/config-catalog.zh.md
index 0b32dd18e1..640b86198c 100644
--- a/docs/config-catalog.zh.md
+++ b/docs/config-catalog.zh.md
@@ -1158,7 +1158,7 @@ export interface ReplayModelConfig {
 
 依赖：[`ModelModality`](../packages/llm/llm/src/index.ts) · [`RetryPolicyConfig`](../packages/llm/llm/src/index.ts)
 
-来源：[`packages/test-support/llm-replay/src/index.ts:776`](../packages/test-support/llm-replay/src/index.ts)
+来源：[`packages/test-support/llm-replay/src/index.ts:779`](../packages/test-support/llm-replay/src/index.ts)
 
 <a id="deepseek-aidsh-llm-retry"></a>
 
diff --git a/docs/module-graph.i18n.yaml b/docs/module-graph.i18n.yaml
index d56eabfa45..751a117f77 100644
--- a/docs/module-graph.i18n.yaml
+++ b/docs/module-graph.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/module-graph.md
-module-graph.md: acc9af96bcb004acc3ce780294797df31587a6d6
-module-graph.zh.md: 0347a6f48c52e74b371d3ab7d94045dee23c4db7
+module-graph.md: e4097ad16cb91389d1a74f1d10f25e5b63ff01c0
+module-graph.zh.md: f103f9a2fe0592dff8d3767297578f4d4e7ea271
diff --git a/docs/module-graph.md b/docs/module-graph.md
index acc9af96bc..e4097ad16c 100644
--- a/docs/module-graph.md
+++ b/docs/module-graph.md
@@ -476,8 +476,6 @@ flowchart TD
   pkg_session_persistence --> pkg_timeout
   pkg_session_projection --> pkg_invariants
   pkg_session_projection --> pkg_session
-  pkg_acp_snapshot --> pkg_invariants
-  pkg_acp_snapshot --> pkg_session
   pkg_llm_retry --> pkg_agent
   pkg_llm_retry --> pkg_brand
   pkg_llm_retry --> pkg_invariants
@@ -1046,6 +1044,9 @@ flowchart TD
   pkg_tool_pwsh --> pkg_system_prompt
   pkg_tool_pwsh --> pkg_tools
   pkg_tool_pwsh --> pkg_user_approval
+  pkg_acp_snapshot --> pkg_invariants
+  pkg_acp_snapshot --> pkg_llm_replay
+  pkg_acp_snapshot --> pkg_session
   pkg_tool_ralph --> pkg_agent
   pkg_tool_ralph --> pkg_invariants
   pkg_tool_ralph --> pkg_llm
@@ -1480,7 +1481,6 @@ flowchart TD
 | [`sandbox`](../packages/sandbox/sandbox) | `sandbox` | [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
 | [`session-persistence`](../packages/session/session-persistence) | `session` | [`brand`](../packages/util/brand), [`invariants`](../packages/runtime-diagnostics/invariants), [`session`](../packages/core/session), [`timeout`](../packages/util/timeout) |
 | [`session-projection`](../packages/session/session-projection) | `session` | [`invariants`](../packages/runtime-diagnostics/invariants), [`session`](../packages/core/session) |
-| [`acp-snapshot`](../packages/test-support/acp-snapshot) | `test-support` | [`invariants`](../packages/runtime-diagnostics/invariants), [`session`](../packages/core/session) |
 | [`llm-retry`](../packages/llm/llm-retry) | `llm` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`timeout`](../packages/util/timeout) |
 | [`agent-default-model`](../packages/core/agent-default-model) | `core` | [`agent`](../packages/core/agent), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`settings`](../packages/settings/settings) |
 | [`goal`](../packages/goal/goal) | `goal` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`session-projection`](../packages/session/session-projection), [`typert-protocol`](../packages/typert/protocol) |
@@ -1583,6 +1583,7 @@ flowchart TD
 | [`sdk-protocol`](../packages/sdk/protocol) | `sdk` | [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent) |
 | [`tool-bash`](../packages/shell/tool-bash) | `shell` | [`agent`](../packages/core/agent), [`invariants`](../packages/runtime-diagnostics/invariants), [`jobs`](../packages/jobs/jobs), [`llm`](../packages/llm/llm), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`shell`](../packages/shell/shell), [`shell-env`](../packages/shell/shell-env), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`user-approval`](../packages/interaction/user-approval) |
 | [`tool-pwsh`](../packages/shell/tool-pwsh) | `shell` | [`agent`](../packages/core/agent), [`invariants`](../packages/runtime-diagnostics/invariants), [`jobs`](../packages/jobs/jobs), [`llm`](../packages/llm/llm), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`shell`](../packages/shell/shell), [`shell-env`](../packages/shell/shell-env), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`user-approval`](../packages/interaction/user-approval) |
+| [`acp-snapshot`](../packages/test-support/acp-snapshot) | `test-support` | [`invariants`](../packages/runtime-diagnostics/invariants), [`llm-replay`](../packages/test-support/llm-replay), [`session`](../packages/core/session) |
 | [`tool-ralph`](../packages/workflow/tool-ralph) | `workflow` | [`agent`](../packages/core/agent), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`subagent`](../packages/subagent/subagent), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`workflow`](../packages/workflow/workflow) |
 | [`workflow-worker-thread`](../packages/workflow/workflow-worker-thread) | `workflow` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`tools`](../packages/core/tools), [`workflow`](../packages/workflow/workflow) |
 | [`subagent-codex`](../packages/subagent/subagent-codex) | `subagent` | [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`sdk-protocol`](../packages/sdk/protocol), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`subprocess`](../packages/subprocess/subprocess), [`timeout`](../packages/util/timeout) |
diff --git a/docs/module-graph.zh.md b/docs/module-graph.zh.md
index 0347a6f48c..f103f9a2fe 100644
--- a/docs/module-graph.zh.md
+++ b/docs/module-graph.zh.md
@@ -478,8 +478,6 @@ flowchart TD
   pkg_session_persistence --> pkg_timeout
   pkg_session_projection --> pkg_invariants
   pkg_session_projection --> pkg_session
-  pkg_acp_snapshot --> pkg_invariants
-  pkg_acp_snapshot --> pkg_session
   pkg_llm_retry --> pkg_agent
   pkg_llm_retry --> pkg_brand
   pkg_llm_retry --> pkg_invariants
@@ -1048,6 +1046,9 @@ flowchart TD
   pkg_tool_pwsh --> pkg_system_prompt
   pkg_tool_pwsh --> pkg_tools
   pkg_tool_pwsh --> pkg_user_approval
+  pkg_acp_snapshot --> pkg_invariants
+  pkg_acp_snapshot --> pkg_llm_replay
+  pkg_acp_snapshot --> pkg_session
   pkg_tool_ralph --> pkg_agent
   pkg_tool_ralph --> pkg_invariants
   pkg_tool_ralph --> pkg_llm
@@ -1482,7 +1483,6 @@ flowchart TD
 | [`sandbox`](../packages/sandbox/sandbox) | `sandbox` | [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session) |
 | [`session-persistence`](../packages/session/session-persistence) | `session` | [`brand`](../packages/util/brand), [`invariants`](../packages/runtime-diagnostics/invariants), [`session`](../packages/core/session), [`timeout`](../packages/util/timeout) |
 | [`session-projection`](../packages/session/session-projection) | `session` | [`invariants`](../packages/runtime-diagnostics/invariants), [`session`](../packages/core/session) |
-| [`acp-snapshot`](../packages/test-support/acp-snapshot) | `test-support` | [`invariants`](../packages/runtime-diagnostics/invariants), [`session`](../packages/core/session) |
 | [`llm-retry`](../packages/llm/llm-retry) | `llm` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`timeout`](../packages/util/timeout) |
 | [`agent-default-model`](../packages/core/agent-default-model) | `core` | [`agent`](../packages/core/agent), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`settings`](../packages/settings/settings) |
 | [`goal`](../packages/goal/goal) | `goal` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`scope`](../packages/core/scope), [`session`](../packages/core/session), [`session-projection`](../packages/session/session-projection), [`typert-protocol`](../packages/typert/protocol) |
@@ -1585,6 +1585,7 @@ flowchart TD
 | [`sdk-protocol`](../packages/sdk/protocol) | `sdk` | [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent) |
 | [`tool-bash`](../packages/shell/tool-bash) | `shell` | [`agent`](../packages/core/agent), [`invariants`](../packages/runtime-diagnostics/invariants), [`jobs`](../packages/jobs/jobs), [`llm`](../packages/llm/llm), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`shell`](../packages/shell/shell), [`shell-env`](../packages/shell/shell-env), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`user-approval`](../packages/interaction/user-approval) |
 | [`tool-pwsh`](../packages/shell/tool-pwsh) | `shell` | [`agent`](../packages/core/agent), [`invariants`](../packages/runtime-diagnostics/invariants), [`jobs`](../packages/jobs/jobs), [`llm`](../packages/llm/llm), [`sandbox`](../packages/sandbox/sandbox), [`sandbox-policy`](../packages/sandbox/sandbox-policy), [`shell`](../packages/shell/shell), [`shell-env`](../packages/shell/shell-env), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`user-approval`](../packages/interaction/user-approval) |
+| [`acp-snapshot`](../packages/test-support/acp-snapshot) | `test-support` | [`invariants`](../packages/runtime-diagnostics/invariants), [`llm-replay`](../packages/test-support/llm-replay), [`session`](../packages/core/session) |
 | [`tool-ralph`](../packages/workflow/tool-ralph) | `workflow` | [`agent`](../packages/core/agent), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`subagent`](../packages/subagent/subagent), [`system-prompt`](../packages/core/system-prompt), [`tools`](../packages/core/tools), [`workflow`](../packages/workflow/workflow) |
 | [`workflow-worker-thread`](../packages/workflow/workflow-worker-thread) | `workflow` | [`agent`](../packages/core/agent), [`brand`](../packages/util/brand), [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`tools`](../packages/core/tools), [`workflow`](../packages/workflow/workflow) |
 | [`subagent-codex`](../packages/subagent/subagent-codex) | `subagent` | [`invariants`](../packages/runtime-diagnostics/invariants), [`llm`](../packages/llm/llm), [`sdk-protocol`](../packages/sdk/protocol), [`session`](../packages/core/session), [`subagent`](../packages/subagent/subagent), [`subprocess`](../packages/subprocess/subprocess), [`timeout`](../packages/util/timeout) |
diff --git a/docs/testing.i18n.yaml b/docs/testing.i18n.yaml
index 8f5b7505cb..f580bc06df 100644
--- a/docs/testing.i18n.yaml
+++ b/docs/testing.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/testing.md
-testing.md: bef73983e48365f6655e4d4242f4f73223d971ed
-testing.zh.md: 7a5935165a335b4f3885092ef7b7b29f08f53c51
+testing.md: e2179effa6365a58584cb9f1dc7e4c40c5533741
+testing.zh.md: c9290e002d9336e3a2d3966dfcf65d7ea594629b
diff --git a/docs/testing.md b/docs/testing.md
index bef73983e4..e2179effa6 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -12,7 +12,7 @@ How this repo tests, tier by tier, and the rules that keep a green suite meaning
 - **Snapshot** (`pnpm run test:snapshot`): keyless expected outputs cover external behavior — transport contracts and presentation, while persisted logs pin assembled backend behavior. ACP boots the real automation-server example, replays a recorded session, and diffs normalized JSON-RPC plus the re-persisted log ([ACP snapshot Agent Note](../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md)); headless backend scenarios boot their explicit example composition through an unexported JSONL test driver, while `apps/cli` separately owns product `dsh --profile headless` acceptance. Use `pnpm run test:snapshot:record` when a model transcript changes and `pnpm run test:snapshot:refresh` when replay input remains valid; review every JSONL and expected-output diff. One ACP scenario (`text-turn`) pins full system-prompt/tool-schema content; other fixtures tokenize it so an edit churns one line ([pinned-header Agent Note](../.agents/notes/archived/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)).
 - **Web browser snapshot** (`pnpm run test:web`; required Linux PR gate): Chromium compares replayed browser output with `apps/web/tests/snapshots/`. CI forces read-only `DSH_SNAPSHOT=replay`, never writing expected outputs; record/refresh stay local and every diff is reviewed ([web e2e lane](../.agents/notes/implemented/testing/2026-07-24-web-gui-browser-e2e-lane.md), [CI gate decision](../.agents/notes/implemented/testing/2026-07-30-web-browser-snapshot-ci-gate.md)). `test:web` [builds first](../.agents/notes/implemented/bug-fix/2026-07-28-themed-scrollbars-and-reserved-gutter.md) for plugin CSS.
 
-Committed session-format JSONL uses the canonical packed-row layout, and the keyless snapshot gate discovers every such fixture by its `session` header; the [temporary migrator](../scripts/migrate-packed-session-fixtures.ts) rewrites older fixture layouts.
+Session fixtures keep headers and payloads but omit body sequence/time envelopes. Replay synthesizes them; runtime persistence is unchanged. Fixtures use canonical packed rows; [the migrator](../scripts/migrate-packed-session-fixtures.ts) rewrites old layouts.
 
 ## The with-key policy: inference is cheap here
 
diff --git a/docs/testing.zh.md b/docs/testing.zh.md
index 7a5935165a..c9290e002d 100644
--- a/docs/testing.zh.md
+++ b/docs/testing.zh.md
@@ -12,7 +12,7 @@
 - **快照**（`pnpm run test:snapshot`）：无密钥预期输出覆盖对外行为（传输约定与呈现），持久化日志则固定组装后的后端行为。ACP 启动真实的自动化服务器示例、回放录制会话，并对归一化 JSON-RPC 与重新持久化的日志执行 diff（[ACP 快照 Agent Note](../.agents/notes/implemented/testing/2026-06-19-acp-snapshot-tests.md)）；headless 后端场景通过未导出的 JSONL 测试 driver 启动各自显式的示例组装，而 `apps/cli` 则单独负责产品 CLI（命令行界面）`dsh --profile headless` 的验收。当模型 transcript（文本记录）发生变化时使用 `pnpm run test:snapshot:record`，回放输入仍然有效时使用 `pnpm run test:snapshot:refresh`；请审查每一处 JSONL 与预期输出差异。一个 ACP 场景（`text-turn`）固定完整的系统提示词与工具 schema 内容；其他 fixture（测试前置数据）将其 token 化，因此修改只会扰动一行（[pinned-header Agent Note](../.agents/notes/archived/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)）。
 - **Web 浏览器快照**（`pnpm run test:web`；必需的 Linux PR（Pull Request）门禁）：Chromium 将回放后的浏览器输出与 `apps/web/tests/snapshots/` 比较。CI 强制只读的 `DSH_SNAPSHOT=replay`，绝不写入预期输出；record/refresh 留在本地，每处 diff 都须评审（[web e2e 车道](../.agents/notes/implemented/testing/2026-07-24-web-gui-browser-e2e-lane.md)、[CI 门禁决策](../.agents/notes/implemented/testing/2026-07-30-web-browser-snapshot-ci-gate.md)）。`test:web` 会[先构建](../.agents/notes/implemented/bug-fix/2026-07-28-themed-scrollbars-and-reserved-gutter.md)以交付插件 CSS。
 
-签入仓库的会话格式 JSONL 使用规范打包行布局，无密钥快照门禁会通过 `session` header 发现每一份此类 fixture；[临时迁移器](../scripts/migrate-packed-session-fixtures.ts)会改写旧版 fixture 布局。
+会话 fixture 保留 header 与 payload，但省略正文序号／时间 envelope。回放会合成这些字段；运行时持久化不变。fixture 使用规范打包行；[迁移器](../scripts/migrate-packed-session-fixtures.ts)会改写旧布局。
 
 ## 带密钥策略：推理（inference）在这里很便宜
 
diff --git a/examples/acp-agent/tests/acp.snapshot.ts b/examples/acp-agent/tests/acp.snapshot.ts
index 1fc0a8c2f8..004c645efc 100644
--- a/examples/acp-agent/tests/acp.snapshot.ts
+++ b/examples/acp-agent/tests/acp.snapshot.ts
@@ -15,7 +15,7 @@ import {
   type SnapshotSuiteOptions,
 } from '@deepseek-ai/dsh-acp-snapshot'
 import { resolvePwshPath } from '@deepseek-ai/dsh-pwsh-local'
-import { decodeStorageRecord } from '@deepseek-ai/dsh-session'
+import { decodeSessionSnapshot } from '@deepseek-ai/dsh-llm-replay'
 
 /**
  * The acp-agent example's snapshot suite: the scenario table for
@@ -121,8 +121,12 @@ async function prepareFsSearchWorkspace(cwd: string): Promise<void> {
 // TODO(acp-snapshot-ownership): Move backend/product scenarios to headless while
 // retaining ACP protocol contracts here.
 
-function fixtureRecords(name: string): unknown[] {
+function fixtureText(name: string): string {
   return readFileSync(join(SNAPSHOTS_DIR, name, 'session.jsonl'), 'utf8')
+}
+
+function fixtureRecords(name: string): unknown[] {
+  return fixtureText(name)
     .trimEnd()
     .split('\n')
     .map(line => JSON.parse(line) as unknown)
@@ -762,7 +766,8 @@ it('pins pi-ai image offload in the request sent by the assembled app', async ()
 }, 45_000)
 
 it('packed ACP fixture retains every chunk row kind without changing the logical session', () => {
-  const source = fixtureRecords(PACKED_CHUNKS_SOURCE)
+  const source = fixtureText(PACKED_CHUNKS_SOURCE)
+  const packedText = fixtureText('packed-chunks')
   const packed = fixtureRecords('packed-chunks')
   const rowTypes = packed.flatMap((record) => {
     if (record === null || typeof record !== 'object') return []
@@ -794,9 +799,12 @@ it('packed ACP fixture retains every chunk row kind without changing the logical
     if (cloned.type === 'hook/result') delete cloned.data?.durationMs
     return cloned
   }
-  const logicalRecords = (records: readonly unknown[]): unknown[] => [
-    records[0],
-    ...records.slice(1).flatMap(record => decodeStorageRecord(record)).map(withoutMessageId),
-  ]
-  expect(logicalRecords(packed)).toStrictEqual(logicalRecords(source))
+  const logicalRecords = (fixture: string): unknown[] => {
+    const decoded = decodeSessionSnapshot(fixture)
+    return [
+      decoded.header,
+      ...decoded.events.map(withoutMessageId),
+    ]
+  }
+  expect(logicalRecords(packedText)).toStrictEqual(logicalRecords(source))
 })
diff --git a/examples/acp-agent/tests/goal-snapshots/goal-round-driver/session.expected.jsonl b/examples/acp-agent/tests/goal-snapshots/goal-round-driver/session.expected.jsonl
index 09b40762e7..d4913cb3b1 100644
--- a/examples/acp-agent/tests/goal-snapshots/goal-round-driver/session.expected.jsonl
+++ b/examples/acp-agent/tests/goal-snapshots/goal-round-driver/session.expected.jsonl
@@ -1,62 +1,62 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Create a durable two-round goal for the ACP snapshot, inspect it, then report readiness."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Create a durable two-round goal for the ACP snapshot, inspect it, then report readiness."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":0,"data":{"title":"Create a durable two-round goal","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":10,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_goal_create","name":"create_goal","argumentsDelta":"{\"objective\":\"Finish the ACP goal-round-driver snapshot proof\",\"max_goal_rounds\":2}"}}}
-{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-round-driver snapshot proof\",\"max_goal_rounds\":2}"}}}}
-{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":8}}}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-round-driver snapshot proof\",\"max_goal_rounds\":2}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":20,"outputTokens":8}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
-{"type":"tool/call","seq":15,"time":0,"data":{"turn":1,"step":1,"callId":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal-round-driver snapshot proof\",\"max_goal_rounds\":2}"}}
-{"type":"goal/change","seq":16,"time":0,"data":{"kind":"goal/change","version":1,"operation":"create","goal":{"id":"goal-{{sessionId}}","revision":1,"objective":"Finish the ACP goal-round-driver snapshot proof","phase":"active","maxGoalRounds":2},"roundsStarted":0,"createdAt":0,"updatedAt":0}}
-{"type":"tool/result","seq":17,"time":0,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_goal_create"},"content":[{"type":"tool-result","toolCallId":"call_goal_create","content":[{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-round-driver snapshot proof\",\"phase\":\"active\",\"roundsStarted\":0,\"maxGoalRounds\":2},\"activation\":\"armed\"}"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
-{"type":"step/end","seq":18,"time":0,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":19,"time":0,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":20,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":21,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"call_goal_get","name":"get_goal","argumentsDelta":"{}"}}}
-{"type":"assistant/chunk","seq":22,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_goal_get","name":"get_goal","arguments":"{}"}}}}
-{"type":"assistant/chunk","seq":23,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":30,"outputTokens":4}}}}
-{"type":"assistant/chunk","seq":24,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":25,"time":0,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_goal_get","name":"get_goal","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":30,"outputTokens":4}},"sourceEventSeqs":[20,21,22,23,24],"surfaceOp":"append"}
-{"type":"tool/call","seq":26,"time":0,"data":{"turn":1,"step":2,"callId":"call_goal_get","name":"get_goal","arguments":"{}"}}
-{"type":"tool/result","seq":27,"time":0,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_goal_get"},"content":[{"type":"tool-result","toolCallId":"call_goal_get","content":[{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal-round-driver snapshot proof\",\"phase\":\"active\",\"roundsStarted\":0,\"maxGoalRounds\":2},\"activation\":\"armed\"}"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[26],"surfaceOp":"append"}
-{"type":"step/end","seq":28,"time":0,"data":{"turn":1,"step":2}}
-{"type":"step/start","seq":29,"time":0,"data":{"turn":1,"step":3}}
-{"type":"assistant/chunk","seq":30,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":31,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"text-delta","index":0,"text":"GOAL READY"}}}
-{"type":"assistant/chunk","seq":32,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"GOAL READY"}}}}
-{"type":"assistant/chunk","seq":33,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":35,"outputTokens":2}}}}
-{"type":"assistant/chunk","seq":34,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":35,"time":0,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"GOAL READY"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":35,"outputTokens":2}},"sourceEventSeqs":[30,31,32,33,34],"surfaceOp":"append"}
-{"type":"step/end","seq":36,"time":0,"data":{"turn":1,"step":3}}
-{"type":"turn/end","seq":37,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":38,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal-round-driver snapshot proof\"\nRound: 1/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":1},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":39,"time":0,"data":{"turn":2}}
-{"type":"agent/inbox/spliced","seq":40,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":41,"time":0,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":42,"time":0,"data":{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal-round-driver snapshot proof\"\nRound: 1/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":1},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"assistant/chunk","seq":43,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":44,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"GOAL ROUND ONE"}}}
-{"type":"assistant/chunk","seq":45,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"GOAL ROUND ONE"}}}}
-{"type":"assistant/chunk","seq":46,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":40,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":47,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":48,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"GOAL ROUND ONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":40,"outputTokens":3}},"sourceEventSeqs":[43,44,45,46,47],"surfaceOp":"append"}
-{"type":"step/end","seq":49,"time":0,"data":{"turn":2,"step":1}}
-{"type":"turn/end","seq":50,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":51,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal-round-driver snapshot proof\"\nRound: 2/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":2},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":52,"time":0,"data":{"turn":3}}
-{"type":"agent/inbox/spliced","seq":53,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":54,"time":0,"data":{"turn":3,"step":1}}
-{"type":"user/message","seq":55,"time":0,"data":{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal-round-driver snapshot proof\"\nRound: 2/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":2},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"assistant/chunk","seq":56,"time":0,"data":{"turn":3,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":57,"time":0,"data":{"turn":3,"step":1,"chunk":{"type":"text-delta","index":0,"text":"partial"}}}
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diff --git a/examples/acp-agent/tests/goal-snapshots/goal-wrapup/session.expected.jsonl b/examples/acp-agent/tests/goal-snapshots/goal-wrapup/session.expected.jsonl
index 46ca2fe819..98a457a26c 100644
--- a/examples/acp-agent/tests/goal-snapshots/goal-wrapup/session.expected.jsonl
+++ b/examples/acp-agent/tests/goal-snapshots/goal-wrapup/session.expected.jsonl
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-{"type":"assistant/chunk","seq":47,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":48,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"text-delta","index":0,"text":"GOAL WRAP-UP: the snapshot objective is achieved and this closing message reaches the user."}}}
-{"type":"assistant/chunk","seq":49,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"GOAL WRAP-UP: the snapshot objective is achieved and this closing message reaches the user."}}}}
-{"type":"assistant/chunk","seq":50,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":52,"outputTokens":14}}}}
-{"type":"assistant/chunk","seq":51,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":52,"time":0,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"GOAL WRAP-UP: the snapshot objective is achieved and this closing message reaches the user."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":52,"outputTokens":14}},"sourceEventSeqs":[47,48,49,50,51],"surfaceOp":"append"}
-{"type":"step/end","seq":53,"time":0,"data":{"turn":2,"step":2}}
-{"type":"turn/end","seq":54,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Create a durable goal for the wrap-up snapshot, then report readiness."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Create a durable goal for the wrap-up snapshot, then report readiness."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Create a durable goal for","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_goal_create","name":"create_goal","argumentsDelta":"{\"objective\":\"Finish the ACP goal wrap-up snapshot proof\",\"max_goal_rounds\":2}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal wrap-up snapshot proof\",\"max_goal_rounds\":2}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":8}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal wrap-up snapshot proof\",\"max_goal_rounds\":2}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":20,"outputTokens":8}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_goal_create","name":"create_goal","arguments":"{\"objective\":\"Finish the ACP goal wrap-up snapshot proof\",\"max_goal_rounds\":2}"}}
+{"type":"goal/change","data":{"kind":"goal/change","version":1,"operation":"create","goal":{"id":"goal-{{sessionId}}","revision":1,"objective":"Finish the ACP goal wrap-up snapshot proof","phase":"active","maxGoalRounds":2},"roundsStarted":0,"createdAt":0,"updatedAt":0}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_goal_create"},"content":[{"type":"tool-result","toolCallId":"call_goal_create","content":[{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":1,\"objective\":\"Finish the ACP goal wrap-up snapshot proof\",\"phase\":\"active\",\"roundsStarted\":0,\"maxGoalRounds\":2},\"activation\":\"armed\"}"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"GOAL READY"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"GOAL READY"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":28,"outputTokens":2}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"GOAL READY"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":28,"outputTokens":2}},"sourceEventSeqs":[20,21,22,23,24],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal wrap-up snapshot proof\"\nRound: 1/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":1},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<goal_round>\nObjective: \"Finish the ACP goal wrap-up snapshot proof\"\nRound: 1/2\n\nContinue working toward the objective in this same session. Treat the current workspace, tool results, and durable session state as authoritative; inspect them instead of assuming earlier narration is still current. Make concrete progress and verify the result. Before claiming completion, gather evidence that the whole objective is achieved, read the current goal, and mark it complete. If work remains, leave the goal active for the next round. Follow the configured goal-tool policy before reporting a blocker.\n</goal_round>"}],"source":{"kind":"goal","goalId":"goal-{{sessionId}}","revision":1,"round":1},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_goal_complete","name":"update_goal","argumentsDelta":"{\"goal_id\":\"goal-{{sessionId}}\",\"revision\":1,\"action\":\"complete\"}"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_goal_complete","name":"update_goal","arguments":"{\"goal_id\":\"goal-{{sessionId}}\",\"revision\":1,\"action\":\"complete\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":40,"outputTokens":9}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_goal_complete","name":"update_goal","arguments":"{\"goal_id\":\"goal-{{sessionId}}\",\"revision\":1,\"action\":\"complete\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":40,"outputTokens":9}},"sourceEventSeqs":[33,34,35,36,37],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":2,"step":1,"callId":"call_goal_complete","name":"update_goal","arguments":"{\"goal_id\":\"goal-{{sessionId}}\",\"revision\":1,\"action\":\"complete\"}"}}
+{"type":"goal/change","data":{"kind":"goal/change","version":1,"operation":"complete","goal":{"id":"goal-{{sessionId}}","revision":2,"objective":"Finish the ACP goal wrap-up snapshot proof","phase":"complete","maxGoalRounds":2},"roundsStarted":1,"createdAt":0,"updatedAt":0}}
+{"type":"tool/result","data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"call_goal_complete"},"content":[{"type":"tool-result","toolCallId":"call_goal_complete","content":[{"type":"text","text":"{\"goal\":{\"id\":\"goal-{{sessionId}}\",\"revision\":2,\"objective\":\"Finish the ACP goal wrap-up snapshot proof\",\"phase\":\"complete\",\"roundsStarted\":1,\"maxGoalRounds\":2},\"activation\":\"disarmed\"}"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[39],"surfaceOp":"append"}
+{"type":"agent/inbox/spliced","data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"<goal_complete>\nObjective: \"Finish the ACP goal wrap-up snapshot proof\"\nThe goal is marked complete and this autonomous run is ending. Write the closing message to the user now: state the outcome, summarize what was done and how it was verified, and point to the concrete results (files, commits, or other artifacts). Report only what earlier rounds and tool results in this session actually establish; when a detail is not in the session, say so instead of inventing it. Note anything the user should review or do next. Address the user directly. Do not call any more tools in this run; further work waits for the user's next instruction.\n</goal_complete>"}],"source":{"kind":"plugin","plugin":"tool-goal","form":"notice","summary":"complete: Finish the ACP goal wrap-up snapshot proof"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-step","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":2}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<goal_complete>\nObjective: \"Finish the ACP goal wrap-up snapshot proof\"\nThe goal is marked complete and this autonomous run is ending. Write the closing message to the user now: state the outcome, summarize what was done and how it was verified, and point to the concrete results (files, commits, or other artifacts). Report only what earlier rounds and tool results in this session actually establish; when a detail is not in the session, say so instead of inventing it. Note anything the user should review or do next. Address the user directly. Do not call any more tools in this run; further work waits for the user's next instruction.\n</goal_complete>"}],"source":{"kind":"plugin","plugin":"tool-goal","form":"notice","summary":"complete: Finish the ACP goal wrap-up snapshot proof"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"text-delta","index":0,"text":"GOAL WRAP-UP: the snapshot objective is achieved and this closing message reaches the user."}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"GOAL WRAP-UP: the snapshot objective is achieved and this closing message reaches the user."}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":52,"outputTokens":14}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"GOAL WRAP-UP: the snapshot objective is achieved and this closing message reaches the user."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":52,"outputTokens":14}},"sourceEventSeqs":[47,48,49,50,51],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":2}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/goal.snapshot.ts b/examples/acp-agent/tests/goal.snapshot.ts
index bf877cf8ce..95d224ccb0 100644
--- a/examples/acp-agent/tests/goal.snapshot.ts
+++ b/examples/acp-agent/tests/goal.snapshot.ts
@@ -2,10 +2,9 @@ import { readFile, writeFile } from 'node:fs/promises'
 import { dirname, join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import {
-  normalizeSessionLog,
+  normalizeSessionSnapshot,
   normalizeStdout,
   runScenario,
-  scrubRequestHeaders,
   type AgentUnderTest,
   type InputScript,
   type NormalizeContext,
@@ -59,9 +58,7 @@ function normalizeGoalTimestamps(value: unknown): unknown {
 
 /** Normalize one persisted goal log after the shared snapshot scrubbers. */
 function normalizeGoalLog(content: string, context: NormalizeContext): string {
-  return parseJsonl(scrubRequestHeaders(normalizeSessionLog(content, context)))
-    .map(record => JSON.stringify(normalizeGoalTimestamps(record)))
-    .join('\n') + '\n'
+  return normalizeGoalTimestamps(normalizeSessionSnapshot(content, context)) as string
 }
 
 describe('same-session goal snapshot through the ACP automation driver', () => {
diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
index dca2bd49a4..6209d2c917 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
@@ -1,20 +1,20 @@
 {"type":"session","version":0,"id":"22222222-2222-4222-8222-222222222222","createdAt":1783950001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786357538290,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":1,"time":1786357538290,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ebe0cfa0-a909-47e0-8294-28ad84a8fe77"}]}}
-{"type":"turn/start","seq":2,"time":1786357538290,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786357538290,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":4,"time":1786357538308,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
-{"type":"step/start","seq":5,"time":1786357538310,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":1785730458555,"data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ebe0cfa0-a909-47e0-8294-28ad84a8fe77"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":1786357538310,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"21c656d1-bb34-4dcd-8d27-9eac72ffcd72"},"surfaceOp":"append"}
-{"type":"session/title","seq":8,"time":1786357538310,"data":{"title":"Reply with exactly DIRECT_CHILD_OK and","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":9,"time":1785730458555,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":10,"time":1785730458555,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":11,"time":1783957884564,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":12,"time":1783957884564,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"DIRECT_CHILD_OK"}}}
-{"type":"assistant/chunk","seq":13,"time":1785498801905,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DIRECT_CHILD_OK"}}}}
-{"type":"assistant/chunk","seq":14,"time":1785730458561,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":15,"time":1785730458561,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":16,"time":1785730458561,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b9c977ca-2c1a-4a5e-8397-e0b9381a9943"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
-{"type":"step/end","seq":17,"time":1785730458561,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":18,"time":1785730458561,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ebe0cfa0-a909-47e0-8294-28ad84a8fe77"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"ebe0cfa0-a909-47e0-8294-28ad84a8fe77"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"21c656d1-bb34-4dcd-8d27-9eac72ffcd72"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly DIRECT_CHILD_OK and","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"DIRECT_CHILD_OK"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DIRECT_CHILD_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b9c977ca-2c1a-4a5e-8397-e0b9381a9943"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
index f33ff585c9..f12c7fd267 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
@@ -1,20 +1,20 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1783950002000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786357538450,"data":{"policy":"never","source":"delegation"}}
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diff --git a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl
index d9976d5810..a648de8a58 100644
--- a/examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/agent-instructions/session.jsonl b/examples/acp-agent/tests/snapshots/agent-instructions/session.jsonl
index 8cbadc1781..70d352c421 100644
--- a/examples/acp-agent/tests/snapshots/agent-instructions/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/agent-instructions/session.jsonl
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 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
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index 17e795077c..d78d551068 100644
--- a/examples/acp-agent/tests/snapshots/background-job-admission/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/background-job-admission/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl b/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
index 449db5acb4..f71d3188a5 100644
--- a/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
@@ -1,28 +1,28 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl b/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl
index 6e4de13d80..a01d6b3da7 100644
--- a/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/bash-tool-turn/session.jsonl
@@ -1,35 +1,35 @@
 {"type":"session","version":0,"id":"e128dda9-ed11-4868-8266-0ef90d03c3d6","createdAt":1783352050748,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl b/examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl
index 7490f9487f..86106a4628 100644
--- a/examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl b/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
index a3676dbc3d..c11b6215d4 100644
--- a/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/cancel-tool-calls/session.jsonl
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+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"bf953438-d1c4-4e00-a06b-7f5e2da1df7a"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Run two shell commands: wait","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
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+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":10}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_wait","name":"bash","arguments":"{\"command\":\"node -e \\\"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\\\"\",\"description\":\"Wait until cancellation\"}"},{"type":"tool-call","id":"call_skipped","name":"bash","arguments":"{\"command\":\"printf skipped > skipped.txt\",\"description\":\"Write skipped marker\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"57600715-8366-4277-9cb3-3b6f55fef1ec"},"usage":{"inputTokens":10,"outputTokens":10}},"sourceEventSeqs":[9,10,11,12,13,14,15,16],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_wait","name":"bash","arguments":"{\"command\":\"node -e \\\"require('node:fs').writeFileSync('started.txt', 'started'); setInterval(() => {}, 1000)\\\"\",\"description\":\"Wait until cancellation\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_wait"},"content":[{"type":"tool-result","toolCallId":"call_wait","content":[{"type":"text","text":"Error: tool call aborted"}],"isError":true}],"role":"user","id":"f8706456-630a-419b-83b6-91a9f7e464d7"},"error":{"name":"AbortError","code":"ABORTED"}},"sourceEventSeqs":[18],"surfaceOp":"append"}
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+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_skipped"},"content":[{"type":"tool-result","toolCallId":"call_skipped","content":[{"type":"text","text":"Error: tool call aborted before dispatch"}],"isError":true}],"role":"user","id":"55c65cec-41ad-4361-bc86-e82b7726d445"},"error":{"name":"AbortError","code":"ABORTED_BEFORE_DISPATCH"}},"sourceEventSeqs":[20],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"aborted","reason":{"kind":"user"}}}}
diff --git a/examples/acp-agent/tests/snapshots/cancel/session.jsonl b/examples/acp-agent/tests/snapshots/cancel/session.jsonl
index c6396be679..32424351bb 100644
--- a/examples/acp-agent/tests/snapshots/cancel/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/cancel/session.jsonl
@@ -1,14 +1,14 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498791421,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Start a long task; this turn will be cancelled mid-stream."}],"source":{"kind":"user"},"role":"user","id":"f74653c2-8793-4004-ab0d-833a8dfd42bf"}]}}
-{"type":"turn/start","seq":1,"time":1785821401560,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821401560,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498791446,"data":{"content":[{"type":"text","text":"Start a long task; this turn will be cancelled mid-stream."}],"source":{"kind":"user"},"role":"user","id":"f74653c2-8793-4004-ab0d-833a8dfd42bf"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730444531,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"2c4c8dc2-5141-4963-adbc-5928729d3bf6"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1785730444531,"data":{"title":"Start a long task; this","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1785498791447,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":1785730444532,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":1785498791456,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":10,"time":1785730444541,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"partial"}}}
-{"type":"step/end","seq":11,"time":1785730444547,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":12,"time":1785730444547,"data":{"turn":1,"reason":{"kind":"aborted","reason":{"kind":"user"}}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Start a long task; this turn will be cancelled mid-stream."}],"source":{"kind":"user"},"role":"user","id":"f74653c2-8793-4004-ab0d-833a8dfd42bf"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Start a long task; this turn will be cancelled mid-stream."}],"source":{"kind":"user"},"role":"user","id":"f74653c2-8793-4004-ab0d-833a8dfd42bf"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"2c4c8dc2-5141-4963-adbc-5928729d3bf6"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Start a long task; this","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"partial"}}}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"aborted","reason":{"kind":"user"}}}}
diff --git a/examples/acp-agent/tests/snapshots/code-mode-read-image/session.jsonl b/examples/acp-agent/tests/snapshots/code-mode-read-image/session.jsonl
index cb63f29c34..05ba39df70 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-read-image/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/code-mode-read-image/session.jsonl
@@ -1,33 +1,33 @@
 {"type":"session","version":0,"id":"44444444-4444-4444-8444-444444444444","createdAt":1783952000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1786431644501,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Using ONE run_code program, create a one-pixel PNG with Node.js, call read_image on it, then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"08e67dbb-9432-4fe4-b7da-4483998c0a31"}]}}
-{"type":"turn/start","seq":1,"time":1786431644502,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1786431644502,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1786431644557,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1786431644558,"data":{"content":[{"type":"text","text":"Using ONE run_code program, create a one-pixel PNG with Node.js, call read_image on it, then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"08e67dbb-9432-4fe4-b7da-4483998c0a31"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1786431644558,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"99b9db8d-e4ec-4ea9-b5e2-1e4c0ff6354b"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1786431644558,"data":{"title":"Using ONE run_code program, create","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1786431644559,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":1786431644560,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":1783952000009,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":10,"time":1786431644571,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"code-image-call","name":"run_code","arguments":"{\"code\":\"const bytes = [137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,1,0,0,0,1,8,2,0,0,0,144,119,83,222,0,0,0,12,73,68,65,84,120,156,99,248,207,192,0,0,3,1,1,0,201,254,146,239,0,0,0,0,73,69,78,68,174,66,96,130];\\nawait tools.bash({ command: \\\"node -e \\\\\\\"require('node:fs').writeFileSync('red.png',Buffer.from([137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,1,0,0,0,1,8,2,0,0,0,144,119,83,222,0,0,0,12,73,68,65,84,120,156,99,248,207,192,0,0,3,1,1,0,201,254,146,239,0,0,0,0,73,69,78,68,174,66,96,130]));\\\\\\\"\\\", description: \\\"Create a one pixel PNG\\\" });\\nconst image = await tools.read_image({ file_path: \\\"red.png\\\" });\\nreturn image.path;\",\"description\":\"Create and inspect one image\"}"}}}}
-{"type":"assistant/chunk","seq":11,"time":1786431644572,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":12,"time":1786431644572,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":13,"time":1786431644572,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"code-image-call","name":"run_code","arguments":"{\"code\":\"const bytes = [137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,1,0,0,0,1,8,2,0,0,0,144,119,83,222,0,0,0,12,73,68,65,84,120,156,99,248,207,192,0,0,3,1,1,0,201,254,146,239,0,0,0,0,73,69,78,68,174,66,96,130];\\nawait tools.bash({ command: \\\"node -e \\\\\\\"require('node:fs').writeFileSync('red.png',Buffer.from([137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,1,0,0,0,1,8,2,0,0,0,144,119,83,222,0,0,0,12,73,68,65,84,120,156,99,248,207,192,0,0,3,1,1,0,201,254,146,239,0,0,0,0,73,69,78,68,174,66,96,130]));\\\\\\\"\\\", description: \\\"Create a one pixel PNG\\\" });\\nconst image = await tools.read_image({ file_path: \\\"red.png\\\" });\\nreturn image.path;\",\"description\":\"Create and inspect one image\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"644382c5-5a05-4bda-b8dc-b9195d6a7d8b"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[9,10,11,12],"surfaceOp":"append"}
-{"type":"tool/call","seq":14,"time":1786431644573,"data":{"turn":1,"step":1,"callId":"code-image-call","name":"run_code","arguments":"{\"code\":\"const bytes = [137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,1,0,0,0,1,8,2,0,0,0,144,119,83,222,0,0,0,12,73,68,65,84,120,156,99,248,207,192,0,0,3,1,1,0,201,254,146,239,0,0,0,0,73,69,78,68,174,66,96,130];\\nawait tools.bash({ command: \\\"node -e \\\\\\\"require('node:fs').writeFileSync('red.png',Buffer.from([137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,1,0,0,0,1,8,2,0,0,0,144,119,83,222,0,0,0,12,73,68,65,84,120,156,99,248,207,192,0,0,3,1,1,0,201,254,146,239,0,0,0,0,73,69,78,68,174,66,96,130]));\\\\\\\"\\\", description: \\\"Create a one pixel PNG\\\" });\\nconst image = await tools.read_image({ file_path: \\\"red.png\\\" });\\nreturn image.path;\",\"description\":\"Create and inspect one image\"}"}}
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-{"type":"user/message","seq":24,"time":1786431644885,"data":{"content":[{"type":"text","text":"<path>{{cwd}}/red.png</path>\n<type>image</type>\n<content>\nimage/png image, 1x1 px, 69 bytes\n</content>"},{"type":"image","attachment":{"attachmentId":"sha256:b1ff9c8ea3a780bad09b346c423d2d0e46815926879b18e841d928376a946640","mediaType":"image/png","bytes":69,"width":1,"height":1,"name":"red.png"}}],"source":{"kind":"plugin","plugin":"tools-code-mode"},"role":"user","id":"99bca54a-c323-4df8-8695-7ef17d02dd65"},"surfaceOp":"append"}
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-{"type":"assistant/chunk","seq":26,"time":1786431644889,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
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-{"type":"assistant/message","seq":29,"time":1786431644890,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a6da60ea-d420-432b-ba00-9b99af045110"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[25,26,27,28],"surfaceOp":"append"}
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-{"type":"turn/end","seq":31,"time":1786431644890,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Using ONE run_code program, create a one-pixel PNG with Node.js, call read_image on it, then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"08e67dbb-9432-4fe4-b7da-4483998c0a31"}]}}
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diff --git a/examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl b/examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl
index a05477498a..a03a077dbb 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/code-mode-turn/session.jsonl
@@ -1,38 +1,38 @@
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diff --git a/examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl b/examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl
index 5e2f511af2..3f6938fffc 100644
--- a/examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/code-mode-workspace-context/session.jsonl
@@ -1,34 +1,34 @@
 {"type":"session","version":0,"id":"b1e35a14-a592-44e6-bf23-b2496ad2bf7b","createdAt":1785014475001,"cwd":"{{cwd}}","delegationDepth":0}
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+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Using ONE run_code program, call tools.read on nested/task.txt. After the program finishes, answer the workspace handshake question using the newly discovered instructions: What is the Code Mode workspace handshake?"}],"source":{"kind":"user"},"role":"user","id":"3b04578e-7b22-4b44-b4cd-ef9d4d26fe8b"}]}}
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+{"type":"user/message","data":{"content":[{"type":"text","text":"Using ONE run_code program, call tools.read on nested/task.txt. After the program finishes, answer the workspace handshake question using the newly discovered instructions: What is the Code Mode workspace handshake?"}],"source":{"kind":"user"},"role":"user","id":"3b04578e-7b22-4b44-b4cd-ef9d4d26fe8b"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nWorkspace snapshot root instruction.\n\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","baseline":true,"baselineIdentity":"{\"projectRoot\":\"\",\"projectRootMarkers\":[\".git\"],\"maxBytes\":65536,\"maxSourceBytes\":1048576,\"instructionFileCandidates\":[\"AGENTS.md\",\"CLAUDE.md\"],\"localInstructionFileCandidates\":[\"AGENTS.local.md\",\"CLAUDE.local.md\"]}","changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"2119a7072358cc727f8d9c4cb7388e905b075fe6"}]},"role":"user","id":"ac92e76e-4861-47a6-87f8-4e9ca904eb24"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"d6d78330-05c0-4ebd-9e29-595df6440250"},"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl b/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
index 923801dfef..ff0ff42208 100644
--- a/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
@@ -1,38 +1,38 @@
 {"type":"session","version":0,"id":"22222222-2222-4222-8222-222222222222","createdAt":1783951000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498803392,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Inspect the exact tools service API and tools/pre-execute event with cordis_inspect_query, then reply with exactly CORDIS_INSPECT_JSDOC_OK."}],"source":{"kind":"user"},"role":"user","id":"3a6e7222-9340-429e-bec7-c30fcd063c70"}]}}
-{"type":"turn/start","seq":1,"time":1785821419616,"data":{"turn":1}}
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-{"type":"user/message","seq":4,"time":1785498803419,"data":{"content":[{"type":"text","text":"Inspect the exact tools service API and tools/pre-execute event with cordis_inspect_query, then reply with exactly CORDIS_INSPECT_JSDOC_OK."}],"source":{"kind":"user"},"role":"user","id":"3a6e7222-9340-429e-bec7-c30fcd063c70"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730459873,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"f9a387d6-bd6f-4613-9c11-5768017feb5c"},"surfaceOp":"append"}
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-{"type":"tool/result","seq":16,"time":1785730459904,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"inspect-tools-api"},"content":[{"type":"tool-result","toolCallId":"inspect-tools-api","content":[{"type":"text","text":"{\n  \"platform\": \"host\",\n  \"provider\": \"Service\",\n  \"method\": \"listService\",\n  \"data\": {\n    \"mode\": \"service\",\n    \"service\": {\n      \"key\": \"tools\",\n      \"description\": \"Tool registry and execution pipeline. Scoped registrations shadow globals; one visibility resolver feeds presentation, lookup, and dispatch.\",\n      \"access\": {\n        \"optional\": {\n          \"expression\": \"ctx.get(\\\"tools\\\")\",\n          \"requiresUndefinedCheck\": true\n        },\n        \"hardDependency\": {\n          \"inject\": [\n            \"tools\"\n          ],\n          \"expression\": \"ctx.tools\"\n        }\n      },\n      \"methods\": [\n        {\n          \"signature\": \"presentAs(mode: ToolPresentationMode): () => void\",\n          \"description\": \"Present the calling scope's tools in `mode` instead of the deployment default. Nearest scope on the chain wins, so a preset's standing declaration covers every agent joined under it.\\n\\nScoped only, and one declaration per scope: this is how an agent preset composes Code Mode agents beside native ones in the same process, and a process-global override would be the `mode` config field instead.\",\n          \"parameters\": [\n            {\n              \"name\": \"mode\",\n              \"description\": \"the presentation the covered agents' models see.\"\n            }\n          ],\n          \"returns\": \"the exact disposer that restores the deployment default.\"\n        },\n        {\n          \"signature\": \"register(definition: ToolDefinition): () => void\",\n          \"description\": \"Register globally or in the calling agent scope. Scoped tools shadow globals; duplicates within one layer and the reserved `run_code` name fail.\",\n          \"parameters\": [\n            {\n              \"name\": \"definition\",\n              \"description\": \"tool schema, execution, and optional finalization/presentation callbacks.\"\n            }\n          ],\n          \"returns\": \"the exact disposer that unregisters the tool.\"\n        },\n        {\n          \"signature\": \"restrict(filter: ToolRestriction): () => void\",\n          \"description\": \"Restrict global tools for the calling agent scope. Empty filters, unknown names, scope-local names, and reserved transport names fail. Restrictions intersect; scoped registrations remain visible.\",\n          \"parameters\": [\n            {\n              \"name\": \"filter\",\n              \"description\": \"global-tool mask: `allow` (keep only) and/or `deny` (remove).\"\n            }\n          ],\n          \"returns\": \"the exact disposer that lifts this restriction.\"\n        },\n        {\n          \"signature\": \"guard(guard: ToolGuard): () => void\",\n          \"description\": \"Register a monotonic guard after the extensible `tools/pre-execute` waterfall. A plain-context guard applies globally; one registered through `agent.ctx` applies only to that agent. Any matching guard may deny by returning a reason, while no guard can force-allow a call another guard denied. The exact effect disposer is returned for ordered ownership and HMR cleanup.\",\n          \"parameters\": [\n            {\n              \"name\": \"guard\",\n              \"description\": \"synchronous check; a returned string denies the execution.\"\n            }\n          ],\n          \"returns\": \"the exact disposer that unregisters the guard.\"\n        },\n        {\n          \"signature\": \"get(name: string, scope?: ScopeKey): ToolDefinition | undefined\",\n          \"description\": \"Look up a tool as one scope sees it (scoped shadows global; a restricted-away global reads as absent). Presenters pass the calling agent so the rendered card matches the definition that actually executed.\",\n          \"parameters\": [\n            {\n              \"name\": \"name\",\n              \"description\": \"the tool name as registered.\"\n            },\n            {\n              \"name\": \"scope\",\n              \"description\": \"the viewing scope (the agent); omitted = the global view.\"\n            }\n          ],\n          \"returns\": \"the definition the scope resolves, or undefined when none is visible.\"\n        },\n        {\n          \"signature\": \"schemas(scope?: ScopeKey): ToolSchema[]\",\n          \"description\": \"Project visible definitions onto the allowlisted model-facing schema fields, excluding execution and presentation callbacks.\",\n          \"parameters\": [\n            {\n              \"name\": \"scope\",\n              \"description\": \"the viewing scope (the agent); omitted = the global view.\"\n            }\n          ],\n          \"returns\": \"one deep-cloned schema per visible tool.\"\n        },\n        {\n          \"signature\": \"executionMode(exec: ToolExecutionInput): ToolExecutionMode\",\n          \"description\": \"Classify a pending call through the caller's visible tool definition. Only an exact `true` is parallel; unknown, hidden, undeclared, invalid, or throwing classifiers are exclusive.\",\n          \"parameters\": [\n            {\n              \"name\": \"exec\",\n              \"description\": \"call name, parsed arguments, and optional agent scope.\"\n            }\n          ],\n          \"returns\": \"the fail-closed scheduling mode.\"\n        },\n        {\n          \"signature\": \"async execute(exec: ToolExecutionInput): Promise<ToolExecutionResult>\",\n          \"description\": \"Execute through pre-policy, guards, around-dispatch, post-policy, definition-owned content finalization, and final notification. Tool and listener failures resolve as materialized error results; an invisible tool reports `UNKNOWN_TOOL`. The returned outcome is the same lossless, frozen snapshot final observers receive. Cancellation arriving after entry and before final result materialization skips a not-yet-started body with `ABORTED_BEFORE_DISPATCH` or replaces a successful started outcome with `ABORTED`; already-started work is still drained and may retain a tool-owned structured error.\",\n          \"parameters\": [\n            {\n              \"name\": \"exec\",\n              \"description\": \"the typed same-process call input. The registry assigns its correlation token before policy begins.\"\n            }\n          ],\n          \"returns\": \"the materialized final result.\"\n        }\n      ]\n    },\n    \"referencedTypes\": []\n  }\n}"}],"isError":false}],"role":"user","id":"cf2f25e5-8b65-40f2-9301-1635e7497242"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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Scoped registrations shadow globals; one visibility resolver feeds presentation, lookup, and dispatch.\",\n      \"access\": {\n        \"optional\": {\n          \"expression\": \"ctx.get(\\\"tools\\\")\",\n          \"requiresUndefinedCheck\": true\n        },\n        \"hardDependency\": {\n          \"inject\": [\n            \"tools\"\n          ],\n          \"expression\": \"ctx.tools\"\n        }\n      },\n      \"methods\": [\n        {\n          \"signature\": \"presentAs(mode: ToolPresentationMode): () => void\",\n          \"description\": \"Present the calling scope's tools in `mode` instead of the deployment default. Nearest scope on the chain wins, so a preset's standing declaration covers every agent joined under it.\\n\\nScoped only, and one declaration per scope: this is how an agent preset composes Code Mode agents beside native ones in the same process, and a process-global override would be the `mode` config field instead.\",\n          \"parameters\": [\n            {\n              \"name\": \"mode\",\n              \"description\": \"the presentation the covered agents' models see.\"\n            }\n          ],\n          \"returns\": \"the exact disposer that restores the deployment default.\"\n        },\n        {\n          \"signature\": \"register(definition: ToolDefinition): () => void\",\n          \"description\": \"Register globally or in the calling agent scope. 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Restrictions intersect; scoped registrations remain visible.\",\n          \"parameters\": [\n            {\n              \"name\": \"filter\",\n              \"description\": \"global-tool mask: `allow` (keep only) and/or `deny` (remove).\"\n            }\n          ],\n          \"returns\": \"the exact disposer that lifts this restriction.\"\n        },\n        {\n          \"signature\": \"guard(guard: ToolGuard): () => void\",\n          \"description\": \"Register a monotonic guard after the extensible `tools/pre-execute` waterfall. A plain-context guard applies globally; one registered through `agent.ctx` applies only to that agent. Any matching guard may deny by returning a reason, while no guard can force-allow a call another guard denied. The exact effect disposer is returned for ordered ownership and HMR cleanup.\",\n          \"parameters\": [\n            {\n              \"name\": \"guard\",\n              \"description\": \"synchronous check; a returned string denies the execution.\"\n            }\n          ],\n          \"returns\": \"the exact disposer that unregisters the guard.\"\n        },\n        {\n          \"signature\": \"get(name: string, scope?: ScopeKey): ToolDefinition | undefined\",\n          \"description\": \"Look up a tool as one scope sees it (scoped shadows global; a restricted-away global reads as absent). Presenters pass the calling agent so the rendered card matches the definition that actually executed.\",\n          \"parameters\": [\n            {\n              \"name\": \"name\",\n              \"description\": \"the tool name as registered.\"\n            },\n            {\n              \"name\": \"scope\",\n              \"description\": \"the viewing scope (the agent); omitted = the global view.\"\n            }\n          ],\n          \"returns\": \"the definition the scope resolves, or undefined when none is visible.\"\n        },\n        {\n          \"signature\": \"schemas(scope?: ScopeKey): ToolSchema[]\",\n          \"description\": \"Project visible definitions onto the allowlisted model-facing schema fields, excluding execution and presentation callbacks.\",\n          \"parameters\": [\n            {\n              \"name\": \"scope\",\n              \"description\": \"the viewing scope (the agent); omitted = the global view.\"\n            }\n          ],\n          \"returns\": \"one deep-cloned schema per visible tool.\"\n        },\n        {\n          \"signature\": \"executionMode(exec: ToolExecutionInput): ToolExecutionMode\",\n          \"description\": \"Classify a pending call through the caller's visible tool definition. Only an exact `true` is parallel; unknown, hidden, undeclared, invalid, or throwing classifiers are exclusive.\",\n          \"parameters\": [\n            {\n              \"name\": \"exec\",\n              \"description\": \"call name, parsed arguments, and optional agent scope.\"\n            }\n          ],\n          \"returns\": \"the fail-closed scheduling mode.\"\n        },\n        {\n          \"signature\": \"async execute(exec: ToolExecutionInput): Promise<ToolExecutionResult>\",\n          \"description\": \"Execute through pre-policy, guards, around-dispatch, post-policy, definition-owned content finalization, and final notification. Tool and listener failures resolve as materialized error results; an invisible tool reports `UNKNOWN_TOOL`. The returned outcome is the same lossless, frozen snapshot final observers receive. Cancellation arriving after entry and before final result materialization skips a not-yet-started body with `ABORTED_BEFORE_DISPATCH` or replaces a successful started outcome with `ABORTED`; already-started work is still drained and may retain a tool-owned structured error.\",\n          \"parameters\": [\n            {\n              \"name\": \"exec\",\n              \"description\": \"the typed same-process call input. The registry assigns its correlation token before policy begins.\"\n            }\n          ],\n          \"returns\": \"the materialized final result.\"\n        }\n      ]\n    },\n    \"referencedTypes\": []\n  }\n}"}],"isError":false}],"role":"user","id":"cf2f25e5-8b65-40f2-9301-1635e7497242"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/empty-response-retry/session.jsonl b/examples/acp-agent/tests/snapshots/empty-response-retry/session.jsonl
index 2c294b76d4..f51515e061 100644
--- a/examples/acp-agent/tests/snapshots/empty-response-retry/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/empty-response-retry/session.jsonl
@@ -1,22 +1,22 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
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+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"Recovered."}}}
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+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"Recovered."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"422eae65-9975-4a95-8cde-1ddfe21fff4e"},"usage":{"inputTokens":12,"outputTokens":3}},"sourceEventSeqs":[13,14,15,16,17],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/error-finish/session.jsonl b/examples/acp-agent/tests/snapshots/error-finish/session.jsonl
index fdcb57aabd..6e38345f1e 100644
--- a/examples/acp-agent/tests/snapshots/error-finish/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/error-finish/session.jsonl
@@ -1,13 +1,13 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
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-{"type":"step/end","seq":10,"time":1785730686108,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":11,"time":1785730686109,"data":{"turn":1,"reason":{"kind":"error","error":{"message":"simulated provider error (HTTP 401)","code":"AUTH"}}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"This prompt triggers a recorded provider error."}],"source":{"kind":"user"},"role":"user","id":"87677683-56b7-458b-b512-6db73c570e08"}]}}
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+{"type":"session/title","data":{"title":"This prompt triggers a recorded","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"error","failure":{"message":"simulated provider error (HTTP 401)","code":"AUTH"}}}}}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"error","error":{"message":"simulated provider error (HTTP 401)","code":"AUTH"}}}}
diff --git a/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl b/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
index 77a4a39b8d..8a5d99808f 100644
--- a/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
@@ -1,37 +1,37 @@
 {"type":"session","version":0,"id":"f3cbd087-fb45-4b32-b0f2-3082d65bfcb4","createdAt":1783860675270,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl b/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
index 96b51253d9..9c28c439aa 100644
--- a/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
@@ -1,36 +1,36 @@
 {"type":"session","version":0,"id":"d692fe7f-7079-4ee4-8b06-f44fd026d4ea","createdAt":1783860679475,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/fs-delete-recreate/session.jsonl b/examples/acp-agent/tests/snapshots/fs-delete-recreate/session.jsonl
index 7cccd53d6b..192223afbc 100644
--- a/examples/acp-agent/tests/snapshots/fs-delete-recreate/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-delete-recreate/session.jsonl
@@ -1,62 +1,62 @@
 {"type":"session","version":0,"id":"b8c89c36-55db-48cf-9f3e-76140cd37aff","createdAt":1786259114417,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl b/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
index cfcdfee68c..e1494a71c0 100644
--- a/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-edit/session.jsonl
@@ -1,48 +1,48 @@
 {"type":"session","version":0,"id":"736c4bd8-41bd-43fb-9030-b4df3b2a4f83","createdAt":1783352084735,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl b/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
index 6f69260bad..d0104c6a3e 100644
--- a/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
@@ -1,37 +1,37 @@
 {"type":"session","version":0,"id":"977a4820-f609-4b48-9039-adcdd921c5fe","createdAt":1784045702340,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/fs-glob-sampling/session.jsonl b/examples/acp-agent/tests/snapshots/fs-glob-sampling/session.jsonl
index a712edb3ea..0a91026218 100644
--- a/examples/acp-agent/tests/snapshots/fs-glob-sampling/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-glob-sampling/session.jsonl
@@ -1,33 +1,33 @@
 {"type":"session","version":0,"id":"4428b809-66d5-4ea2-9a03-89de742fcda1","createdAt":1785591986068,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl b/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl
index f98c6de27c..2e61352520 100644
--- a/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-policy-reject/session.jsonl
@@ -1,61 +1,61 @@
 {"type":"session","version":0,"id":"b3292503-2c3d-4677-804d-1ed6802a4bc5","createdAt":1783611702544,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl b/examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl
index f9c19a18d3..a7c4c65e09 100644
--- a/examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-read-window/session.jsonl
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index 9bab6eb99e..01275b74be 100644
--- a/examples/acp-agent/tests/snapshots/fs-read/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/fs-write-overwrite-bounded/session.jsonl b/examples/acp-agent/tests/snapshots/fs-write-overwrite-bounded/session.jsonl
index 688bf9cb70..841b462eed 100644
--- a/examples/acp-agent/tests/snapshots/fs-write-overwrite-bounded/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/fs-write-overwrite-bounded/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl b/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl
index 52310b746b..9a3dd5adc6 100644
--- a/examples/acp-agent/tests/snapshots/fs-write-overwrite/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/fs-write/session.jsonl b/examples/acp-agent/tests/snapshots/fs-write/session.jsonl
index 461d8999fe..6799ce2853 100644
--- a/examples/acp-agent/tests/snapshots/fs-write/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-invalid-matcher/session.jsonl
index bc5f42573a..57d24c55d8 100644
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl
index be40c56044..9155a97090 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl
index c03ba4e997..137a63ffa2 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl
index 657cdc49f0..170442d572 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl
@@ -1,38 +1,38 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl
index 6246a746ee..c183ce9354 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl
@@ -1,36 +1,36 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl
index 3d351325fb..c00d97ffb3 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl
index ec17e34afb..9bd5b40163 100644
--- a/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl
@@ -1,41 +1,41 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl
index 374ae19eb3..fe3998b3b4 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-invalid-matcher/session.jsonl
@@ -1,22 +1,22 @@
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/session.jsonl
index cd72379fa4..24e21574df 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl
index 085aca05da..b6765c7fd8 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl
index eb521c4df8..0feb8c2eb6 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl
index e046950b21..5cfd277dcf 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl
index 11f329a53b..609acfdae0 100644
--- a/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl
@@ -1,41 +1,41 @@
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diff --git a/examples/acp-agent/tests/snapshots/inline-image-prompt/session.jsonl b/examples/acp-agent/tests/snapshots/inline-image-prompt/session.jsonl
index 89cffe656d..44537e994e 100644
--- a/examples/acp-agent/tests/snapshots/inline-image-prompt/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/inline-image-prompt/session.jsonl
@@ -1,17 +1,17 @@
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diff --git a/examples/acp-agent/tests/snapshots/lsp-definition/session.jsonl b/examples/acp-agent/tests/snapshots/lsp-definition/session.jsonl
index 471b14d87e..030563a783 100644
--- a/examples/acp-agent/tests/snapshots/lsp-definition/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/lsp-definition/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/max-tokens-continue/session.jsonl b/examples/acp-agent/tests/snapshots/max-tokens-continue/session.jsonl
index 6e2f7a6d1c..9d255ce06e 100644
--- a/examples/acp-agent/tests/snapshots/max-tokens-continue/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/max-tokens-continue/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/missing-sandbox-runner/session.jsonl b/examples/acp-agent/tests/snapshots/missing-sandbox-runner/session.jsonl
index 85bc737d05..0fb9f29e2b 100644
--- a/examples/acp-agent/tests/snapshots/missing-sandbox-runner/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/missing-sandbox-runner/session.jsonl
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index 46aac90caa..5798c550b4 100644
--- a/examples/acp-agent/tests/snapshots/multi-turn/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/packed-chunks/session.jsonl b/examples/acp-agent/tests/snapshots/packed-chunks/session.jsonl
index 1cd7abd70e..cd58c4e1c5 100644
--- a/examples/acp-agent/tests/snapshots/packed-chunks/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/packed-chunks/session.jsonl
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index 295fe91ed9..f6f328185d 100644
--- a/examples/acp-agent/tests/snapshots/parallel-tool-calls/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/partial-landlock-child-failure/session.jsonl b/examples/acp-agent/tests/snapshots/partial-landlock-child-failure/session.jsonl
index 7b73001a01..8241df9c21 100644
--- a/examples/acp-agent/tests/snapshots/partial-landlock-child-failure/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/partial-landlock-child-failure/session.jsonl
@@ -1,28 +1,28 @@
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diff --git a/examples/acp-agent/tests/snapshots/product-subagent-both/session.jsonl b/examples/acp-agent/tests/snapshots/product-subagent-both/session.jsonl
index 84ac27e70e..00cbf9d480 100644
--- a/examples/acp-agent/tests/snapshots/product-subagent-both/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/product-subagent-both/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/product-subagent-codex/session.jsonl b/examples/acp-agent/tests/snapshots/product-subagent-codex/session.jsonl
index bd47dfa24f..715b06781f 100644
--- a/examples/acp-agent/tests/snapshots/product-subagent-codex/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/product-subagent-codex/session.jsonl
@@ -1,22 +1,22 @@
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diff --git a/examples/acp-agent/tests/snapshots/product-subagent-result-diagnostic/session.jsonl b/examples/acp-agent/tests/snapshots/product-subagent-result-diagnostic/session.jsonl
index f1c5ffe374..fd7e324921 100644
--- a/examples/acp-agent/tests/snapshots/product-subagent-result-diagnostic/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/product-subagent-result-diagnostic/session.jsonl
@@ -1,51 +1,51 @@
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diff --git a/examples/acp-agent/tests/snapshots/pty-tools/session.jsonl b/examples/acp-agent/tests/snapshots/pty-tools/session.jsonl
index f9d4ed2242..3ac484571b 100644
--- a/examples/acp-agent/tests/snapshots/pty-tools/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/pty-tools/session.jsonl
@@ -1,78 +1,78 @@
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diff --git a/examples/acp-agent/tests/snapshots/pwsh-tool-turn/session.jsonl b/examples/acp-agent/tests/snapshots/pwsh-tool-turn/session.jsonl
index 09a6a7e7ed..e9886b8929 100644
--- a/examples/acp-agent/tests/snapshots/pwsh-tool-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/pwsh-tool-turn/session.jsonl
@@ -1,34 +1,34 @@
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diff --git a/examples/acp-agent/tests/snapshots/read-image-dimension/session.jsonl b/examples/acp-agent/tests/snapshots/read-image-dimension/session.jsonl
index 0b979e801f..91f014d673 100644
--- a/examples/acp-agent/tests/snapshots/read-image-dimension/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/read-image-dimension/session.jsonl
@@ -1,26 +1,26 @@
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+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"read-image-dimension"},"content":[{"type":"tool-result","toolCallId":"read-image-dimension","content":[{"type":"text","text":"Error: cannot read \"{{cwd}}/wide.png\": at least one image side exceeds the 2000px limit; downscale the image and read the smaller copy"}],"isError":true}],"role":"user","id":"ee31751e-df5a-458e-8497-8113cf6107ef"}},"sourceEventSeqs":[14],"surfaceOp":"append"}
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+{"type":"step/end","data":{"turn":1,"step":2}}
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diff --git a/examples/acp-agent/tests/snapshots/read-image-text-route/session.jsonl b/examples/acp-agent/tests/snapshots/read-image-text-route/session.jsonl
index 3e32a50a32..9a1cb34e5a 100644
--- a/examples/acp-agent/tests/snapshots/read-image-text-route/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/read-image-text-route/session.jsonl
@@ -1,26 +1,26 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1783951000000,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/read-image/session.jsonl b/examples/acp-agent/tests/snapshots/read-image/session.jsonl
index 6acde5a0ff..0579d70703 100644
--- a/examples/acp-agent/tests/snapshots/read-image/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/read-image/session.jsonl
@@ -1,26 +1,26 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1783951000000,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/repeat-tool-reminder/session.jsonl b/examples/acp-agent/tests/snapshots/repeat-tool-reminder/session.jsonl
index f2a5756f67..87342cc721 100644
--- a/examples/acp-agent/tests/snapshots/repeat-tool-reminder/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/repeat-tool-reminder/session.jsonl
@@ -1,79 +1,79 @@
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+{"type":"tool/call","data":{"turn":1,"step":3,"callId":"call_3","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"watch the kettle boil\", \"status\": \"in_progress\"}]}"}}
+{"type":"todo/write","data":{"todos":[{"content":"watch the kettle boil","status":"in_progress"}]}}
+{"type":"tool/result","data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"call_3"},"content":[{"type":"tool-result","toolCallId":"call_3","content":[{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"779c894c-9e9f-4c8e-a073-36d32b421b0f"}},"sourceEventSeqs":[37],"surfaceOp":"append"}
+{"type":"agent/inbox/spliced","data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"You are repeating the exact same tool call with identical arguments. Carefully analyze the previous result before calling again: if the task is not complete, try a different approach or different arguments instead of repeating the call."}],"source":{"kind":"plugin","plugin":"repeat-tool-reminder","form":"notice","summary":"todo_write × 3"},"role":"user","id":"1dee8d17-2cdd-4f76-8330-709191cf8cbb"}]}}
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+{"type":"user/message","data":{"content":[{"type":"text","text":"You are repeating the exact same tool call with identical arguments. Carefully analyze the previous result before calling again: if the task is not complete, try a different approach or different arguments instead of repeating the call."}],"source":{"kind":"plugin","plugin":"repeat-tool-reminder","form":"notice","summary":"todo_write × 3"},"role":"user","id":"1dee8d17-2cdd-4f76-8330-709191cf8cbb"},"surfaceOp":"append"}
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+{"type":"todo/write","data":{"todos":[{"content":"watch the kettle boil","status":"in_progress"}]}}
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+{"type":"tool/call","data":{"turn":1,"step":5,"callId":"call_5","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"watch the kettle boil\", \"status\": \"in_progress\"}]}"}}
+{"type":"todo/write","data":{"todos":[{"content":"watch the kettle boil","status":"in_progress"}]}}
+{"type":"tool/result","data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"call_5"},"content":[{"type":"tool-result","toolCallId":"call_5","content":[{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"fa3d2366-ffd8-4f75-833d-e4193c7c9749"}},"sourceEventSeqs":[62],"surfaceOp":"append"}
+{"type":"agent/inbox/spliced","data":{"target":"next-step","start":0,"inserted":[{"content":[{"type":"text","text":"Repeated tool call detected:\n- tool: todo_write\n- consecutive_calls: 5\n- arguments: {\"todos\":[{\"content\":\"watch the kettle boil\",\"status\":\"in_progress\"}]}\nThe repeated calls are not making progress. Do not call this tool with these exact arguments again. Inspect the latest result and choose a different action, different arguments, or finish the task if enough evidence has been gathered."}],"source":{"kind":"plugin","plugin":"repeat-tool-reminder","form":"notice","summary":"todo_write × 5"},"role":"user","id":"4ca50ec2-4e31-43c2-bc10-f4bdaa678127"}]}}
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+{"type":"step/start","data":{"turn":1,"step":6}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Repeated tool call detected:\n- tool: todo_write\n- consecutive_calls: 5\n- arguments: {\"todos\":[{\"content\":\"watch the kettle boil\",\"status\":\"in_progress\"}]}\nThe repeated calls are not making progress. Do not call this tool with these exact arguments again. Inspect the latest result and choose a different action, different arguments, or finish the task if enough evidence has been gathered."}],"source":{"kind":"plugin","plugin":"repeat-tool-reminder","form":"notice","summary":"todo_write × 5"},"role":"user","id":"4ca50ec2-4e31-43c2-bc10-f4bdaa678127"},"surfaceOp":"append"}
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+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"text-delta","index":0,"text":"DONE."}}}
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+{"type":"assistant/message","data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"DONE."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"48236fa5-4888-4e27-9e17-05bc246ea622"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[70,71,72,73,74],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/session-query-spill/session.jsonl b/examples/acp-agent/tests/snapshots/session-query-spill/session.jsonl
index 9ba17ca2ee..dfde8ff841 100644
--- a/examples/acp-agent/tests/snapshots/session-query-spill/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/session-query-spill/session.jsonl
@@ -1,38 +1,38 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498768943,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Read request event 5 with session_event_read, verify the complete spill was retained, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"05ed182c-4c88-4019-912e-518ed6e431ba"}]}}
-{"type":"turn/start","seq":1,"time":1785821371103,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821371103,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498768995,"data":{"content":[{"type":"text","text":"Read request event 5 with session_event_read, verify the complete spill was retained, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"05ed182c-4c88-4019-912e-518ed6e431ba"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730422266,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"82025f74-4ec2-4ac7-a90b-5eb18f184abb"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1785730422266,"data":{"title":"Read request event 5 with","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1785498768997,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":1785730422267,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":10,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_session_query_spill","name":"session_event_read","argumentsDelta":"{\"seq\":5}"}}}
-{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}}}}
-{"type":"assistant/chunk","seq":12,"time":1785498769006,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":13,"time":1785730422276,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730422276,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a4ee27a4-32b2-40d1-aeac-6a8bc8fcc2de"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
-{"type":"tool/call","seq":15,"time":1785730422276,"data":{"turn":1,"step":1,"callId":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}}
-{"type":"tool/result","seq":16,"time":1785730422286,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_session_query_spill"},"content":[{"type":"tool-result","toolCallId":"call_session_query_spill","content":[{"type":"text","text":"Session {{sessionId}} — Read request event 5 with\nTarget event seq 5:\n```json\n{\n  \"type\": \"user/message\",\n  \"seq\": 5,\n  \"time\": 1785987646184,\n  \"data\": {\n    \"content\": [\n      {\n        \"type\": \"text\",\n        \"text\": \"Current runtime context. This snapshot supersedes mpts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\"\n        }\n      ]\n    },\n    \"role\": \"user\",\n    \"id\": \"985f57e7-e296-4210-af78-78a485f09894\"\n  },\n  \"surfaceOp\": \"append\"\n}\n```\n\n(Omitted 782 bytes. Full formatted result stored at: /tmp/dsh-acp-snap-035d1d054/session-aa56455bb13a/dfff8c2b8a66-session_event_read.txt. Use read with offset/limit, or grep this path to search within it.)"}],"isError":false}],"role":"user","id":"8f96f03f-4fca-4c3a-ba34-ce891adde50f"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
-{"type":"step/end","seq":17,"time":1785730422286,"data":{"turn":1,"step":1}}
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-{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":20,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"call_verify_session_query_spill","name":"bash","argumentsDelta":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}}}
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-{"type":"tool/call","seq":25,"time":1785730422301,"data":{"turn":1,"step":2,"callId":"call_verify_session_query_spill","name":"bash","arguments":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}}
-{"type":"tool/result","seq":26,"time":1785730422323,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_verify_session_query_spill"},"content":[{"type":"tool-result","toolCallId":"call_verify_session_query_spill","content":[{"type":"text","text":"(no output)\n[exit code: 1]"}],"isError":false}],"role":"user","id":"e43faec5-4511-48d9-8021-c56b7f7cb794"}},"sourceEventSeqs":[25],"surfaceOp":"append"}
-{"type":"step/end","seq":27,"time":1785730422323,"data":{"turn":1,"step":2}}
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-{"type":"assistant/chunk","seq":30,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
-{"type":"assistant/chunk","seq":31,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
-{"type":"assistant/chunk","seq":32,"time":1785498769063,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
-{"type":"assistant/chunk","seq":33,"time":1785730422336,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":34,"time":1785730422337,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"59890792-9e9c-4be8-b4f4-d25ff06855d2"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[29,30,31,32,33],"surfaceOp":"append"}
-{"type":"step/end","seq":35,"time":1785730422337,"data":{"turn":1,"step":3}}
-{"type":"turn/end","seq":36,"time":1785730422337,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Read request event 5 with session_event_read, verify the complete spill was retained, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"05ed182c-4c88-4019-912e-518ed6e431ba"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Read request event 5 with session_event_read, verify the complete spill was retained, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"05ed182c-4c88-4019-912e-518ed6e431ba"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"82025f74-4ec2-4ac7-a90b-5eb18f184abb"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Read request event 5 with","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_session_query_spill","name":"session_event_read","argumentsDelta":"{\"seq\":5}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a4ee27a4-32b2-40d1-aeac-6a8bc8fcc2de"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_session_query_spill","name":"session_event_read","arguments":"{\"seq\":5}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_session_query_spill"},"content":[{"type":"tool-result","toolCallId":"call_session_query_spill","content":[{"type":"text","text":"Session {{sessionId}} — Read request event 5 with\nTarget event seq 5:\n```json\n{\n  \"type\": \"user/message\",\n  \"seq\": 5,\n  \"time\": 1785987646184,\n  \"data\": {\n    \"content\": [\n      {\n        \"type\": \"text\",\n        \"text\": \"Current runtime context. This snapshot supersedes mpts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\"\n        }\n      ]\n    },\n    \"role\": \"user\",\n    \"id\": \"985f57e7-e296-4210-af78-78a485f09894\"\n  },\n  \"surfaceOp\": \"append\"\n}\n```\n\n(Omitted 782 bytes. Full formatted result stored at: /tmp/dsh-acp-snap-035d1d054/session-aa56455bb13a/dfff8c2b8a66-session_event_read.txt. Use read with offset/limit, or grep this path to search within it.)"}],"isError":false}],"role":"user","id":"8f96f03f-4fca-4c3a-ba34-ce891adde50f"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"call_verify_session_query_spill","name":"bash","argumentsDelta":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_verify_session_query_spill","name":"bash","arguments":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_verify_session_query_spill","name":"bash","arguments":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"00965b8a-4e8a-40e4-9418-fdb044859156"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":2,"callId":"call_verify_session_query_spill","name":"bash","arguments":"{\"command\":\"file=$(find /tmp/dsh-acp-snap-035d1d054 -name '*-session_event_read.txt' -type f); grep -q request/header \\\"$file\\\" && grep -q session_event_search \\\"$file\\\" && echo SPILL_CANONICAL_OK\",\"description\":\"Verify complete session query spill\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_verify_session_query_spill"},"content":[{"type":"tool-result","toolCallId":"call_verify_session_query_spill","content":[{"type":"text","text":"(no output)\n[exit code: 1]"}],"isError":false}],"role":"user","id":"e43faec5-4511-48d9-8021-c56b7f7cb794"}},"sourceEventSeqs":[25],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"step/start","data":{"turn":1,"step":3}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"59890792-9e9c-4be8-b4f4-d25ff06855d2"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[29,30,31,32,33],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":3}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl b/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl
index 322d931e1a..389e8b2f61 100644
--- a/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl
@@ -1,28 +1,28 @@
 {"type":"session","version":0,"id":"00000000-0000-0000-0000-000000000000","createdAt":0,"cwd":"/Users/cty/acp-snap-cwd-MABAjO","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498831793,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the write tool (NOT bash) to create session-root.txt in the current directory containing exactly: session root. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"f7d05c95-98f0-44b5-9463-2449682817ff"}]}}
-{"type":"turn/start","seq":1,"time":1785821448088,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821448088,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1784821266397,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498831818,"data":{"content":[{"type":"text","text":"Use the write tool (NOT bash) to create session-root.txt in the current directory containing exactly: session root. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"f7d05c95-98f0-44b5-9463-2449682817ff"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730483789,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"/Users/cty/acp-snap-cwd-MABAjO\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"/Users/cty/acp-snap-cwd-MABAjO\". Some platform temporary areas may also be writable."},{"name":"approval:policy","text":"Approval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}]},"role":"user","id":"7855df4a-1a61-4d6c-bb03-84b80edb0075"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1785730483789,"data":{"title":"Use the write tool (NOT","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1785498831819,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":1785730483790,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":1784821266418,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":10,"time":1784821266418,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_session_root","name":"write","argumentsDelta":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}}
-{"type":"assistant/chunk","seq":11,"time":1784567324143,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}}}
-{"type":"assistant/chunk","seq":12,"time":1785498831828,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":13,"time":1785730483798,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730483799,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8d1a070d-5dce-4e7c-9a7c-dcde32b3d1df"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
-{"type":"tool/call","seq":15,"time":1785730483799,"data":{"turn":1,"step":1,"callId":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}
-{"type":"tool/result","seq":16,"time":1785730483813,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_session_root"},"content":[{"type":"tool-result","toolCallId":"call_session_root","content":[{"type":"text","text":"<path>/Users/cty/acp-snap-cwd-MABAjO/session-root.txt</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false}],"role":"user","id":"06269b5a-d051-4105-9caf-2d588025d07c"},"meta":{"diffs":[]}},"sourceEventSeqs":[15],"surfaceOp":"append"}
-{"type":"step/end","seq":17,"time":1785730483813,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":18,"time":1785730483823,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":19,"time":1784821266442,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":20,"time":1784821266442,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
-{"type":"assistant/chunk","seq":21,"time":1784567324157,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
-{"type":"assistant/chunk","seq":22,"time":1785498831855,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
-{"type":"assistant/chunk","seq":23,"time":1785730483827,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":24,"time":1785730483827,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"87b694cc-1b3d-4b38-9d2c-1a902556327a"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
-{"type":"step/end","seq":25,"time":1785730483827,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":26,"time":1785730483828,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the write tool (NOT bash) to create session-root.txt in the current directory containing exactly: session root. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"f7d05c95-98f0-44b5-9463-2449682817ff"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Use the write tool (NOT bash) to create session-root.txt in the current directory containing exactly: session root. Then reply with exactly the single word DONE."}],"source":{"kind":"user"},"role":"user","id":"f7d05c95-98f0-44b5-9463-2449682817ff"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"/Users/cty/acp-snap-cwd-MABAjO\". Some platform temporary areas may also be writable.\n\nApproval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: workspace-write. Any available operation enforced by the DSH file sandbox may modify files under the session workspace: \"/Users/cty/acp-snap-cwd-MABAjO\". Some platform temporary areas may also be writable."},{"name":"approval:policy","text":"Approval policy: ask. Operations that require approval may ask through the configured answerers; without an available answerer, the request fails closed."}]},"role":"user","id":"7855df4a-1a61-4d6c-bb03-84b80edb0075"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Use the write tool (NOT","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_session_root","name":"write","argumentsDelta":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8d1a070d-5dce-4e7c-9a7c-dcde32b3d1df"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_session_root","name":"write","arguments":"{\"file_path\":\"session-root.txt\",\"content\":\"session root\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_session_root"},"content":[{"type":"tool-result","toolCallId":"call_session_root","content":[{"type":"text","text":"<path>/Users/cty/acp-snap-cwd-MABAjO/session-root.txt</path>\n<type>file</type>\n<content>\nCreated file\n</content>"}],"isError":false}],"role":"user","id":"06269b5a-d051-4105-9caf-2d588025d07c"},"meta":{"diffs":[]}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"87b694cc-1b3d-4b38-9d2c-1a902556327a"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/session-title-after-turn/session.jsonl b/examples/acp-agent/tests/snapshots/session-title-after-turn/session.jsonl
index c20246ef05..e614a5416c 100644
--- a/examples/acp-agent/tests/snapshots/session-title-after-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/session-title-after-turn/session.jsonl
@@ -1,20 +1,20 @@
 {"type":"session","version":0,"id":"session-title-after-turn","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498762928,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly TITLE_DONE. Do not use tools."}],"source":{"kind":"user"},"role":"user","id":"07495f06-71ba-4146-b27c-de2cf46a60fb"}]}}
-{"type":"turn/start","seq":1,"time":1785821360788,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821360788,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1785222848199,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498762955,"data":{"content":[{"type":"text","text":"Reply with exactly TITLE_DONE. Do not use tools."}],"source":{"kind":"user"},"role":"user","id":"07495f06-71ba-4146-b27c-de2cf46a60fb"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730416395,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"d2f80db6-391b-4fe4-bfd8-744807253b12"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1785730416395,"data":{"title":"Reply with exactly TITLE_DONE. Do","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1785498762958,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly TITLE_DONE. Do not use tools."}],"source":{"kind":"user"},"role":"user","id":"07495f06-71ba-4146-b27c-de2cf46a60fb"}]}}
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+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"d2f80db6-391b-4fe4-bfd8-744807253b12"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly TITLE_DONE. Do","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"session/title-llm-request","data":{"titleProvider":"session-title-first-prompt-llm","messageSeqs":[4],"route":{"provider":"title-replay","model":"title-model"},"system":"Create a concise title for an AI coding-assistant session from the supplied human messages.\nReturn only the title on one line, **in plain text of natural language**, with no quotes, prefix, explanation, Markdown, XML, or terminal control codes. No code is allowed.\nUse the language of the messages.\nAim for about 5 words in non-CJK languages or 10 CJK characters.","messages":[{"content":[{"type":"text","text":"Generate the session title from this JSON array of human messages:\n[{\"seq\":4,\"text\":\"Reply with exactly TITLE_DONE. Do not use tools.\"}]"}],"source":{"kind":"plugin","plugin":"dsh-session-title-llm"},"role":"user","id":"626a7388-f08d-4d7b-b6c1-51056828182e"}],"maxTokens":32}}
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+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"session/title","data":{"title":"Late durable session title","messageSeqs":[4],"source":{"kind":"provider","provider":"session-title-first-prompt-llm","model":{"provider":"title-replay","model":"title-model"}}}}
diff --git a/examples/acp-agent/tests/snapshots/skill-load/session.jsonl b/examples/acp-agent/tests/snapshots/skill-load/session.jsonl
index ec369b492a..ebdf83eab6 100644
--- a/examples/acp-agent/tests/snapshots/skill-load/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/skill-load/session.jsonl
@@ -1,35 +1,35 @@
 {"type":"session","version":0,"id":"9eb4181f-2d05-49d3-98fc-3711fe2f5664","createdAt":1783654655599,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498773710,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Load the snapshot-skill skill with the skill tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"0ca31b92-27ac-451d-98d3-d1e5f605454b"}]}}
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-{"type":"step/start","seq":3,"time":1785498773754,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498773754,"data":{"content":[{"type":"text","text":"Load the snapshot-skill skill with the skill tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"0ca31b92-27ac-451d-98d3-d1e5f605454b"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785498773755,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"3fc7e2f8-90fc-496c-b516-700cef1d86f1"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1785730426818,"data":{"content":[{"type":"text","text":"<system-reminder>\nA skill is a reusable set of task-specific instructions. The following skills are available in this session:\n\n<available_skills>\n- `model-only-skill`: Prove user-disabled skills remain available to the model.\n- `snapshot-skill`: Exercise project skill discovery and loading in snapshot tests.\n</available_skills>\n\nIf the user names a skill, or the task clearly matches a skill's description, call the `skill` tool with the exact skill name before taking task actions. Load all applicable skills, then follow their full instructions. This catalog contains summaries only; do not infer or follow a skill's instructions until it has been loaded.\nA user may also invoke a skill directly; its <skill_content> block then appears in this conversation. Follow it, and do not call the `skill` tool again for that skill.\n</system-reminder>"}],"source":{"kind":"skill-catalog","form":"catalog","entries":[{"name":"model-only-skill","description":"Prove user-disabled skills remain available to the model."},{"name":"snapshot-skill","description":"Exercise project skill discovery and loading in snapshot tests."}]},"role":"user","id":"60880315-9799-44c8-8a99-e6fe9ee5bdc5"},"surfaceOp":"append"}
-{"type":"session/title","seq":7,"time":1785730426818,"data":{"title":"Load the snapshot-skill skill with","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":8,"time":1785498773756,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":9,"time":1785730426819,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":10,"time":1783654655609,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"assistant/chunk","seq":11,"time":1783654655609,"data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":"Load the requested skill."}}}
-{"type":"assistant/chunk","seq":12,"time":1783654655609,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":13,"time":1783654655609,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":1,"id":"call_skill_load","name":"skill","argumentsDelta":"{\"name\":\"snapshot-skill\"}"}}}
-{"type":"assistant/chunk","seq":14,"time":1783654655609,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"Load the requested skill."}}}}
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-{"type":"assistant/message","seq":18,"time":1785730426828,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Load the requested skill."},{"type":"tool-call","id":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3fd7a47e-84c9-4d31-aa95-9939671ba0a5"},"usage":{"inputTokens":100,"outputTokens":20,"cacheReadTokens":0,"reasoningTokens":5}},"sourceEventSeqs":[10,11,12,13,14,15,16,17],"surfaceOp":"append"}
-{"type":"tool/call","seq":19,"time":1785730426828,"data":{"turn":1,"step":1,"callId":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}}
-{"type":"tool/result","seq":20,"time":1785730426838,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_skill_load"},"content":[{"type":"tool-result","toolCallId":"call_skill_load","content":[{"type":"text","text":"<skill_content name=\"snapshot-skill\">\n<skill_resources>\nBase directory for this skill: {{cwd}}/.dsh/skills/snapshot-skill\nResolve relative paths mentioned by this skill against the base directory before using them. Load referenced resources only as needed.\n</skill_resources>\n\n<skill_instructions>\nFollow these snapshot-only instructions.\nResolve referenced resources relative to this skill directory.\n</skill_instructions>\n</skill_content>"}],"isError":false}],"role":"user","id":"1609c2f6-3bc5-4ade-95dd-29e7f7565987"}},"sourceEventSeqs":[19],"surfaceOp":"append"}
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-{"type":"assistant/chunk","seq":26,"time":1783654655611,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":1,"text":"DONE"}}}
-{"type":"assistant/chunk","seq":27,"time":1783654655611,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The skill is loaded."}}}}
-{"type":"assistant/chunk","seq":28,"time":1784903324956,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
-{"type":"assistant/chunk","seq":29,"time":1785498773786,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":180,"outputTokens":10,"cacheReadTokens":0,"reasoningTokens":4}}}}
-{"type":"assistant/chunk","seq":30,"time":1785730426852,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":31,"time":1785730426853,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The skill is loaded."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"abdbdc3b-06a3-4b5f-b807-15d6566154a0"},"usage":{"inputTokens":180,"outputTokens":10,"cacheReadTokens":0,"reasoningTokens":4}},"sourceEventSeqs":[23,24,25,26,27,28,29,30],"surfaceOp":"append"}
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-{"type":"turn/end","seq":33,"time":1785730426853,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Load the snapshot-skill skill with the skill tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"0ca31b92-27ac-451d-98d3-d1e5f605454b"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Load the snapshot-skill skill with the skill tool, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"0ca31b92-27ac-451d-98d3-d1e5f605454b"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"3fc7e2f8-90fc-496c-b516-700cef1d86f1"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<system-reminder>\nA skill is a reusable set of task-specific instructions. The following skills are available in this session:\n\n<available_skills>\n- `model-only-skill`: Prove user-disabled skills remain available to the model.\n- `snapshot-skill`: Exercise project skill discovery and loading in snapshot tests.\n</available_skills>\n\nIf the user names a skill, or the task clearly matches a skill's description, call the `skill` tool with the exact skill name before taking task actions. Load all applicable skills, then follow their full instructions. This catalog contains summaries only; do not infer or follow a skill's instructions until it has been loaded.\nA user may also invoke a skill directly; its <skill_content> block then appears in this conversation. Follow it, and do not call the `skill` tool again for that skill.\n</system-reminder>"}],"source":{"kind":"skill-catalog","form":"catalog","entries":[{"name":"model-only-skill","description":"Prove user-disabled skills remain available to the model."},{"name":"snapshot-skill","description":"Exercise project skill discovery and loading in snapshot tests."}]},"role":"user","id":"60880315-9799-44c8-8a99-e6fe9ee5bdc5"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Load the snapshot-skill skill with","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"reasoning-delta","index":0,"text":"Load the requested skill."}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":1,"id":"call_skill_load","name":"skill","argumentsDelta":"{\"name\":\"snapshot-skill\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"Load the requested skill."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":100,"outputTokens":20,"cacheReadTokens":0,"reasoningTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Load the requested skill."},{"type":"tool-call","id":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3fd7a47e-84c9-4d31-aa95-9939671ba0a5"},"usage":{"inputTokens":100,"outputTokens":20,"cacheReadTokens":0,"reasoningTokens":5}},"sourceEventSeqs":[10,11,12,13,14,15,16,17],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_skill_load","name":"skill","arguments":"{\"name\":\"snapshot-skill\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_skill_load"},"content":[{"type":"tool-result","toolCallId":"call_skill_load","content":[{"type":"text","text":"<skill_content name=\"snapshot-skill\">\n<skill_resources>\nBase directory for this skill: {{cwd}}/.dsh/skills/snapshot-skill\nResolve relative paths mentioned by this skill against the base directory before using them. Load referenced resources only as needed.\n</skill_resources>\n\n<skill_instructions>\nFollow these snapshot-only instructions.\nResolve referenced resources relative to this skill directory.\n</skill_instructions>\n</skill_content>"}],"isError":false}],"role":"user","id":"1609c2f6-3bc5-4ade-95dd-29e7f7565987"}},"sourceEventSeqs":[19],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"reasoning-delta","index":0,"text":"The skill is loaded."}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":1,"text":"DONE"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The skill is loaded."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":180,"outputTokens":10,"cacheReadTokens":0,"reasoningTokens":4}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The skill is loaded."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"abdbdc3b-06a3-4b5f-b807-15d6566154a0"},"usage":{"inputTokens":180,"outputTokens":10,"cacheReadTokens":0,"reasoningTokens":4}},"sourceEventSeqs":[23,24,25,26,27,28,29,30],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-child-question-rejection/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-child-question-rejection/session.1.jsonl
index f718b98314..07263b593a 100644
--- a/examples/acp-agent/tests/snapshots/subagent-child-question-rejection/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-child-question-rejection/session.1.jsonl
@@ -1,30 +1,30 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-child-question-rejection/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-child-question-rejection/session.jsonl
index f69fb857ac..e6b1415eb6 100644
--- a/examples/acp-agent/tests/snapshots/subagent-child-question-rejection/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-child-question-rejection/session.jsonl
@@ -1,28 +1,28 @@
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+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_question_child","name":"subagent","arguments":"{\"description\":\"Check deployment question\",\"prompt\":\"Call ask_user_question once to ask whether deployment should use the CUDA fallback. If the tool returns an error, include the unresolved question verbatim in your final result.\", \"run_in_background\":false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f8909de9-23ae-4dbe-a8c1-eaf1e8f2aba5"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_question_child","name":"subagent","arguments":"{\"description\":\"Check deployment question\",\"prompt\":\"Call ask_user_question once to ask whether deployment should use the CUDA fallback. If the tool returns an error, include the unresolved question verbatim in your final result.\", \"run_in_background\":false}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_question_child"},"content":[{"type":"tool-result","toolCallId":"call_question_child","content":[{"type":"text","text":"UNRESOLVED: Should deployment use the CUDA fallback?"}],"isError":false}],"role":"user","id":"1f6384c7-3d6b-4472-968f-2a4a4e3aba79"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"PARENT_COMPLETED"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"PARENT_COMPLETED"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"PARENT_COMPLETED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"700b9e56-965e-406a-bf5c-2db06b96c536"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
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+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-continuable-inheritance/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-continuable-inheritance/session.1.jsonl
index bd9557666f..841bdb291d 100644
--- a/examples/acp-agent/tests/snapshots/subagent-continuable-inheritance/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-continuable-inheritance/session.1.jsonl
@@ -1,22 +1,22 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1789000001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"subagent/descriptor","seq":0,"time":1786333735890,"data":{"version":2,"mode":"continuable","provider":"spawn","label":"Reply with CHILD_OK","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
-{"type":"session/end-seed","seq":1,"time":1786333735890,"data":{}}
-{"type":"sandbox/mode","seq":2,"time":1786333735890,"data":{"mode":"read-only","source":"delegation"}}
-{"type":"approval/policy","seq":3,"time":1786357527742,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":4,"time":1786357527743,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"42af19c7-e234-4752-93d4-bd9c943c1fe7"}]}}
-{"type":"turn/start","seq":5,"time":1786357527743,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":6,"time":1786357527743,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":7,"time":1786357527768,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":8,"time":1786333735916,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"42af19c7-e234-4752-93d4-bd9c943c1fe7"},"surfaceOp":"append"}
-{"type":"user/message","seq":9,"time":1786357527769,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"1b760052-ffcb-44d2-aae2-fd73d7c444f1"},"surfaceOp":"append"}
-{"type":"session/title","seq":10,"time":1786357527769,"data":{"title":"Reply with exactly the word","messageSeqs":[8],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":11,"time":1786333735916,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":12,"time":1786333735916,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":13,"time":1786333735920,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":14,"time":1786333735921,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_OK"}}}
-{"type":"assistant/chunk","seq":15,"time":1786333735921,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_OK"}}}}
-{"type":"assistant/chunk","seq":16,"time":1786333735921,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":17,"time":1786333735921,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":18,"time":1786333735921,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e2b94008-b067-4ca7-a576-6b4a9060cd83"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[13,14,15,16,17],"surfaceOp":"append"}
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-{"type":"turn/end","seq":20,"time":1786333735921,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"continuable","provider":"spawn","label":"Reply with CHILD_OK","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
+{"type":"session/end-seed","data":{}}
+{"type":"sandbox/mode","data":{"mode":"read-only","source":"delegation"}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"42af19c7-e234-4752-93d4-bd9c943c1fe7"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"42af19c7-e234-4752-93d4-bd9c943c1fe7"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"1b760052-ffcb-44d2-aae2-fd73d7c444f1"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly the word","messageSeqs":[8],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_OK"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e2b94008-b067-4ca7-a576-6b4a9060cd83"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[13,14,15,16,17],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-continuable-inheritance/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-continuable-inheritance/session.jsonl
index 293f9c3b83..1081e1fa98 100644
--- a/examples/acp-agent/tests/snapshots/subagent-continuable-inheritance/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-continuable-inheritance/session.jsonl
@@ -1,42 +1,42 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1789000000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"sandbox/mode","seq":0,"time":1786333735842,"data":{"mode":"read-only"}}
-{"type":"agent/inbox/spliced","seq":1,"time":1786333735845,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. 2. Reply with the single word DONE. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"d554122c-d857-4de0-aea0-6452f260d032"}]}}
-{"type":"turn/start","seq":2,"time":1786333735845,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786333735845,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":4,"time":1786333735878,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1786333735878,"data":{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. 2. Reply with the single word DONE. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"d554122c-d857-4de0-aea0-6452f260d032"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1786333735878,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"f931abf5-bb3a-44b4-8fe2-2d06e8766184"},"surfaceOp":"append"}
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-{"type":"request/header","seq":8,"time":1786333735879,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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-{"type":"assistant/chunk","seq":11,"time":1786333735884,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_bg_start","name":"subagent","argumentsDelta":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}
-{"type":"assistant/chunk","seq":12,"time":1786333735884,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}}
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-{"type":"assistant/chunk","seq":14,"time":1786333735884,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
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-{"type":"assistant/message","seq":25,"time":1786333735904,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4057a08e-b50e-45e7-beb0-c74485f2b7d6"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[20,21,22,23,24],"surfaceOp":"append"}
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-{"type":"agent/inbox/spliced","seq":28,"time":1786374357751,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more."},{"type":"text","text":"Its closing message:"},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"subagent-settled","form":"notice","summary":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more.","senderSessionId":"33333333-3333-4333-8333-333333333333"},"role":"user","id":"e0bd4902-daba-4e23-bfcb-9e102fdd203d"}]}}
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-{"type":"step/start","seq":31,"time":1786374357758,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":32,"time":1786374357758,"data":{"content":[{"type":"text","text":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more."},{"type":"text","text":"Its closing message:"},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"subagent-settled","form":"notice","summary":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more.","senderSessionId":"33333333-3333-4333-8333-333333333333"},"role":"user","id":"e0bd4902-daba-4e23-bfcb-9e102fdd203d"},"surfaceOp":"append"}
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-{"type":"assistant/chunk","seq":34,"time":1786374357764,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"SUBAGENT_SETTLED_NOTED"}}}
-{"type":"assistant/chunk","seq":35,"time":1786374357764,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SUBAGENT_SETTLED_NOTED"}}}}
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-{"type":"assistant/chunk","seq":37,"time":1786374357764,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":38,"time":1786374357764,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"SUBAGENT_SETTLED_NOTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bbe5ef7b-2a3a-47f4-8475-60945b31a373"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[33,34,35,36,37],"surfaceOp":"append"}
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-{"type":"turn/end","seq":40,"time":1786374357765,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"sandbox/mode","data":{"mode":"read-only"}}
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+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. 2. Reply with the single word DONE. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"d554122c-d857-4de0-aea0-6452f260d032"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"f931abf5-bb3a-44b4-8fe2-2d06e8766184"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Follow these steps exactly, then","messageSeqs":[5],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_bg_start","name":"subagent","argumentsDelta":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8ab58a42-e74c-4121-a6ca-63696e592287"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_bg_start"},"content":[{"type":"tool-result","toolCallId":"call_bg_start","content":[{"type":"text","text":"started subagent 33333333-3333-4333-8333-333333333333"}],"isError":false}],"role":"user","id":"3478555e-f0d0-4ec1-a7e4-a15ab24b9ecf"}},"sourceEventSeqs":[16],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4057a08e-b50e-45e7-beb0-c74485f2b7d6"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[20,21,22,23,24],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more."},{"type":"text","text":"Its closing message:"},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"subagent-settled","form":"notice","summary":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more.","senderSessionId":"33333333-3333-4333-8333-333333333333"},"role":"user","id":"e0bd4902-daba-4e23-bfcb-9e102fdd203d"}]}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more."},{"type":"text","text":"Its closing message:"},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"subagent-settled","form":"notice","summary":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more.","senderSessionId":"33333333-3333-4333-8333-333333333333"},"role":"user","id":"e0bd4902-daba-4e23-bfcb-9e102fdd203d"},"surfaceOp":"append"}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"SUBAGENT_SETTLED_NOTED"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SUBAGENT_SETTLED_NOTED"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"SUBAGENT_SETTLED_NOTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bbe5ef7b-2a3a-47f4-8475-60945b31a373"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[33,34,35,36,37],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-continuable/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-continuable/session.1.jsonl
index 9352ca6fb9..bc1367c41e 100644
--- a/examples/acp-agent/tests/snapshots/subagent-continuable/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-continuable/session.1.jsonl
@@ -1,38 +1,38 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1789000001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"subagent/descriptor","seq":0,"time":1785544945198,"data":{"version":2,"mode":"continuable","provider":"spawn","label":"Reply with CHILD_OK","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
-{"type":"session/end-seed","seq":1,"time":1785544945198,"data":{}}
-{"type":"approval/policy","seq":2,"time":1786357526242,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786357526243,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c67a308f-d867-424e-b198-c9f464228703"}]}}
-{"type":"turn/start","seq":4,"time":1786357526243,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":5,"time":1785730917192,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"agent/inbox/spliced","seq":6,"time":1785821409076,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Now reply with exactly SECOND_OK."}],"source":{"kind":"coordinator","form":"relay","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"e7d15a94-203d-43ab-8279-4e22d5218feb"}]}}
-{"type":"agent/inbox/spliced","seq":7,"time":1786357526278,"data":{"target":"next-turn","start":1,"inserted":[{"content":[{"type":"text","text":"Now reply with exactly THIRD_OK."}],"source":{"kind":"coordinator","form":"relay","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"755c76db-6ee8-432d-a2d0-f8a3b7914e08"}]}}
-{"type":"step/start","seq":8,"time":1786357526284,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":9,"time":1785730917198,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c67a308f-d867-424e-b198-c9f464228703"},"surfaceOp":"append"}
-{"type":"user/message","seq":10,"time":1786357526284,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"7f1d7407-d9bc-4ec6-ae42-a8767e0e1153"},"surfaceOp":"append"}
-{"type":"session/title","seq":11,"time":1786357526284,"data":{"title":"Reply with exactly the word","messageSeqs":[9],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":12,"time":1785730917198,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":13,"time":1785730917199,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":14,"time":1785730696668,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":15,"time":1789000000010,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_OK"}}}
-{"type":"assistant/chunk","seq":16,"time":1789000000011,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_OK"}}}}
-{"type":"assistant/chunk","seq":17,"time":1789000000012,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":18,"time":1785730451397,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":19,"time":1785730696668,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"178ea526-9e19-49d2-b3b0-57b682320028"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[14,15,16,17,18],"surfaceOp":"append"}
-{"type":"step/end","seq":20,"time":1785730696668,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":21,"time":1785730696669,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"turn/start","seq":22,"time":1785821409092,"data":{"turn":2}}
-{"type":"agent/inbox/spliced","seq":23,"time":1785821409092,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":24,"time":1785730696682,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":25,"time":1785730696682,"data":{"content":[{"type":"text","text":"Now reply with exactly SECOND_OK."}],"source":{"kind":"coordinator","form":"relay","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"e7d15a94-203d-43ab-8279-4e22d5218feb"},"surfaceOp":"append"}
-{"type":"assistant/chunk","seq":26,"time":1785730696686,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":27,"time":1785730696686,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"SECOND_OK"}}}
-{"type":"assistant/chunk","seq":28,"time":1789000000023,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SECOND_OK"}}}}
-{"type":"assistant/chunk","seq":29,"time":1785730451421,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":30,"time":1785730451421,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":31,"time":1785730696686,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"SECOND_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ced209bf-5d6d-4880-b187-18cb816a150c"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[26,27,28,29,30],"surfaceOp":"append"}
-{"type":"step/end","seq":32,"time":1785730696686,"data":{"turn":2,"step":1}}
-{"type":"turn/end","seq":33,"time":1785730696686,"data":{"turn":2,"reason":{"kind":"completed"}}}
-{"type":"turn/start","seq":34,"time":1785821409110,"data":{"turn":3}}
-{"type":"agent/inbox/spliced","seq":35,"time":1785821409110,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"turn/end","seq":36,"time":1785821409122,"data":{"turn":3,"reason":{"kind":"error","error":{"message":"snapshot disk full","code":"UNKNOWN"}}}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"continuable","provider":"spawn","label":"Reply with CHILD_OK","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
+{"type":"session/end-seed","data":{}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c67a308f-d867-424e-b198-c9f464228703"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Now reply with exactly SECOND_OK."}],"source":{"kind":"coordinator","form":"relay","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"e7d15a94-203d-43ab-8279-4e22d5218feb"}]}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":1,"inserted":[{"content":[{"type":"text","text":"Now reply with exactly THIRD_OK."}],"source":{"kind":"coordinator","form":"relay","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"755c76db-6ee8-432d-a2d0-f8a3b7914e08"}]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c67a308f-d867-424e-b198-c9f464228703"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"7f1d7407-d9bc-4ec6-ae42-a8767e0e1153"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly the word","messageSeqs":[9],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_OK"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"178ea526-9e19-49d2-b3b0-57b682320028"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[14,15,16,17,18],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Now reply with exactly SECOND_OK."}],"source":{"kind":"coordinator","form":"relay","senderSessionId":"11111111-1111-4111-8111-111111111111"},"role":"user","id":"e7d15a94-203d-43ab-8279-4e22d5218feb"},"surfaceOp":"append"}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"SECOND_OK"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SECOND_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"SECOND_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"ced209bf-5d6d-4880-b187-18cb816a150c"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[26,27,28,29,30],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":3}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"turn/end","data":{"turn":3,"reason":{"kind":"error","error":{"message":"snapshot disk full","code":"UNKNOWN"}}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-continuable/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-continuable/session.jsonl
index 60a55d1373..ceb9866984 100644
--- a/examples/acp-agent/tests/snapshots/subagent-continuable/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-continuable/session.jsonl
@@ -1,71 +1,71 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1789000000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785730451297,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Follow these steps exactly, then stop. 1. Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. 2. Call send_message twice in a row, both with the subagent id from step 1: first with message 'Now reply with exactly SECOND_OK.', then with message 'Now reply with exactly THIRD_OK.'. 3. Call send_message with subagent_id exactly '22222222-2222-4222-8222-222222222222' (a subagent that does not exist) and message 'Please continue.', and observe that it fails. 4. Reply with the single word DONE. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"579d3d6d-a57e-4d55-9b48-05832a79d9f8"}]}}
-{"type":"turn/start","seq":1,"time":1785821408972,"data":{"turn":1}}
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-{"type":"step/start","seq":3,"time":1785730451327,"data":{"turn":1,"step":1}}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.1.jsonl
index 2c1952dfb2..4cff06ae04 100644
--- a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.1.jsonl
@@ -1,30 +1,30 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.2.jsonl b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.2.jsonl
index 6640e116eb..381435c203 100644
--- a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.2.jsonl
@@ -1,30 +1,30 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.jsonl
index 147dc1a06f..0d1a67fced 100644
--- a/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-depth-two-rejection/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/subagent-fork-in-process/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-fork-in-process/session.1.jsonl
index c663606bbd..c82a3b3d11 100644
--- a/examples/acp-agent/tests/snapshots/subagent-fork-in-process/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-fork-in-process/session.1.jsonl
@@ -1,42 +1,42 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-fork-in-process/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-fork-in-process/session.jsonl
index c7eb17a0cb..fdd257d93e 100644
--- a/examples/acp-agent/tests/snapshots/subagent-fork-in-process/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-fork-in-process/session.jsonl
@@ -1,50 +1,50 @@
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diff --git a/examples/acp-agent/tests/snapshots/subagent-list-agents/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-list-agents/session.1.jsonl
index d81f1964b2..4c94faa947 100644
--- a/examples/acp-agent/tests/snapshots/subagent-list-agents/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-list-agents/session.1.jsonl
@@ -1,21 +1,21 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1789000001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"subagent/descriptor","seq":0,"time":1785531795641,"data":{"version":2,"mode":"continuable","provider":"spawn","label":"Reply with CHILD_OK","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
-{"type":"session/end-seed","seq":1,"time":1785531795641,"data":{}}
-{"type":"approval/policy","seq":2,"time":1786357532080,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786357532080,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2a46160e-89d3-433b-bf04-66fb0313abfa"}]}}
-{"type":"turn/start","seq":4,"time":1786357532081,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":5,"time":1786357532081,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":6,"time":1786357532106,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":7,"time":1785730454835,"data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2a46160e-89d3-433b-bf04-66fb0313abfa"},"surfaceOp":"append"}
-{"type":"user/message","seq":8,"time":1786357532106,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"5fda3f8d-fbac-4878-a9e3-9953a4e1da09"},"surfaceOp":"append"}
-{"type":"session/title","seq":9,"time":1786357532106,"data":{"title":"Reply with exactly the word","messageSeqs":[7],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":10,"time":1785730454835,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":11,"time":1785730454835,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":12,"time":1789000000007,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":13,"time":1789000000008,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_OK"}}}
-{"type":"assistant/chunk","seq":14,"time":1785531795683,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_OK"}}}}
-{"type":"assistant/chunk","seq":15,"time":1785531795683,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":16,"time":1785730454843,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":17,"time":1785730454843,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f6a952dd-2d09-4b5c-b8ae-5456cfdfeab0"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[12,13,14,15,16],"surfaceOp":"append"}
-{"type":"step/end","seq":18,"time":1785730454843,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":19,"time":1785730454844,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"continuable","provider":"spawn","label":"Reply with CHILD_OK","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
+{"type":"session/end-seed","data":{}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2a46160e-89d3-433b-bf04-66fb0313abfa"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly the word CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2a46160e-89d3-433b-bf04-66fb0313abfa"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"5fda3f8d-fbac-4878-a9e3-9953a4e1da09"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly the word","messageSeqs":[7],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_OK"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f6a952dd-2d09-4b5c-b8ae-5456cfdfeab0"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[12,13,14,15,16],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-list-agents/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-list-agents/session.jsonl
index 44549b2e99..057b4407f4 100644
--- a/examples/acp-agent/tests/snapshots/subagent-list-agents/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-list-agents/session.jsonl
@@ -1,64 +1,64 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1789000000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785730454756,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. Then reply with the single word STARTED. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"356b3b62-c8b8-4d2a-84d7-7df1b6e4811e"}]}}
-{"type":"turn/start","seq":1,"time":1785821412725,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821412725,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1785730454783,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785730454783,"data":{"content":[{"type":"text","text":"Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. Then reply with the single word STARTED. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"356b3b62-c8b8-4d2a-84d7-7df1b6e4811e"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730454783,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"9be42fb0-f0d0-4ab9-a232-fb753f7db482"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1785730454783,"data":{"title":"Call the subagent tool once","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1785730454784,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":1785730454784,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":1789000000007,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":10,"time":1789000000008,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_bg_start","name":"subagent","argumentsDelta":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}
-{"type":"assistant/chunk","seq":11,"time":1785531795632,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}}
-{"type":"assistant/chunk","seq":12,"time":1785531795632,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":13,"time":1785730454793,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730454793,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c8802574-4e43-4ee7-8648-5a132935b5dc"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
-{"type":"tool/call","seq":15,"time":1785730454793,"data":{"turn":1,"step":1,"callId":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}
-{"type":"tool/result","seq":16,"time":1785730454804,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_bg_start"},"content":[{"type":"tool-result","toolCallId":"call_bg_start","content":[{"type":"text","text":"started subagent 33333333-3333-4333-8333-333333333333"}],"isError":false}],"role":"user","id":"c83395ad-93c6-4899-9ae1-8d29f92d4dde"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
-{"type":"step/end","seq":17,"time":1785730454804,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":18,"time":1785730454814,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":19,"time":1789000000017,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":20,"time":1789000000018,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"STARTED"}}}
-{"type":"assistant/chunk","seq":21,"time":1785531795656,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"STARTED"}}}}
-{"type":"assistant/chunk","seq":22,"time":1785531795656,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":23,"time":1785730454820,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":24,"time":1785730454820,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"STARTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"1fefe87b-4c3c-49b0-860c-8097193f9567"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
-{"type":"step/end","seq":25,"time":1785730454821,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":26,"time":1785730454821,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":27,"time":1786011499211,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more."},{"type":"text","text":"Its closing message:"},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"subagent-settled","form":"notice","summary":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more.","senderSessionId":"33333333-3333-4333-8333-333333333333"},"role":"user","id":"9275a12c-bf9a-48e2-b33b-4fc484e936cb"}]}}
-{"type":"turn/start","seq":28,"time":1786011499211,"data":{"turn":2}}
-{"type":"agent/inbox/spliced","seq":29,"time":1786011499211,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":30,"time":1786012470343,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":31,"time":1786012470343,"data":{"content":[{"type":"text","text":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more."},{"type":"text","text":"Its closing message:"},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"subagent-settled","form":"notice","summary":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more.","senderSessionId":"33333333-3333-4333-8333-333333333333"},"role":"user","id":"9275a12c-bf9a-48e2-b33b-4fc484e936cb"},"surfaceOp":"append"}
-{"type":"assistant/chunk","seq":32,"time":1786012470346,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":33,"time":1786011499224,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"SUBAGENT_SETTLED_NOTED"}}}
-{"type":"assistant/chunk","seq":34,"time":1786011499224,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SUBAGENT_SETTLED_NOTED"}}}}
-{"type":"assistant/chunk","seq":35,"time":1786011499224,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":36,"time":1786011499224,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":37,"time":1786012470346,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"SUBAGENT_SETTLED_NOTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4620e8c0-dd13-4a2f-87dc-f4b66aa51219"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[32,33,34,35,36],"surfaceOp":"append"}
-{"type":"step/end","seq":38,"time":1786012470346,"data":{"turn":2,"step":1}}
-{"type":"turn/end","seq":39,"time":1786012470346,"data":{"turn":2,"reason":{"kind":"completed"}}}
-{"type":"agent/inbox/spliced","seq":40,"time":1786012470360,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call list_agents once with scope set to descendants and observe the subagent you started. Then call interrupt_agent once with agent_id set to 33333333-3333-4333-8333-333333333333. Then reply with the single word DONE. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"7a2a86d0-80a3-4db5-822f-2d3fcbc16e11"}]}}
-{"type":"turn/start","seq":41,"time":1786011499224,"data":{"turn":3}}
-{"type":"agent/inbox/spliced","seq":42,"time":1786011499224,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":43,"time":1786011499234,"data":{"turn":3,"step":1}}
-{"type":"user/message","seq":44,"time":1786011499234,"data":{"content":[{"type":"text","text":"Call list_agents once with scope set to descendants and observe the subagent you started. Then call interrupt_agent once with agent_id set to 33333333-3333-4333-8333-333333333333. Then reply with the single word DONE. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"7a2a86d0-80a3-4db5-822f-2d3fcbc16e11"},"surfaceOp":"append"}
-{"type":"assistant/chunk","seq":45,"time":1786011499238,"data":{"turn":3,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":46,"time":1786011499238,"data":{"turn":3,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_list","name":"list_agents","argumentsDelta":"{}"}}}
-{"type":"assistant/chunk","seq":47,"time":1785531795715,"data":{"turn":3,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_list","name":"list_agents","arguments":"{}"}}}}
-{"type":"assistant/chunk","seq":48,"time":1785536135106,"data":{"turn":3,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":49,"time":1785730454907,"data":{"turn":3,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":50,"time":1786011499238,"data":{"turn":3,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_list","name":"list_agents","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"d3402e92-2f7e-4cd5-9537-ae9beedeecab"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[45,46,47,48,49],"surfaceOp":"append"}
-{"type":"tool/call","seq":51,"time":1786011499238,"data":{"turn":3,"step":1,"callId":"call_list","name":"list_agents","arguments":"{}"}}
-{"type":"tool/result","seq":52,"time":1786011499267,"data":{"turn":3,"step":1,"message":{"source":{"kind":"tool","callId":"call_list"},"content":[{"type":"tool-result","toolCallId":"call_list","content":[{"type":"text","text":"33333333-3333-4333-8333-333333333333 [ready] — Reply with CHILD_OK"}],"isError":false}],"role":"user","id":"8ae233de-8fde-48d7-a9d0-0d9a480a00d0"}},"sourceEventSeqs":[51],"surfaceOp":"append"}
-{"type":"step/end","seq":53,"time":1785730454908,"data":{"turn":3,"step":1}}
-{"type":"step/start","seq":54,"time":1786011499275,"data":{"turn":3,"step":2}}
-{"type":"assistant/chunk","seq":55,"time":1786011499279,"data":{"turn":3,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":56,"time":1786011499279,"data":{"turn":3,"step":2,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
-{"type":"assistant/chunk","seq":57,"time":1786011499279,"data":{"turn":3,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
-{"type":"assistant/chunk","seq":58,"time":1786011499279,"data":{"turn":3,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
-{"type":"assistant/chunk","seq":59,"time":1786011499279,"data":{"turn":3,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":60,"time":1786011499279,"data":{"turn":3,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3ac0f29f-72ae-44fb-9414-974470095618"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[55,56,57,58,59],"surfaceOp":"append"}
-{"type":"step/end","seq":61,"time":1786011499279,"data":{"turn":3,"step":2}}
-{"type":"turn/end","seq":62,"time":1786011499279,"data":{"turn":3,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. Then reply with the single word STARTED. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"356b3b62-c8b8-4d2a-84d7-7df1b6e4811e"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Call the subagent tool once with run_in_background set to true, description 'Reply with CHILD_OK', and prompt 'Reply with exactly the word CHILD_OK and nothing else.'. Then reply with the single word STARTED. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"356b3b62-c8b8-4d2a-84d7-7df1b6e4811e"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"9be42fb0-f0d0-4ab9-a232-fb753f7db482"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Call the subagent tool once","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_bg_start","name":"subagent","argumentsDelta":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"c8802574-4e43-4ee7-8648-5a132935b5dc"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_bg_start","name":"subagent","arguments":"{\"description\": \"Reply with CHILD_OK\", \"prompt\": \"Reply with exactly the word CHILD_OK and nothing else.\", \"run_in_background\": true}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_bg_start"},"content":[{"type":"tool-result","toolCallId":"call_bg_start","content":[{"type":"text","text":"started subagent 33333333-3333-4333-8333-333333333333"}],"isError":false}],"role":"user","id":"c83395ad-93c6-4899-9ae1-8d29f92d4dde"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"STARTED"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"STARTED"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"STARTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"1fefe87b-4c3c-49b0-860c-8097193f9567"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more."},{"type":"text","text":"Its closing message:"},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"subagent-settled","form":"notice","summary":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more.","senderSessionId":"33333333-3333-4333-8333-333333333333"},"role":"user","id":"9275a12c-bf9a-48e2-b33b-4fc484e936cb"}]}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more."},{"type":"text","text":"Its closing message:"},{"type":"text","text":"CHILD_OK"}],"source":{"kind":"subagent-settled","form":"notice","summary":"Background subagent 33333333-3333-4333-8333-333333333333 finished and will do no further work unless you send it more.","senderSessionId":"33333333-3333-4333-8333-333333333333"},"role":"user","id":"9275a12c-bf9a-48e2-b33b-4fc484e936cb"},"surfaceOp":"append"}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"SUBAGENT_SETTLED_NOTED"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"SUBAGENT_SETTLED_NOTED"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"SUBAGENT_SETTLED_NOTED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4620e8c0-dd13-4a2f-87dc-f4b66aa51219"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[32,33,34,35,36],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call list_agents once with scope set to descendants and observe the subagent you started. Then call interrupt_agent once with agent_id set to 33333333-3333-4333-8333-333333333333. Then reply with the single word DONE. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"7a2a86d0-80a3-4db5-822f-2d3fcbc16e11"}]}}
+{"type":"turn/start","data":{"turn":3}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":3,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Call list_agents once with scope set to descendants and observe the subagent you started. Then call interrupt_agent once with agent_id set to 33333333-3333-4333-8333-333333333333. Then reply with the single word DONE. Do not call any other tool."}],"source":{"kind":"user"},"role":"user","id":"7a2a86d0-80a3-4db5-822f-2d3fcbc16e11"},"surfaceOp":"append"}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_list","name":"list_agents","argumentsDelta":"{}"}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_list","name":"list_agents","arguments":"{}"}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":3,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_list","name":"list_agents","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"d3402e92-2f7e-4cd5-9537-ae9beedeecab"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[45,46,47,48,49],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":3,"step":1,"callId":"call_list","name":"list_agents","arguments":"{}"}}
+{"type":"tool/result","data":{"turn":3,"step":1,"message":{"source":{"kind":"tool","callId":"call_list"},"content":[{"type":"tool-result","toolCallId":"call_list","content":[{"type":"text","text":"33333333-3333-4333-8333-333333333333 [ready] — Reply with CHILD_OK"}],"isError":false}],"role":"user","id":"8ae233de-8fde-48d7-a9d0-0d9a480a00d0"}},"sourceEventSeqs":[51],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":3,"step":1}}
+{"type":"step/start","data":{"turn":3,"step":2}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":2}}}}
+{"type":"assistant/chunk","data":{"turn":3,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":3,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3ac0f29f-72ae-44fb-9414-974470095618"},"usage":{"inputTokens":10,"outputTokens":2}},"sourceEventSeqs":[55,56,57,58,59],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":3,"step":2}}
+{"type":"turn/end","data":{"turn":3,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-max-tokens-partial/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-max-tokens-partial/session.1.jsonl
index d1f5447275..4a1555c6b8 100644
--- a/examples/acp-agent/tests/snapshots/subagent-max-tokens-partial/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-max-tokens-partial/session.1.jsonl
@@ -1,31 +1,31 @@
 {"type":"session","version":0,"id":"22222222-2222-4222-8222-222222222222","createdAt":2,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786373921809,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":1,"time":1786373921809,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Write the words 'partial one', call todo_write once, then keep going until you are cut off."}],"source":{"kind":"user"},"role":"user","id":"dbf0670a-79cc-4e2c-a298-c4d804e6fe61"}]}}
-{"type":"turn/start","seq":2,"time":1786373921810,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786373921810,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":4,"time":1786373921831,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Truncated child"}}
-{"type":"step/start","seq":5,"time":1786373921836,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":1786348800142,"data":{"content":[{"type":"text","text":"Write the words 'partial one', call todo_write once, then keep going until you are cut off."}],"source":{"kind":"user"},"role":"user","id":"dbf0670a-79cc-4e2c-a298-c4d804e6fe61"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":1786373921837,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"885ea744-63dd-4198-95be-267b9db94a57"},"surfaceOp":"append"}
-{"type":"session/title","seq":8,"time":1786373921837,"data":{"title":"Write the words 'partial one',","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":9,"time":1786348800142,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":10,"time":1786348800142,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":12,"time":1786348800146,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"partial one"}}}}
-{"type":"assistant/chunk","seq":13,"time":1786348800146,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":14,"time":1786348800146,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_child_1","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"keep going\", \"status\": \"in_progress\"}]}"}}}}
-{"type":"assistant/chunk","seq":15,"time":1786348800146,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":9}}}}
-{"type":"assistant/chunk","seq":16,"time":1786348800146,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":17,"time":1786348800146,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"partial one"},{"type":"tool-call","id":"call_child_1","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"keep going\", \"status\": \"in_progress\"}]}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5e4d07b2-6ce2-4ab6-8be0-fbdf2d3af138"},"usage":{"inputTokens":20,"outputTokens":9}},"sourceEventSeqs":[11,12,13,14,15,16],"surfaceOp":"append"}
-{"type":"tool/call","seq":18,"time":1786348800146,"data":{"turn":1,"step":1,"callId":"call_child_1","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"keep going\", \"status\": \"in_progress\"}]}"}}
-{"type":"todo/write","seq":19,"time":1786348800150,"data":{"todos":[{"content":"keep going","status":"in_progress"}]}}
-{"type":"tool/result","seq":20,"time":1786348800151,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_child_1"},"content":[{"type":"tool-result","toolCallId":"call_child_1","content":[{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"67efbbf3-ca1e-4d23-8f19-940cb391ff1e"}},"sourceEventSeqs":[18],"surfaceOp":"append"}
-{"type":"step/end","seq":21,"time":1786348800151,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":22,"time":1786348800156,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":23,"time":1786348800160,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":24,"time":1786348800160,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_child_2","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"keep going\", \"status\": \"completed\"}]}"}}}}
-{"type":"assistant/chunk","seq":25,"time":1786348800160,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":30,"outputTokens":4}}}}
-{"type":"assistant/chunk","seq":26,"time":1786348800160,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"max-tokens"}}}}
-{"type":"assistant/message","seq":27,"time":1786348800160,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bb92e4ec-f260-4415-9782-b71147ea378d"},"usage":{"inputTokens":30,"outputTokens":4}},"sourceEventSeqs":[23,24,25,26],"surfaceOp":"append"}
-{"type":"step/end","seq":28,"time":1786348800160,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":29,"time":1786348800160,"data":{"turn":1,"reason":{"kind":"max-tokens"}}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Write the words 'partial one', call todo_write once, then keep going until you are cut off."}],"source":{"kind":"user"},"role":"user","id":"dbf0670a-79cc-4e2c-a298-c4d804e6fe61"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Truncated child"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Write the words 'partial one', call todo_write once, then keep going until you are cut off."}],"source":{"kind":"user"},"role":"user","id":"dbf0670a-79cc-4e2c-a298-c4d804e6fe61"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"885ea744-63dd-4198-95be-267b9db94a57"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Write the words 'partial one',","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"partial one"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_child_1","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"keep going\", \"status\": \"in_progress\"}]}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":9}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"partial one"},{"type":"tool-call","id":"call_child_1","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"keep going\", \"status\": \"in_progress\"}]}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5e4d07b2-6ce2-4ab6-8be0-fbdf2d3af138"},"usage":{"inputTokens":20,"outputTokens":9}},"sourceEventSeqs":[11,12,13,14,15,16],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_child_1","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"keep going\", \"status\": \"in_progress\"}]}"}}
+{"type":"todo/write","data":{"todos":[{"content":"keep going","status":"in_progress"}]}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_child_1"},"content":[{"type":"tool-result","toolCallId":"call_child_1","content":[{"type":"text","text":"Updated todo list: 0 pending, 1 in progress, 0 completed."}],"isError":false}],"role":"user","id":"67efbbf3-ca1e-4d23-8f19-940cb391ff1e"}},"sourceEventSeqs":[18],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_child_2","name":"todo_write","arguments":"{\"todos\": [{\"content\": \"keep going\", \"status\": \"completed\"}]}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":30,"outputTokens":4}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"max-tokens"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bb92e4ec-f260-4415-9782-b71147ea378d"},"usage":{"inputTokens":30,"outputTokens":4}},"sourceEventSeqs":[23,24,25,26],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-max-tokens-partial/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-max-tokens-partial/session.jsonl
index 3e513be7f2..982505feb3 100644
--- a/examples/acp-agent/tests/snapshots/subagent-max-tokens-partial/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-max-tokens-partial/session.jsonl
@@ -1,26 +1,26 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1,"cwd":"{{cwd}}","delegationDepth":0}
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-{"type":"turn/start","seq":1,"time":1786348800079,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1786348800079,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1786348800114,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1786348800114,"data":{"content":[{"type":"text","text":"Use the subagent tool exactly once to delegate this subtask: \"Write the words 'partial one', call todo_write once, then keep going until you are cut off.\" After the subagent returns, reply with the single word PARENT_DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"8787ce07-4f1f-4368-bf58-18e30484ed44"},"surfaceOp":"append"}
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-{"type":"session/title","seq":6,"time":1786348800114,"data":{"title":"Use the subagent tool exactly","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1786348800115,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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-{"type":"assistant/chunk","seq":12,"time":1786348800120,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":13,"time":1786348800120,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_parent_1","name":"subagent","arguments":"{\"description\": \"Truncated child\", \"prompt\": \"Write the words 'partial one', call todo_write once, then keep going until you are cut off.\", \"run_in_background\":false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f4269cd2-9132-4b68-8f9b-ff3a40321bc9"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12],"surfaceOp":"append"}
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-{"type":"turn/end","seq":24,"time":1786348800173,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool exactly once to delegate this subtask: \"Write the words 'partial one', call todo_write once, then keep going until you are cut off.\" After the subagent returns, reply with the single word PARENT_DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"8787ce07-4f1f-4368-bf58-18e30484ed44"}]}}
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+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Use the subagent tool exactly once to delegate this subtask: \"Write the words 'partial one', call todo_write once, then keep going until you are cut off.\" After the subagent returns, reply with the single word PARENT_DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"8787ce07-4f1f-4368-bf58-18e30484ed44"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"32a8b2ce-f1f9-411b-940d-c80f772561ac"},"surfaceOp":"append"}
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+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
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+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_parent_1","name":"subagent","arguments":"{\"description\": \"Truncated child\", \"prompt\": \"Write the words 'partial one', call todo_write once, then keep going until you are cut off.\", \"run_in_background\":false}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_parent_1","name":"subagent","arguments":"{\"description\": \"Truncated child\", \"prompt\": \"Write the words 'partial one', call todo_write once, then keep going until you are cut off.\", \"run_in_background\":false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f4269cd2-9132-4b68-8f9b-ff3a40321bc9"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12],"surfaceOp":"append"}
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+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_parent_1"},"content":[{"type":"tool-result","toolCallId":"call_parent_1","content":[{"type":"text","text":"Error: subagent run hit its token limit before finishing\nPartial output before the run ended:\npartial one"}],"isError":true}],"role":"user","id":"84e0d207-3fad-40bd-b68d-2dfefb0e181c"}},"sourceEventSeqs":[14],"surfaceOp":"append"}
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+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"PARENT_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":12,"outputTokens":2}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"fb14560d-1d98-4b18-8736-b079de400315"},"usage":{"inputTokens":12,"outputTokens":2}},"sourceEventSeqs":[18,19,20,21],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-mixed/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-mixed/session.1.jsonl
index fb16252271..0450b110d9 100644
--- a/examples/acp-agent/tests/snapshots/subagent-mixed/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-mixed/session.1.jsonl
@@ -1,23 +1,23 @@
 {"type":"session","version":0,"id":"e4aafa18-b9e3-48d0-8aae-6c9b25dcae80","createdAt":1783352145223,"cwd":"{{cwd}}","parentSession":"959ffdf5-03e2-465e-9482-009b704632dc","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786443013973,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":1,"time":1786443013973,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"73ce401a-faaf-408a-879e-7485380d537d"}]}}
-{"type":"turn/start","seq":2,"time":1786443013974,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786357524735,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":4,"time":1786443013990,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Reply ALPHA only"}}
-{"type":"step/start","seq":5,"time":1786443013993,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":1786443013993,"data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"73ce401a-faaf-408a-879e-7485380d537d"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":1786357524755,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"99a07901-52e6-4426-8c1d-b6953226a82e"},"surfaceOp":"append"}
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-{"type":"request/header","seq":9,"time":1786443013994,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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-{"type":"text-chunks","seq0":32,"time0":1783352146129,"data":{"turn":1,"step":1,"index":1,"dt":[0,0],"texts":["AL","P","HA"]}}
-{"type":"assistant/chunk","seq":35,"time":1783352146129,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user asked me to reply with exactly the word \"ALPHA\" and nothing else."}}}}
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-{"type":"assistant/message","seq":39,"time":1786443013999,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user asked me to reply with exactly the word \"ALPHA\" and nothing else."},{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cfff210d-8dd3-4acc-bbc3-fa860baf88cf"},"usage":{"inputTokens":48,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}},"sourceEventSeqs":[11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],"surfaceOp":"append"}
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-{"type":"turn/end","seq":41,"time":1786443013999,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
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+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Reply ALPHA only"}}
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+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"73ce401a-faaf-408a-879e-7485380d537d"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"99a07901-52e6-4426-8c1d-b6953226a82e"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":1,"index":0,"dt":[-2378304174,28,1,0,0,0,28,0,0,0,0,0,29,0,0,0,0,29],"texts":["The"," user"," asked"," me"," to"," reply"," with"," exactly"," the"," word"," \"","AL","P","HA","\""," and"," nothing"," else","."]}}
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+{"type":"text-chunks","data":{"turn":1,"step":1,"index":1,"dt":[0,0],"texts":["AL","P","HA"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user asked me to reply with exactly the word \"ALPHA\" and nothing else."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"ALPHA"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":48,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user asked me to reply with exactly the word \"ALPHA\" and nothing else."},{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cfff210d-8dd3-4acc-bbc3-fa860baf88cf"},"usage":{"inputTokens":48,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}},"sourceEventSeqs":[11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-mixed/session.2.jsonl b/examples/acp-agent/tests/snapshots/subagent-mixed/session.2.jsonl
index 8929bb14ac..e530bdc572 100644
--- a/examples/acp-agent/tests/snapshots/subagent-mixed/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-mixed/session.2.jsonl
@@ -1,42 +1,42 @@
 {"type":"session","version":0,"id":"02b3a8dd-1d5e-4866-825f-5fbf5000a632","createdAt":1783352147504,"cwd":"{{cwd}}","parentSession":"959ffdf5-03e2-465e-9482-009b704632dc","seedLength":36,"origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498797352,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Remember this fact for later: the project codeword is SAFFRON. Reply with the single word OK and stop. Do not use any tools."}],"source":{"kind":"user"},"role":"user","id":"3d1ea7cb-c273-4c38-a765-5ff256eaaf51"}]}}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-mixed/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-mixed/session.jsonl
index 9bc4a52d9c..4506fd2db8 100644
--- a/examples/acp-agent/tests/snapshots/subagent-mixed/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-mixed/session.jsonl
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+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The first subagent returned \"ALPHA\". Now I need to use the subagent_fork tool (forked child that inherits this conversation) to ask about the project codeword."},{"type":"tool-call","id":"call_00_JSr5rhREq23wSmwSkCP77184","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"7790a2a8-64b3-4d98-8d85-6b2667f3adbc"},"usage":{"inputTokens":54,"outputTokens":128,"cacheReadTokens":3072,"reasoningTokens":40}},"sourceEventSeqs":[121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":2,"step":2,"callId":"call_00_JSr5rhREq23wSmwSkCP77184","name":"subagent_fork","arguments":"{\"description\": \"Recall project codeword\", \"prompt\": \"What is the project codeword mentioned earlier in this conversation? Reply with exactly that one word and nothing else.\"}"}}
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+{"type":"step/end","data":{"turn":2,"step":2}}
+{"type":"step/start","data":{"turn":2,"step":3}}
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+{"type":"assistant/chunk","data":{"turn":2,"step":3,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"text-chunks","data":{"turn":2,"step":3,"index":1,"dt":[0,0,0],"texts":["PAR","ENT","_D","ONE"]}}
+{"type":"assistant/chunk","data":{"turn":2,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"Both subagents returned:\n1. First (fresh child): \"ALPHA\"\n2. Second (forked child): \"SAFFRON\" - correctly inherited the conversation context where I was asked to remember the codeword \"SAFFRON\".\n\nNow I reply with \"PARENT_DONE\" as instructed."}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":3,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"PARENT_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":69,"outputTokens":69,"cacheReadTokens":3200,"reasoningTokens":64}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Both subagents returned:\n1. First (fresh child): \"ALPHA\"\n2. Second (forked child): \"SAFFRON\" - correctly inherited the conversation context where I was asked to remember the codeword \"SAFFRON\".\n\nNow I reply with \"PARENT_DONE\" as instructed."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"256c985a-449a-4176-9233-7d29cf47ba5e"},"usage":{"inputTokens":69,"outputTokens":69,"cacheReadTokens":3200,"reasoningTokens":64}},"sourceEventSeqs":[217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290],"surfaceOp":"append"}
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+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-multi/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-multi/session.1.jsonl
index 0f484a685c..fefe54ddbb 100644
--- a/examples/acp-agent/tests/snapshots/subagent-multi/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-multi/session.1.jsonl
@@ -1,23 +1,23 @@
 {"type":"session","version":0,"id":"553f8e92-aac1-4df3-8657-eacbb58f9581","createdAt":1783352127669,"cwd":"{{cwd}}","parentSession":"14dda109-5728-45ba-a002-7db9543fe50e","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786357521737,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":1,"time":1786357521737,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"a287f842-f6f2-4a17-ab4c-820e41f498d5"}]}}
-{"type":"turn/start","seq":2,"time":1786357521737,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786357521737,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":4,"time":1786357521754,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Return ALPHA only"}}
-{"type":"step/start","seq":5,"time":1786357521756,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":1785730447828,"data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"a287f842-f6f2-4a17-ab4c-820e41f498d5"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":1786357521756,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"d02b7edd-f500-4049-92fe-8f957dba266d"},"surfaceOp":"append"}
-{"type":"session/title","seq":8,"time":1786357521756,"data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":9,"time":1785730447828,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":10,"time":1785730447828,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":11,"time":1783352128280,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"reasoning-chunks","seq0":12,"time0":1783352128280,"data":{"turn":1,"step":1,"index":0,"dt":[0,0,0,1,19,0,0,0,0,1,31,0,0,0,0,32,1,0],"texts":["The"," user"," wants"," me"," to"," reply"," with"," exactly"," the"," word"," \"","AL","P","HA","\""," and"," nothing"," else","."]}}
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-{"type":"text-chunks","seq0":32,"time0":1783352128365,"data":{"turn":1,"step":1,"index":1,"dt":[0,0],"texts":["AL","P","HA"]}}
-{"type":"assistant/chunk","seq":35,"time":1783352128365,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to reply with exactly the word \"ALPHA\" and nothing else."}}}}
-{"type":"assistant/chunk","seq":36,"time":1785498794825,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"ALPHA"}}}}
-{"type":"assistant/chunk","seq":37,"time":1785730447834,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":49,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}}}}
-{"type":"assistant/chunk","seq":38,"time":1785730447834,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":39,"time":1785730447834,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"ALPHA\" and nothing else."},{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5f1e6087-da72-4a56-9bc0-ae1ac6618a8a"},"usage":{"inputTokens":49,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}},"sourceEventSeqs":[11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],"surfaceOp":"append"}
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-{"type":"turn/end","seq":41,"time":1785730447834,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"a287f842-f6f2-4a17-ab4c-820e41f498d5"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Return ALPHA only"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"a287f842-f6f2-4a17-ab4c-820e41f498d5"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"d02b7edd-f500-4049-92fe-8f957dba266d"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":1,"index":0,"dt":[0,0,0,1,19,0,0,0,0,1,31,0,0,0,0,32,1,0],"texts":["The"," user"," wants"," me"," to"," reply"," with"," exactly"," the"," word"," \"","AL","P","HA","\""," and"," nothing"," else","."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"text-chunks","data":{"turn":1,"step":1,"index":1,"dt":[0,0],"texts":["AL","P","HA"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to reply with exactly the word \"ALPHA\" and nothing else."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"ALPHA"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":49,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly the word \"ALPHA\" and nothing else."},{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"5f1e6087-da72-4a56-9bc0-ae1ac6618a8a"},"usage":{"inputTokens":49,"outputTokens":23,"cacheReadTokens":2816,"reasoningTokens":19}},"sourceEventSeqs":[11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-multi/session.2.jsonl b/examples/acp-agent/tests/snapshots/subagent-multi/session.2.jsonl
index 69257c9318..3408f6c152 100644
--- a/examples/acp-agent/tests/snapshots/subagent-multi/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-multi/session.2.jsonl
@@ -1,24 +1,24 @@
 {"type":"session","version":0,"id":"5f49e80c-16fc-42c7-a617-0b6bd0680aa3","createdAt":1783352129662,"cwd":"{{cwd}}","parentSession":"14dda109-5728-45ba-a002-7db9543fe50e","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786357521782,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":1,"time":1786357521783,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word BETA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"53f6419d-8ddc-4eee-8803-5b68411336f9"}]}}
-{"type":"turn/start","seq":2,"time":1786357521783,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786357521783,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":4,"time":1786357521799,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Return BETA only"}}
-{"type":"step/start","seq":5,"time":1786357521801,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":1785730447881,"data":{"content":[{"type":"text","text":"Reply with exactly the word BETA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"53f6419d-8ddc-4eee-8803-5b68411336f9"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":1786357521802,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"6d044342-0258-40c0-8948-20e5ef9617f3"},"surfaceOp":"append"}
-{"type":"session/title","seq":8,"time":1786357521802,"data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":9,"time":1785730447881,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":10,"time":1785730447881,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-multi/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-multi/session.jsonl
index 857a5c35f2..8094ed3c5c 100644
--- a/examples/acp-agent/tests/snapshots/subagent-multi/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-multi/session.jsonl
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+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"50a1100d-448e-41f2-8f99-39be199db492"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Use the subagent tool TWICE,","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
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+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"tool-call-chunks","data":{"turn":1,"step":1,"index":1,"dt":[0,0,27,0,1,28,1,0,0,29,26,1,0,0,0,28,1,0,0,29,0,1,0,0,0,31,0,0,1,0,27,60,0],"id":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","name":"subagent","args":["","{","\"","description","\"",": ","\"","Return"," AL","P","HA"," only","\"",", ","\"","prom","pt","\"",": ","\"","Reply"," with"," exactly"," the"," word"," AL","P","HA"," and"," nothing"," else",".","\"",", \"run_in_background\": false}"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to use the subagent tool twice, sequentially (one at a time). First subagent should reply with \"ALPHA\", second with \"BETA\". After both return, I reply with \"PARENT_DONE\"."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","name":"subagent","arguments":"{\"description\": \"Return ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\": false}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":2938,"outputTokens":124,"cacheReadTokens":0,"reasoningTokens":49}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to use the subagent tool twice, sequentially (one at a time). First subagent should reply with \"ALPHA\", second with \"BETA\". After both return, I reply with \"PARENT_DONE\"."},{"type":"tool-call","id":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","name":"subagent","arguments":"{\"description\": \"Return ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\": false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a026258f-9f25-471c-a66a-93b0364e7c15"},"usage":{"inputTokens":2938,"outputTokens":124,"cacheReadTokens":0,"reasoningTokens":49}},"sourceEventSeqs":[9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","name":"subagent","arguments":"{\"description\": \"Return ALPHA only\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\": false}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_00_7zDCCjdsQgrk5LR2bAEQ1010"},"content":[{"type":"tool-result","toolCallId":"call_00_7zDCCjdsQgrk5LR2bAEQ1010","content":[{"type":"text","text":"ALPHA"}],"isError":false}],"role":"user","id":"b1554403-438f-4b23-87db-d4cd8d0b9fa6"}},"sourceEventSeqs":[99],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":2,"index":0,"dt":[1,0,29,0,0,1,0,0,27,30,0,0,0,0,1,27,1,0,0,0,88,0],"texts":["First"," sub","agent"," returned"," \"","AL","P","HA","\"."," Now"," I","'ll"," call"," the"," second"," sub","agent"," to"," return"," \"","B","ETA","\"."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"tool-call-chunks","data":{"turn":1,"step":2,"index":1,"dt":[0,0,0,28,0,0,0,29,0,28,0,0,0,30,1,0,0,27,0,0,0,0,0,31,0,0,0,0,29,57,1],"id":"call_00_FudNKuJ0fchSptGy3Scw1411","name":"subagent","args":["","{","\"","description","\"",": ","\"","Return"," B","ETA"," only","\"",", ","\"","prom","pt","\"",": ","\"","Reply"," with"," exactly"," the"," word"," B","ETA"," and"," nothing"," else",".","\"",", \"run_in_background\": false}"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"First subagent returned \"ALPHA\". Now I'll call the second subagent to return \"BETA\"."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_FudNKuJ0fchSptGy3Scw1411","name":"subagent","arguments":"{\"description\": \"Return BETA only\", \"prompt\": \"Reply with exactly the word BETA and nothing else.\", \"run_in_background\": false}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":133,"outputTokens":96,"cacheReadTokens":2944,"reasoningTokens":23}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"First subagent returned \"ALPHA\". Now I'll call the second subagent to return \"BETA\"."},{"type":"tool-call","id":"call_00_FudNKuJ0fchSptGy3Scw1411","name":"subagent","arguments":"{\"description\": \"Return BETA only\", \"prompt\": \"Reply with exactly the word BETA and nothing else.\", \"run_in_background\": false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6271fc4f-19d3-41fe-9500-8f15c823e262"},"usage":{"inputTokens":133,"outputTokens":96,"cacheReadTokens":2944,"reasoningTokens":23}},"sourceEventSeqs":[103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":2,"callId":"call_00_FudNKuJ0fchSptGy3Scw1411","name":"subagent","arguments":"{\"description\": \"Return BETA only\", \"prompt\": \"Reply with exactly the word BETA and nothing else.\", \"run_in_background\": false}"}}
+{"type":"tool/result","data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"call_00_FudNKuJ0fchSptGy3Scw1411"},"content":[{"type":"tool-result","toolCallId":"call_00_FudNKuJ0fchSptGy3Scw1411","content":[{"type":"text","text":"BETA"}],"isError":false}],"role":"user","id":"92fc990e-874a-4927-a918-7244bf2d4ff4"}},"sourceEventSeqs":[165],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"step/start","data":{"turn":1,"step":3}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":3,"index":0,"dt":[0,0,0,23,1,31,0,1,0,0,0,28,1,0,0,0,0,27,0,1,0,0,27,0,0,1,0,27,1],"texts":["Both"," sub","agents"," have"," returned",":"," first"," with"," \"","AL","P","HA","\","," second"," with"," \"","B","ETA","\"."," Now"," I"," should"," reply"," with"," \"","PAR","ENT","_D","ONE","\"."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":1,"blockType":"text"}}}
+{"type":"text-chunks","data":{"turn":1,"step":3,"index":1,"dt":[0,0,0],"texts":["PAR","ENT","_D","ONE"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"Both subagents have returned: first with \"ALPHA\", second with \"BETA\". Now I should reply with \"PARENT_DONE\"."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"PARENT_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":115,"outputTokens":35,"cacheReadTokens":3072,"reasoningTokens":30}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"reasoning","text":"Both subagents have returned: first with \"ALPHA\", second with \"BETA\". Now I should reply with \"PARENT_DONE\"."},{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b51ff9b8-1c06-485e-8e42-5eac7675c590"},"usage":{"inputTokens":115,"outputTokens":35,"cacheReadTokens":3072,"reasoningTokens":30}},"sourceEventSeqs":[169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":3}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-parallel/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-parallel/session.1.jsonl
index 98797db8fb..91939aac30 100644
--- a/examples/acp-agent/tests/snapshots/subagent-parallel/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-parallel/session.1.jsonl
@@ -1,18 +1,18 @@
 {"type":"session","version":0,"id":"bbbbbbbb-0000-4000-8000-000000000002","createdAt":1783352127000,"cwd":"{{cwd}}","parentSession":"aaaaaaaa-0000-4000-8000-000000000001","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786373947132,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":1,"time":1786373947134,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2f521e1b-2d0b-48ba-ba1d-407f291ee45a"}]}}
-{"type":"turn/start","seq":2,"time":1786373947134,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786373947134,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":4,"time":1786373947165,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Say the word ALPHA"}}
-{"type":"step/start","seq":5,"time":1786373947168,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":1786338530759,"data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2f521e1b-2d0b-48ba-ba1d-407f291ee45a"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":1786373947168,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"a60e9d06-cba1-41ba-a45f-f22db38d8320"},"surfaceOp":"append"}
-{"type":"session/title","seq":8,"time":1786373947168,"data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":9,"time":1786338530759,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":10,"time":1786338530759,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":11,"time":1786338530769,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":12,"time":1786338530769,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"ALPHA"}}}}
-{"type":"assistant/chunk","seq":13,"time":1786338530769,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":14,"time":1786338530769,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"33360f22-af93-47ab-b024-047eec09b0af"}},"sourceEventSeqs":[11,12,13],"surfaceOp":"append"}
-{"type":"step/end","seq":15,"time":1786338530769,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":16,"time":1786338530769,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2f521e1b-2d0b-48ba-ba1d-407f291ee45a"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Say the word ALPHA"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"2f521e1b-2d0b-48ba-ba1d-407f291ee45a"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"a60e9d06-cba1-41ba-a45f-f22db38d8320"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"ALPHA"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"33360f22-af93-47ab-b024-047eec09b0af"}},"sourceEventSeqs":[11,12,13],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-parallel/session.2.jsonl b/examples/acp-agent/tests/snapshots/subagent-parallel/session.2.jsonl
index 22ca3687ba..6421838907 100644
--- a/examples/acp-agent/tests/snapshots/subagent-parallel/session.2.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-parallel/session.2.jsonl
@@ -1,18 +1,18 @@
 {"type":"session","version":0,"id":"cccccccc-0000-4000-8000-000000000003","createdAt":1783352127001,"cwd":"{{cwd}}","parentSession":"aaaaaaaa-0000-4000-8000-000000000001","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786373947132,"data":{"policy":"never","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":1,"time":1786373947133,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"d2b36d19-0f3b-472f-b19b-558890c7351f"}]}}
-{"type":"turn/start","seq":2,"time":1786373947133,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":1786373947134,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":4,"time":1786373947170,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Say the word ALPHA"}}
-{"type":"step/start","seq":5,"time":1786373947173,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":1786338530749,"data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"d2b36d19-0f3b-472f-b19b-558890c7351f"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":1786373947174,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"1aff74f1-d0b0-4681-9132-91d79d3209dd"},"surfaceOp":"append"}
-{"type":"session/title","seq":8,"time":1786373947174,"data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":9,"time":1786338530749,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":10,"time":1786338530749,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":11,"time":1786338530759,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":12,"time":1786338530759,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"ALPHA"}}}}
-{"type":"assistant/chunk","seq":13,"time":1786338530759,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":14,"time":1786338530759,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f1a03494-a119-4b31-9922-d36983f76adf"}},"sourceEventSeqs":[11,12,13],"surfaceOp":"append"}
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-{"type":"turn/end","seq":16,"time":1786338530760,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"d2b36d19-0f3b-472f-b19b-558890c7351f"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Say the word ALPHA"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly the word ALPHA and nothing else."}],"source":{"kind":"user"},"role":"user","id":"d2b36d19-0f3b-472f-b19b-558890c7351f"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"1aff74f1-d0b0-4681-9132-91d79d3209dd"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly the word","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"ALPHA"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"ALPHA"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f1a03494-a119-4b31-9922-d36983f76adf"}},"sourceEventSeqs":[11,12,13],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-parallel/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-parallel/session.jsonl
index acc6188615..deccd0a8ec 100644
--- a/examples/acp-agent/tests/snapshots/subagent-parallel/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-parallel/session.jsonl
@@ -1,28 +1,28 @@
 {"type":"session","version":0,"id":"aaaaaaaa-0000-4000-8000-000000000001","createdAt":1783352126000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1786338530687,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool TWICE in the SAME assistant message (two parallel tool calls in one response), each delegating the identical subtask: 'Reply with exactly the word ALPHA and nothing else.' Give both calls the description 'Say the word ALPHA'. After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"02062dd0-83d4-4b40-ab23-2fbcb0a8be96"}]}}
-{"type":"turn/start","seq":1,"time":1786338530688,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1786338530688,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1786338530716,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1786338530716,"data":{"content":[{"type":"text","text":"Use the subagent tool TWICE in the SAME assistant message (two parallel tool calls in one response), each delegating the identical subtask: 'Reply with exactly the word ALPHA and nothing else.' Give both calls the description 'Say the word ALPHA'. After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"02062dd0-83d4-4b40-ab23-2fbcb0a8be96"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1786338530716,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"2dd192ab-72ed-4c20-a487-40aa14bd5c07"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1786338530716,"data":{"title":"Use the subagent tool TWICE","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1786338530717,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":1786338530717,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":1786338530722,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":10,"time":1786338530722,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_parallel_alpha_1","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"}}}}
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-{"type":"assistant/chunk","seq":13,"time":1786338530722,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1786338530723,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_parallel_alpha_1","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"},{"type":"tool-call","id":"call_parallel_alpha_2","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6ff33634-55af-4c37-a491-dd5b8673923f"}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
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-{"type":"tool/result","seq":17,"time":1786338530770,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_parallel_alpha_1"},"content":[{"type":"tool-result","toolCallId":"call_parallel_alpha_1","content":[{"type":"text","text":"ALPHA"}],"isError":false}],"role":"user","id":"caa3552f-81bf-415c-852f-1c88ca1b29b3"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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-{"type":"step/start","seq":20,"time":1786338530778,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":21,"time":1786338530782,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":22,"time":1786338530782,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"PARENT_DONE"}}}}
-{"type":"assistant/chunk","seq":23,"time":1786338530782,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":24,"time":1786338530782,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"84586dd8-4985-4286-ab4b-fa9965803fb8"}},"sourceEventSeqs":[21,22,23],"surfaceOp":"append"}
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-{"type":"turn/end","seq":26,"time":1786338530782,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the subagent tool TWICE in the SAME assistant message (two parallel tool calls in one response), each delegating the identical subtask: 'Reply with exactly the word ALPHA and nothing else.' Give both calls the description 'Say the word ALPHA'. After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"02062dd0-83d4-4b40-ab23-2fbcb0a8be96"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Use the subagent tool TWICE in the SAME assistant message (two parallel tool calls in one response), each delegating the identical subtask: 'Reply with exactly the word ALPHA and nothing else.' Give both calls the description 'Say the word ALPHA'. After both subagents return, reply with the single word PARENT_DONE and stop. Do not use the bash tool."}],"source":{"kind":"user"},"role":"user","id":"02062dd0-83d4-4b40-ab23-2fbcb0a8be96"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"2dd192ab-72ed-4c20-a487-40aa14bd5c07"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Use the subagent tool TWICE","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_parallel_alpha_1","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_parallel_alpha_2","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_parallel_alpha_1","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"},{"type":"tool-call","id":"call_parallel_alpha_2","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6ff33634-55af-4c37-a491-dd5b8673923f"}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_parallel_alpha_1","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"}}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_parallel_alpha_2","name":"subagent","arguments":"{\"description\": \"Say the word ALPHA\", \"prompt\": \"Reply with exactly the word ALPHA and nothing else.\", \"run_in_background\":false}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_parallel_alpha_1"},"content":[{"type":"tool-result","toolCallId":"call_parallel_alpha_1","content":[{"type":"text","text":"ALPHA"}],"isError":false}],"role":"user","id":"caa3552f-81bf-415c-852f-1c88ca1b29b3"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_parallel_alpha_2"},"content":[{"type":"tool-result","toolCallId":"call_parallel_alpha_2","content":[{"type":"text","text":"ALPHA"}],"isError":false}],"role":"user","id":"ef6b5f6f-94bb-4719-a914-87bc0366660a"}},"sourceEventSeqs":[16],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"PARENT_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"84586dd8-4985-4286-ab4b-fa9965803fb8"}},"sourceEventSeqs":[21,22,23],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.1.jsonl
index 7b3de21ff1..796b6bc0d9 100644
--- a/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.1.jsonl
@@ -1,2 +1,2 @@
 {"type":"session","version":0,"id":"eb69342c-62b6-4320-a78b-961745f89333","createdAt":1786358409171,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"approval/policy","seq":0,"time":1786443070419,"data":{"policy":"never","source":"delegation"}}
+{"type":"approval/policy","data":{"policy":"never","source":"delegation"}}
diff --git a/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.jsonl
index 243346b68e..fdca1c64b7 100644
--- a/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-published-run-failure/session.jsonl
@@ -1,28 +1,28 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785730452478,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate one foreground subagent. Its published run will fail; report that failure as PARENT_OBSERVED_ERROR."}],"source":{"kind":"user"},"role":"user","id":"07e6bcfc-3d70-46ef-8bdd-17a45c2c346e"}]}}
-{"type":"turn/start","seq":1,"time":1785821410243,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821410244,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1785730452505,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785730452505,"data":{"content":[{"type":"text","text":"Delegate one foreground subagent. Its published run will fail; report that failure as PARENT_OBSERVED_ERROR."}],"source":{"kind":"user"},"role":"user","id":"07e6bcfc-3d70-46ef-8bdd-17a45c2c346e"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730452505,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"902b2d5b-6b6a-471a-b765-5a5ca5d0ff53"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1785730452505,"data":{"title":"Delegate one foreground subagent. Its","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1785730452506,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":1785730452506,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":10,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_published_failure","name":"subagent","argumentsDelta":"{\"description\":\"Fail published run\",\"prompt\":\"This child prompt must never run.\",\"run_in_background\":false}"}}}
-{"type":"assistant/chunk","seq":11,"time":1785537317619,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_published_failure","name":"subagent","arguments":"{\"description\":\"Fail published run\",\"prompt\":\"This child prompt must never run.\",\"run_in_background\":false}"}}}}
-{"type":"assistant/chunk","seq":12,"time":1785537317619,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":13,"time":1785730452515,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":1785730452515,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_published_failure","name":"subagent","arguments":"{\"description\":\"Fail published run\",\"prompt\":\"This child prompt must never run.\",\"run_in_background\":false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bcc7161a-d563-47ed-a854-1ccf563992cb"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
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-{"type":"tool/result","seq":16,"time":1785730452525,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_published_failure"},"content":[{"type":"tool-result","toolCallId":"call_published_failure","content":[{"type":"text","text":"Error: subagent run failed: Error: snapshot published run failed; dispose failed: Error: snapshot published handle disposal failed"}],"isError":true}],"role":"user","id":"280647fb-2acf-45e4-9b20-cbdad027fbfa"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-report/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-report/session.1.jsonl
index b83358f93d..8a7efa70b8 100644
--- a/examples/acp-agent/tests/snapshots/subagent-report/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-report/session.1.jsonl
@@ -1,31 +1,31 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1789000001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
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-{"type":"approval/policy","seq":2,"time":1786374158805,"data":{"policy":"never","source":"delegation"}}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-report/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-report/session.jsonl
index f8b5deef29..090047f313 100644
--- a/examples/acp-agent/tests/snapshots/subagent-report/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-report/session.jsonl
@@ -1,57 +1,57 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1789000000000,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-spawn-in-process/session.1.jsonl b/examples/acp-agent/tests/snapshots/subagent-spawn-in-process/session.1.jsonl
index 5eb0455932..76acd8e095 100644
--- a/examples/acp-agent/tests/snapshots/subagent-spawn-in-process/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-spawn-in-process/session.1.jsonl
@@ -1,23 +1,23 @@
 {"type":"session","version":0,"id":"ea339828-7885-42e1-9083-4355e6f1708d","createdAt":1783352120855,"cwd":"{{cwd}}","parentSession":"5138ed0d-e86e-4a7d-b75b-803307e92b17","origin":"subagent","delegationDepth":1}
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diff --git a/examples/acp-agent/tests/snapshots/subagent-spawn-in-process/session.jsonl b/examples/acp-agent/tests/snapshots/subagent-spawn-in-process/session.jsonl
index 29f9aae9cd..9b68de4813 100644
--- a/examples/acp-agent/tests/snapshots/subagent-spawn-in-process/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/subagent-spawn-in-process/session.jsonl
@@ -1,34 +1,34 @@
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diff --git a/examples/acp-agent/tests/snapshots/text-turn/session.jsonl b/examples/acp-agent/tests/snapshots/text-turn/session.jsonl
index 5016b38b30..4b8a04fc0a 100644
--- a/examples/acp-agent/tests/snapshots/text-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/text-turn/session.jsonl
@@ -1,22 +1,22 @@
 {"type":"session","version":0,"id":"539aa64c-7f37-40ff-abd8-ed45b717be1b","createdAt":1783600629539,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/todo-write/session.jsonl b/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
index 08b553c6ec..e51d936a8b 100644
--- a/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
@@ -1,37 +1,37 @@
 {"type":"session","version":0,"id":"d9d967e8-0112-471c-a3b5-dfdc171aba61","createdAt":1785987077399,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/tool-call-turn/session.jsonl b/examples/acp-agent/tests/snapshots/tool-call-turn/session.jsonl
index c5f2f28f4d..5cef6c40c2 100644
--- a/examples/acp-agent/tests/snapshots/tool-call-turn/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/tool-call-turn/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/web-fetch/session.jsonl b/examples/acp-agent/tests/snapshots/web-fetch/session.jsonl
index 87c02446d6..65327ebc49 100644
--- a/examples/acp-agent/tests/snapshots/web-fetch/session.jsonl
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diff --git a/examples/acp-agent/tests/snapshots/workflow-run/session.1.jsonl b/examples/acp-agent/tests/snapshots/workflow-run/session.1.jsonl
index 080198e7bc..c7291a6e30 100644
--- a/examples/acp-agent/tests/snapshots/workflow-run/session.1.jsonl
+++ b/examples/acp-agent/tests/snapshots/workflow-run/session.1.jsonl
@@ -1,23 +1,23 @@
 {"type":"session","version":0,"id":"583a4db2-3350-436c-b4a5-5615fd159052","createdAt":1783600636316,"cwd":"{{cwd}}","parentSession":"3fd7d599-56b1-493a-930d-f1fc5e1556e8","origin":"subagent","delegationDepth":1}
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diff --git a/examples/acp-agent/tests/snapshots/workflow-run/session.jsonl b/examples/acp-agent/tests/snapshots/workflow-run/session.jsonl
index 75efc1a3e0..ac0dac637e 100644
--- a/examples/acp-agent/tests/snapshots/workflow-run/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/workflow-run/session.jsonl
@@ -1,38 +1,38 @@
 {"type":"session","version":0,"id":"3fd7d599-56b1-493a-930d-f1fc5e1556e8","createdAt":1783600631835,"cwd":"{{cwd}}","delegationDepth":0}
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diff --git a/examples/acp-agent/tests/snapshots/workspace-edit/session.jsonl b/examples/acp-agent/tests/snapshots/workspace-edit/session.jsonl
index 09f05a0659..f2e19f7c74 100644
--- a/examples/acp-agent/tests/snapshots/workspace-edit/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/workspace-edit/session.jsonl
@@ -1,61 +1,61 @@
 {"type":"session","version":0,"id":"48aca674-000a-4583-810b-01f8785cef13","createdAt":1783352264076,"cwd":"{{cwd}}","delegationDepth":0}
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+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":219,"outputTokens":25,"cacheReadTokens":3072,"reasoningTokens":22}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The file now has two lines:\n1. hello\n2. WORLD\n\nI can reply with DONE."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"0c8f9ddb-8946-494f-9249-9633e56482dd"},"usage":{"inputTokens":219,"outputTokens":25,"cacheReadTokens":3072,"reasoningTokens":22}},"sourceEventSeqs":[212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":4}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/headless.snapshot.ts b/examples/headless-agent/tests/headless.snapshot.ts
index 19247c3c6b..d68c8f18da 100644
--- a/examples/headless-agent/tests/headless.snapshot.ts
+++ b/examples/headless-agent/tests/headless.snapshot.ts
@@ -5,10 +5,12 @@ import { delimiter, dirname, join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import {
   normalizeSessionLog,
+  normalizeSessionSnapshot,
   normalizeStdout,
   refreshFixtureReplacements,
   scrubRequestHeaders,
   stabilizeRefreshLog,
+  projectSessionSnapshot,
   tokenizeSessionFixtureCwd,
   type HarvestedLog,
   type NormalizeContext,
@@ -241,7 +243,7 @@ describe('headless stream-json snapshots', () => {
         const actual = logs[0]
         if (actual === undefined) throw new Error('the headless profile did not persist its session')
         const context = contextFromLogs([actual.content])
-        const session = scrubRequestHeaders(normalizeSessionLog(actual.content, context))
+        const session = normalizeSessionSnapshot(actual.content, context)
         if (refreshing) await writeFile(headlessSessionExpected, session)
         expect(session).toBe(await readFile(headlessSessionExpected, 'utf8'))
         expect(session).toContain(task)
@@ -383,9 +385,9 @@ describe('headless stream-json snapshots', () => {
             content: actual.content,
           }
           const replacements = refreshFixtureReplacements([harvested], [expectedSession])
-          expectedSession = tokenizeSessionFixtureCwd(
+          expectedSession = projectSessionSnapshot(tokenizeSessionFixtureCwd(
             stabilizeRefreshLog(actual.content, expectedSession, replacements, actualContext),
-          )
+          ))
           await writeFile(compactionSessionFixture, expectedSession)
         }
         const expectedContext = contextFromLogs([expectedSession])
@@ -623,9 +625,9 @@ describe('headless stream-json snapshots', () => {
             if (existing === undefined || file === undefined) {
               throw new Error(`headless snapshot has no fixture for persisted log ${index}`)
             }
-            const stable = tokenizeSessionFixtureCwd(
+            const stable = projectSessionSnapshot(tokenizeSessionFixtureCwd(
               stabilizeRefreshLog(actual.content, existing, replacements, actualContext),
-            )
+            ))
             await writeFile(file, stable)
             return stable
           }))
@@ -912,7 +914,7 @@ describe('headless stream-json snapshots', () => {
         expect(JSON.stringify(notices[0])).toContain('CHILD_RESULT')
 
         const context = contextFromLogs([parent.content, child.content])
-        const normalizedChild = scrubRequestHeaders(normalizeSessionLog(child.content, context))
+        const normalizedChild = normalizeSessionSnapshot(child.content, context)
         if (refreshing) await writeFile(childExpected, normalizedChild)
         expect(normalizedChild).toBe(await readFile(childExpected, 'utf8'))
         expect(normalizedChild).toContain('CHILD_RESULT')
@@ -966,9 +968,9 @@ describe('headless stream-json snapshots', () => {
             content: actual.content,
           }
           const replacements = refreshFixtureReplacements([harvested], [expectedSession])
-          expectedSession = tokenizeSessionFixtureCwd(
+          expectedSession = projectSessionSnapshot(tokenizeSessionFixtureCwd(
             stabilizeRefreshLog(actual.content, expectedSession, replacements, actualContext),
-          )
+          ))
           await writeFile(ptySessionFixture, expectedSession)
         }
         const expectedContext = contextFromLogs([expectedSession])
diff --git a/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl b/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl
index 7af81fa449..e3196fe731 100644
--- a/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl
+++ b/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl
@@ -1,25 +1,25 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":0,"data":{"turn":1}}
-{"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Perform one side-effecting remote mutation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"step/start","seq":2,"time":0,"data":{"turn":1,"step":1}}
-{"type":"assistant/message","seq":3,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"unknown-outcome-call","name":"write_remote","arguments":"{\"value\":1}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"surfaceOp":"append"}
-{"type":"tool/call","seq":4,"time":0,"data":{"turn":1,"step":1,"callId":"unknown-outcome-call","name":"write_remote","arguments":"{\"value\":1}"}}
-{"type":"tool/result","seq":5,"time":0,"data":{"turn":1,"step":1,"message":{"id":"interrupted-tool-result-unknown-outcome-call-5","role":"user","source":{"kind":"tool","callId":"unknown-outcome-call"},"content":[{"type":"tool-result","toolCallId":"unknown-outcome-call","isError":true,"content":[{"type":"text","text":"The tool call was interrupted after it was recorded, but no result was durably recorded. Its outcome is unknown. Decide whether to retry from the tool semantics: retry only if the operation is read-only or idempotent; if it may have side effects, first verify external state or ask the user. Do not retry blindly."}]}]},"error":{"name":"ToolOutcomeUnknownError","code":"TOOL_OUTCOME_UNKNOWN"}},"surfaceOp":"append","sourceEventSeqs":[4]}
-{"type":"step/end","seq":6,"time":0,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":7,"time":0,"data":{"turn":1,"reason":{"kind":"interrupted"}}}
-{"type":"session/end-seed","seq":8,"time":0,"data":{}}
-{"type":"agent/inbox/spliced","seq":9,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":10,"time":0,"data":{"turn":2}}
-{"type":"agent/inbox/spliced","seq":11,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":12,"time":0,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":13,"time":0,"data":{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":14,"time":0,"data":{"title":"Perform one side-effecting remote mutati","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":15,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":16,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}
-{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}}
-{"type":"assistant/chunk","seq":20,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":21,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"sourceEventSeqs":[17,18,19,20],"surfaceOp":"append"}
-{"type":"step/end","seq":22,"time":0,"data":{"turn":2,"step":1}}
-{"type":"turn/end","seq":23,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Perform one side-effecting remote mutation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"unknown-outcome-call","name":"write_remote","arguments":"{\"value\":1}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"unknown-outcome-call","name":"write_remote","arguments":"{\"value\":1}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"id":"interrupted-tool-result-unknown-outcome-call-5","role":"user","source":{"kind":"tool","callId":"unknown-outcome-call"},"content":[{"type":"tool-result","toolCallId":"unknown-outcome-call","isError":true,"content":[{"type":"text","text":"The tool call was interrupted after it was recorded, but no result was durably recorded. Its outcome is unknown. Decide whether to retry from the tool semantics: retry only if the operation is read-only or idempotent; if it may have side effects, first verify external state or ask the user. Do not retry blindly."}]}]},"error":{"name":"ToolOutcomeUnknownError","code":"TOOL_OUTCOME_UNKNOWN"}},"surfaceOp":"append","sourceEventSeqs":[4]}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"interrupted"}}}
+{"type":"session/end-seed","data":{}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Perform one side-effecting remote mutati","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"sourceEventSeqs":[17,18,19,20],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts b/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts
index 4fa0271fb0..618e6cc038 100644
--- a/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts
+++ b/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts
@@ -2,7 +2,7 @@ import { readFile, writeFile } from 'node:fs/promises'
 import { dirname, join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import { Context } from '@deepseek-ai/cordis'
-import { normalizeSessionLog, scrubRequestHeaders, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
+import { normalizeSessionSnapshot, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
 import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-loader-smoke'
 import { createUserMessage, CallId , createMessage } from '@deepseek-ai/dsh-llm'
 import SessionStore, { SESSION_FORMAT_VERSION, SessionId, type SessionEvent, type SessionHeader } from '@deepseek-ai/dsh-session'
@@ -101,7 +101,7 @@ describe('semantic checkpoint recovery snapshot', () => {
       },
       inspect: async () => {
         const normalization: NormalizeContext = { sessionIds: [sessionId], cwd }
-        const session = scrubRequestHeaders(normalizeSessionLog(await readFile(sessionPath, 'utf8'), normalization))
+        const session = normalizeSessionSnapshot(await readFile(sessionPath, 'utf8'), normalization)
         if (refreshing) await writeFile(sessionExpected, session)
         expect(session).toBe(await readFile(sessionExpected, 'utf8'))
         expect(session).toContain('TOOL_OUTCOME_UNKNOWN')
diff --git a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
index 8fb937dee2..1287de6339 100644
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
@@ -1,19 +1,19 @@
 {"type":"session","version":0,"id":"22222222-2222-4222-8222-222222222222","createdAt":1783950001000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498583877,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c66e310e-2597-4d01-85c8-2d70a9d831c0"}]}}
-{"type":"turn/start","seq":1,"time":1785821454445,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821454445,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":3,"time":1785821454466,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
-{"type":"step/start","seq":4,"time":1785730501506,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730501506,"data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c66e310e-2597-4d01-85c8-2d70a9d831c0"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1786373992181,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"fd0a0587-8df4-46b2-809a-317346a4c0f4"},"surfaceOp":"append"}
-{"type":"session/title","seq":7,"time":1786373992181,"data":{"title":"Reply with exactly DIRECT_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":8,"time":1785498583897,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\n# Dynamic Cordis Plugins\n\nDynamic Cordis plugins temporarily extend the current DSH process. A Plugin uses apply(ctx) to consume Services, listen to Events, provide Services, register model Tools, or register browser UI in Slots.\n\n- Plugin and Package definitions exist only in the current process. define itself does not modify repository source, configuration, or disk, and definitions do not survive a process restart.\n- The restricted execution environment prevents accidental misuse; it is not a security boundary for malicious code. Services obtained by dynamic code connect to the real runtime.\n\n## Make the user-facing plan clear first\n\n- Dynamic Cordis Plugins are one available implementation mechanism, not the default for every request. Consider whether one could help only when the user intends to design or create something, or when a temporary interface could materially aid the current work. The presence of these instructions or Tools, and discussion of Cordis itself, do not make a request a dynamic-Plugin task.\n- When Cordis is a plausible fit, infer the intended work target and lifetime from the request and conversation. Use it only when the outcome belongs to the current running harness and should be delivered as a temporary runtime extension. If that distinction is materially ambiguous, ask at most one concise question about the intended result or lifetime. Otherwise proceed with the matching workflow; do not require the user to know or choose Cordis as an implementation mechanism.\n- Once a dynamic Plugin is appropriate, decide whether the task creates a new Plugin or modifies the Plugin named by the user with @pluginId. Proceed directly when the goal is clear; do not ask for repeated confirmation.\n- Choose Host, Client, or both from the requested outcome. Do not propose a Client/browser UI when the task does not need visible page behavior, and do not avoid Client when the requested outcome is visual, interactive, or depends on page state. Host versus Client is an implementation choice; do not make the user choose it.\n- When a design direction or a potentially useful interface would materially affect the result, ask at most one concise outcome or creative-preference question and offer a few candidate directions. Otherwise proceed directly; do not conduct a multi-round interview or a complex questionnaire.\n- cordis_define only defines and presents code; it does not run it. After definition, explain the pluginId and packageId returned by the Host and whether the next step is a run or update.\n- cordis_run may require user approval. When it returns awaiting-approval, explain that the user must allow or reject it in the UI. Do not wait, retry, or claim that it is running.\n- When it returns starting, explain that the request has entered the asynchronous flow and the Client is still activating. starting does not mean success. Wait for the system to report the final result through steering context.\n- Do not request approval again after the user rejects it. After a technical failure, fix the same Plugin from its diagnostics; do not silently create a replacement Plugin.\n\n## Recommended workflow and Tools\n\nBefore creating, modifying, or repairing a Plugin, load the cordis-plugin-development Skill. The Skill provides requirement navigation, capability composition, complete examples, and troubleshooting. Treat Inspect Provider results as the source of truth for exact APIs.\n\n1. cordis_inspect_list: discover the current Host and Client Providers and their read-only query methods.\n2. cordis_inspect_query: use the returned platform, provider, method, and schema to query exact Service, Event, Builtin, Slot, Theme token, or Tool information.\n3. cordis_inspect_self: inspect the current Session's Plugins, Packages, version pointers, source, and diagnostics. Source is returned only when both pluginId and packageId are specified.\n4. cordis_define: create the first Package for a new Plugin or append an immutable Package to an existing Plugin. It defines code but does not run it.\n5. cordis_run: activate an exact Package. Use run for the first activation, restarting current, or rollback; use update to switch versions.\n6. cordis_stop: remove the current Run and pending approval request while retaining definitions, grants, and version pointers.\n7. cordis_undefine: permanently stop and delete a Plugin and all of its Packages. Use it only after confirming that the user no longer needs them.\n\n- Inspect and Catalog data only confirm capabilities, names, signatures, types, and registration protocols before code is written; they do not replace business APIs.\n- Query Service.listService and Event.listEvents without input to choose from their compact signature directories, then query the exact service or event before using it. Exact queries return the structured contract and only its referenced types.\n- At runtime, a Plugin must call real Services or listen to real Events. Do not cache, display, or depend on Inspect results as business data.\n\n## Identity, versions, and approval\n\n- pluginId identifies a Plugin that can be modified over time. For a new Plugin, submit only a semantic idPrefix of 3–6 lowercase English letters; the Host allocates the final ID.\n- packageId identifies one immutable Host/Client source version under a Plugin. To change code, define a new Package; never overwrite an old version.\n- pluginRunId identifies one activation attempt and connects its approval, Host/Client loading, private RPC, Run card, and errors.\n- currentPackageId is the most recent fully successful Package. Stopping, starting an update, or failing an update does not clear it.\n- nextPackageId is the target awaiting approval, being attempted, awaiting Client activation, or most recently failed.\n- A single check mark authorizes only the current Package; double check marks authorize future versions of the same Plugin. A grant remains in effect after a technical failure.\n- An update stops the old Run before starting the target Package. Failure does not automatically restart the old version; retry next with update or roll back to current with run.\n\nWhen the user enters @pluginId, the system injects identity, the default base Package, version pointers, and runtime status, but not source code:\n\n1. Call cordis_inspect_self(pluginId, packageId) to read the target source.\n2. Use cordis_define in existing mode to append a Package to the same Plugin.\n3. Call cordis_run in run or update mode according to the version relationship.\n\nNever silently create another Plugin for @pluginId. If the reference is unavailable because it was removed, belongs to another Session, or was lost on process restart, tell the user directly.\n\n## High-frequency errors that must be avoided\n\n### Services: ctx.get and inject\n\n- Read an optional Service with ctx.get('serviceName') by default and handle undefined.\n- Declare inject: ['serviceName'] on the returned Plugin object only when the Service is a hard dependency and the Plugin must enter waiting until Cordis reactivates it after the Service appears.\n- Read ctx.serviceName only after declaring that Service in inject. Never access an undeclared Service as a ctx property.\n\n```js\nreturn {\n  inject: ['requiredService'],\n  apply(ctx) {\n    ctx.requiredService.someMethod()\n    const optionalService = ctx.get('optionalService')\n    if (optionalService !== undefined) optionalService.someMethod()\n  },\n}\n```\n\n### Code: use plain JavaScript only\n\n- Host and Client code is not transformed by TypeScript, JSX, or a bundler.\n- Do not use TypeScript types, as, decorators, import, require, or JSX.\n- Client React code must use React.createElement(...); never write <Component />.\n- Do not assume that process, Buffer, window, document, fetch, native timers, or any other global is available. Query the corresponding platform's Builtins and Services first.\n\n### Data: do not serialize live data\n\n- Services, Events, Slots, Sessions, and their derived Cordis/DSH objects are internal live data, not ordinary JSON that can be dumped.\n- Do not apply JSON.stringify, structuredClone, recursive enumeration, full copying, or whole-object display to live data.\n- Read only the leaf fields required by the task, then construct the smallest owned data object without Host references.\n\n### Lifecycle: every side effect must be reversible\n\n- Services, Events, Tools, handlers, timers, Slots, styles, and theme overrides must all belong to the current Fiber.\n- Use ctx.effect(), ctx.on(), or official APIs that return a disposer so stop, update, or undefine removes every side effect.\n- The cordis-plugin-development Skill contains complete timer, Waterfall, Slot, theme, Tool, RPC, and React examples and troubleshooting guidance.\n\n## Host and Client\n\n- Host runs in the DSH Node.js process and is appropriate for files, networking, commands, Agent/Session access, Host Events, Services, model Tools, and JSON methods callable by the Client.\n- Client runs in the browser page and is appropriate for themes, layout, current page state, Tool cards, and Slot UI.\n- Host and Client communicate through Package-private JSON methods: Host uses harness.handle(method, handler), and Client uses host.call(method, args). The direction is Client→Host, and only lossless JSON may cross it.\n- Client UI must be registered in a queried Slot; apply() cannot directly return a React Element. Query Slots.listSubTree without root to choose from the compact purpose/topology tree, then query the exact root for its full registration contract and props before writing code.\n- See the Skill and Inspect Providers for Run-specific panels and exact Slot registration patterns.\n\n## Asynchronous results and recovery\n\n- Do not wait inside a Tool for approval or browser work that can happen only after the current turn ends.\n- Asynchronous success, rejection, and runtime errors update Run state and notify you through steering context.\n- After a technical failure, use cordis_inspect_self to read the exact Package source and its message/stack. Define a corrected Package under the same Plugin and retry autonomously.\n- Use the cordis-plugin-development Skill for other failure causes, repair procedures, and complete extension patterns.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.\n\n## Writing code for run_code\n\n`run_code` takes two required arguments: `code` — the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped) — and `description`, a short summary of what the program does. Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs. */\n  cordis_define: {\n    plugin: {\n      kind: \"new\";\n      /** Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix. */\n      idPrefix: string;\n    } | {\n      kind: \"existing\";\n      /** Exact ID of an existing Plugin; the new Package is appended to that instance. */\n      pluginId: string;\n    };\n    /** Short, readable Package name. */\n    name: string;\n    /** One-sentence, user-facing description of the Package purpose. */\n    purpose: string;\n    code: {\n      /** Plain JavaScript function body that returns the Host-half Cordis Plugin. */\n      host?: string;\n      /** Plain JavaScript function body that returns the browser Client-half Cordis Plugin. */\n      client?: string;\n    };\n  } & Record<string, JsonValue>;\n  /** List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call. */\n  cordis_inspect_list: Record<string, JsonValue>;\n  /** Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props. */\n  cordis_inspect_query: {\n    /** Runtime platform that owns the Provider. */\n    platform: \"host\" | \"client\";\n    /** Exact Provider ID returned by cordis_inspect_list. */\n    provider: string;\n    /** Exact method name declared by the Provider manifest. */\n    method: string;\n    /** Optional query input; it must satisfy the method input schema. */\n    input?: JsonValue;\n  } & Record<string, JsonValue>;\n  /** Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers. */\n  cordis_inspect_self: {\n    /** Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin. */\n    pluginId?: string;\n    /** Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned. */\n    packageId?: string;\n  } & Record<string, JsonValue>;\n  /** Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it. */\n  cordis_run: {\n    /** Stable Plugin ID returned by cordis_define. */\n    pluginId: string;\n    /** Exact immutable Package ID to activate under that Plugin. */\n    packageId: string;\n    /** Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package. */\n    mode: \"run\" | \"update\";\n  } & Record<string, JsonValue>;\n  /** Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal. */\n  cordis_stop: {\n    /** Stable dynamic Plugin ID to stop. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead. */\n  cordis_undefine: {\n    /** Stable dynamic Plugin ID to remove permanently. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op. */\n  interrupt_agent: {\n    /** The agent id of the running agent to interrupt. */\n    agent_id: string;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops. */\n  job_kill: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the job. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background jobs (running and finished) with their ids, kinds, and statuses. */\n  job_list: Record<string, JsonValue>;\n  /** Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap. */\n  job_output: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n  } & Record<string, JsonValue>;\n  /** Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn. The workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result. Script-body hooks: - `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly. - `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages. - `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_define: {\n    pluginId: string;\n    packageId: string;\n    name: string;\n    purpose: string;\n    hasHostHalf: boolean;\n    hasClientHalf: boolean;\n  };\n  cordis_inspect_list: JsonValue;\n  cordis_inspect_query: JsonValue;\n  cordis_inspect_self: JsonValue;\n  cordis_run: JsonValue;\n  cordis_stop: {\n    pluginId: string;\n  };\n  cordis_undefine: {\n    pluginId: string;\n    wasRunning: boolean;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  interrupt_agent: {\n    accepted: boolean;\n  };\n  job_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  job_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  job_output: {\n    text: string;\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"cordis_define","description":"Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs.","parameters":{"type":"object","properties":{"plugin":{"oneOf":[{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"new"},"idPrefix":{"type":"string","description":"Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix."}},"required":["kind","idPrefix"]},{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"existing"},"pluginId":{"type":"string","description":"Exact ID of an existing Plugin; the new Package is appended to that instance."}},"required":["kind","pluginId"]}]},"name":{"type":"string","description":"Short, readable Package name."},"purpose":{"type":"string","description":"One-sentence, user-facing description of the Package purpose."},"code":{"type":"object","additionalProperties":false,"properties":{"host":{"type":"string","description":"Plain JavaScript function body that returns the Host-half Cordis Plugin."},"client":{"type":"string","description":"Plain JavaScript function body that returns the browser Client-half Cordis Plugin."}}}},"required":["plugin","name","purpose","code"]}},{"name":"cordis_inspect_list","description":"List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call.","parameters":{"type":"object","properties":{}}},{"name":"cordis_inspect_query","description":"Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props.","parameters":{"type":"object","properties":{"platform":{"type":"string","description":"Runtime platform that owns the Provider.","enum":["host","client"]},"provider":{"type":"string","description":"Exact Provider ID returned by cordis_inspect_list."},"method":{"type":"string","description":"Exact method name declared by the Provider manifest."},"input":{"description":"Optional query input; it must satisfy the method input schema."}},"required":["platform","provider","method"]}},{"name":"cordis_inspect_self","description":"Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin."},"packageId":{"type":"string","description":"Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned."}}}},{"name":"cordis_run","description":"Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define."},"packageId":{"type":"string","description":"Exact immutable Package ID to activate under that Plugin."},"mode":{"type":"string","description":"Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package.","enum":["run","update"]}},"required":["pluginId","packageId","mode"]}},{"name":"cordis_stop","description":"Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to stop."}},"required":["pluginId"]}},{"name":"cordis_undefine","description":"Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to remove permanently."}},"required":["pluginId"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"run_code","description":"Execute a TypeScript program against the available tools. Takes two required arguments: `code`, the BODY of an async function (erasable syntax only; top-level `await` and `return` work), and `description`, a short summary of what the program does. Call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
-{"type":"request/context","seq":9,"time":1785730501507,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":10,"time":1783957884564,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":11,"time":1783957884564,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"DIRECT_CHILD_OK"}}}
-{"type":"assistant/chunk","seq":12,"time":1783957884564,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DIRECT_CHILD_OK"}}}}
-{"type":"assistant/chunk","seq":13,"time":1785498583897,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":14,"time":1785730501507,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":15,"time":1785730501507,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"02dd8a61-a39a-46d0-8f6f-457533271cae"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
-{"type":"step/end","seq":16,"time":1785730501507,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":17,"time":1785730501507,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c66e310e-2597-4d01-85c8-2d70a9d831c0"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"c66e310e-2597-4d01-85c8-2d70a9d831c0"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"fd0a0587-8df4-46b2-809a-317346a4c0f4"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly DIRECT_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\n# Dynamic Cordis Plugins\n\nDynamic Cordis plugins temporarily extend the current DSH process. A Plugin uses apply(ctx) to consume Services, listen to Events, provide Services, register model Tools, or register browser UI in Slots.\n\n- Plugin and Package definitions exist only in the current process. define itself does not modify repository source, configuration, or disk, and definitions do not survive a process restart.\n- The restricted execution environment prevents accidental misuse; it is not a security boundary for malicious code. Services obtained by dynamic code connect to the real runtime.\n\n## Make the user-facing plan clear first\n\n- Dynamic Cordis Plugins are one available implementation mechanism, not the default for every request. Consider whether one could help only when the user intends to design or create something, or when a temporary interface could materially aid the current work. The presence of these instructions or Tools, and discussion of Cordis itself, do not make a request a dynamic-Plugin task.\n- When Cordis is a plausible fit, infer the intended work target and lifetime from the request and conversation. Use it only when the outcome belongs to the current running harness and should be delivered as a temporary runtime extension. If that distinction is materially ambiguous, ask at most one concise question about the intended result or lifetime. Otherwise proceed with the matching workflow; do not require the user to know or choose Cordis as an implementation mechanism.\n- Once a dynamic Plugin is appropriate, decide whether the task creates a new Plugin or modifies the Plugin named by the user with @pluginId. Proceed directly when the goal is clear; do not ask for repeated confirmation.\n- Choose Host, Client, or both from the requested outcome. Do not propose a Client/browser UI when the task does not need visible page behavior, and do not avoid Client when the requested outcome is visual, interactive, or depends on page state. Host versus Client is an implementation choice; do not make the user choose it.\n- When a design direction or a potentially useful interface would materially affect the result, ask at most one concise outcome or creative-preference question and offer a few candidate directions. Otherwise proceed directly; do not conduct a multi-round interview or a complex questionnaire.\n- cordis_define only defines and presents code; it does not run it. After definition, explain the pluginId and packageId returned by the Host and whether the next step is a run or update.\n- cordis_run may require user approval. When it returns awaiting-approval, explain that the user must allow or reject it in the UI. Do not wait, retry, or claim that it is running.\n- When it returns starting, explain that the request has entered the asynchronous flow and the Client is still activating. starting does not mean success. Wait for the system to report the final result through steering context.\n- Do not request approval again after the user rejects it. After a technical failure, fix the same Plugin from its diagnostics; do not silently create a replacement Plugin.\n\n## Recommended workflow and Tools\n\nBefore creating, modifying, or repairing a Plugin, load the cordis-plugin-development Skill. The Skill provides requirement navigation, capability composition, complete examples, and troubleshooting. Treat Inspect Provider results as the source of truth for exact APIs.\n\n1. cordis_inspect_list: discover the current Host and Client Providers and their read-only query methods.\n2. cordis_inspect_query: use the returned platform, provider, method, and schema to query exact Service, Event, Builtin, Slot, Theme token, or Tool information.\n3. cordis_inspect_self: inspect the current Session's Plugins, Packages, version pointers, source, and diagnostics. Source is returned only when both pluginId and packageId are specified.\n4. cordis_define: create the first Package for a new Plugin or append an immutable Package to an existing Plugin. It defines code but does not run it.\n5. cordis_run: activate an exact Package. Use run for the first activation, restarting current, or rollback; use update to switch versions.\n6. cordis_stop: remove the current Run and pending approval request while retaining definitions, grants, and version pointers.\n7. cordis_undefine: permanently stop and delete a Plugin and all of its Packages. Use it only after confirming that the user no longer needs them.\n\n- Inspect and Catalog data only confirm capabilities, names, signatures, types, and registration protocols before code is written; they do not replace business APIs.\n- Query Service.listService and Event.listEvents without input to choose from their compact signature directories, then query the exact service or event before using it. Exact queries return the structured contract and only its referenced types.\n- At runtime, a Plugin must call real Services or listen to real Events. Do not cache, display, or depend on Inspect results as business data.\n\n## Identity, versions, and approval\n\n- pluginId identifies a Plugin that can be modified over time. For a new Plugin, submit only a semantic idPrefix of 3–6 lowercase English letters; the Host allocates the final ID.\n- packageId identifies one immutable Host/Client source version under a Plugin. To change code, define a new Package; never overwrite an old version.\n- pluginRunId identifies one activation attempt and connects its approval, Host/Client loading, private RPC, Run card, and errors.\n- currentPackageId is the most recent fully successful Package. Stopping, starting an update, or failing an update does not clear it.\n- nextPackageId is the target awaiting approval, being attempted, awaiting Client activation, or most recently failed.\n- A single check mark authorizes only the current Package; double check marks authorize future versions of the same Plugin. A grant remains in effect after a technical failure.\n- An update stops the old Run before starting the target Package. Failure does not automatically restart the old version; retry next with update or roll back to current with run.\n\nWhen the user enters @pluginId, the system injects identity, the default base Package, version pointers, and runtime status, but not source code:\n\n1. Call cordis_inspect_self(pluginId, packageId) to read the target source.\n2. Use cordis_define in existing mode to append a Package to the same Plugin.\n3. Call cordis_run in run or update mode according to the version relationship.\n\nNever silently create another Plugin for @pluginId. If the reference is unavailable because it was removed, belongs to another Session, or was lost on process restart, tell the user directly.\n\n## High-frequency errors that must be avoided\n\n### Services: ctx.get and inject\n\n- Read an optional Service with ctx.get('serviceName') by default and handle undefined.\n- Declare inject: ['serviceName'] on the returned Plugin object only when the Service is a hard dependency and the Plugin must enter waiting until Cordis reactivates it after the Service appears.\n- Read ctx.serviceName only after declaring that Service in inject. Never access an undeclared Service as a ctx property.\n\n```js\nreturn {\n  inject: ['requiredService'],\n  apply(ctx) {\n    ctx.requiredService.someMethod()\n    const optionalService = ctx.get('optionalService')\n    if (optionalService !== undefined) optionalService.someMethod()\n  },\n}\n```\n\n### Code: use plain JavaScript only\n\n- Host and Client code is not transformed by TypeScript, JSX, or a bundler.\n- Do not use TypeScript types, as, decorators, import, require, or JSX.\n- Client React code must use React.createElement(...); never write <Component />.\n- Do not assume that process, Buffer, window, document, fetch, native timers, or any other global is available. Query the corresponding platform's Builtins and Services first.\n\n### Data: do not serialize live data\n\n- Services, Events, Slots, Sessions, and their derived Cordis/DSH objects are internal live data, not ordinary JSON that can be dumped.\n- Do not apply JSON.stringify, structuredClone, recursive enumeration, full copying, or whole-object display to live data.\n- Read only the leaf fields required by the task, then construct the smallest owned data object without Host references.\n\n### Lifecycle: every side effect must be reversible\n\n- Services, Events, Tools, handlers, timers, Slots, styles, and theme overrides must all belong to the current Fiber.\n- Use ctx.effect(), ctx.on(), or official APIs that return a disposer so stop, update, or undefine removes every side effect.\n- The cordis-plugin-development Skill contains complete timer, Waterfall, Slot, theme, Tool, RPC, and React examples and troubleshooting guidance.\n\n## Host and Client\n\n- Host runs in the DSH Node.js process and is appropriate for files, networking, commands, Agent/Session access, Host Events, Services, model Tools, and JSON methods callable by the Client.\n- Client runs in the browser page and is appropriate for themes, layout, current page state, Tool cards, and Slot UI.\n- Host and Client communicate through Package-private JSON methods: Host uses harness.handle(method, handler), and Client uses host.call(method, args). The direction is Client→Host, and only lossless JSON may cross it.\n- Client UI must be registered in a queried Slot; apply() cannot directly return a React Element. Query Slots.listSubTree without root to choose from the compact purpose/topology tree, then query the exact root for its full registration contract and props before writing code.\n- See the Skill and Inspect Providers for Run-specific panels and exact Slot registration patterns.\n\n## Asynchronous results and recovery\n\n- Do not wait inside a Tool for approval or browser work that can happen only after the current turn ends.\n- Asynchronous success, rejection, and runtime errors update Run state and notify you through steering context.\n- After a technical failure, use cordis_inspect_self to read the exact Package source and its message/stack. Define a corrected Package under the same Plugin and retry autonomously.\n- Use the cordis-plugin-development Skill for other failure causes, repair procedures, and complete extension patterns.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.\n\n## Writing code for run_code\n\n`run_code` takes two required arguments: `code` — the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped) — and `description`, a short summary of what the program does. Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs. */\n  cordis_define: {\n    plugin: {\n      kind: \"new\";\n      /** Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix. */\n      idPrefix: string;\n    } | {\n      kind: \"existing\";\n      /** Exact ID of an existing Plugin; the new Package is appended to that instance. */\n      pluginId: string;\n    };\n    /** Short, readable Package name. */\n    name: string;\n    /** One-sentence, user-facing description of the Package purpose. */\n    purpose: string;\n    code: {\n      /** Plain JavaScript function body that returns the Host-half Cordis Plugin. */\n      host?: string;\n      /** Plain JavaScript function body that returns the browser Client-half Cordis Plugin. */\n      client?: string;\n    };\n  } & Record<string, JsonValue>;\n  /** List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call. */\n  cordis_inspect_list: Record<string, JsonValue>;\n  /** Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props. */\n  cordis_inspect_query: {\n    /** Runtime platform that owns the Provider. */\n    platform: \"host\" | \"client\";\n    /** Exact Provider ID returned by cordis_inspect_list. */\n    provider: string;\n    /** Exact method name declared by the Provider manifest. */\n    method: string;\n    /** Optional query input; it must satisfy the method input schema. */\n    input?: JsonValue;\n  } & Record<string, JsonValue>;\n  /** Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers. */\n  cordis_inspect_self: {\n    /** Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin. */\n    pluginId?: string;\n    /** Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned. */\n    packageId?: string;\n  } & Record<string, JsonValue>;\n  /** Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it. */\n  cordis_run: {\n    /** Stable Plugin ID returned by cordis_define. */\n    pluginId: string;\n    /** Exact immutable Package ID to activate under that Plugin. */\n    packageId: string;\n    /** Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package. */\n    mode: \"run\" | \"update\";\n  } & Record<string, JsonValue>;\n  /** Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal. */\n  cordis_stop: {\n    /** Stable dynamic Plugin ID to stop. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead. */\n  cordis_undefine: {\n    /** Stable dynamic Plugin ID to remove permanently. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op. */\n  interrupt_agent: {\n    /** The agent id of the running agent to interrupt. */\n    agent_id: string;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops. */\n  job_kill: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the job. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background jobs (running and finished) with their ids, kinds, and statuses. */\n  job_list: Record<string, JsonValue>;\n  /** Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap. */\n  job_output: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n  } & Record<string, JsonValue>;\n  /** Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn. The workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result. Script-body hooks: - `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly. - `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages. - `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_define: {\n    pluginId: string;\n    packageId: string;\n    name: string;\n    purpose: string;\n    hasHostHalf: boolean;\n    hasClientHalf: boolean;\n  };\n  cordis_inspect_list: JsonValue;\n  cordis_inspect_query: JsonValue;\n  cordis_inspect_self: JsonValue;\n  cordis_run: JsonValue;\n  cordis_stop: {\n    pluginId: string;\n  };\n  cordis_undefine: {\n    pluginId: string;\n    wasRunning: boolean;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  interrupt_agent: {\n    accepted: boolean;\n  };\n  job_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  job_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  job_output: {\n    text: string;\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"cordis_define","description":"Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs.","parameters":{"type":"object","properties":{"plugin":{"oneOf":[{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"new"},"idPrefix":{"type":"string","description":"Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix."}},"required":["kind","idPrefix"]},{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"existing"},"pluginId":{"type":"string","description":"Exact ID of an existing Plugin; the new Package is appended to that instance."}},"required":["kind","pluginId"]}]},"name":{"type":"string","description":"Short, readable Package name."},"purpose":{"type":"string","description":"One-sentence, user-facing description of the Package purpose."},"code":{"type":"object","additionalProperties":false,"properties":{"host":{"type":"string","description":"Plain JavaScript function body that returns the Host-half Cordis Plugin."},"client":{"type":"string","description":"Plain JavaScript function body that returns the browser Client-half Cordis Plugin."}}}},"required":["plugin","name","purpose","code"]}},{"name":"cordis_inspect_list","description":"List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call.","parameters":{"type":"object","properties":{}}},{"name":"cordis_inspect_query","description":"Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props.","parameters":{"type":"object","properties":{"platform":{"type":"string","description":"Runtime platform that owns the Provider.","enum":["host","client"]},"provider":{"type":"string","description":"Exact Provider ID returned by cordis_inspect_list."},"method":{"type":"string","description":"Exact method name declared by the Provider manifest."},"input":{"description":"Optional query input; it must satisfy the method input schema."}},"required":["platform","provider","method"]}},{"name":"cordis_inspect_self","description":"Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin."},"packageId":{"type":"string","description":"Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned."}}}},{"name":"cordis_run","description":"Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define."},"packageId":{"type":"string","description":"Exact immutable Package ID to activate under that Plugin."},"mode":{"type":"string","description":"Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package.","enum":["run","update"]}},"required":["pluginId","packageId","mode"]}},{"name":"cordis_stop","description":"Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to stop."}},"required":["pluginId"]}},{"name":"cordis_undefine","description":"Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to remove permanently."}},"required":["pluginId"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"run_code","description":"Execute a TypeScript program against the available tools. Takes two required arguments: `code`, the BODY of an async function (erasable syntax only; top-level `await` and `return` work), and `description`, a short summary of what the program does. Call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"DIRECT_CHILD_OK"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DIRECT_CHILD_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"02dd8a61-a39a-46d0-8f6f-457533271cae"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
index e05489ba1f..1f18e866a9 100644
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
@@ -1,19 +1,19 @@
 {"type":"session","version":0,"id":"33333333-3333-4333-8333-333333333333","createdAt":1783950002000,"cwd":"{{cwd}}","parentSession":"11111111-1111-4111-8111-111111111111","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498584048,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"8b3cd23c-82f1-4903-8a3f-b9082059b40c"}]}}
-{"type":"turn/start","seq":1,"time":1785821454599,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821454599,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":3,"time":1785821454618,"data":{"version":2,"mode":"one-shot","provider":"spawn"}}
-{"type":"step/start","seq":4,"time":1785730501645,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":1785730501645,"data":{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"8b3cd23c-82f1-4903-8a3f-b9082059b40c"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":1786373992411,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"823e5037-9e96-4ef5-8c5b-cbe73b993ee2"},"surfaceOp":"append"}
-{"type":"session/title","seq":7,"time":1786373992411,"data":{"title":"Reply with exactly WORKFLOW_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":8,"time":1785498584067,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\n# Dynamic Cordis Plugins\n\nDynamic Cordis plugins temporarily extend the current DSH process. A Plugin uses apply(ctx) to consume Services, listen to Events, provide Services, register model Tools, or register browser UI in Slots.\n\n- Plugin and Package definitions exist only in the current process. define itself does not modify repository source, configuration, or disk, and definitions do not survive a process restart.\n- The restricted execution environment prevents accidental misuse; it is not a security boundary for malicious code. Services obtained by dynamic code connect to the real runtime.\n\n## Make the user-facing plan clear first\n\n- Dynamic Cordis Plugins are one available implementation mechanism, not the default for every request. Consider whether one could help only when the user intends to design or create something, or when a temporary interface could materially aid the current work. The presence of these instructions or Tools, and discussion of Cordis itself, do not make a request a dynamic-Plugin task.\n- When Cordis is a plausible fit, infer the intended work target and lifetime from the request and conversation. Use it only when the outcome belongs to the current running harness and should be delivered as a temporary runtime extension. If that distinction is materially ambiguous, ask at most one concise question about the intended result or lifetime. Otherwise proceed with the matching workflow; do not require the user to know or choose Cordis as an implementation mechanism.\n- Once a dynamic Plugin is appropriate, decide whether the task creates a new Plugin or modifies the Plugin named by the user with @pluginId. Proceed directly when the goal is clear; do not ask for repeated confirmation.\n- Choose Host, Client, or both from the requested outcome. Do not propose a Client/browser UI when the task does not need visible page behavior, and do not avoid Client when the requested outcome is visual, interactive, or depends on page state. Host versus Client is an implementation choice; do not make the user choose it.\n- When a design direction or a potentially useful interface would materially affect the result, ask at most one concise outcome or creative-preference question and offer a few candidate directions. Otherwise proceed directly; do not conduct a multi-round interview or a complex questionnaire.\n- cordis_define only defines and presents code; it does not run it. After definition, explain the pluginId and packageId returned by the Host and whether the next step is a run or update.\n- cordis_run may require user approval. When it returns awaiting-approval, explain that the user must allow or reject it in the UI. Do not wait, retry, or claim that it is running.\n- When it returns starting, explain that the request has entered the asynchronous flow and the Client is still activating. starting does not mean success. Wait for the system to report the final result through steering context.\n- Do not request approval again after the user rejects it. After a technical failure, fix the same Plugin from its diagnostics; do not silently create a replacement Plugin.\n\n## Recommended workflow and Tools\n\nBefore creating, modifying, or repairing a Plugin, load the cordis-plugin-development Skill. The Skill provides requirement navigation, capability composition, complete examples, and troubleshooting. Treat Inspect Provider results as the source of truth for exact APIs.\n\n1. cordis_inspect_list: discover the current Host and Client Providers and their read-only query methods.\n2. cordis_inspect_query: use the returned platform, provider, method, and schema to query exact Service, Event, Builtin, Slot, Theme token, or Tool information.\n3. cordis_inspect_self: inspect the current Session's Plugins, Packages, version pointers, source, and diagnostics. Source is returned only when both pluginId and packageId are specified.\n4. cordis_define: create the first Package for a new Plugin or append an immutable Package to an existing Plugin. It defines code but does not run it.\n5. cordis_run: activate an exact Package. Use run for the first activation, restarting current, or rollback; use update to switch versions.\n6. cordis_stop: remove the current Run and pending approval request while retaining definitions, grants, and version pointers.\n7. cordis_undefine: permanently stop and delete a Plugin and all of its Packages. Use it only after confirming that the user no longer needs them.\n\n- Inspect and Catalog data only confirm capabilities, names, signatures, types, and registration protocols before code is written; they do not replace business APIs.\n- Query Service.listService and Event.listEvents without input to choose from their compact signature directories, then query the exact service or event before using it. Exact queries return the structured contract and only its referenced types.\n- At runtime, a Plugin must call real Services or listen to real Events. Do not cache, display, or depend on Inspect results as business data.\n\n## Identity, versions, and approval\n\n- pluginId identifies a Plugin that can be modified over time. For a new Plugin, submit only a semantic idPrefix of 3–6 lowercase English letters; the Host allocates the final ID.\n- packageId identifies one immutable Host/Client source version under a Plugin. To change code, define a new Package; never overwrite an old version.\n- pluginRunId identifies one activation attempt and connects its approval, Host/Client loading, private RPC, Run card, and errors.\n- currentPackageId is the most recent fully successful Package. Stopping, starting an update, or failing an update does not clear it.\n- nextPackageId is the target awaiting approval, being attempted, awaiting Client activation, or most recently failed.\n- A single check mark authorizes only the current Package; double check marks authorize future versions of the same Plugin. A grant remains in effect after a technical failure.\n- An update stops the old Run before starting the target Package. Failure does not automatically restart the old version; retry next with update or roll back to current with run.\n\nWhen the user enters @pluginId, the system injects identity, the default base Package, version pointers, and runtime status, but not source code:\n\n1. Call cordis_inspect_self(pluginId, packageId) to read the target source.\n2. Use cordis_define in existing mode to append a Package to the same Plugin.\n3. Call cordis_run in run or update mode according to the version relationship.\n\nNever silently create another Plugin for @pluginId. If the reference is unavailable because it was removed, belongs to another Session, or was lost on process restart, tell the user directly.\n\n## High-frequency errors that must be avoided\n\n### Services: ctx.get and inject\n\n- Read an optional Service with ctx.get('serviceName') by default and handle undefined.\n- Declare inject: ['serviceName'] on the returned Plugin object only when the Service is a hard dependency and the Plugin must enter waiting until Cordis reactivates it after the Service appears.\n- Read ctx.serviceName only after declaring that Service in inject. Never access an undeclared Service as a ctx property.\n\n```js\nreturn {\n  inject: ['requiredService'],\n  apply(ctx) {\n    ctx.requiredService.someMethod()\n    const optionalService = ctx.get('optionalService')\n    if (optionalService !== undefined) optionalService.someMethod()\n  },\n}\n```\n\n### Code: use plain JavaScript only\n\n- Host and Client code is not transformed by TypeScript, JSX, or a bundler.\n- Do not use TypeScript types, as, decorators, import, require, or JSX.\n- Client React code must use React.createElement(...); never write <Component />.\n- Do not assume that process, Buffer, window, document, fetch, native timers, or any other global is available. Query the corresponding platform's Builtins and Services first.\n\n### Data: do not serialize live data\n\n- Services, Events, Slots, Sessions, and their derived Cordis/DSH objects are internal live data, not ordinary JSON that can be dumped.\n- Do not apply JSON.stringify, structuredClone, recursive enumeration, full copying, or whole-object display to live data.\n- Read only the leaf fields required by the task, then construct the smallest owned data object without Host references.\n\n### Lifecycle: every side effect must be reversible\n\n- Services, Events, Tools, handlers, timers, Slots, styles, and theme overrides must all belong to the current Fiber.\n- Use ctx.effect(), ctx.on(), or official APIs that return a disposer so stop, update, or undefine removes every side effect.\n- The cordis-plugin-development Skill contains complete timer, Waterfall, Slot, theme, Tool, RPC, and React examples and troubleshooting guidance.\n\n## Host and Client\n\n- Host runs in the DSH Node.js process and is appropriate for files, networking, commands, Agent/Session access, Host Events, Services, model Tools, and JSON methods callable by the Client.\n- Client runs in the browser page and is appropriate for themes, layout, current page state, Tool cards, and Slot UI.\n- Host and Client communicate through Package-private JSON methods: Host uses harness.handle(method, handler), and Client uses host.call(method, args). The direction is Client→Host, and only lossless JSON may cross it.\n- Client UI must be registered in a queried Slot; apply() cannot directly return a React Element. Query Slots.listSubTree without root to choose from the compact purpose/topology tree, then query the exact root for its full registration contract and props before writing code.\n- See the Skill and Inspect Providers for Run-specific panels and exact Slot registration patterns.\n\n## Asynchronous results and recovery\n\n- Do not wait inside a Tool for approval or browser work that can happen only after the current turn ends.\n- Asynchronous success, rejection, and runtime errors update Run state and notify you through steering context.\n- After a technical failure, use cordis_inspect_self to read the exact Package source and its message/stack. Define a corrected Package under the same Plugin and retry autonomously.\n- Use the cordis-plugin-development Skill for other failure causes, repair procedures, and complete extension patterns.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.\n\n## Writing code for run_code\n\n`run_code` takes two required arguments: `code` — the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped) — and `description`, a short summary of what the program does. Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs. */\n  cordis_define: {\n    plugin: {\n      kind: \"new\";\n      /** Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix. */\n      idPrefix: string;\n    } | {\n      kind: \"existing\";\n      /** Exact ID of an existing Plugin; the new Package is appended to that instance. */\n      pluginId: string;\n    };\n    /** Short, readable Package name. */\n    name: string;\n    /** One-sentence, user-facing description of the Package purpose. */\n    purpose: string;\n    code: {\n      /** Plain JavaScript function body that returns the Host-half Cordis Plugin. */\n      host?: string;\n      /** Plain JavaScript function body that returns the browser Client-half Cordis Plugin. */\n      client?: string;\n    };\n  } & Record<string, JsonValue>;\n  /** List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call. */\n  cordis_inspect_list: Record<string, JsonValue>;\n  /** Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props. */\n  cordis_inspect_query: {\n    /** Runtime platform that owns the Provider. */\n    platform: \"host\" | \"client\";\n    /** Exact Provider ID returned by cordis_inspect_list. */\n    provider: string;\n    /** Exact method name declared by the Provider manifest. */\n    method: string;\n    /** Optional query input; it must satisfy the method input schema. */\n    input?: JsonValue;\n  } & Record<string, JsonValue>;\n  /** Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers. */\n  cordis_inspect_self: {\n    /** Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin. */\n    pluginId?: string;\n    /** Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned. */\n    packageId?: string;\n  } & Record<string, JsonValue>;\n  /** Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it. */\n  cordis_run: {\n    /** Stable Plugin ID returned by cordis_define. */\n    pluginId: string;\n    /** Exact immutable Package ID to activate under that Plugin. */\n    packageId: string;\n    /** Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package. */\n    mode: \"run\" | \"update\";\n  } & Record<string, JsonValue>;\n  /** Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal. */\n  cordis_stop: {\n    /** Stable dynamic Plugin ID to stop. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead. */\n  cordis_undefine: {\n    /** Stable dynamic Plugin ID to remove permanently. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op. */\n  interrupt_agent: {\n    /** The agent id of the running agent to interrupt. */\n    agent_id: string;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops. */\n  job_kill: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the job. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background jobs (running and finished) with their ids, kinds, and statuses. */\n  job_list: Record<string, JsonValue>;\n  /** Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap. */\n  job_output: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n  } & Record<string, JsonValue>;\n  /** Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn. The workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result. Script-body hooks: - `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly. - `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages. - `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_define: {\n    pluginId: string;\n    packageId: string;\n    name: string;\n    purpose: string;\n    hasHostHalf: boolean;\n    hasClientHalf: boolean;\n  };\n  cordis_inspect_list: JsonValue;\n  cordis_inspect_query: JsonValue;\n  cordis_inspect_self: JsonValue;\n  cordis_run: JsonValue;\n  cordis_stop: {\n    pluginId: string;\n  };\n  cordis_undefine: {\n    pluginId: string;\n    wasRunning: boolean;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  interrupt_agent: {\n    accepted: boolean;\n  };\n  job_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  job_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  job_output: {\n    text: string;\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"cordis_define","description":"Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs.","parameters":{"type":"object","properties":{"plugin":{"oneOf":[{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"new"},"idPrefix":{"type":"string","description":"Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix."}},"required":["kind","idPrefix"]},{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"existing"},"pluginId":{"type":"string","description":"Exact ID of an existing Plugin; the new Package is appended to that instance."}},"required":["kind","pluginId"]}]},"name":{"type":"string","description":"Short, readable Package name."},"purpose":{"type":"string","description":"One-sentence, user-facing description of the Package purpose."},"code":{"type":"object","additionalProperties":false,"properties":{"host":{"type":"string","description":"Plain JavaScript function body that returns the Host-half Cordis Plugin."},"client":{"type":"string","description":"Plain JavaScript function body that returns the browser Client-half Cordis Plugin."}}}},"required":["plugin","name","purpose","code"]}},{"name":"cordis_inspect_list","description":"List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call.","parameters":{"type":"object","properties":{}}},{"name":"cordis_inspect_query","description":"Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props.","parameters":{"type":"object","properties":{"platform":{"type":"string","description":"Runtime platform that owns the Provider.","enum":["host","client"]},"provider":{"type":"string","description":"Exact Provider ID returned by cordis_inspect_list."},"method":{"type":"string","description":"Exact method name declared by the Provider manifest."},"input":{"description":"Optional query input; it must satisfy the method input schema."}},"required":["platform","provider","method"]}},{"name":"cordis_inspect_self","description":"Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin."},"packageId":{"type":"string","description":"Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned."}}}},{"name":"cordis_run","description":"Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define."},"packageId":{"type":"string","description":"Exact immutable Package ID to activate under that Plugin."},"mode":{"type":"string","description":"Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package.","enum":["run","update"]}},"required":["pluginId","packageId","mode"]}},{"name":"cordis_stop","description":"Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to stop."}},"required":["pluginId"]}},{"name":"cordis_undefine","description":"Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to remove permanently."}},"required":["pluginId"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"run_code","description":"Execute a TypeScript program against the available tools. Takes two required arguments: `code`, the BODY of an async function (erasable syntax only; top-level `await` and `return` work), and `description`, a short summary of what the program does. Call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
-{"type":"request/context","seq":9,"time":1785730501646,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":10,"time":1783957884701,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":11,"time":1783957884701,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"WORKFLOW_CHILD_OK"}}}
-{"type":"assistant/chunk","seq":12,"time":1783957884701,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"WORKFLOW_CHILD_OK"}}}}
-{"type":"assistant/chunk","seq":13,"time":1785498584067,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":14,"time":1785730501646,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":15,"time":1785730501646,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"WORKFLOW_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cd78f077-1fad-4cdc-ab56-09d39d9095cd"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
-{"type":"step/end","seq":16,"time":1785730501646,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":17,"time":1785730501646,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"8b3cd23c-82f1-4903-8a3f-b9082059b40c"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"8b3cd23c-82f1-4903-8a3f-b9082059b40c"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"823e5037-9e96-4ef5-8c5b-cbe73b993ee2"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly WORKFLOW_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\n# Dynamic Cordis Plugins\n\nDynamic Cordis plugins temporarily extend the current DSH process. A Plugin uses apply(ctx) to consume Services, listen to Events, provide Services, register model Tools, or register browser UI in Slots.\n\n- Plugin and Package definitions exist only in the current process. define itself does not modify repository source, configuration, or disk, and definitions do not survive a process restart.\n- The restricted execution environment prevents accidental misuse; it is not a security boundary for malicious code. Services obtained by dynamic code connect to the real runtime.\n\n## Make the user-facing plan clear first\n\n- Dynamic Cordis Plugins are one available implementation mechanism, not the default for every request. Consider whether one could help only when the user intends to design or create something, or when a temporary interface could materially aid the current work. The presence of these instructions or Tools, and discussion of Cordis itself, do not make a request a dynamic-Plugin task.\n- When Cordis is a plausible fit, infer the intended work target and lifetime from the request and conversation. Use it only when the outcome belongs to the current running harness and should be delivered as a temporary runtime extension. If that distinction is materially ambiguous, ask at most one concise question about the intended result or lifetime. Otherwise proceed with the matching workflow; do not require the user to know or choose Cordis as an implementation mechanism.\n- Once a dynamic Plugin is appropriate, decide whether the task creates a new Plugin or modifies the Plugin named by the user with @pluginId. Proceed directly when the goal is clear; do not ask for repeated confirmation.\n- Choose Host, Client, or both from the requested outcome. Do not propose a Client/browser UI when the task does not need visible page behavior, and do not avoid Client when the requested outcome is visual, interactive, or depends on page state. Host versus Client is an implementation choice; do not make the user choose it.\n- When a design direction or a potentially useful interface would materially affect the result, ask at most one concise outcome or creative-preference question and offer a few candidate directions. Otherwise proceed directly; do not conduct a multi-round interview or a complex questionnaire.\n- cordis_define only defines and presents code; it does not run it. After definition, explain the pluginId and packageId returned by the Host and whether the next step is a run or update.\n- cordis_run may require user approval. When it returns awaiting-approval, explain that the user must allow or reject it in the UI. Do not wait, retry, or claim that it is running.\n- When it returns starting, explain that the request has entered the asynchronous flow and the Client is still activating. starting does not mean success. Wait for the system to report the final result through steering context.\n- Do not request approval again after the user rejects it. After a technical failure, fix the same Plugin from its diagnostics; do not silently create a replacement Plugin.\n\n## Recommended workflow and Tools\n\nBefore creating, modifying, or repairing a Plugin, load the cordis-plugin-development Skill. The Skill provides requirement navigation, capability composition, complete examples, and troubleshooting. Treat Inspect Provider results as the source of truth for exact APIs.\n\n1. cordis_inspect_list: discover the current Host and Client Providers and their read-only query methods.\n2. cordis_inspect_query: use the returned platform, provider, method, and schema to query exact Service, Event, Builtin, Slot, Theme token, or Tool information.\n3. cordis_inspect_self: inspect the current Session's Plugins, Packages, version pointers, source, and diagnostics. Source is returned only when both pluginId and packageId are specified.\n4. cordis_define: create the first Package for a new Plugin or append an immutable Package to an existing Plugin. It defines code but does not run it.\n5. cordis_run: activate an exact Package. Use run for the first activation, restarting current, or rollback; use update to switch versions.\n6. cordis_stop: remove the current Run and pending approval request while retaining definitions, grants, and version pointers.\n7. cordis_undefine: permanently stop and delete a Plugin and all of its Packages. Use it only after confirming that the user no longer needs them.\n\n- Inspect and Catalog data only confirm capabilities, names, signatures, types, and registration protocols before code is written; they do not replace business APIs.\n- Query Service.listService and Event.listEvents without input to choose from their compact signature directories, then query the exact service or event before using it. Exact queries return the structured contract and only its referenced types.\n- At runtime, a Plugin must call real Services or listen to real Events. Do not cache, display, or depend on Inspect results as business data.\n\n## Identity, versions, and approval\n\n- pluginId identifies a Plugin that can be modified over time. For a new Plugin, submit only a semantic idPrefix of 3–6 lowercase English letters; the Host allocates the final ID.\n- packageId identifies one immutable Host/Client source version under a Plugin. To change code, define a new Package; never overwrite an old version.\n- pluginRunId identifies one activation attempt and connects its approval, Host/Client loading, private RPC, Run card, and errors.\n- currentPackageId is the most recent fully successful Package. Stopping, starting an update, or failing an update does not clear it.\n- nextPackageId is the target awaiting approval, being attempted, awaiting Client activation, or most recently failed.\n- A single check mark authorizes only the current Package; double check marks authorize future versions of the same Plugin. A grant remains in effect after a technical failure.\n- An update stops the old Run before starting the target Package. Failure does not automatically restart the old version; retry next with update or roll back to current with run.\n\nWhen the user enters @pluginId, the system injects identity, the default base Package, version pointers, and runtime status, but not source code:\n\n1. Call cordis_inspect_self(pluginId, packageId) to read the target source.\n2. Use cordis_define in existing mode to append a Package to the same Plugin.\n3. Call cordis_run in run or update mode according to the version relationship.\n\nNever silently create another Plugin for @pluginId. If the reference is unavailable because it was removed, belongs to another Session, or was lost on process restart, tell the user directly.\n\n## High-frequency errors that must be avoided\n\n### Services: ctx.get and inject\n\n- Read an optional Service with ctx.get('serviceName') by default and handle undefined.\n- Declare inject: ['serviceName'] on the returned Plugin object only when the Service is a hard dependency and the Plugin must enter waiting until Cordis reactivates it after the Service appears.\n- Read ctx.serviceName only after declaring that Service in inject. Never access an undeclared Service as a ctx property.\n\n```js\nreturn {\n  inject: ['requiredService'],\n  apply(ctx) {\n    ctx.requiredService.someMethod()\n    const optionalService = ctx.get('optionalService')\n    if (optionalService !== undefined) optionalService.someMethod()\n  },\n}\n```\n\n### Code: use plain JavaScript only\n\n- Host and Client code is not transformed by TypeScript, JSX, or a bundler.\n- Do not use TypeScript types, as, decorators, import, require, or JSX.\n- Client React code must use React.createElement(...); never write <Component />.\n- Do not assume that process, Buffer, window, document, fetch, native timers, or any other global is available. Query the corresponding platform's Builtins and Services first.\n\n### Data: do not serialize live data\n\n- Services, Events, Slots, Sessions, and their derived Cordis/DSH objects are internal live data, not ordinary JSON that can be dumped.\n- Do not apply JSON.stringify, structuredClone, recursive enumeration, full copying, or whole-object display to live data.\n- Read only the leaf fields required by the task, then construct the smallest owned data object without Host references.\n\n### Lifecycle: every side effect must be reversible\n\n- Services, Events, Tools, handlers, timers, Slots, styles, and theme overrides must all belong to the current Fiber.\n- Use ctx.effect(), ctx.on(), or official APIs that return a disposer so stop, update, or undefine removes every side effect.\n- The cordis-plugin-development Skill contains complete timer, Waterfall, Slot, theme, Tool, RPC, and React examples and troubleshooting guidance.\n\n## Host and Client\n\n- Host runs in the DSH Node.js process and is appropriate for files, networking, commands, Agent/Session access, Host Events, Services, model Tools, and JSON methods callable by the Client.\n- Client runs in the browser page and is appropriate for themes, layout, current page state, Tool cards, and Slot UI.\n- Host and Client communicate through Package-private JSON methods: Host uses harness.handle(method, handler), and Client uses host.call(method, args). The direction is Client→Host, and only lossless JSON may cross it.\n- Client UI must be registered in a queried Slot; apply() cannot directly return a React Element. Query Slots.listSubTree without root to choose from the compact purpose/topology tree, then query the exact root for its full registration contract and props before writing code.\n- See the Skill and Inspect Providers for Run-specific panels and exact Slot registration patterns.\n\n## Asynchronous results and recovery\n\n- Do not wait inside a Tool for approval or browser work that can happen only after the current turn ends.\n- Asynchronous success, rejection, and runtime errors update Run state and notify you through steering context.\n- After a technical failure, use cordis_inspect_self to read the exact Package source and its message/stack. Define a corrected Package under the same Plugin and retry autonomously.\n- Use the cordis-plugin-development Skill for other failure causes, repair procedures, and complete extension patterns.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.\n\n## Writing code for run_code\n\n`run_code` takes two required arguments: `code` — the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped) — and `description`, a short summary of what the program does. Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs. */\n  cordis_define: {\n    plugin: {\n      kind: \"new\";\n      /** Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix. */\n      idPrefix: string;\n    } | {\n      kind: \"existing\";\n      /** Exact ID of an existing Plugin; the new Package is appended to that instance. */\n      pluginId: string;\n    };\n    /** Short, readable Package name. */\n    name: string;\n    /** One-sentence, user-facing description of the Package purpose. */\n    purpose: string;\n    code: {\n      /** Plain JavaScript function body that returns the Host-half Cordis Plugin. */\n      host?: string;\n      /** Plain JavaScript function body that returns the browser Client-half Cordis Plugin. */\n      client?: string;\n    };\n  } & Record<string, JsonValue>;\n  /** List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call. */\n  cordis_inspect_list: Record<string, JsonValue>;\n  /** Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props. */\n  cordis_inspect_query: {\n    /** Runtime platform that owns the Provider. */\n    platform: \"host\" | \"client\";\n    /** Exact Provider ID returned by cordis_inspect_list. */\n    provider: string;\n    /** Exact method name declared by the Provider manifest. */\n    method: string;\n    /** Optional query input; it must satisfy the method input schema. */\n    input?: JsonValue;\n  } & Record<string, JsonValue>;\n  /** Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers. */\n  cordis_inspect_self: {\n    /** Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin. */\n    pluginId?: string;\n    /** Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned. */\n    packageId?: string;\n  } & Record<string, JsonValue>;\n  /** Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it. */\n  cordis_run: {\n    /** Stable Plugin ID returned by cordis_define. */\n    pluginId: string;\n    /** Exact immutable Package ID to activate under that Plugin. */\n    packageId: string;\n    /** Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package. */\n    mode: \"run\" | \"update\";\n  } & Record<string, JsonValue>;\n  /** Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal. */\n  cordis_stop: {\n    /** Stable dynamic Plugin ID to stop. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead. */\n  cordis_undefine: {\n    /** Stable dynamic Plugin ID to remove permanently. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op. */\n  interrupt_agent: {\n    /** The agent id of the running agent to interrupt. */\n    agent_id: string;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops. */\n  job_kill: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the job. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background jobs (running and finished) with their ids, kinds, and statuses. */\n  job_list: Record<string, JsonValue>;\n  /** Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap. */\n  job_output: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n  } & Record<string, JsonValue>;\n  /** Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn. The workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result. Script-body hooks: - `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly. - `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages. - `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_define: {\n    pluginId: string;\n    packageId: string;\n    name: string;\n    purpose: string;\n    hasHostHalf: boolean;\n    hasClientHalf: boolean;\n  };\n  cordis_inspect_list: JsonValue;\n  cordis_inspect_query: JsonValue;\n  cordis_inspect_self: JsonValue;\n  cordis_run: JsonValue;\n  cordis_stop: {\n    pluginId: string;\n  };\n  cordis_undefine: {\n    pluginId: string;\n    wasRunning: boolean;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  interrupt_agent: {\n    accepted: boolean;\n  };\n  job_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  job_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  job_output: {\n    text: string;\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"cordis_define","description":"Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs.","parameters":{"type":"object","properties":{"plugin":{"oneOf":[{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"new"},"idPrefix":{"type":"string","description":"Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix."}},"required":["kind","idPrefix"]},{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"existing"},"pluginId":{"type":"string","description":"Exact ID of an existing Plugin; the new Package is appended to that instance."}},"required":["kind","pluginId"]}]},"name":{"type":"string","description":"Short, readable Package name."},"purpose":{"type":"string","description":"One-sentence, user-facing description of the Package purpose."},"code":{"type":"object","additionalProperties":false,"properties":{"host":{"type":"string","description":"Plain JavaScript function body that returns the Host-half Cordis Plugin."},"client":{"type":"string","description":"Plain JavaScript function body that returns the browser Client-half Cordis Plugin."}}}},"required":["plugin","name","purpose","code"]}},{"name":"cordis_inspect_list","description":"List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call.","parameters":{"type":"object","properties":{}}},{"name":"cordis_inspect_query","description":"Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props.","parameters":{"type":"object","properties":{"platform":{"type":"string","description":"Runtime platform that owns the Provider.","enum":["host","client"]},"provider":{"type":"string","description":"Exact Provider ID returned by cordis_inspect_list."},"method":{"type":"string","description":"Exact method name declared by the Provider manifest."},"input":{"description":"Optional query input; it must satisfy the method input schema."}},"required":["platform","provider","method"]}},{"name":"cordis_inspect_self","description":"Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin."},"packageId":{"type":"string","description":"Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned."}}}},{"name":"cordis_run","description":"Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define."},"packageId":{"type":"string","description":"Exact immutable Package ID to activate under that Plugin."},"mode":{"type":"string","description":"Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package.","enum":["run","update"]}},"required":["pluginId","packageId","mode"]}},{"name":"cordis_stop","description":"Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to stop."}},"required":["pluginId"]}},{"name":"cordis_undefine","description":"Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to remove permanently."}},"required":["pluginId"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"run_code","description":"Execute a TypeScript program against the available tools. Takes two required arguments: `code`, the BODY of an async function (erasable syntax only; top-level `await` and `return` work), and `description`, a short summary of what the program does. Call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"WORKFLOW_CHILD_OK"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"WORKFLOW_CHILD_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"WORKFLOW_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cd78f077-1fad-4cdc-ab56-09d39d9095cd"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl
index 19e4ec8138..c49d9b2745 100644
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl
@@ -1,75 +1,75 @@
 {"type":"session","version":0,"id":"11111111-1111-4111-8111-111111111111","createdAt":1783950000000,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498583746,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this advanced flow exactly once: define a host-only dynamic Cordis Package named Snapshot Marker; run and inspect snap-1/pkg-1 through run_code; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; remove snap-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"8a0ac233-283c-4eb4-8bbd-5c50b7e99afe"}]}}
-{"type":"turn/start","seq":1,"time":1785821454304,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821454304,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1783957884486,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498583779,"data":{"content":[{"type":"text","text":"Run this advanced flow exactly once: define a host-only dynamic Cordis Package named Snapshot Marker; run and inspect snap-1/pkg-1 through run_code; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; remove snap-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"8a0ac233-283c-4eb4-8bbd-5c50b7e99afe"},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1785498583779,"data":{"title":"Run this advanced flow exactly","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":6,"time":1785498583782,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\n# Dynamic Cordis Plugins\n\nDynamic Cordis plugins temporarily extend the current DSH process. A Plugin uses apply(ctx) to consume Services, listen to Events, provide Services, register model Tools, or register browser UI in Slots.\n\n- Plugin and Package definitions exist only in the current process. define itself does not modify repository source, configuration, or disk, and definitions do not survive a process restart.\n- The restricted execution environment prevents accidental misuse; it is not a security boundary for malicious code. Services obtained by dynamic code connect to the real runtime.\n\n## Make the user-facing plan clear first\n\n- Dynamic Cordis Plugins are one available implementation mechanism, not the default for every request. Consider whether one could help only when the user intends to design or create something, or when a temporary interface could materially aid the current work. The presence of these instructions or Tools, and discussion of Cordis itself, do not make a request a dynamic-Plugin task.\n- When Cordis is a plausible fit, infer the intended work target and lifetime from the request and conversation. Use it only when the outcome belongs to the current running harness and should be delivered as a temporary runtime extension. If that distinction is materially ambiguous, ask at most one concise question about the intended result or lifetime. Otherwise proceed with the matching workflow; do not require the user to know or choose Cordis as an implementation mechanism.\n- Once a dynamic Plugin is appropriate, decide whether the task creates a new Plugin or modifies the Plugin named by the user with @pluginId. Proceed directly when the goal is clear; do not ask for repeated confirmation.\n- Choose Host, Client, or both from the requested outcome. Do not propose a Client/browser UI when the task does not need visible page behavior, and do not avoid Client when the requested outcome is visual, interactive, or depends on page state. Host versus Client is an implementation choice; do not make the user choose it.\n- When a design direction or a potentially useful interface would materially affect the result, ask at most one concise outcome or creative-preference question and offer a few candidate directions. Otherwise proceed directly; do not conduct a multi-round interview or a complex questionnaire.\n- cordis_define only defines and presents code; it does not run it. After definition, explain the pluginId and packageId returned by the Host and whether the next step is a run or update.\n- cordis_run may require user approval. When it returns awaiting-approval, explain that the user must allow or reject it in the UI. Do not wait, retry, or claim that it is running.\n- When it returns starting, explain that the request has entered the asynchronous flow and the Client is still activating. starting does not mean success. Wait for the system to report the final result through steering context.\n- Do not request approval again after the user rejects it. After a technical failure, fix the same Plugin from its diagnostics; do not silently create a replacement Plugin.\n\n## Recommended workflow and Tools\n\nBefore creating, modifying, or repairing a Plugin, load the cordis-plugin-development Skill. The Skill provides requirement navigation, capability composition, complete examples, and troubleshooting. Treat Inspect Provider results as the source of truth for exact APIs.\n\n1. cordis_inspect_list: discover the current Host and Client Providers and their read-only query methods.\n2. cordis_inspect_query: use the returned platform, provider, method, and schema to query exact Service, Event, Builtin, Slot, Theme token, or Tool information.\n3. cordis_inspect_self: inspect the current Session's Plugins, Packages, version pointers, source, and diagnostics. Source is returned only when both pluginId and packageId are specified.\n4. cordis_define: create the first Package for a new Plugin or append an immutable Package to an existing Plugin. It defines code but does not run it.\n5. cordis_run: activate an exact Package. Use run for the first activation, restarting current, or rollback; use update to switch versions.\n6. cordis_stop: remove the current Run and pending approval request while retaining definitions, grants, and version pointers.\n7. cordis_undefine: permanently stop and delete a Plugin and all of its Packages. Use it only after confirming that the user no longer needs them.\n\n- Inspect and Catalog data only confirm capabilities, names, signatures, types, and registration protocols before code is written; they do not replace business APIs.\n- Query Service.listService and Event.listEvents without input to choose from their compact signature directories, then query the exact service or event before using it. Exact queries return the structured contract and only its referenced types.\n- At runtime, a Plugin must call real Services or listen to real Events. Do not cache, display, or depend on Inspect results as business data.\n\n## Identity, versions, and approval\n\n- pluginId identifies a Plugin that can be modified over time. For a new Plugin, submit only a semantic idPrefix of 3–6 lowercase English letters; the Host allocates the final ID.\n- packageId identifies one immutable Host/Client source version under a Plugin. To change code, define a new Package; never overwrite an old version.\n- pluginRunId identifies one activation attempt and connects its approval, Host/Client loading, private RPC, Run card, and errors.\n- currentPackageId is the most recent fully successful Package. Stopping, starting an update, or failing an update does not clear it.\n- nextPackageId is the target awaiting approval, being attempted, awaiting Client activation, or most recently failed.\n- A single check mark authorizes only the current Package; double check marks authorize future versions of the same Plugin. A grant remains in effect after a technical failure.\n- An update stops the old Run before starting the target Package. Failure does not automatically restart the old version; retry next with update or roll back to current with run.\n\nWhen the user enters @pluginId, the system injects identity, the default base Package, version pointers, and runtime status, but not source code:\n\n1. Call cordis_inspect_self(pluginId, packageId) to read the target source.\n2. Use cordis_define in existing mode to append a Package to the same Plugin.\n3. Call cordis_run in run or update mode according to the version relationship.\n\nNever silently create another Plugin for @pluginId. If the reference is unavailable because it was removed, belongs to another Session, or was lost on process restart, tell the user directly.\n\n## High-frequency errors that must be avoided\n\n### Services: ctx.get and inject\n\n- Read an optional Service with ctx.get('serviceName') by default and handle undefined.\n- Declare inject: ['serviceName'] on the returned Plugin object only when the Service is a hard dependency and the Plugin must enter waiting until Cordis reactivates it after the Service appears.\n- Read ctx.serviceName only after declaring that Service in inject. Never access an undeclared Service as a ctx property.\n\n```js\nreturn {\n  inject: ['requiredService'],\n  apply(ctx) {\n    ctx.requiredService.someMethod()\n    const optionalService = ctx.get('optionalService')\n    if (optionalService !== undefined) optionalService.someMethod()\n  },\n}\n```\n\n### Code: use plain JavaScript only\n\n- Host and Client code is not transformed by TypeScript, JSX, or a bundler.\n- Do not use TypeScript types, as, decorators, import, require, or JSX.\n- Client React code must use React.createElement(...); never write <Component />.\n- Do not assume that process, Buffer, window, document, fetch, native timers, or any other global is available. Query the corresponding platform's Builtins and Services first.\n\n### Data: do not serialize live data\n\n- Services, Events, Slots, Sessions, and their derived Cordis/DSH objects are internal live data, not ordinary JSON that can be dumped.\n- Do not apply JSON.stringify, structuredClone, recursive enumeration, full copying, or whole-object display to live data.\n- Read only the leaf fields required by the task, then construct the smallest owned data object without Host references.\n\n### Lifecycle: every side effect must be reversible\n\n- Services, Events, Tools, handlers, timers, Slots, styles, and theme overrides must all belong to the current Fiber.\n- Use ctx.effect(), ctx.on(), or official APIs that return a disposer so stop, update, or undefine removes every side effect.\n- The cordis-plugin-development Skill contains complete timer, Waterfall, Slot, theme, Tool, RPC, and React examples and troubleshooting guidance.\n\n## Host and Client\n\n- Host runs in the DSH Node.js process and is appropriate for files, networking, commands, Agent/Session access, Host Events, Services, model Tools, and JSON methods callable by the Client.\n- Client runs in the browser page and is appropriate for themes, layout, current page state, Tool cards, and Slot UI.\n- Host and Client communicate through Package-private JSON methods: Host uses harness.handle(method, handler), and Client uses host.call(method, args). The direction is Client→Host, and only lossless JSON may cross it.\n- Client UI must be registered in a queried Slot; apply() cannot directly return a React Element. Query Slots.listSubTree without root to choose from the compact purpose/topology tree, then query the exact root for its full registration contract and props before writing code.\n- See the Skill and Inspect Providers for Run-specific panels and exact Slot registration patterns.\n\n## Asynchronous results and recovery\n\n- Do not wait inside a Tool for approval or browser work that can happen only after the current turn ends.\n- Asynchronous success, rejection, and runtime errors update Run state and notify you through steering context.\n- After a technical failure, use cordis_inspect_self to read the exact Package source and its message/stack. Define a corrected Package under the same Plugin and retry autonomously.\n- Use the cordis-plugin-development Skill for other failure causes, repair procedures, and complete extension patterns.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.\n\n## Writing code for run_code\n\n`run_code` takes two required arguments: `code` — the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped) — and `description`, a short summary of what the program does. Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs. */\n  cordis_define: {\n    plugin: {\n      kind: \"new\";\n      /** Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix. */\n      idPrefix: string;\n    } | {\n      kind: \"existing\";\n      /** Exact ID of an existing Plugin; the new Package is appended to that instance. */\n      pluginId: string;\n    };\n    /** Short, readable Package name. */\n    name: string;\n    /** One-sentence, user-facing description of the Package purpose. */\n    purpose: string;\n    code: {\n      /** Plain JavaScript function body that returns the Host-half Cordis Plugin. */\n      host?: string;\n      /** Plain JavaScript function body that returns the browser Client-half Cordis Plugin. */\n      client?: string;\n    };\n  } & Record<string, JsonValue>;\n  /** List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call. */\n  cordis_inspect_list: Record<string, JsonValue>;\n  /** Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props. */\n  cordis_inspect_query: {\n    /** Runtime platform that owns the Provider. */\n    platform: \"host\" | \"client\";\n    /** Exact Provider ID returned by cordis_inspect_list. */\n    provider: string;\n    /** Exact method name declared by the Provider manifest. */\n    method: string;\n    /** Optional query input; it must satisfy the method input schema. */\n    input?: JsonValue;\n  } & Record<string, JsonValue>;\n  /** Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers. */\n  cordis_inspect_self: {\n    /** Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin. */\n    pluginId?: string;\n    /** Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned. */\n    packageId?: string;\n  } & Record<string, JsonValue>;\n  /** Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it. */\n  cordis_run: {\n    /** Stable Plugin ID returned by cordis_define. */\n    pluginId: string;\n    /** Exact immutable Package ID to activate under that Plugin. */\n    packageId: string;\n    /** Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package. */\n    mode: \"run\" | \"update\";\n  } & Record<string, JsonValue>;\n  /** Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal. */\n  cordis_stop: {\n    /** Stable dynamic Plugin ID to stop. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead. */\n  cordis_undefine: {\n    /** Stable dynamic Plugin ID to remove permanently. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op. */\n  interrupt_agent: {\n    /** The agent id of the running agent to interrupt. */\n    agent_id: string;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops. */\n  job_kill: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the job. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background jobs (running and finished) with their ids, kinds, and statuses. */\n  job_list: Record<string, JsonValue>;\n  /** Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap. */\n  job_output: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n  } & Record<string, JsonValue>;\n  /** Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn. The workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result. Script-body hooks: - `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly. - `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages. - `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_define: {\n    pluginId: string;\n    packageId: string;\n    name: string;\n    purpose: string;\n    hasHostHalf: boolean;\n    hasClientHalf: boolean;\n  };\n  cordis_inspect_list: JsonValue;\n  cordis_inspect_query: JsonValue;\n  cordis_inspect_self: JsonValue;\n  cordis_run: JsonValue;\n  cordis_stop: {\n    pluginId: string;\n  };\n  cordis_undefine: {\n    pluginId: string;\n    wasRunning: boolean;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  interrupt_agent: {\n    accepted: boolean;\n  };\n  job_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  job_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  job_output: {\n    text: string;\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"cordis_define","description":"Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs.","parameters":{"type":"object","properties":{"plugin":{"oneOf":[{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"new"},"idPrefix":{"type":"string","description":"Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix."}},"required":["kind","idPrefix"]},{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"existing"},"pluginId":{"type":"string","description":"Exact ID of an existing Plugin; the new Package is appended to that instance."}},"required":["kind","pluginId"]}]},"name":{"type":"string","description":"Short, readable Package name."},"purpose":{"type":"string","description":"One-sentence, user-facing description of the Package purpose."},"code":{"type":"object","additionalProperties":false,"properties":{"host":{"type":"string","description":"Plain JavaScript function body that returns the Host-half Cordis Plugin."},"client":{"type":"string","description":"Plain JavaScript function body that returns the browser Client-half Cordis Plugin."}}}},"required":["plugin","name","purpose","code"]}},{"name":"cordis_inspect_list","description":"List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call.","parameters":{"type":"object","properties":{}}},{"name":"cordis_inspect_query","description":"Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props.","parameters":{"type":"object","properties":{"platform":{"type":"string","description":"Runtime platform that owns the Provider.","enum":["host","client"]},"provider":{"type":"string","description":"Exact Provider ID returned by cordis_inspect_list."},"method":{"type":"string","description":"Exact method name declared by the Provider manifest."},"input":{"description":"Optional query input; it must satisfy the method input schema."}},"required":["platform","provider","method"]}},{"name":"cordis_inspect_self","description":"Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin."},"packageId":{"type":"string","description":"Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned."}}}},{"name":"cordis_run","description":"Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define."},"packageId":{"type":"string","description":"Exact immutable Package ID to activate under that Plugin."},"mode":{"type":"string","description":"Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package.","enum":["run","update"]}},"required":["pluginId","packageId","mode"]}},{"name":"cordis_stop","description":"Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to stop."}},"required":["pluginId"]}},{"name":"cordis_undefine","description":"Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to remove permanently."}},"required":["pluginId"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"run_code","description":"Execute a TypeScript program against the available tools. Takes two required arguments: `code`, the BODY of an async function (erasable syntax only; top-level `await` and `return` work), and `description`, a short summary of what the program does. Call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
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-{"type":"assistant/chunk","seq":10,"time":1783950000009,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-define","name":"cordis_define","arguments":"{\"plugin\":{\"kind\":\"new\",\"idPrefix\":\"snap\"},\"name\":\"Snapshot Marker\",\"purpose\":\"Exercise the dynamic Cordis Package lifecycle in the snapshot.\",\"code\":{\"host\":\"return { apply() {} }\"}}"}}}}
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-{"type":"tool/call","seq":14,"time":1785730501404,"data":{"turn":1,"step":1,"callId":"advanced-define","name":"cordis_define","arguments":"{\"plugin\":{\"kind\":\"new\",\"idPrefix\":\"snap\"},\"name\":\"Snapshot Marker\",\"purpose\":\"Exercise the dynamic Cordis Package lifecycle in the snapshot.\",\"code\":{\"host\":\"return { apply() {} }\"}}"}}
-{"type":"tool/result","seq":15,"time":1785730501413,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"advanced-define"},"content":[{"type":"tool-result","toolCallId":"advanced-define","content":[{"type":"text","text":"Defined snap-1/pkg-1 (Snapshot Marker); it is not running yet. Use cordis_run to activate this Package."}],"isError":false}],"role":"user","id":"9fd9ba62-1b6d-4bb7-98c6-97815e983026"},"meta":{"pluginId":"snap-1","packageId":"pkg-1"}},"sourceEventSeqs":[14],"surfaceOp":"append"}
-{"type":"step/end","seq":16,"time":1785730501413,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":17,"time":1785730501423,"data":{"turn":1,"step":2}}
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-{"type":"assistant/chunk","seq":20,"time":1783950000019,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\":\"const run = await tools.cordis_run({ pluginId: 'snap-1', packageId: 'pkg-1', mode: 'run' });\\nconst inspected = await tools.cordis_inspect_self({ pluginId: 'snap-1' });\\nreturn { run, inspected };\",\"description\":\"Run and inspect the dynamic Cordis Package\"}"}}}}
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-{"type":"assistant/chunk","seq":22,"time":1785730501424,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":23,"time":1785730501424,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\":\"const run = await tools.cordis_run({ pluginId: 'snap-1', packageId: 'pkg-1', mode: 'run' });\\nconst inspected = await tools.cordis_inspect_self({ pluginId: 'snap-1' });\\nreturn { run, inspected };\",\"description\":\"Run and inspect the dynamic Cordis Package\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6f6c3cc3-350b-4afb-a3d1-8f91b9494628"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[18,19,20,21,22],"surfaceOp":"append"}
-{"type":"tool/call","seq":24,"time":1785730501424,"data":{"turn":1,"step":2,"callId":"advanced-code","name":"run_code","arguments":"{\"code\":\"const run = await tools.cordis_run({ pluginId: 'snap-1', packageId: 'pkg-1', mode: 'run' });\\nconst inspected = await tools.cordis_inspect_self({ pluginId: 'snap-1' });\\nreturn { run, inspected };\",\"description\":\"Run and inspect the dynamic Cordis Package\"}"}}
-{"type":"tool/code-dispatch-start","seq":25,"time":1785730501473,"data":{"rootCallId":"advanced-code","parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_run","arguments":{"pluginId":"snap-1","packageId":"pkg-1","mode":"run"}}}
-{"type":"tool/code-dispatch","seq":26,"time":1785730501474,"data":{"rootCallId":"advanced-code","parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_run","arguments":{"pluginId":"snap-1","packageId":"pkg-1","mode":"run"},"isError":false,"content":[{"type":"text","text":"snap-1/pkg-1 is running (run-1)."}]}}
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+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model. Your working directory is {{cwd}}.\n\nVerify your work by running the code or tests. Keep answers brief and factual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\n# Dynamic Cordis Plugins\n\nDynamic Cordis plugins temporarily extend the current DSH process. A Plugin uses apply(ctx) to consume Services, listen to Events, provide Services, register model Tools, or register browser UI in Slots.\n\n- Plugin and Package definitions exist only in the current process. define itself does not modify repository source, configuration, or disk, and definitions do not survive a process restart.\n- The restricted execution environment prevents accidental misuse; it is not a security boundary for malicious code. Services obtained by dynamic code connect to the real runtime.\n\n## Make the user-facing plan clear first\n\n- Dynamic Cordis Plugins are one available implementation mechanism, not the default for every request. Consider whether one could help only when the user intends to design or create something, or when a temporary interface could materially aid the current work. The presence of these instructions or Tools, and discussion of Cordis itself, do not make a request a dynamic-Plugin task.\n- When Cordis is a plausible fit, infer the intended work target and lifetime from the request and conversation. Use it only when the outcome belongs to the current running harness and should be delivered as a temporary runtime extension. If that distinction is materially ambiguous, ask at most one concise question about the intended result or lifetime. Otherwise proceed with the matching workflow; do not require the user to know or choose Cordis as an implementation mechanism.\n- Once a dynamic Plugin is appropriate, decide whether the task creates a new Plugin or modifies the Plugin named by the user with @pluginId. Proceed directly when the goal is clear; do not ask for repeated confirmation.\n- Choose Host, Client, or both from the requested outcome. Do not propose a Client/browser UI when the task does not need visible page behavior, and do not avoid Client when the requested outcome is visual, interactive, or depends on page state. Host versus Client is an implementation choice; do not make the user choose it.\n- When a design direction or a potentially useful interface would materially affect the result, ask at most one concise outcome or creative-preference question and offer a few candidate directions. Otherwise proceed directly; do not conduct a multi-round interview or a complex questionnaire.\n- cordis_define only defines and presents code; it does not run it. After definition, explain the pluginId and packageId returned by the Host and whether the next step is a run or update.\n- cordis_run may require user approval. When it returns awaiting-approval, explain that the user must allow or reject it in the UI. Do not wait, retry, or claim that it is running.\n- When it returns starting, explain that the request has entered the asynchronous flow and the Client is still activating. starting does not mean success. Wait for the system to report the final result through steering context.\n- Do not request approval again after the user rejects it. After a technical failure, fix the same Plugin from its diagnostics; do not silently create a replacement Plugin.\n\n## Recommended workflow and Tools\n\nBefore creating, modifying, or repairing a Plugin, load the cordis-plugin-development Skill. The Skill provides requirement navigation, capability composition, complete examples, and troubleshooting. Treat Inspect Provider results as the source of truth for exact APIs.\n\n1. cordis_inspect_list: discover the current Host and Client Providers and their read-only query methods.\n2. cordis_inspect_query: use the returned platform, provider, method, and schema to query exact Service, Event, Builtin, Slot, Theme token, or Tool information.\n3. cordis_inspect_self: inspect the current Session's Plugins, Packages, version pointers, source, and diagnostics. Source is returned only when both pluginId and packageId are specified.\n4. cordis_define: create the first Package for a new Plugin or append an immutable Package to an existing Plugin. It defines code but does not run it.\n5. cordis_run: activate an exact Package. Use run for the first activation, restarting current, or rollback; use update to switch versions.\n6. cordis_stop: remove the current Run and pending approval request while retaining definitions, grants, and version pointers.\n7. cordis_undefine: permanently stop and delete a Plugin and all of its Packages. Use it only after confirming that the user no longer needs them.\n\n- Inspect and Catalog data only confirm capabilities, names, signatures, types, and registration protocols before code is written; they do not replace business APIs.\n- Query Service.listService and Event.listEvents without input to choose from their compact signature directories, then query the exact service or event before using it. Exact queries return the structured contract and only its referenced types.\n- At runtime, a Plugin must call real Services or listen to real Events. Do not cache, display, or depend on Inspect results as business data.\n\n## Identity, versions, and approval\n\n- pluginId identifies a Plugin that can be modified over time. For a new Plugin, submit only a semantic idPrefix of 3–6 lowercase English letters; the Host allocates the final ID.\n- packageId identifies one immutable Host/Client source version under a Plugin. To change code, define a new Package; never overwrite an old version.\n- pluginRunId identifies one activation attempt and connects its approval, Host/Client loading, private RPC, Run card, and errors.\n- currentPackageId is the most recent fully successful Package. Stopping, starting an update, or failing an update does not clear it.\n- nextPackageId is the target awaiting approval, being attempted, awaiting Client activation, or most recently failed.\n- A single check mark authorizes only the current Package; double check marks authorize future versions of the same Plugin. A grant remains in effect after a technical failure.\n- An update stops the old Run before starting the target Package. Failure does not automatically restart the old version; retry next with update or roll back to current with run.\n\nWhen the user enters @pluginId, the system injects identity, the default base Package, version pointers, and runtime status, but not source code:\n\n1. Call cordis_inspect_self(pluginId, packageId) to read the target source.\n2. Use cordis_define in existing mode to append a Package to the same Plugin.\n3. Call cordis_run in run or update mode according to the version relationship.\n\nNever silently create another Plugin for @pluginId. If the reference is unavailable because it was removed, belongs to another Session, or was lost on process restart, tell the user directly.\n\n## High-frequency errors that must be avoided\n\n### Services: ctx.get and inject\n\n- Read an optional Service with ctx.get('serviceName') by default and handle undefined.\n- Declare inject: ['serviceName'] on the returned Plugin object only when the Service is a hard dependency and the Plugin must enter waiting until Cordis reactivates it after the Service appears.\n- Read ctx.serviceName only after declaring that Service in inject. Never access an undeclared Service as a ctx property.\n\n```js\nreturn {\n  inject: ['requiredService'],\n  apply(ctx) {\n    ctx.requiredService.someMethod()\n    const optionalService = ctx.get('optionalService')\n    if (optionalService !== undefined) optionalService.someMethod()\n  },\n}\n```\n\n### Code: use plain JavaScript only\n\n- Host and Client code is not transformed by TypeScript, JSX, or a bundler.\n- Do not use TypeScript types, as, decorators, import, require, or JSX.\n- Client React code must use React.createElement(...); never write <Component />.\n- Do not assume that process, Buffer, window, document, fetch, native timers, or any other global is available. Query the corresponding platform's Builtins and Services first.\n\n### Data: do not serialize live data\n\n- Services, Events, Slots, Sessions, and their derived Cordis/DSH objects are internal live data, not ordinary JSON that can be dumped.\n- Do not apply JSON.stringify, structuredClone, recursive enumeration, full copying, or whole-object display to live data.\n- Read only the leaf fields required by the task, then construct the smallest owned data object without Host references.\n\n### Lifecycle: every side effect must be reversible\n\n- Services, Events, Tools, handlers, timers, Slots, styles, and theme overrides must all belong to the current Fiber.\n- Use ctx.effect(), ctx.on(), or official APIs that return a disposer so stop, update, or undefine removes every side effect.\n- The cordis-plugin-development Skill contains complete timer, Waterfall, Slot, theme, Tool, RPC, and React examples and troubleshooting guidance.\n\n## Host and Client\n\n- Host runs in the DSH Node.js process and is appropriate for files, networking, commands, Agent/Session access, Host Events, Services, model Tools, and JSON methods callable by the Client.\n- Client runs in the browser page and is appropriate for themes, layout, current page state, Tool cards, and Slot UI.\n- Host and Client communicate through Package-private JSON methods: Host uses harness.handle(method, handler), and Client uses host.call(method, args). The direction is Client→Host, and only lossless JSON may cross it.\n- Client UI must be registered in a queried Slot; apply() cannot directly return a React Element. Query Slots.listSubTree without root to choose from the compact purpose/topology tree, then query the exact root for its full registration contract and props before writing code.\n- See the Skill and Inspect Providers for Run-specific panels and exact Slot registration patterns.\n\n## Asynchronous results and recovery\n\n- Do not wait inside a Tool for approval or browser work that can happen only after the current turn ends.\n- Asynchronous success, rejection, and runtime errors update Run state and notify you through steering context.\n- After a technical failure, use cordis_inspect_self to read the exact Package source and its message/stack. Define a corrected Package under the same Plugin and retry autonomously.\n- Use the cordis-plugin-development Skill for other failure causes, repair procedures, and complete extension patterns.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.\n\n## Writing code for run_code\n\n`run_code` takes two required arguments: `code` — the body of an async TypeScript function (erasable syntax only — no `enum` or namespaces; type annotations are advisory, the code runs type-stripped) — and `description`, a short summary of what the program does. Inside the program:\n\n- Call tools as `await tools.name(args)` — quoted access for exotic names: `tools[\"my-tool\"](args)`. Every call resolves to the tool's typed canonical JSON value. Tool arguments must be lossless JSON.\n- A FAILED tool call rejects with `ToolCallError`, whose `toolName` identifies the failed tool and whose `message` is human-readable — `try/catch` it to handle and continue.\n- Independent read-only calls MAY overlap under `Promise.all` (safe calls run concurrently; mutating calls run alone, in submission order). Sequence dependent work with `await`.\n- Emit results with `return` and/or `console.log(...)`. ONLY what you print or return comes back to you — intermediate tool results never enter the conversation, so extract just what you need.\n\nThe available tools:\n\n```ts\ntype JsonValue = null | boolean | number | string | JsonValue[] | { [key: string]: JsonValue }\n\ninterface ToolArgsMap {\n  /** Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`. */\n  bash: {\n    /** The bash command to execute. */\n    command: string;\n    /** Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\". */\n    description: string;\n    /** Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry. */\n    timeoutMs?: number;\n    /** Working directory for this command. Defaults to the session workspace; a relative path is resolved against it. */\n    workdir?: string;\n    /** Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs. */\n  cordis_define: {\n    plugin: {\n      kind: \"new\";\n      /** Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix. */\n      idPrefix: string;\n    } | {\n      kind: \"existing\";\n      /** Exact ID of an existing Plugin; the new Package is appended to that instance. */\n      pluginId: string;\n    };\n    /** Short, readable Package name. */\n    name: string;\n    /** One-sentence, user-facing description of the Package purpose. */\n    purpose: string;\n    code: {\n      /** Plain JavaScript function body that returns the Host-half Cordis Plugin. */\n      host?: string;\n      /** Plain JavaScript function body that returns the browser Client-half Cordis Plugin. */\n      client?: string;\n    };\n  } & Record<string, JsonValue>;\n  /** List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call. */\n  cordis_inspect_list: Record<string, JsonValue>;\n  /** Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props. */\n  cordis_inspect_query: {\n    /** Runtime platform that owns the Provider. */\n    platform: \"host\" | \"client\";\n    /** Exact Provider ID returned by cordis_inspect_list. */\n    provider: string;\n    /** Exact method name declared by the Provider manifest. */\n    method: string;\n    /** Optional query input; it must satisfy the method input schema. */\n    input?: JsonValue;\n  } & Record<string, JsonValue>;\n  /** Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers. */\n  cordis_inspect_self: {\n    /** Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin. */\n    pluginId?: string;\n    /** Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned. */\n    packageId?: string;\n  } & Record<string, JsonValue>;\n  /** Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it. */\n  cordis_run: {\n    /** Stable Plugin ID returned by cordis_define. */\n    pluginId: string;\n    /** Exact immutable Package ID to activate under that Plugin. */\n    packageId: string;\n    /** Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package. */\n    mode: \"run\" | \"update\";\n  } & Record<string, JsonValue>;\n  /** Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal. */\n  cordis_stop: {\n    /** Stable dynamic Plugin ID to stop. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead. */\n  cordis_undefine: {\n    /** Stable dynamic Plugin ID to remove permanently. */\n    pluginId: string;\n  } & Record<string, JsonValue>;\n  /** Edit an existing UTF-8 text file by replacing literal text. */\n  edit: {\n    /** Path to edit, resolved by the filesystem backend. */\n    file_path: string;\n    /** Literal text to replace. Must match exactly. */\n    old_string: string;\n    /** Literal replacement text. Use an empty string to delete the match. */\n    new_string: string;\n    /** Replace all matches. Defaults to false; when false, old_string must appear exactly once. */\n    replace_all?: boolean;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op. */\n  interrupt_agent: {\n    /** The agent id of the running agent to interrupt. */\n    agent_id: string;\n  } & Record<string, JsonValue>;\n  /** Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops. */\n  job_kill: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Optional short reason, recorded in the log and forwarded to the job. */\n    reason?: string;\n  } & Record<string, JsonValue>;\n  /** List your background jobs (running and finished) with their ids, kinds, and statuses. */\n  job_list: Record<string, JsonValue>;\n  /** Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap. */\n  job_output: {\n    /** Job id returned by the tool that started the background work. */\n    job_id: string;\n    /** Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive. */\n    wait?: boolean;\n    /** Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum. */\n    timeout_ms?: number;\n  } & Record<string, JsonValue>;\n  /** Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools. */\n  ralph: {\n    /** The immutable completion objective for every fresh Ralph round. */\n    objective: string;\n    /** Optional positive safe-integer round cap, bounded by the deployment ceiling. */\n    maxRounds?: number;\n  } & Record<string, JsonValue>;\n  /** Read a UTF-8 text file and return line-numbered content. */\n  read: {\n    /** Path to read, resolved by the filesystem backend. */\n    file_path: string;\n    /** 1-based first line to return. Defaults to 1. */\n    offset?: number;\n    /** Maximum number of lines to return. Defaults to 2000. */\n    limit?: number;\n  } & Record<string, JsonValue>;\n  /** Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered. */\n  send_message: {\n    /** The subagent id returned when the background subagent was started. */\n    subagent_id: string;\n    /** The message to deliver to the subagent. */\n    message: string;\n  } & Record<string, JsonValue>;\n  /** Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill. */\n  skill: {\n    /** The exact skill name from the available skills list. */\n    name: string;\n  } & Record<string, JsonValue>;\n  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result. */\n  subagent: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */\n    prompt: string;\n    /** Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it. */\n    run_in_background?: boolean;\n  } & Record<string, JsonValue>;\n  /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result. */\n  subagent_fork: {\n    /** A short (3-5 word) description of the delegated task, for display. */\n    description: string;\n    /** The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new. */\n    prompt: string;\n  } & Record<string, JsonValue>;\n  /** Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished). */\n  todo_write: {\n    /** The COMPLETE task list, replacing any previous list. */\n    todos: ({\n      /** What the task is — a short imperative line. */\n      content: string;\n      /** pending (not started) | in_progress (now) | completed (done). */\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n  } & Record<string, JsonValue>;\n  /** Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn. The workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result. Script-body hooks: - `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly. - `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages. - `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`. - `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim. Misused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`. Constraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes. */\n  workflow: {\n    /** The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`). */\n    script: string;\n    /** The workflow identity block (plain JSON — never code). */\n    meta: {\n      /** Short kebab-case workflow name. */\n      name: string;\n      /** One-line description of what the workflow does. */\n      description: string;\n      /** Optional guidance on when this workflow applies. */\n      whenToUse?: string;\n      /** Optional phase declarations matched by phase() calls. */\n      phases?: ({\n        /** The phase title phase() calls match by exact string. */\n        title: string;\n        /** Optional one-line description of the phase. */\n        detail?: string;\n        /** Optional provider override this phase is expected to use. */\n        provider?: string;\n        /** Optional model override this phase is expected to use. */\n        model?: string;\n      } & Record<string, JsonValue>)[];\n    } & Record<string, JsonValue>;\n    /** Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}). */\n    args?: Record<string, JsonValue>;\n  } & Record<string, JsonValue>;\n  /** Create or fully replace a UTF-8 text file. */\n  write: {\n    /** Path to write, resolved by the filesystem backend. */\n    file_path: string;\n    /** Full UTF-8 text content to write. */\n    content: string;\n  } & Record<string, JsonValue>;\n}\n\ninterface ToolOutputMap {\n  bash: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"foreground\";\n    exitCode: number | null;\n    signal: string | null;\n    timedOut: boolean;\n    aborted: boolean;\n    timeoutMs: number;\n    stdout: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    stderr: {\n      text: string;\n      truncated: boolean;\n      spillPath?: string;\n    };\n    sandbox?: {\n      mode: string;\n      denied: boolean;\n      enforcement?: string;\n      runnerFailed?: boolean;\n    };\n  };\n  cordis_define: {\n    pluginId: string;\n    packageId: string;\n    name: string;\n    purpose: string;\n    hasHostHalf: boolean;\n    hasClientHalf: boolean;\n  };\n  cordis_inspect_list: JsonValue;\n  cordis_inspect_query: JsonValue;\n  cordis_inspect_self: JsonValue;\n  cordis_run: JsonValue;\n  cordis_stop: {\n    pluginId: string;\n  };\n  cordis_undefine: {\n    pluginId: string;\n    wasRunning: boolean;\n  };\n  edit: {\n    path: string;\n    before: string;\n    after: string;\n  };\n  interrupt_agent: {\n    accepted: boolean;\n  };\n  job_kill: {\n    outcome: \"cancellation-requested\" | \"already-finished\";\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  job_list: ({\n    id: string;\n    kind: string;\n    label: string;\n    status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n    detail?: string;\n    startedAt: number;\n    finishedAt?: number;\n  })[];\n  job_output: {\n    text: string;\n    job: {\n      id: string;\n      kind: string;\n      label: string;\n      status: \"running\" | \"stopping\" | \"completed\" | \"killed\" | \"failed\";\n      detail?: string;\n      startedAt: number;\n      finishedAt?: number;\n    };\n  };\n  ralph: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  read: {\n    path: string;\n    offset: number;\n    lines: {\n      number: number;\n      text: string;\n    }[];\n    totalLines: number;\n  };\n  send_message: {\n    messageId: string;\n  };\n  skill: {\n    name: string;\n    provider: string;\n    resourceBase?: {\n      kind: \"directory\";\n      path: string;\n    } | {\n      kind: \"url\";\n      url: string;\n    } | {\n      kind: \"opaque\";\n      description: string;\n    };\n    content: string;\n  };\n  subagent: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  subagent_fork: {\n    kind: \"background\";\n    jobId: string;\n  } | {\n    kind: \"continuable\";\n    subagentId: string;\n  } | {\n    kind: \"foreground\";\n    runId: string;\n    output: JsonValue[];\n  };\n  todo_write: {\n    todos: ({\n      content: string;\n      status: \"pending\" | \"in_progress\" | \"completed\";\n    })[];\n    counts: {\n      pending: number;\n      inProgress: number;\n      completed: number;\n    };\n  };\n  workflow: {\n    runId: string;\n    agentsStarted: number;\n    result: JsonValue;\n  };\n  write: {\n    path: string;\n    operation: \"create\" | \"update\";\n    before: string | null;\n    after: string;\n  };\n}\n\ntype ToolName = keyof ToolOutputMap\n\ndeclare class ToolCallError extends Error {\n  readonly name: \"ToolCallError\";\n  readonly toolName: ToolName;\n}\n\ndeclare const tools: {\n  [K in ToolName]: (args: ToolArgsMap[K]) => Promise<ToolOutputMap[K]>;\n}\n```","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"cordis_define","description":"Define an immutable Cordis Package. For a new Plugin, use kind:\"new\" and provide only a semantic prefix of 3–6 lowercase English letters; the Host returns the final pluginId and packageId. To modify an existing Plugin, use kind:\"existing\" with its exact pluginId to append a Package without overwriting older versions. Provide at least one of code.host and code.client. Each value is a plain JavaScript function body that returns a Cordis Plugin; no TypeScript, JSX, or import transformation occurs. Query Inspect before depending on a Service, Event, Builtin, Slot, or token. Define only validates parameters and syntax and records source: it does not request approval, execute apply, or change currentPackageId. On success, call cordis_run with the returned IDs.","parameters":{"type":"object","properties":{"plugin":{"oneOf":[{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"new"},"idPrefix":{"type":"string","description":"Suggested semantic prefix of 3–6 lowercase English letters; the Host adds a unique numeric suffix."}},"required":["kind","idPrefix"]},{"type":"object","additionalProperties":false,"properties":{"kind":{"type":"string","const":"existing"},"pluginId":{"type":"string","description":"Exact ID of an existing Plugin; the new Package is appended to that instance."}},"required":["kind","pluginId"]}]},"name":{"type":"string","description":"Short, readable Package name."},"purpose":{"type":"string","description":"One-sentence, user-facing description of the Package purpose."},"code":{"type":"object","additionalProperties":false,"properties":{"host":{"type":"string","description":"Plain JavaScript function body that returns the Host-half Cordis Plugin."},"client":{"type":"string","description":"Plain JavaScript function body that returns the browser Client-half Cordis Plugin."}}}},"required":["plugin","name","purpose","code"]}},{"name":"cordis_inspect_list","description":"List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before creating or modifying a Package, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call.","parameters":{"type":"object","properties":{}}},{"name":"cordis_inspect_query","description":"Run a read-only query explicitly declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before cordis_define to read exact Service methods, Event modes, Builtin signatures, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response and remains pending until a page answers or the Tool is cancelled. This Tool cannot invoke business Service methods or modify the runtime. For Service.listService and Event.listEvents, query without input to navigate the compact signature directory, then query the exact service or event for its structured contract and referenced types. For Slots.listSubTree, query without root to navigate the compact tree, then query the exact root for its complete registration contract and props.","parameters":{"type":"object","properties":{"platform":{"type":"string","description":"Runtime platform that owns the Provider.","enum":["host","client"]},"provider":{"type":"string","description":"Exact Provider ID returned by cordis_inspect_list."},"method":{"type":"string","description":"Exact method name declared by the Provider manifest."},"input":{"description":"Optional query input; it must satisfy the method input schema."}},"required":["platform","provider","method"]}},{"name":"cordis_inspect_self","description":"Inspect dynamic Cordis objects owned by the current Session at increasing levels of detail. With no IDs, list only Plugin summaries. With pluginId alone, return version pointers, the latest Run, and every Package summary. Only pluginId plus packageId returns that immutable Package's Host/Client source and runtime diagnostics. packageId cannot be supplied alone. Query an exact Package before handling @pluginId, repairing an asynchronous failure, or defining an updated version. This Tool is read-only: it neither executes code nor changes version pointers.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define or injected by @pluginId; omit it to list every current Plugin."},"packageId":{"type":"string","description":"Exact immutable Package ID owned by pluginId; when specified, source and diagnostics are returned."}}}},{"name":"cordis_run","description":"Activate one exact Package of a dynamic Plugin. Use mode:\"run\" for the first activation, restarting currentPackageId, or rollback. When current exists, use mode:\"update\" to switch to a different Package, even if the Plugin is currently stopped. An unauthorized Client Package creates an approval request and returns awaiting-approval; an authorized Package returns starting and continues asynchronously in the browser. Neither result waits for the final outcome inside the Tool. currentPackageId changes only after complete success; on failure, the old current and target next remain. Asynchronous success, rejection, or technical failure is reported through state and steering. After a technical failure, read diagnostics with cordis_inspect_self, correct the same Plugin, and retry autonomously. Do not request approval again after the user rejects it.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable Plugin ID returned by cordis_define."},"packageId":{"type":"string","description":"Exact immutable Package ID to activate under that Plugin."},"mode":{"type":"string","description":"Use run for the first activation, restarting current, or rollback; use update to switch from current to a different Package.","enum":["run","update"]}},"required":["pluginId","packageId","mode"]}},{"name":"cordis_stop","description":"Stop the current Run of a dynamic Plugin and cancel unfinished approval or activation requests. Retain the Plugin, every immutable Package, grants, currentPackageId, and nextPackageId so it can later run or update directly. Stopping an already stopped Plugin succeeds idempotently. Use this Tool to disable effects temporarily; use cordis_undefine for permanent removal.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to stop."}},"required":["pluginId"]}},{"name":"cordis_undefine","description":"Permanently remove a dynamic Plugin owned by the current Session. If it is running or awaiting approval, first stop it and cancel the request, then delete every Package, grant, and version pointer. After this returns, its pluginId, packageIds, @ reference, and Package business views are invalid; historical cards retain only a \"Plugin removed\" record. Do not call this Tool when versions must remain available for restart or rollback; use cordis_stop instead.","parameters":{"type":"object","properties":{"pluginId":{"type":"string","description":"Stable dynamic Plugin ID to remove permanently."}},"required":["pluginId"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"run_code","description":"Execute a TypeScript program against the available tools. Takes two required arguments: `code`, the BODY of an async function (erasable syntax only; top-level `await` and `return` work), and `description`, a short summary of what the program does. Call tools as `await tools.name(args)` per the declarations in the system prompt. Only what you print or return comes back — curate it.","parameters":{"type":"object","properties":{"code":{"type":"string","description":"The program: the body of an async TypeScript function."},"description":{"type":"string","description":"Clear, concise description of what this program does in active voice, 5-10 words (shown in the UI). Examples: \"Count TODO markers across packages\"; \"Read failing test and its fixture\"; \"Rename config key in every cordis.yml\"."}},"required":["code","description"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-define","name":"cordis_define","argumentsDelta":"{\"plugin\":{\"kind\":\"new\",\"idPrefix\":\"snap\"},\"name\":\"Snapshot Marker\",\"purpose\":\"Exercise the dynamic Cordis Package lifecycle in the snapshot.\",\"code\":{\"host\":\"return { apply() {} }\"}}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-define","name":"cordis_define","arguments":"{\"plugin\":{\"kind\":\"new\",\"idPrefix\":\"snap\"},\"name\":\"Snapshot Marker\",\"purpose\":\"Exercise the dynamic Cordis Package lifecycle in the snapshot.\",\"code\":{\"host\":\"return { apply() {} }\"}}"}}}}
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+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-define","name":"cordis_define","arguments":"{\"plugin\":{\"kind\":\"new\",\"idPrefix\":\"snap\"},\"name\":\"Snapshot Marker\",\"purpose\":\"Exercise the dynamic Cordis Package lifecycle in the snapshot.\",\"code\":{\"host\":\"return { apply() {} }\"}}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e0351488-7bca-48d6-b7af-87d533858f47"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[8,9,10,11,12],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"advanced-define","name":"cordis_define","arguments":"{\"plugin\":{\"kind\":\"new\",\"idPrefix\":\"snap\"},\"name\":\"Snapshot Marker\",\"purpose\":\"Exercise the dynamic Cordis Package lifecycle in the snapshot.\",\"code\":{\"host\":\"return { apply() {} }\"}}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"advanced-define"},"content":[{"type":"tool-result","toolCallId":"advanced-define","content":[{"type":"text","text":"Defined snap-1/pkg-1 (Snapshot Marker); it is not running yet. Use cordis_run to activate this Package."}],"isError":false}],"role":"user","id":"9fd9ba62-1b6d-4bb7-98c6-97815e983026"},"meta":{"pluginId":"snap-1","packageId":"pkg-1"}},"sourceEventSeqs":[14],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-code","name":"run_code","argumentsDelta":"{\"code\":\"const run = await tools.cordis_run({ pluginId: 'snap-1', packageId: 'pkg-1', mode: 'run' });\\nconst inspected = await tools.cordis_inspect_self({ pluginId: 'snap-1' });\\nreturn { run, inspected };\",\"description\":\"Run and inspect the dynamic Cordis Package\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\":\"const run = await tools.cordis_run({ pluginId: 'snap-1', packageId: 'pkg-1', mode: 'run' });\\nconst inspected = await tools.cordis_inspect_self({ pluginId: 'snap-1' });\\nreturn { run, inspected };\",\"description\":\"Run and inspect the dynamic Cordis Package\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\":\"const run = await tools.cordis_run({ pluginId: 'snap-1', packageId: 'pkg-1', mode: 'run' });\\nconst inspected = await tools.cordis_inspect_self({ pluginId: 'snap-1' });\\nreturn { run, inspected };\",\"description\":\"Run and inspect the dynamic Cordis Package\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6f6c3cc3-350b-4afb-a3d1-8f91b9494628"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[18,19,20,21,22],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":2,"callId":"advanced-code","name":"run_code","arguments":"{\"code\":\"const run = await tools.cordis_run({ pluginId: 'snap-1', packageId: 'pkg-1', mode: 'run' });\\nconst inspected = await tools.cordis_inspect_self({ pluginId: 'snap-1' });\\nreturn { run, inspected };\",\"description\":\"Run and inspect the dynamic Cordis Package\"}"}}
+{"type":"tool/code-dispatch-start","data":{"rootCallId":"advanced-code","parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_run","arguments":{"pluginId":"snap-1","packageId":"pkg-1","mode":"run"}}}
+{"type":"tool/code-dispatch","data":{"rootCallId":"advanced-code","parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_run","arguments":{"pluginId":"snap-1","packageId":"pkg-1","mode":"run"},"isError":false,"content":[{"type":"text","text":"snap-1/pkg-1 is running (run-1)."}]}}
+{"type":"tool/code-dispatch-start","data":{"rootCallId":"advanced-code","parentCallId":"advanced-code","subCallId":"advanced-code:code:2","name":"cordis_inspect_self","arguments":{"pluginId":"snap-1"}}}
+{"type":"tool/code-dispatch","data":{"rootCallId":"advanced-code","parentCallId":"advanced-code","subCallId":"advanced-code:code:2","name":"cordis_inspect_self","arguments":{"pluginId":"snap-1"},"isError":false,"content":[{"type":"text","text":"{\n  \"mode\": \"plugin\",\n  \"pluginId\": \"snap-1\",\n  \"name\": \"Snapshot Marker\",\n  \"packageCount\": 1,\n  \"state\": \"running\",\n  \"currentPackageId\": \"pkg-1\",\n  \"activeRun\": {\n    \"pluginRunId\": \"run-1\",\n    \"packageId\": \"pkg-1\"\n  },\n  \"packages\": [\n    {\n      \"packageId\": \"pkg-1\",\n      \"name\": \"Snapshot Marker\",\n      \"purpose\": \"Exercise the dynamic Cordis Package lifecycle in the snapshot.\",\n      \"hasHostHalf\": true,\n      \"hasClientHalf\": false,\n      \"isCurrent\": true,\n      \"isNext\": false\n    }\n  ]\n}"}]}}
+{"type":"tool/result","data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"advanced-code"},"content":[{"type":"tool-result","toolCallId":"advanced-code","content":[{"type":"text","text":"{\n  \"run\": {\n    \"status\": \"running\",\n    \"pluginId\": \"snap-1\",\n    \"packageId\": \"pkg-1\",\n    \"pluginRunId\": \"run-1\",\n    \"currentPackageId\": \"pkg-1\",\n    \"host\": {\n      \"status\": \"running\",\n      \"provides\": [],\n      \"waitingFor\": []\n    },\n    \"client\": {\n      \"status\": \"absent\",\n      \"waitingFor\": []\n    }\n  },\n  \"inspected\": {\n    \"mode\": \"plugin\",\n    \"pluginId\": \"snap-1\",\n    \"name\": \"Snapshot Marker\",\n    \"packageCount\": 1,\n    \"state\": \"running\",\n    \"currentPackageId\": \"pkg-1\",\n    \"activeRun\": {\n      \"pluginRunId\": \"run-1\",\n      \"packageId\": \"pkg-1\"\n    },\n    \"packages\": [\n      {\n        \"packageId\": \"pkg-1\",\n        \"name\": \"Snapshot Marker\",\n        \"purpose\": \"Exercise the dynamic Cordis Package lifecycle in the snapshot.\",\n        \"hasHostHalf\": true,\n        \"hasClientHalf\": false,\n        \"isCurrent\": true,\n        \"isNext\": false\n      }\n    ]\n  }\n}"}],"isError":false}],"role":"user","id":"40a17cbf-a853-4813-bbb5-7970cfbc7010"}},"sourceEventSeqs":[24],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"step/start","data":{"turn":1,"step":3}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-direct-child","name":"subagent","argumentsDelta":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\",\"run_in_background\":false}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\",\"run_in_background\":false}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\",\"run_in_background\":false}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"8bdea090-4a9a-451f-bb21-459af50472fa"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[32,33,34,35,36],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":3,"callId":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\",\"run_in_background\":false}"}}
+{"type":"tool/result","data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"advanced-direct-child"},"content":[{"type":"tool-result","toolCallId":"advanced-direct-child","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"isError":false}],"role":"user","id":"c978c208-8ebd-4dd6-b997-606ca7de787e"}},"sourceEventSeqs":[38],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":3}}
+{"type":"step/start","data":{"turn":1,"step":4}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-workflow","name":"workflow","argumentsDelta":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"e55b2b2e-497c-45d2-8115-16f317ae573f"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[42,43,44,45,46],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":4,"callId":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}}
+{"type":"tool-workflow/run-start","data":{"runId":"cd3d2666-94a1-4285-804e-c99630bc7b51","name":"advanced-headless-snapshot"}}
+{"type":"tool-workflow/agent-start","data":{"runId":"cd3d2666-94a1-4285-804e-c99630bc7b51","seq":1,"label":"workflow-child","phase":"Delegate","childId":"33333333-3333-4333-8333-333333333333"}}
+{"type":"tool-workflow/agent-end","data":{"runId":"cd3d2666-94a1-4285-804e-c99630bc7b51","seq":1,"outcome":"completed"}}
+{"type":"tool-workflow/run-end","data":{"runId":"cd3d2666-94a1-4285-804e-c99630bc7b51","stopReason":"completed"}}
+{"type":"tool/result","data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"advanced-workflow"},"content":[{"type":"tool-result","toolCallId":"advanced-workflow","content":[{"type":"text","text":"workflow \"advanced-headless-snapshot\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WORKFLOW_CHILD_OK\"\n}"}],"isError":false}],"role":"user","id":"f85f58fc-8d7e-4c9f-a0fe-caff480a9fec"}},"sourceEventSeqs":[48],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":4}}
+{"type":"step/start","data":{"turn":1,"step":5}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-undefine","name":"cordis_undefine","argumentsDelta":"{\"pluginId\":\"snap-1\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-undefine","name":"cordis_undefine","arguments":"{\"pluginId\":\"snap-1\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-undefine","name":"cordis_undefine","arguments":"{\"pluginId\":\"snap-1\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"68bd993f-a0bd-4ea8-ad16-6b1a19e09bd3"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[56,57,58,59,60],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":5,"callId":"advanced-undefine","name":"cordis_undefine","arguments":"{\"pluginId\":\"snap-1\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"advanced-undefine"},"content":[{"type":"tool-result","toolCallId":"advanced-undefine","content":[{"type":"text","text":"Removed dynamic Plugin snap-1 and all of its Packages."}],"isError":false}],"role":"user","id":"2d90e3b5-2a4c-4408-a1a0-3d009786a07b"}},"sourceEventSeqs":[62],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":5}}
+{"type":"step/start","data":{"turn":1,"step":6}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"text-delta","index":0,"text":"ADVANCED_HEADLESS_OK"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"ADVANCED_HEADLESS_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"ADVANCED_HEADLESS_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f3823367-2e25-43d2-a129-70dc492b2a90"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[66,67,68,69,70],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":6}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/compaction-recovery/session.jsonl b/examples/headless-agent/tests/snapshots/compaction-recovery/session.jsonl
index 22afadca55..575bbc5dfa 100644
--- a/examples/headless-agent/tests/snapshots/compaction-recovery/session.jsonl
+++ b/examples/headless-agent/tests/snapshots/compaction-recovery/session.jsonl
@@ -1,32 +1,32 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1786123401613,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Establish a durable compaction premise before continuing. Record every part of this historical evidence: the snapshot uses keyless replay; persistence uses JSONL; the assembled headless application loads its real Cordis composition; model-visible inputs remain logged; tool calls and results remain paired and ordered; context overflow retains the original failure while recovery is attempted; compaction opens with compaction/start and closes with compaction/end; a successful auxiliary summary records compaction/summary provenance; the replacement surface shadows only an older balanced range; the checkpoint remains smaller than the history it replaces; the newest tool result remains verbatim; the retried request sees that checkpoint; the final response proves the same turn continued; deterministic snapshot evidence stays separate from the live-provider smoke; and no external API key is needed. Emit one alpha marker through bash, then finish the task after any required recovery with the exact words COMPACTION RECOVERED."}],"source":{"kind":"user"},"role":"user","id":"10eb2388-2d40-4564-af27-e7a5419fc14e"}]}}
-{"type":"turn/start","seq":1,"time":1786123401614,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1786123401614,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1786123401667,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1786123401667,"data":{"content":[{"type":"text","text":"Establish a durable compaction premise before continuing. Record every part of this historical evidence: the snapshot uses keyless replay; persistence uses JSONL; the assembled headless application loads its real Cordis composition; model-visible inputs remain logged; tool calls and results remain paired and ordered; context overflow retains the original failure while recovery is attempted; compaction opens with compaction/start and closes with compaction/end; a successful auxiliary summary records compaction/summary provenance; the replacement surface shadows only an older balanced range; the checkpoint remains smaller than the history it replaces; the newest tool result remains verbatim; the retried request sees that checkpoint; the final response proves the same turn continued; deterministic snapshot evidence stays separate from the live-provider smoke; and no external API key is needed. Emit one alpha marker through bash, then finish the task after any required recovery with the exact words COMPACTION RECOVERED."}],"source":{"kind":"user"},"role":"user","id":"10eb2388-2d40-4564-af27-e7a5419fc14e"},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1786123401667,"data":{"title":"Establish a durable compaction premise","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":6,"time":1786123401668,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model.\n\nVerify your work by running the code or tests. Keep answers brief and\nfactual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
-{"type":"request/context","seq":7,"time":1786123401669,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash","contextWindow":128000}}
-{"type":"assistant/chunk","seq":8,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_compaction_marker","name":"bash","argumentsDelta":"{\"command\":\"printf 'alpha\\n'\",\"description\":\"Emit compaction premise marker\"}"}}}
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-{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":13,"time":1786123401680,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_compaction_marker","name":"bash","arguments":"{\"command\":\"printf 'alpha\\n'\",\"description\":\"Emit compaction premise marker\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a71b2cfd-c18f-4a1b-82f6-e89fb371a87e"},"usage":{"inputTokens":24,"outputTokens":6}},"sourceEventSeqs":[8,9,10,11,12],"surfaceOp":"append"}
-{"type":"tool/call","seq":14,"time":1786123401680,"data":{"turn":1,"step":1,"callId":"call_compaction_marker","name":"bash","arguments":"{\"command\":\"printf 'alpha\\n'\",\"description\":\"Emit compaction premise marker\"}"}}
-{"type":"tool/result","seq":15,"time":1786123401700,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_compaction_marker"},"content":[{"type":"tool-result","toolCallId":"call_compaction_marker","content":[{"type":"text","text":"alpha\n"}],"isError":false}],"role":"user","id":"c9e68608-2dff-44bc-a344-b01006272378"}},"sourceEventSeqs":[14],"surfaceOp":"append"}
-{"type":"step/end","seq":16,"time":1786123401700,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":17,"time":1786123401710,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":18,"time":1786123401715,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"error","failure":{"message":"snapshot request exceeded the model context window","code":"CONTEXT_WINDOW_EXCEEDED"}}}}}
-{"type":"compaction/start","seq":19,"time":1786123401715,"data":{"compactionId":"338e88fa-e78b-4d49-bd38-8f919e85f5e1","turn":1}}
-{"type":"compaction/summary","seq":20,"time":1786123401725,"data":{"compactionId":"338e88fa-e78b-4d49-bd38-8f919e85f5e1","summary":[{"type":"text","text":"The request established a durable compaction premise."}],"rawOutput":[{"type":"text","text":"The request established a durable compaction premise."}],"llmStreamCall":true,"shadowedRange":{"start":4,"end":4},"shadowedSeqs":[4],"shadowedTokenCount":266,"provider":"deepseek-official","model":"deepseek-v4-flash","maxTokens":32,"usage":{"inputTokens":20,"outputTokens":4}}}
-{"type":"user/message","seq":21,"time":1786123401725,"data":{"content":[{"type":"text","text":"This is an automatically generated checkpoint condensing an earlier span of the conversation to free up context. Treat the captured context as established background and build on it without restating it. Continue the task directly from the messages that follow, without acknowledging this checkpoint.\n\n<compacted-summary>"},{"type":"text","text":"The request established a durable compaction premise."},{"type":"text","text":"</compacted-summary>"}],"source":{"kind":"plugin","plugin":"compact","compactionId":"338e88fa-e78b-4d49-bd38-8f919e85f5e1"},"role":"user","id":"3668b957-07a2-4cb7-96b1-98a23ac8cdb8"},"sourceEventSeqs":[19,20,4],"surfaceOp":{"op":"replace","start":4,"end":4}}
-{"type":"compaction/end","seq":22,"time":1786123401725,"data":{"compactionId":"338e88fa-e78b-4d49-bd38-8f919e85f5e1","turn":1}}
-{"type":"assistant/chunk","seq":23,"time":1786123401730,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":24,"time":1786123401730,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"COMPACTION RECOVERED"}}}
-{"type":"assistant/chunk","seq":25,"time":1786123401730,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"COMPACTION RECOVERED"}}}}
-{"type":"assistant/chunk","seq":26,"time":1786123401730,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":4}}}}
-{"type":"assistant/chunk","seq":27,"time":1786123401730,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":28,"time":1786123401730,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"COMPACTION RECOVERED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bcbfd4ff-60e5-4634-ae39-4de3708a8abc"},"usage":{"inputTokens":20,"outputTokens":4}},"sourceEventSeqs":[23,24,25,26,27],"surfaceOp":"append"}
-{"type":"step/end","seq":29,"time":1786123401730,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":30,"time":1786123401730,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Establish a durable compaction premise before continuing. Record every part of this historical evidence: the snapshot uses keyless replay; persistence uses JSONL; the assembled headless application loads its real Cordis composition; model-visible inputs remain logged; tool calls and results remain paired and ordered; context overflow retains the original failure while recovery is attempted; compaction opens with compaction/start and closes with compaction/end; a successful auxiliary summary records compaction/summary provenance; the replacement surface shadows only an older balanced range; the checkpoint remains smaller than the history it replaces; the newest tool result remains verbatim; the retried request sees that checkpoint; the final response proves the same turn continued; deterministic snapshot evidence stays separate from the live-provider smoke; and no external API key is needed. Emit one alpha marker through bash, then finish the task after any required recovery with the exact words COMPACTION RECOVERED."}],"source":{"kind":"user"},"role":"user","id":"10eb2388-2d40-4564-af27-e7a5419fc14e"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Establish a durable compaction premise before continuing. Record every part of this historical evidence: the snapshot uses keyless replay; persistence uses JSONL; the assembled headless application loads its real Cordis composition; model-visible inputs remain logged; tool calls and results remain paired and ordered; context overflow retains the original failure while recovery is attempted; compaction opens with compaction/start and closes with compaction/end; a successful auxiliary summary records compaction/summary provenance; the replacement surface shadows only an older balanced range; the checkpoint remains smaller than the history it replaces; the newest tool result remains verbatim; the retried request sees that checkpoint; the final response proves the same turn continued; deterministic snapshot evidence stays separate from the live-provider smoke; and no external API key is needed. Emit one alpha marker through bash, then finish the task after any required recovery with the exact words COMPACTION RECOVERED."}],"source":{"kind":"user"},"role":"user","id":"10eb2388-2d40-4564-af27-e7a5419fc14e"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Establish a durable compaction premise","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model.\n\nVerify your work by running the code or tests. Keep answers brief and\nfactual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash","contextWindow":128000}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_compaction_marker","name":"bash","argumentsDelta":"{\"command\":\"printf 'alpha\\n'\",\"description\":\"Emit compaction premise marker\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_compaction_marker","name":"bash","arguments":"{\"command\":\"printf 'alpha\\n'\",\"description\":\"Emit compaction premise marker\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":24,"outputTokens":6}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_compaction_marker","name":"bash","arguments":"{\"command\":\"printf 'alpha\\n'\",\"description\":\"Emit compaction premise marker\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"a71b2cfd-c18f-4a1b-82f6-e89fb371a87e"},"usage":{"inputTokens":24,"outputTokens":6}},"sourceEventSeqs":[8,9,10,11,12],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"call_compaction_marker","name":"bash","arguments":"{\"command\":\"printf 'alpha\\n'\",\"description\":\"Emit compaction premise marker\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_compaction_marker"},"content":[{"type":"tool-result","toolCallId":"call_compaction_marker","content":[{"type":"text","text":"alpha\n"}],"isError":false}],"role":"user","id":"c9e68608-2dff-44bc-a344-b01006272378"}},"sourceEventSeqs":[14],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"error","failure":{"message":"snapshot request exceeded the model context window","code":"CONTEXT_WINDOW_EXCEEDED"}}}}}
+{"type":"compaction/start","data":{"compactionId":"338e88fa-e78b-4d49-bd38-8f919e85f5e1","turn":1}}
+{"type":"compaction/summary","data":{"compactionId":"338e88fa-e78b-4d49-bd38-8f919e85f5e1","summary":[{"type":"text","text":"The request established a durable compaction premise."}],"rawOutput":[{"type":"text","text":"The request established a durable compaction premise."}],"llmStreamCall":true,"shadowedRange":{"start":4,"end":4},"shadowedSeqs":[4],"shadowedTokenCount":266,"provider":"deepseek-official","model":"deepseek-v4-flash","maxTokens":32,"usage":{"inputTokens":20,"outputTokens":4}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"This is an automatically generated checkpoint condensing an earlier span of the conversation to free up context. Treat the captured context as established background and build on it without restating it. Continue the task directly from the messages that follow, without acknowledging this checkpoint.\n\n<compacted-summary>"},{"type":"text","text":"The request established a durable compaction premise."},{"type":"text","text":"</compacted-summary>"}],"source":{"kind":"plugin","plugin":"compact","compactionId":"338e88fa-e78b-4d49-bd38-8f919e85f5e1"},"role":"user","id":"3668b957-07a2-4cb7-96b1-98a23ac8cdb8"},"sourceEventSeqs":[19,20,4],"surfaceOp":{"op":"replace","start":4,"end":4}}
+{"type":"compaction/end","data":{"compactionId":"338e88fa-e78b-4d49-bd38-8f919e85f5e1","turn":1}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"COMPACTION RECOVERED"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"COMPACTION RECOVERED"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":4}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"COMPACTION RECOVERED"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"bcbfd4ff-60e5-4634-ae39-4de3708a8abc"},"usage":{"inputTokens":20,"outputTokens":4}},"sourceEventSeqs":[23,24,25,26,27],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/headless-profile/session.expected.jsonl b/examples/headless-agent/tests/snapshots/headless-profile/session.expected.jsonl
index f90f798456..426526fd79 100644
--- a/examples/headless-agent/tests/snapshots/headless-profile/session.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/headless-profile/session.expected.jsonl
@@ -1,33 +1,33 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"permission/preset","seq":0,"time":0,"data":{"preset":"danger-full-access"}}
-{"type":"sandbox/mode","seq":1,"time":0,"data":{"mode":"danger-full-access"}}
-{"type":"approval/policy","seq":2,"time":0,"data":{"policy":"never"}}
-{"type":"agent/inbox/spliced","seq":3,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Prove the product headless profile path with one real tool round trip."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":4,"time":0,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":5,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":6,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":7,"time":0,"data":{"content":[{"type":"text","text":"Prove the product headless profile path with one real tool round trip."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":8,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":9,"time":0,"data":{"title":"Prove the product headless profile","messageSeqs":[7],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":10,"time":0,"data":{"header":{"config":{"provider":"cli-mock","model":"cli-mock","reasoningEffort":"high"},"adapterDefaults":{"reasoningEffort":true},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":11,"time":0,"data":{"provider":"cli-mock","model":"cli-mock"}}
-{"type":"session/title-llm-request","seq":12,"time":0,"data":{"titleProvider":"session-title-first-prompt-llm","messageSeqs":[7],"route":{"provider":"cli-mock","model":"cli-mock"},"system":"Create a concise title for an AI coding-assistant session from the supplied human messages.\nReturn only the title on one line, **in plain text of natural language**, with no quotes, prefix, explanation, Markdown, XML, or terminal control codes. No code is allowed.\nUse the language of the messages.\nAim for about 5 words in non-CJK languages or 10 CJK characters.","messages":[{"content":[{"type":"text","text":"Generate the session title from this JSON array of human messages:\n[{\"seq\":7,\"text\":\"Prove the product headless profile path with one real tool round trip.\"}]"}],"source":{"kind":"plugin","plugin":"dsh-session-title-llm"},"role":"user","id":"{{sessionId}}"}],"maxTokens":64}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"cli-smoke-call","name":"bash","argumentsDelta":"{\"command\":\"printf CLI_TOOL_ROUND_TRIP\",\"description\":\"Prove the CLI tool round trip.\"}"}}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"cli-smoke-call","name":"bash","arguments":"{\"command\":\"printf CLI_TOOL_ROUND_TRIP\",\"description\":\"Prove the CLI tool round trip.\"}"}}}}
-{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":11,"outputTokens":3,"cacheReadTokens":2}}}}
-{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":18,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"cli-smoke-call","name":"bash","arguments":"{\"command\":\"printf CLI_TOOL_ROUND_TRIP\",\"description\":\"Prove the CLI tool round trip.\"}"}],"source":{"kind":"model","provider":"cli-mock","model":"cli-mock"},"id":"{{sessionId}}"},"usage":{"inputTokens":11,"outputTokens":3,"cacheReadTokens":2}},"sourceEventSeqs":[13,14,15,16,17],"surfaceOp":"append"}
-{"type":"tool/call","seq":19,"time":0,"data":{"turn":1,"step":1,"callId":"cli-smoke-call","name":"bash","arguments":"{\"command\":\"printf CLI_TOOL_ROUND_TRIP\",\"description\":\"Prove the CLI tool round trip.\"}"}}
-{"type":"tool/result","seq":20,"time":0,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"cli-smoke-call"},"content":[{"type":"tool-result","toolCallId":"cli-smoke-call","content":[{"type":"text","text":"CLI_TOOL_ROUND_TRIP"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[19],"surfaceOp":"append"}
-{"type":"step/end","seq":21,"time":0,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":22,"time":0,"data":{"turn":1,"step":2}}
-{"type":"request/header","seq":23,"time":0,"data":{"header":{"config":{"provider":"cli-mock","model":"cli-mock","reasoningEffort":"off"},"system":"{{system}}","tools":"{{tools}}"},"reason":"change"}}
-{"type":"assistant/chunk","seq":24,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":25,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"CLI tool round trip complete: CLI_TOOL_ROUND_TRIP"}}}
-{"type":"assistant/chunk","seq":26,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CLI tool round trip complete: CLI_TOOL_ROUND_TRIP"}}}}
-{"type":"assistant/chunk","seq":27,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":7,"outputTokens":5,"reasoningTokens":1}}}}
-{"type":"assistant/chunk","seq":28,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":29,"time":0,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"CLI tool round trip complete: CLI_TOOL_ROUND_TRIP"}],"source":{"kind":"model","provider":"cli-mock","model":"cli-mock"},"id":"{{sessionId}}"},"usage":{"inputTokens":7,"outputTokens":5,"reasoningTokens":1}},"sourceEventSeqs":[24,25,26,27,28],"surfaceOp":"append"}
-{"type":"step/end","seq":30,"time":0,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":31,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"permission/preset","data":{"preset":"danger-full-access"}}
+{"type":"sandbox/mode","data":{"mode":"danger-full-access"}}
+{"type":"approval/policy","data":{"policy":"never"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Prove the product headless profile path with one real tool round trip."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Prove the product headless profile path with one real tool round trip."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."},{"name":"approval:policy","text":"Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Prove the product headless profile","messageSeqs":[7],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"cli-mock","model":"cli-mock","reasoningEffort":"high"},"adapterDefaults":{"reasoningEffort":true},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"cli-mock","model":"cli-mock"}}
+{"type":"session/title-llm-request","data":{"titleProvider":"session-title-first-prompt-llm","messageSeqs":[7],"route":{"provider":"cli-mock","model":"cli-mock"},"system":"Create a concise title for an AI coding-assistant session from the supplied human messages.\nReturn only the title on one line, **in plain text of natural language**, with no quotes, prefix, explanation, Markdown, XML, or terminal control codes. No code is allowed.\nUse the language of the messages.\nAim for about 5 words in non-CJK languages or 10 CJK characters.","messages":[{"content":[{"type":"text","text":"Generate the session title from this JSON array of human messages:\n[{\"seq\":7,\"text\":\"Prove the product headless profile path with one real tool round trip.\"}]"}],"source":{"kind":"plugin","plugin":"dsh-session-title-llm"},"role":"user","id":"{{sessionId}}"}],"maxTokens":64}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"cli-smoke-call","name":"bash","argumentsDelta":"{\"command\":\"printf CLI_TOOL_ROUND_TRIP\",\"description\":\"Prove the CLI tool round trip.\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"cli-smoke-call","name":"bash","arguments":"{\"command\":\"printf CLI_TOOL_ROUND_TRIP\",\"description\":\"Prove the CLI tool round trip.\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":11,"outputTokens":3,"cacheReadTokens":2}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"cli-smoke-call","name":"bash","arguments":"{\"command\":\"printf CLI_TOOL_ROUND_TRIP\",\"description\":\"Prove the CLI tool round trip.\"}"}],"source":{"kind":"model","provider":"cli-mock","model":"cli-mock"},"id":"{{sessionId}}"},"usage":{"inputTokens":11,"outputTokens":3,"cacheReadTokens":2}},"sourceEventSeqs":[13,14,15,16,17],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"cli-smoke-call","name":"bash","arguments":"{\"command\":\"printf CLI_TOOL_ROUND_TRIP\",\"description\":\"Prove the CLI tool round trip.\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"cli-smoke-call"},"content":[{"type":"tool-result","toolCallId":"cli-smoke-call","content":[{"type":"text","text":"CLI_TOOL_ROUND_TRIP"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[19],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"request/header","data":{"header":{"config":{"provider":"cli-mock","model":"cli-mock","reasoningEffort":"off"},"system":"{{system}}","tools":"{{tools}}"},"reason":"change"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"CLI tool round trip complete: CLI_TOOL_ROUND_TRIP"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CLI tool round trip complete: CLI_TOOL_ROUND_TRIP"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":7,"outputTokens":5,"reasoningTokens":1}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"CLI tool round trip complete: CLI_TOOL_ROUND_TRIP"}],"source":{"kind":"model","provider":"cli-mock","model":"cli-mock"},"id":"{{sessionId}}"},"usage":{"inputTokens":7,"outputTokens":5,"reasoningTokens":1}},"sourceEventSeqs":[24,25,26,27,28],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl b/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
index 6542087adc..6e5148b4de 100644
--- a/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
+++ b/examples/headless-agent/tests/snapshots/pty-tools/session.jsonl
@@ -1,78 +1,78 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498587408,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"d35cdacd-b5e6-4968-b7a3-5ec48f403ef7"}]}}
-{"type":"turn/start","seq":1,"time":1785821457966,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821457966,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498587436,"data":{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"},"role":"user","id":"d35cdacd-b5e6-4968-b7a3-5ec48f403ef7"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730504659,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations."}]},"role":"user","id":"053af702-9950-4860-913a-3c7e45a54f9d"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1785730504659,"data":{"title":"Exercise the six PTY tools","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1785498587438,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"You are an AI agent powered by DeepSeek Harness.\n\nYou are headless-agent, a coding assistant powered by the deepseek-v4-flash model.\n\nVerify your work by running the code or tests. Keep answers brief and\nfactual.\n\n\nUse the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.\n\nUse the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-observation-policy requires it) and prefer edit for targeted changes.\n\nUse the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-observation-policy requires it), unless you just created or edited it in this session.\n\nCheck the [exit code: N] marker on every bash result; investigate failures before moving on.\n\nUse a terminal session only when work needs persistent terminal state or interactive stdin; prefer shell/read/write/edit for bounded one-shot operations. Track every terminal session id and close sessions that no longer matter. An inferred_idle or timeout result does not prove the foreground command exited.\n\nTrack every background job id you start. You are notified in-session when a job finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running job's work. Before giving a final answer, collect every still-relevant job with job_output (set wait: true only when you are genuinely blocked on it), and job_kill jobs that stopped mattering.\n\nUse the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.\n\nUse the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.\n\nUse subagent in the background by default. Start independent delegations together in one assistant message and continue useful work while they run. Set `run_in_background: false` only when your next action depends on that subagent's result. When a background run settles, the runtime sends you a notice containing its outcome and any final assistant message.","tools":[{"name":"bash","description":"Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a job id immediately; read its output with `job_output` and stop it with `job_kill`.","parameters":{"type":"object","properties":{"command":{"type":"string","description":"The bash command to execute."},"description":{"type":"string","description":"Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."},"timeoutMs":{"type":"number","description":"Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."},"workdir":{"type":"string","description":"Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."},"run_in_background":{"type":"boolean","description":"Run in the background and return a job id immediately (collect with job_output, stop with job_kill). No timeout applies."}},"required":["command","description"]}},{"name":"edit","description":"Edit an existing UTF-8 text file by replacing literal text.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to edit, resolved by the filesystem backend."},"old_string":{"type":"string","description":"Literal text to replace. Must match exactly."},"new_string":{"type":"string","description":"Literal replacement text. Use an empty string to delete the match."},"replace_all":{"type":"boolean","description":"Replace all matches. Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"terminal_close","description":"Close one persistent terminal and wait until its captured owned process tree is gone.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."}},"required":["sessionId"]}},{"name":"terminal_list","description":"List persistent terminal sessions owned by the current agent.","parameters":{"type":"object","properties":{}}},{"name":"terminal_open","description":"Create a persistent, owner-isolated terminal session from a registered backend type. Use this for shell or REPL state that must survive across tool calls.","parameters":{"type":"object","properties":{"type":{"type":"string","description":"Registered terminal backend type, usually \"shell\"."},"name":{"type":"string","description":"Optional owner-local display name such as \"main\" or \"gdb\"."},"cwd":{"type":"string","description":"Initial working directory. Defaults to the deployment workspace root."}},"required":["type"]}},{"name":"terminal_read","description":"Read a bounded page of retained output from a persistent terminal without sending input.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."},"offset":{"type":"number","description":"Newest-relative line offset (default 0)."},"count":{"type":"number","description":"Requested line count (default 500; backend caps apply)."}},"required":["sessionId"]}},{"name":"terminal_send","description":"Send text to a persistent terminal. By default Enter is submitted and the call waits for a prompt, stdin wait, output silence, timeout, or session exit. Background mode returns a job id for job_output/job_kill.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id returned by terminal_open or terminal_list."},"text":{"type":"string","description":"UTF-8 text to write to the terminal."},"submit":{"type":"boolean","description":"Submit Enter after text (default true). Set false for control characters or incomplete REPL input."},"run_in_background":{"type":"boolean","description":"Return a job id immediately; collect with job_output or stop with job_kill."}},"required":["sessionId","text"]}},{"name":"terminal_signal","description":"Send an allowed signal to the current foreground process group of a persistent terminal.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."},"signal":{"type":"string","description":"Signal to deliver. Shell-targeted SIGKILL is rejected; use terminal_close.","enum":["SIGINT","SIGTERM","SIGKILL","SIGTSTP","SIGHUP"]}},"required":["sessionId","signal"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. 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Defaults to false; when false, old_string must appear exactly once."}},"required":["file_path","old_string","new_string"]}},{"name":"interrupt_agent","description":"Request cancellation of a background agent's current turn by its agent id. The target may be your direct child or a deeper agent created under you. Only the current turn stops: messages already queued for the agent stay parked until a later send_message, agents it started keep running, and the agent itself stays available for follow-ups. This call returns as soon as the stop request is accepted, so the target may keep running briefly; interrupting an agent that already finished is an accepted no-op.","parameters":{"type":"object","properties":{"agent_id":{"type":"string","description":"The agent id of the running agent to interrupt."}},"required":["agent_id"]}},{"name":"job_kill","description":"Request cancellation of a running background job by job id. Returns immediately; the job settles as killed once its work actually stops.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"reason":{"type":"string","description":"Optional short reason, recorded in the log and forwarded to the job."}},"required":["job_id"]}},{"name":"job_list","description":"List your background jobs (running and finished) with their ids, kinds, and statuses.","parameters":{"type":"object","properties":{}}},{"name":"job_output","description":"Read a background job. Stream jobs return only output since the previous read; final-output jobs return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.","parameters":{"type":"object","properties":{"job_id":{"type":"string","description":"Job id returned by the tool that started the background work."},"wait":{"type":"boolean","description":"Block until the job reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the job alive."},"timeout_ms":{"type":"number","description":"Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."}},"required":["job_id"]}},{"name":"ralph","description":"Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.","parameters":{"type":"object","properties":{"objective":{"type":"string","description":"The immutable completion objective for every fresh Ralph round."},"maxRounds":{"type":"number","description":"Optional positive safe-integer round cap, bounded by the deployment ceiling."}},"required":["objective"]}},{"name":"read","description":"Read a UTF-8 text file and return line-numbered content.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to read, resolved by the filesystem backend."},"offset":{"type":"number","description":"1-based first line to return. Defaults to 1."},"limit":{"type":"number","description":"Maximum number of lines to return. Defaults to 2000."}},"required":["file_path"]}},{"name":"send_message","description":"Send a message to a background subagent by its subagent id, continuing the same conversation. It becomes the subagent's next turn: if it is still working, the message waits until its current turn finishes, so it cannot redirect work already underway. This call returns no answer from the subagent — only confirmation that the message was delivered — so use it to give it more work. A failure means the message was NOT delivered.","parameters":{"type":"object","properties":{"subagent_id":{"type":"string","description":"The subagent id returned when the background subagent was started."},"message":{"type":"string","description":"The message to deliver to the subagent."}},"required":["subagent_id","message"]}},{"name":"skill","description":"Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.","parameters":{"type":"object","properties":{"name":{"type":"string","description":"The exact skill name from the available skills list."}},"required":["name"]}},{"name":"subagent","description":"Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. This tool runs in the background by default, immediately returns a durable subagent id, and keeps the child conversation available for later turns. When that run settles, the runtime sends the parent a notice containing its outcome and any final assistant message; `send_message` starts a later turn in the same child conversation. Set `run_in_background: false` only when your next action depends on receiving the result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."},"run_in_background":{"type":"boolean","description":"Whether to run in the background and return a durable subagent id immediately. Defaults to true. Set false to wait for the result when your next action depends on it."}},"required":["description","prompt"]}},{"name":"subagent_fork","description":"Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This call waits for the subagent and returns its result.","parameters":{"type":"object","properties":{"description":{"type":"string","description":"A short (3-5 word) description of the delegated task, for display."},"prompt":{"type":"string","description":"The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."}},"required":["description","prompt"]}},{"name":"terminal_close","description":"Close one persistent terminal and wait until its captured owned process tree is gone.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."}},"required":["sessionId"]}},{"name":"terminal_list","description":"List persistent terminal sessions owned by the current agent.","parameters":{"type":"object","properties":{}}},{"name":"terminal_open","description":"Create a persistent, owner-isolated terminal session from a registered backend type. Use this for shell or REPL state that must survive across tool calls.","parameters":{"type":"object","properties":{"type":{"type":"string","description":"Registered terminal backend type, usually \"shell\"."},"name":{"type":"string","description":"Optional owner-local display name such as \"main\" or \"gdb\"."},"cwd":{"type":"string","description":"Initial working directory. Defaults to the deployment workspace root."}},"required":["type"]}},{"name":"terminal_read","description":"Read a bounded page of retained output from a persistent terminal without sending input.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."},"offset":{"type":"number","description":"Newest-relative line offset (default 0)."},"count":{"type":"number","description":"Requested line count (default 500; backend caps apply)."}},"required":["sessionId"]}},{"name":"terminal_send","description":"Send text to a persistent terminal. By default Enter is submitted and the call waits for a prompt, stdin wait, output silence, timeout, or session exit. Background mode returns a job id for job_output/job_kill.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id returned by terminal_open or terminal_list."},"text":{"type":"string","description":"UTF-8 text to write to the terminal."},"submit":{"type":"boolean","description":"Submit Enter after text (default true). Set false for control characters or incomplete REPL input."},"run_in_background":{"type":"boolean","description":"Return a job id immediately; collect with job_output or stop with job_kill."}},"required":["sessionId","text"]}},{"name":"terminal_signal","description":"Send an allowed signal to the current foreground process group of a persistent terminal.","parameters":{"type":"object","properties":{"sessionId":{"type":"string","description":"Terminal session id."},"signal":{"type":"string","description":"Signal to deliver. Shell-targeted SIGKILL is rejected; use terminal_close.","enum":["SIGINT","SIGTERM","SIGKILL","SIGTSTP","SIGHUP"]}},"required":["sessionId","signal"]}},{"name":"todo_write","description":"Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Mark every todo being actively worked on `in_progress` — several at once when work genuinely runs in parallel (e.g. concurrent subagents or background commands), one for sequential work; while work remains, at least one task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).","parameters":{"type":"object","properties":{"todos":{"type":"array","description":"The COMPLETE task list, replacing any previous list.","items":{"type":"object","additionalProperties":false,"properties":{"content":{"type":"string","description":"What the task is — a short imperative line."},"status":{"type":"string","description":"pending (not started) | in_progress (now) | completed (done).","enum":["pending","in_progress","completed"]}},"required":["content","status"]}}},"required":["todos"]}},{"name":"workflow","description":"Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const/oneOf — no pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.","parameters":{"type":"object","properties":{"script":{"type":"string","description":"The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."},"meta":{"type":"object","description":"The workflow identity block (plain JSON — never code).","additionalProperties":true,"properties":{"name":{"type":"string","description":"Short kebab-case workflow name."},"description":{"type":"string","description":"One-line description of what the workflow does."},"whenToUse":{"type":"string","description":"Optional guidance on when this workflow applies."},"phases":{"type":"array","description":"Optional phase declarations matched by phase() calls.","items":{"type":"object","additionalProperties":true,"properties":{"title":{"type":"string","description":"The phase title phase() calls match by exact string."},"detail":{"type":"string","description":"Optional one-line description of the phase."},"provider":{"type":"string","description":"Optional provider override this phase is expected to use."},"model":{"type":"string","description":"Optional model override this phase is expected to use."}},"required":["title"]}}},"required":["name","description"]},"args":{"type":"object","description":"Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]}).","additionalProperties":true}},"required":["script","meta"]}},{"name":"write","description":"Create or fully replace a UTF-8 text file.","parameters":{"type":"object","properties":{"file_path":{"type":"string","description":"Path to write, resolved by the filesystem backend."},"content":{"type":"string","description":"Full UTF-8 text content to write."}},"required":["file_path","content"]}}]},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-spawn","name":"terminal_open","argumentsDelta":"{\"type\":\"shell\",\"name\":\"main\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"911213f8-acce-47be-a4f2-9d72ef55d83a"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"pty-spawn"},"content":[{"type":"tool-result","toolCallId":"pty-spawn","content":[{"type":"text","text":"started terminal session pty-1 (main) [type: shell]\ndsh> "}],"isError":false}],"role":"user","id":"2da21b47-7fb3-444c-99a6-2c21743731ee"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-send","name":"terminal_send","argumentsDelta":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-send","name":"terminal_send","arguments":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-send","name":"terminal_send","arguments":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"cf12d7ee-322a-4057-97b0-98d828a96f1a"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":2,"callId":"pty-send","name":"terminal_send","arguments":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"pty-send"},"content":[{"type":"tool-result","toolCallId":"pty-send","content":[{"type":"text","text":"K\ndsh> \n[wait: stdin_read]\n[session: running]\n[output truncated]"}],"isError":false}],"role":"user","id":"d1ffb2dc-6a33-4c9e-aeb9-b87bf6da8617"},"meta":{"viewport":"printf 'PTY_OK\\n'\nPTY_OK\ndsh> ","waitReason":"stdin_read","sessionStatus":{"kind":"running"},"truncated":false}},"sourceEventSeqs":[25],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"step/start","data":{"turn":1,"step":3}}
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+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-read","name":"terminal_read","argumentsDelta":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-read","name":"terminal_read","arguments":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-read","name":"terminal_read","arguments":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"b9b99ae9-4685-4ee5-b951-fbe58f84c4e3"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[29,30,31,32,33],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":3,"callId":"pty-read","name":"terminal_read","arguments":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}}
+{"type":"tool/result","data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"pty-read"},"content":[{"type":"tool-result","toolCallId":"pty-read","content":[{"type":"text","text":"dsh> printf 'PTY_OK\\n'\nPTY_OK\ndsh> \n[lines: 0-3 of 3]"}],"isError":false}],"role":"user","id":"d0d7331d-0d54-457a-9f7b-beb22abd34e6"}},"sourceEventSeqs":[35],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":3}}
+{"type":"step/start","data":{"turn":1,"step":4}}
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+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-signal","name":"terminal_signal","argumentsDelta":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9bb8ec3d-6e6f-44a2-8957-8f2d855f4834"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[39,40,41,42,43],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":4,"callId":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"pty-signal"},"content":[{"type":"tool-result","toolCallId":"pty-signal","content":[{"type":"text","text":"Error: unknown PTY session pty-missing"}],"isError":true}],"role":"user","id":"16fc1ca2-0eca-42d7-85d0-31794424c260"}},"sourceEventSeqs":[45],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":4}}
+{"type":"step/start","data":{"turn":1,"step":5}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-kill","name":"terminal_close","argumentsDelta":"{\"sessionId\":\"pty-1\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-kill","name":"terminal_close","arguments":"{\"sessionId\":\"pty-1\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":5,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-kill","name":"terminal_close","arguments":"{\"sessionId\":\"pty-1\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"4ebdc957-0369-4bbb-a5a5-4d2ef8ac3493"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[49,50,51,52,53],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":5,"callId":"pty-kill","name":"terminal_close","arguments":"{\"sessionId\":\"pty-1\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"pty-kill"},"content":[{"type":"tool-result","toolCallId":"pty-kill","content":[{"type":"text","text":"closed terminal session pty-1"}],"isError":false}],"role":"user","id":"55a3e2cc-dbc5-44bf-a824-e3bbc8568cd5"}},"sourceEventSeqs":[55],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":5}}
+{"type":"step/start","data":{"turn":1,"step":6}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-list","name":"terminal_list","argumentsDelta":"{}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-list","name":"terminal_list","arguments":"{}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":6,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"tool-call","id":"pty-list","name":"terminal_list","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"6f956d23-5437-4a75-93a9-3abacd378e07"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[59,60,61,62,63],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":6,"callId":"pty-list","name":"terminal_list","arguments":"{}"}}
+{"type":"tool/result","data":{"turn":1,"step":6,"message":{"source":{"kind":"tool","callId":"pty-list"},"content":[{"type":"tool-result","toolCallId":"pty-list","content":[{"type":"text","text":"(no terminal sessions)"}],"isError":false}],"role":"user","id":"be12d914-6fe1-4c1e-8262-65b2aa9c20e5"}},"sourceEventSeqs":[65],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":6}}
+{"type":"step/start","data":{"turn":1,"step":7}}
+{"type":"assistant/chunk","data":{"turn":1,"step":7,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":7,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":7,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":7,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":7,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":7,"message":{"role":"assistant","content":[{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"9cca9680-5795-47d8-8edc-f6d44bcaa1ef"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[69,70,71,72,73],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":7}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/ralph-loop/session.1.jsonl b/examples/headless-agent/tests/snapshots/ralph-loop/session.1.jsonl
index d684022863..e07abe87f5 100644
--- a/examples/headless-agent/tests/snapshots/ralph-loop/session.1.jsonl
+++ b/examples/headless-agent/tests/snapshots/ralph-loop/session.1.jsonl
@@ -1,6 +1,6 @@
 {"type":"session","version":0,"id":"42222222-2222-4222-8222-222222222222","createdAt":1783951001000,"cwd":"{{cwd}}","parentSession":"41111111-1111-4111-8111-111111111111"}
-{"type":"assistant/chunk","seq":0,"time":1783951001001,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":1,"time":1783951001002,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"round-one-report","name":"structured_output","argumentsDelta":"{\"status\":\"continue\",\"summary\":\"ROUND_ONE_HANDOFF\",\"evidence\":[\"Round one inspected the workspace.\"],\"nextSteps\":[\"Finish the snapshot objective.\"],\"blocker\":\"\"}"}}}
-{"type":"assistant/chunk","seq":2,"time":1783951001003,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"round-one-report","name":"structured_output","arguments":"{\"status\":\"continue\",\"summary\":\"ROUND_ONE_HANDOFF\",\"evidence\":[\"Round one inspected the workspace.\"],\"nextSteps\":[\"Finish the snapshot objective.\"],\"blocker\":\"\"}"}}}}
-{"type":"assistant/chunk","seq":3,"time":1783951001004,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":30,"outputTokens":12}}}}
-{"type":"assistant/chunk","seq":4,"time":1783951001005,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"round-one-report","name":"structured_output","argumentsDelta":"{\"status\":\"continue\",\"summary\":\"ROUND_ONE_HANDOFF\",\"evidence\":[\"Round one inspected the workspace.\"],\"nextSteps\":[\"Finish the snapshot objective.\"],\"blocker\":\"\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"round-one-report","name":"structured_output","arguments":"{\"status\":\"continue\",\"summary\":\"ROUND_ONE_HANDOFF\",\"evidence\":[\"Round one inspected the workspace.\"],\"nextSteps\":[\"Finish the snapshot objective.\"],\"blocker\":\"\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":30,"outputTokens":12}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
diff --git a/examples/headless-agent/tests/snapshots/ralph-loop/session.2.jsonl b/examples/headless-agent/tests/snapshots/ralph-loop/session.2.jsonl
index 15f54b231b..3fe2c18412 100644
--- a/examples/headless-agent/tests/snapshots/ralph-loop/session.2.jsonl
+++ b/examples/headless-agent/tests/snapshots/ralph-loop/session.2.jsonl
@@ -1,6 +1,6 @@
 {"type":"session","version":0,"id":"43333333-3333-4333-8333-333333333333","createdAt":1783951002000,"cwd":"{{cwd}}","parentSession":"41111111-1111-4111-8111-111111111111"}
-{"type":"assistant/chunk","seq":0,"time":1783951002001,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":1,"time":1783951002002,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"round-two-report","name":"structured_output","argumentsDelta":"{\"status\":\"complete\",\"summary\":\"The Ralph snapshot objective is complete.\",\"evidence\":[\"Two fresh rounds completed through the shipped app.\"],\"nextSteps\":[],\"blocker\":\"\"}"}}}
-{"type":"assistant/chunk","seq":2,"time":1783951002003,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"round-two-report","name":"structured_output","arguments":"{\"status\":\"complete\",\"summary\":\"The Ralph snapshot objective is complete.\",\"evidence\":[\"Two fresh rounds completed through the shipped app.\"],\"nextSteps\":[],\"blocker\":\"\"}"}}}}
-{"type":"assistant/chunk","seq":3,"time":1783951002004,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":40,"outputTokens":12}}}}
-{"type":"assistant/chunk","seq":4,"time":1783951002005,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"round-two-report","name":"structured_output","argumentsDelta":"{\"status\":\"complete\",\"summary\":\"The Ralph snapshot objective is complete.\",\"evidence\":[\"Two fresh rounds completed through the shipped app.\"],\"nextSteps\":[],\"blocker\":\"\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"round-two-report","name":"structured_output","arguments":"{\"status\":\"complete\",\"summary\":\"The Ralph snapshot objective is complete.\",\"evidence\":[\"Two fresh rounds completed through the shipped app.\"],\"nextSteps\":[],\"blocker\":\"\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":40,"outputTokens":12}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
diff --git a/examples/headless-agent/tests/snapshots/subagent-settlement/child.expected.jsonl b/examples/headless-agent/tests/snapshots/subagent-settlement/child.expected.jsonl
index 9d63ab152c..f07a82ecbc 100644
--- a/examples/headless-agent/tests/snapshots/subagent-settlement/child.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/subagent-settlement/child.expected.jsonl
@@ -1,20 +1,20 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","parentSession":"{{sessionId}}","origin":"subagent","delegationDepth":1}
-{"type":"subagent/descriptor","seq":0,"time":0,"data":{"version":2,"mode":"continuable","provider":"spawn","label":"Return child result","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
-{"type":"session/end-seed","seq":1,"time":0,"data":{}}
-{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly CHILD_RESULT and nothing else. Do not call report."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":3,"time":0,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":4,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":5,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":0,"data":{"content":[{"type":"text","text":"Reply with exactly CHILD_RESULT and nothing else. Do not call report."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":8,"time":0,"data":{"title":"Reply with exactly CHILD_RESULT and","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":9,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":10,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_RESULT"}}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_RESULT"}}}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":16,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_RESULT"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
-{"type":"step/end","seq":17,"time":0,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":18,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"continuable","provider":"spawn","label":"Return child result","agentProvider":"deepseek-official","agentModel":"deepseek-v4-flash"}}
+{"type":"session/end-seed","data":{}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly CHILD_RESULT and nothing else. Do not call report."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly CHILD_RESULT and nothing else. Do not call report."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly CHILD_RESULT and","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_RESULT"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_RESULT"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_RESULT"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/snapshots/subagent-settlement/child.replay.jsonl b/examples/headless-agent/tests/snapshots/subagent-settlement/child.replay.jsonl
index 0f7362448a..6e1f89f9ec 100644
--- a/examples/headless-agent/tests/snapshots/subagent-settlement/child.replay.jsonl
+++ b/examples/headless-agent/tests/snapshots/subagent-settlement/child.replay.jsonl
@@ -1,6 +1,6 @@
 {"type":"session","version":0,"id":"subagent-settlement-child","createdAt":2,"delegationDepth":1}
-{"type":"assistant/chunk","seq":0,"time":1,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":1,"time":2,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_RESULT"}}}
-{"type":"assistant/chunk","seq":2,"time":3,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_RESULT"}}}}
-{"type":"assistant/chunk","seq":3,"time":4,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":4,"time":5,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"CHILD_RESULT"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_RESULT"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
diff --git a/examples/headless-agent/tests/subagent-diagnostic-snapshots/descriptorless-child/parent.expected.jsonl b/examples/headless-agent/tests/subagent-diagnostic-snapshots/descriptorless-child/parent.expected.jsonl
index 5c47dcdaba..d258caf66b 100644
--- a/examples/headless-agent/tests/subagent-diagnostic-snapshots/descriptorless-child/parent.expected.jsonl
+++ b/examples/headless-agent/tests/subagent-diagnostic-snapshots/descriptorless-child/parent.expected.jsonl
@@ -1,31 +1,31 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":0,"data":{"turn":1}}
-{"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Start a background job."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"turn/end","seq":2,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"session/end-seed","seq":3,"time":0,"data":{}}
-{"type":"agent/inbox/spliced","seq":4,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call list_agents once and report what it shows."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":5,"time":0,"data":{"turn":2}}
-{"type":"agent/inbox/spliced","seq":6,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":7,"time":0,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":8,"time":0,"data":{"content":[{"type":"text","text":"Call list_agents once and report what it shows."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":9,"time":0,"data":{"title":"Start a background job.","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":10,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":11,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"list-once","name":"list_agents","argumentsDelta":"{}"}}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"list-once","name":"list_agents","arguments":"{}"}}}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":17,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"list-once","name":"list_agents","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[12,13,14,15,16],"surfaceOp":"append"}
-{"type":"tool/call","seq":18,"time":0,"data":{"turn":2,"step":1,"callId":"list-once","name":"list_agents","arguments":"{}"}}
-{"type":"tool/result","seq":19,"time":0,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"list-once"},"content":[{"type":"tool-result","toolCallId":"list-once","content":[{"type":"text","text":"{{sessionId}} [diagnostic: corrupt]"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[18],"surfaceOp":"append"}
-{"type":"step/end","seq":20,"time":0,"data":{"turn":2,"step":1}}
-{"type":"step/start","seq":21,"time":0,"data":{"turn":2,"step":2}}
-{"type":"assistant/chunk","seq":22,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":23,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"text-delta","index":0,"text":"The stored subagent is unreadable. PARENT_DONE"}}}
-{"type":"assistant/chunk","seq":24,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"The stored subagent is unreadable. PARENT_DONE"}}}}
-{"type":"assistant/chunk","seq":25,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":26,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":27,"time":0,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"The stored subagent is unreadable. PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[22,23,24,25,26],"surfaceOp":"append"}
-{"type":"step/end","seq":28,"time":0,"data":{"turn":2,"step":2}}
-{"type":"turn/end","seq":29,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Start a background job."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"session/end-seed","data":{}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Call list_agents once and report what it shows."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Call list_agents once and report what it shows."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Start a background job.","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"list-once","name":"list_agents","argumentsDelta":"{}"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"list-once","name":"list_agents","arguments":"{}"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"list-once","name":"list_agents","arguments":"{}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[12,13,14,15,16],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":2,"step":1,"callId":"list-once","name":"list_agents","arguments":"{}"}}
+{"type":"tool/result","data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"list-once"},"content":[{"type":"tool-result","toolCallId":"list-once","content":[{"type":"text","text":"{{sessionId}} [diagnostic: corrupt]"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[18],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"step/start","data":{"turn":2,"step":2}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"text-delta","index":0,"text":"The stored subagent is unreadable. PARENT_DONE"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"The stored subagent is unreadable. PARENT_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"The stored subagent is unreadable. PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[22,23,24,25,26],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":2}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/subagent-diagnostic.snapshot.ts b/examples/headless-agent/tests/subagent-diagnostic.snapshot.ts
index 16b4fa7328..2bc81e9a9d 100644
--- a/examples/headless-agent/tests/subagent-diagnostic.snapshot.ts
+++ b/examples/headless-agent/tests/subagent-diagnostic.snapshot.ts
@@ -8,7 +8,7 @@ import { readFile, readdir, writeFile } from 'node:fs/promises'
 import { join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import { Context } from '@deepseek-ai/cordis'
-import { normalizeSessionLog, scrubRequestHeaders, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
+import { normalizeSessionSnapshot, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
 import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-loader-smoke'
 import { createUserMessage } from '@deepseek-ai/dsh-llm'
 import SessionStore, { SESSION_FORMAT_VERSION, SessionId, type SessionEvent, type SessionHeader } from '@deepseek-ai/dsh-session'
@@ -101,7 +101,7 @@ describe('descriptor-less cold child diagnostic snapshot', () => {
         expect(parent).toContain(`${childId} [diagnostic: corrupt]`)
 
         const context: NormalizeContext = { sessionIds: [parentId, childId], cwd }
-        const normalizedParent = scrubRequestHeaders(normalizeSessionLog(parent, context))
+        const normalizedParent = normalizeSessionSnapshot(parent, context)
         if (refreshing) {
           await writeFile(parentExpected, normalizedParent)
         }
diff --git a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl
index 1711b58c84..013d23d9ee 100644
--- a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl
+++ b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl
@@ -1,30 +1,30 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","parentSession":"{{sessionId}}","origin":"subagent","delegationDepth":1}
-{"type":"sandbox/mode","seq":0,"time":0,"data":{"mode":"read-only","source":"delegation"}}
-{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":3,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":4,"time":0,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Delegated write probe"}}
-{"type":"step/start","seq":5,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":6,"time":0,"data":{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":7,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":8,"time":0,"data":{"title":"Use the write tool exactly","messageSeqs":[6],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":9,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":10,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"child-write","name":"write","argumentsDelta":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":16,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
-{"type":"tool/call","seq":17,"time":0,"data":{"turn":1,"step":1,"callId":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}
-{"type":"tool/result","seq":18,"time":0,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"child-write"},"content":[{"type":"tool-result","toolCallId":"child-write","content":[{"type":"text","text":"Error: [sandbox: file access denied under read-only mode]\n[sandbox: escalation available — retry this exact operation once with sandbox_permissions (the narrowest wider mode that suffices) + justification; the approval prompt asks the user]"}],"isError":true}],"role":"user","id":"{{sessionId}}"},"error":{"name":"FsError","code":"FS_SANDBOX_DENIED"}},"sourceEventSeqs":[17],"surfaceOp":"append"}
-{"type":"step/end","seq":19,"time":0,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":20,"time":0,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":21,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":22,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}
-{"type":"assistant/chunk","seq":23,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}}
-{"type":"assistant/chunk","seq":24,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":25,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":26,"time":0,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[21,22,23,24,25],"surfaceOp":"append"}
-{"type":"step/end","seq":27,"time":0,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":28,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"sandbox/mode","data":{"mode":"read-only","source":"delegation"}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Delegated write probe"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."},{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Use the write tool exactly","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"child-write","name":"write","argumentsDelta":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":1,"step":1,"callId":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}
+{"type":"tool/result","data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"child-write"},"content":[{"type":"tool-result","toolCallId":"child-write","content":[{"type":"text","text":"Error: [sandbox: file access denied under read-only mode]\n[sandbox: escalation available — retry this exact operation once with sandbox_permissions (the narrowest wider mode that suffices) + justification; the approval prompt asks the user]"}],"isError":true}],"role":"user","id":"{{sessionId}}"},"error":{"name":"FsError","code":"FS_SANDBOX_DENIED"}},"sourceEventSeqs":[17],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[21,22,23,24,25],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.replay.jsonl b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.replay.jsonl
index 99947a3797..08b87f3e9b 100644
--- a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.replay.jsonl
+++ b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.replay.jsonl
@@ -1,18 +1,18 @@
 {"type": "session", "version": 0, "id": "subagent-inheritance-child", "createdAt": 2, "delegationDepth": 1}
-{"type":"turn/start","seq":0,"time":1,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"user/message","seq":1,"time":2,"data":{"content":[{"type":"text","text":"delegated task"}],"source":{"kind":"user"}},"surfaceOp":"append"}
-{"type":"step/start","seq":2,"time":3,"data":{"turn":1,"step":1}}
-{"type":"assistant/chunk","seq":3,"time":4,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":4,"time":5,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"child-write","name":"write","argumentsDelta":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}
-{"type":"assistant/chunk","seq":5,"time":6,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}}
-{"type":"assistant/chunk","seq":6,"time":7,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":7,"time":8,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"step/end","seq":8,"time":9,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":9,"time":10,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":10,"time":11,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":11,"time":12,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}
-{"type":"assistant/chunk","seq":12,"time":13,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}}
-{"type":"assistant/chunk","seq":13,"time":14,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":14,"time":15,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"step/end","seq":15,"time":16,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":16,"time":17,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"delegated task"}],"source":{"kind":"user"}},"surfaceOp":"append"}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"child-write","name":"write","argumentsDelta":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"step/start","data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl
index 0bdcc94938..9efed81901 100644
--- a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl
+++ b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl
@@ -1,33 +1,33 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":0,"data":{"turn":1}}
-{"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Tighten this session to read-only."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"sandbox/mode","seq":2,"time":0,"data":{"mode":"read-only"}}
-{"type":"turn/end","seq":3,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"session/end-seed","seq":4,"time":0,"data":{}}
-{"type":"agent/inbox/spliced","seq":5,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":6,"time":0,"data":{"turn":2}}
-{"type":"agent/inbox/spliced","seq":7,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":8,"time":0,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":9,"time":0,"data":{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":10,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":11,"time":0,"data":{"title":"Tighten this session to read-only.","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":12,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":13,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"delegate-write","name":"subagent","argumentsDelta":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}}
-{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}}}
-{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":19,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[14,15,16,17,18],"surfaceOp":"append"}
-{"type":"tool/call","seq":20,"time":0,"data":{"turn":2,"step":1,"callId":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}
-{"type":"tool/result","seq":21,"time":0,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"delegate-write"},"content":[{"type":"tool-result","toolCallId":"delegate-write","content":[{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[20],"surfaceOp":"append"}
-{"type":"step/end","seq":22,"time":0,"data":{"turn":2,"step":1}}
-{"type":"step/start","seq":23,"time":0,"data":{"turn":2,"step":2}}
-{"type":"assistant/chunk","seq":24,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":25,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"text-delta","index":0,"text":"The delegated child was denied by the sandbox. PARENT_DONE"}}}
-{"type":"assistant/chunk","seq":26,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"The delegated child was denied by the sandbox. PARENT_DONE"}}}}
-{"type":"assistant/chunk","seq":27,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":28,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":29,"time":0,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"The delegated child was denied by the sandbox. PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[24,25,26,27,28],"surfaceOp":"append"}
-{"type":"step/end","seq":30,"time":0,"data":{"turn":2,"step":2}}
-{"type":"turn/end","seq":31,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Tighten this session to read-only."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"sandbox/mode","data":{"mode":"read-only"}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"session/end-seed","data":{}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"sandbox:policy","text":"Current DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Tighten this session to read-only.","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"delegate-write","name":"subagent","argumentsDelta":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[14,15,16,17,18],"surfaceOp":"append"}
+{"type":"tool/call","data":{"turn":2,"step":1,"callId":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}
+{"type":"tool/result","data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"delegate-write"},"content":[{"type":"tool-result","toolCallId":"delegate-write","content":[{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[20],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"step/start","data":{"turn":2,"step":2}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"text-delta","index":0,"text":"The delegated child was denied by the sandbox. PARENT_DONE"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"The delegated child was denied by the sandbox. PARENT_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"The delegated child was denied by the sandbox. PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[24,25,26,27,28],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":2}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/subagent-inheritance.snapshot.ts b/examples/headless-agent/tests/subagent-inheritance.snapshot.ts
index 0468965368..8ca9855ed4 100644
--- a/examples/headless-agent/tests/subagent-inheritance.snapshot.ts
+++ b/examples/headless-agent/tests/subagent-inheritance.snapshot.ts
@@ -7,7 +7,7 @@ import { readFile, readdir, writeFile } from 'node:fs/promises'
 import { join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import { Context } from '@deepseek-ai/cordis'
-import { normalizeSessionLog, scrubRequestHeaders, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
+import { normalizeSessionSnapshot, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
 import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-loader-smoke'
 import { createUserMessage } from '@deepseek-ai/dsh-llm'
 import SessionStore, { SESSION_FORMAT_VERSION, SessionId, type SessionEvent, type SessionHeader } from '@deepseek-ai/dsh-session'
@@ -119,8 +119,8 @@ describe('parent-only override inheritance snapshot', () => {
         }
 
         const context: NormalizeContext = { sessionIds: [sessionId, String(headerOf(child).id)], cwd }
-        const normalizedParent = scrubRequestHeaders(normalizeSessionLog(parent, context))
-        const normalizedChild = scrubRequestHeaders(normalizeSessionLog(child, context))
+        const normalizedParent = normalizeSessionSnapshot(parent, context)
+        const normalizedChild = normalizeSessionSnapshot(child, context)
         if (refreshing) {
           await writeFile(parentExpected, normalizedParent)
           await writeFile(childExpected, normalizedChild)
diff --git a/examples/headless-agent/tests/workspace-context-resume-snapshots/offline-edit/session.expected.jsonl b/examples/headless-agent/tests/workspace-context-resume-snapshots/offline-edit/session.expected.jsonl
index 1d4fccab80..61ccf66eb5 100644
--- a/examples/headless-agent/tests/workspace-context-resume-snapshots/offline-edit/session.expected.jsonl
+++ b/examples/headless-agent/tests/workspace-context-resume-snapshots/offline-edit/session.expected.jsonl
@@ -1,22 +1,22 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":0,"data":{"turn":1}}
-{"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Remember the workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":2,"time":0,"data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nOld workspace instruction.\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","baseline":true,"baselineIdentity":"{\"projectRoot\":\"\",\"projectRootMarkers\":[\".git\"],\"maxBytes\":65536,\"maxSourceBytes\":1048576,\"instructionFileCandidates\":[\"AGENTS.md\",\"CLAUDE.md\"],\"localInstructionFileCandidates\":[\"AGENTS.local.md\",\"CLAUDE.local.md\"]}","changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"ba65bdb41810f4d0129129dcbd6cadcd643c069d"}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"turn/end","seq":3,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"session/end-seed","seq":4,"time":0,"data":{}}
-{"type":"agent/inbox/spliced","seq":5,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Acknowledge the current workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":6,"time":0,"data":{"turn":2}}
-{"type":"agent/inbox/spliced","seq":7,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":8,"time":0,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":9,"time":0,"data":{"content":[{"type":"text","text":"Acknowledge the current workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":10,"time":0,"data":{"content":[{"type":"text","text":"<system-reminder>\nUpdated instructions from: AGENTS.md\n\nThis file changed after it was loaded. Use the following content instead of the previously loaded instructions from this file.\n\nNew workspace instruction after offline edit.\n\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","changes":[{"action":"replace","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"d8375b516f158718bd3463bc8eb7ed42c011b29f"}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":11,"time":0,"data":{"title":"Remember the workspace instruction.","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":12,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}"},"reason":"initial"}}
-{"type":"request/context","seq":13,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"RESUME_DONE"}}}
-{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"RESUME_DONE"}}}}
-{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":18,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"RESUME_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"sourceEventSeqs":[14,15,16,17],"surfaceOp":"append"}
-{"type":"step/end","seq":19,"time":0,"data":{"turn":2,"step":1}}
-{"type":"turn/end","seq":20,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Remember the workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nOld workspace instruction.\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","baseline":true,"baselineIdentity":"{\"projectRoot\":\"\",\"projectRootMarkers\":[\".git\"],\"maxBytes\":65536,\"maxSourceBytes\":1048576,\"instructionFileCandidates\":[\"AGENTS.md\",\"CLAUDE.md\"],\"localInstructionFileCandidates\":[\"AGENTS.local.md\",\"CLAUDE.local.md\"]}","changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"ba65bdb41810f4d0129129dcbd6cadcd643c069d"}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"session/end-seed","data":{}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Acknowledge the current workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Acknowledge the current workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<system-reminder>\nUpdated instructions from: AGENTS.md\n\nThis file changed after it was loaded. Use the following content instead of the previously loaded instructions from this file.\n\nNew workspace instruction after offline edit.\n\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","changes":[{"action":"replace","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"d8375b516f158718bd3463bc8eb7ed42c011b29f"}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Remember the workspace instruction.","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"RESUME_DONE"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"RESUME_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"RESUME_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"sourceEventSeqs":[14,15,16,17],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/workspace-context-resume-snapshots/precedence-change/session.expected.jsonl b/examples/headless-agent/tests/workspace-context-resume-snapshots/precedence-change/session.expected.jsonl
index e65d26d31a..d65c290b35 100644
--- a/examples/headless-agent/tests/workspace-context-resume-snapshots/precedence-change/session.expected.jsonl
+++ b/examples/headless-agent/tests/workspace-context-resume-snapshots/precedence-change/session.expected.jsonl
@@ -1,22 +1,22 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":0,"data":{"turn":1}}
-{"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Remember the workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":2,"time":0,"data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: CLAUDE.md\n\nOld CLAUDE rule.\n\nInstructions from: AGENTS.md\n\nOld AGENTS rule.\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","baseline":true,"baselineIdentity":"{\"projectRoot\":\"\",\"projectRootMarkers\":[\".git\"],\"maxBytes\":65536,\"maxSourceBytes\":1048576,\"instructionFileCandidates\":[\"CLAUDE.md\",\"AGENTS.md\"],\"localInstructionFileCandidates\":[\"AGENTS.local.md\",\"CLAUDE.local.md\"]}","changes":[{"action":"set","scope":".\u0000CLAUDE.md","path":"CLAUDE.md","digest":"b525eb8a6d3660b732dad4b0aff1b7c63ab32890"},{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"3113bd093ae91976207dcef7390bdc0b2bfcfa10"}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"turn/end","seq":3,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"session/end-seed","seq":4,"time":0,"data":{}}
-{"type":"agent/inbox/spliced","seq":5,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Acknowledge the current workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
-{"type":"turn/start","seq":6,"time":0,"data":{"turn":2}}
-{"type":"agent/inbox/spliced","seq":7,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":8,"time":0,"data":{"turn":2,"step":1}}
-{"type":"user/message","seq":9,"time":0,"data":{"content":[{"type":"text","text":"Acknowledge the current workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":10,"time":0,"data":{"content":[{"type":"text","text":"<system-reminder>\nThis complete workspace instruction baseline replaces all earlier workspace instruction baselines. The following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nCurrent AGENTS rule.\n\n\nInstructions from: CLAUDE.md\n\nCurrent CLAUDE rule.\n\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","baseline":true,"baselineIdentity":"{\"projectRoot\":\"\",\"projectRootMarkers\":[\".git\"],\"maxBytes\":65536,\"maxSourceBytes\":1048576,\"instructionFileCandidates\":[\"AGENTS.md\",\"CLAUDE.md\"],\"localInstructionFileCandidates\":[\"AGENTS.local.md\",\"CLAUDE.local.md\"]}","changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"7f53d2327837129750aef117f9754a001c46cf68"},{"action":"set","scope":".\u0000CLAUDE.md","path":"CLAUDE.md","digest":"5b1e9e3fd759eee6b43ceff899e47fb10c64701a"}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":11,"time":0,"data":{"title":"Remember the workspace instruction.","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":12,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}"},"reason":"initial"}}
-{"type":"request/context","seq":13,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"RESUME_DONE"}}}
-{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"RESUME_DONE"}}}}
-{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":18,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"RESUME_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"sourceEventSeqs":[14,15,16,17],"surfaceOp":"append"}
-{"type":"step/end","seq":19,"time":0,"data":{"turn":2,"step":1}}
-{"type":"turn/end","seq":20,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Remember the workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<system-reminder>\nThe following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: CLAUDE.md\n\nOld CLAUDE rule.\n\nInstructions from: AGENTS.md\n\nOld AGENTS rule.\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","baseline":true,"baselineIdentity":"{\"projectRoot\":\"\",\"projectRootMarkers\":[\".git\"],\"maxBytes\":65536,\"maxSourceBytes\":1048576,\"instructionFileCandidates\":[\"CLAUDE.md\",\"AGENTS.md\"],\"localInstructionFileCandidates\":[\"AGENTS.local.md\",\"CLAUDE.local.md\"]}","changes":[{"action":"set","scope":".\u0000CLAUDE.md","path":"CLAUDE.md","digest":"b525eb8a6d3660b732dad4b0aff1b7c63ab32890"},{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"3113bd093ae91976207dcef7390bdc0b2bfcfa10"}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"session/end-seed","data":{}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Acknowledge the current workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","data":{"turn":2}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":2,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Acknowledge the current workspace instruction."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"<system-reminder>\nThis complete workspace instruction baseline replaces all earlier workspace instruction baselines. The following workspace instructions may be relevant to your work. Use them as guidance when applicable. More specific instructions take precedence over broader ones. They do not override system, developer, or direct user instructions.\n\nInstructions from: AGENTS.md\n\nCurrent AGENTS rule.\n\n\nInstructions from: CLAUDE.md\n\nCurrent CLAUDE rule.\n\n</system-reminder>"}],"source":{"kind":"agent-instructions","form":"instructions","baseline":true,"baselineIdentity":"{\"projectRoot\":\"\",\"projectRootMarkers\":[\".git\"],\"maxBytes\":65536,\"maxSourceBytes\":1048576,\"instructionFileCandidates\":[\"AGENTS.md\",\"CLAUDE.md\"],\"localInstructionFileCandidates\":[\"AGENTS.local.md\",\"CLAUDE.local.md\"]}","changes":[{"action":"set","scope":".\u0000AGENTS.md","path":"AGENTS.md","digest":"7f53d2327837129750aef117f9754a001c46cf68"},{"action":"set","scope":".\u0000CLAUDE.md","path":"CLAUDE.md","digest":"5b1e9e3fd759eee6b43ceff899e47fb10c64701a"}]},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Remember the workspace instruction.","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"RESUME_DONE"}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"RESUME_DONE"}}}}
+{"type":"assistant/chunk","data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"RESUME_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"sourceEventSeqs":[14,15,16,17],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":2,"step":1}}
+{"type":"turn/end","data":{"turn":2,"reason":{"kind":"completed"}}}
diff --git a/examples/headless-agent/tests/workspace-context-resume.snapshot.ts b/examples/headless-agent/tests/workspace-context-resume.snapshot.ts
index eb8f027fe5..4dee8015a7 100644
--- a/examples/headless-agent/tests/workspace-context-resume.snapshot.ts
+++ b/examples/headless-agent/tests/workspace-context-resume.snapshot.ts
@@ -8,7 +8,7 @@ import { mkdir, readFile, readdir, writeFile } from 'node:fs/promises'
 import { dirname, join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import { Context } from '@deepseek-ai/cordis'
-import { normalizeSessionLog, scrubRequestHeaders, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
+import { normalizeSessionSnapshot, type NormalizeContext } from '@deepseek-ai/dsh-acp-snapshot'
 import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-loader-smoke'
 import { createUserMessage } from '@deepseek-ai/dsh-llm'
 import SessionStore, {
@@ -135,7 +135,7 @@ describe('agent-instructions resume snapshot', () => {
       },
       inspect: async () => {
         const normalization: NormalizeContext = { sessionIds: [sessionId], cwd }
-        const session = scrubRequestHeaders(normalizeSessionLog(await readFile(sessionPath, 'utf8'), normalization))
+        const session = normalizeSessionSnapshot(await readFile(sessionPath, 'utf8'), normalization)
         if (refreshing) await writeFile(sessionExpected, session)
         expect(session).toBe(await readFile(sessionExpected, 'utf8'))
 
@@ -199,7 +199,7 @@ describe('agent-instructions resume snapshot', () => {
       },
       inspect: async () => {
         const normalization: NormalizeContext = { sessionIds: [sessionId], cwd }
-        const session = scrubRequestHeaders(normalizeSessionLog(await readFile(sessionPath, 'utf8'), normalization))
+        const session = normalizeSessionSnapshot(await readFile(sessionPath, 'utf8'), normalization)
         if (refreshing) {
           await mkdir(dirname(precedenceExpected), { recursive: true })
           await writeFile(precedenceExpected, session)
diff --git a/examples/jsonrpc-agent/tests/sdk.snapshot.ts b/examples/jsonrpc-agent/tests/sdk.snapshot.ts
index 9b45292df5..ef680052be 100644
--- a/examples/jsonrpc-agent/tests/sdk.snapshot.ts
+++ b/examples/jsonrpc-agent/tests/sdk.snapshot.ts
@@ -20,6 +20,7 @@ import {
   normalizeStdout,
   refreshFixtureReplacements,
   scrubRequestHeaders,
+  scrubSessionSnapshot,
   stabilizeFixtureMessageIds,
   stabilizeRefreshLog,
   tokenizeSessionFixtureCwd,
@@ -362,7 +363,7 @@ describe('TypeScript SDK snapshots over the jsonrpc runtime', () => {
         await mkdir(scenarioDir, { recursive: true })
         const existing = await Promise.all(files.map(async file => existsSync(file) ? readFile(file, 'utf8') : ''))
         const fixtures = stabilizeFixtureMessageIds(
-          ordered.map(log => scrubRequestHeaders(tokenizeSessionFixtureCwd(log.content))),
+          ordered.map(log => scrubSessionSnapshot(tokenizeSessionFixtureCwd(log.content))),
           existing,
         )
         await Promise.all(fixtures.map(async (fixture, index) => {
@@ -385,7 +386,7 @@ describe('TypeScript SDK snapshots over the jsonrpc runtime', () => {
         const refreshed = ordered.map((log, index) => {
           const existing = expectedContents[index]
           if (existing === undefined) throw new Error(`no fixture for persisted log ${index}`)
-          return scrubRequestHeaders(tokenizeSessionFixtureCwd(
+          return scrubSessionSnapshot(tokenizeSessionFixtureCwd(
             stabilizeRefreshLog(log.content, existing, replacements, actualContext),
           ))
         })
diff --git a/examples/jsonrpc-agent/tests/snapshots/bash-tool/session.jsonl b/examples/jsonrpc-agent/tests/snapshots/bash-tool/session.jsonl
index c2ea52eb1b..ab9e6ef440 100644
--- a/examples/jsonrpc-agent/tests/snapshots/bash-tool/session.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/bash-tool/session.jsonl
@@ -1,33 +1,33 @@
 {"type":"session","version":0,"id":"sdk-snapshot-bash","createdAt":1785097395899,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498589606,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"8ef0b6e2-40ab-430b-b4df-6514323c7270"}]}}
-{"type":"turn/start","seq":1,"time":1785821460035,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821460035,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1785097395908,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498589630,"data":{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"8ef0b6e2-40ab-430b-b4df-6514323c7270"},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1785498589630,"data":{"title":"Run this exact command with","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":6,"time":1785498589632,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":7,"time":1785730506490,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":8,"time":1785097396657,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
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-{"type":"assistant/chunk","seq":92,"time":1785097398409,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The command produced the expected output. I'll reply with just that stdout."}}}}
-{"type":"assistant/chunk","seq":93,"time":1785097398409,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"dsh-sdk-proof-7391"}}}}
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-{"type":"assistant/chunk","seq":95,"time":1785730506530,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":96,"time":1785730506530,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command produced the expected output. I'll reply with just that stdout."},{"type":"text","text":"dsh-sdk-proof-7391"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"54a3c713-55c2-4e95-9437-e7e3680b18ae"},"usage":{"inputTokens":233,"outputTokens":24,"cacheReadTokens":1664,"reasoningTokens":15}},"sourceEventSeqs":[67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95],"surfaceOp":"append"}
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-{"type":"turn/end","seq":98,"time":1785730506531,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"8ef0b6e2-40ab-430b-b4df-6514323c7270"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Run this exact command with your bash tool, then reply with its stdout only: echo dsh-sdk-proof-7391"}],"source":{"kind":"user"},"role":"user","id":"8ef0b6e2-40ab-430b-b4df-6514323c7270"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Run this exact command with","messageSeqs":[4],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
+{"type":"reasoning-chunks","data":{"turn":1,"step":1,"index":0,"dt":[1,0,0,0,1,24,25,0,0,25,1,24,1,0,75,1],"texts":["The"," user"," wants"," me"," to"," run"," a"," specific"," bash"," command"," and"," reply"," with"," its"," stdout"," only","."]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
+{"type":"tool-call-chunks","data":{"turn":1,"step":1,"index":1,"dt":[24,1,0,0,25,0,0,0,0,1,24,0,0,1,24,1,25,0,0,0,25,0,0,25,1,0,0,25,55,0],"id":"call_00_Ry17evSfTr0uJnHhg3X93070","name":"bash","args":["","{","\"","command","\"",": ","\"","echo"," d","sh","-s","dk","-proof","-","739","1","\"",", ","\"","description","\"",": ","\"","Run"," the"," echo"," command"," as"," requested","\"","}"]}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The user wants me to run a specific bash command and reply with its stdout only."}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"tool-call","id":"call_00_Ry17evSfTr0uJnHhg3X93070","name":"bash","arguments":"{\"command\": \"echo dsh-sdk-proof-7391\", \"description\": \"Run the echo command as requested\"}"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":123,"outputTokens":89,"cacheReadTokens":1664,"reasoningTokens":17}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to run a specific bash command and reply with its stdout only."},{"type":"tool-call","id":"call_00_Ry17evSfTr0uJnHhg3X93070","name":"bash","arguments":"{\"command\": \"echo dsh-sdk-proof-7391\", \"description\": \"Run the echo command as requested\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"f899e1ce-0802-4305-b2ff-295c858ba09c"},"usage":{"inputTokens":123,"outputTokens":89,"cacheReadTokens":1664,"reasoningTokens":17}},"sourceEventSeqs":[8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61],"surfaceOp":"append"}
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+{"type":"step/start","data":{"turn":1,"step":2}}
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+{"type":"reasoning-chunks","data":{"turn":1,"step":2,"index":0,"dt":[1,0,24,1,0,0,25,0,0,26,1,0,0,0],"texts":["The"," command"," produced"," the"," expected"," output","."," I","'ll"," reply"," with"," just"," that"," stdout","."]}}
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+{"type":"assistant/chunk","data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The command produced the expected output. I'll reply with just that stdout."},{"type":"text","text":"dsh-sdk-proof-7391"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"54a3c713-55c2-4e95-9437-e7e3680b18ae"},"usage":{"inputTokens":233,"outputTokens":24,"cacheReadTokens":1664,"reasoningTokens":15}},"sourceEventSeqs":[67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":2}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/examples/jsonrpc-agent/tests/snapshots/persistent-tools/session.jsonl b/examples/jsonrpc-agent/tests/snapshots/persistent-tools/session.jsonl
index 77fe6f03a6..33331daec0 100644
--- a/examples/jsonrpc-agent/tests/snapshots/persistent-tools/session.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/persistent-tools/session.jsonl
@@ -1,77 +1,77 @@
 {"type":"session","version":0,"id":"persistent-tools-snapshot","createdAt":1785331618309,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498592367,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Prove that bash state persists. Then create {{cwd}}/note.txt with a tab-indented line, view it, replace that literal tab-indented line, and make the persistent shell exit with code 9."}],"source":{"kind":"user"},"role":"user","id":"9a08e199-69d7-4b85-bfa4-27b41a92672a"}]}}
-{"type":"turn/start","seq":1,"time":1785821461907,"data":{"turn":1}}
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-{"type":"step/start","seq":3,"time":1785331618312,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498592368,"data":{"content":[{"type":"text","text":"Prove that bash state persists. Then create {{cwd}}/note.txt with a tab-indented line, view it, replace that literal tab-indented line, and make the persistent shell exit with code 9."}],"source":{"kind":"user"},"role":"user","id":"9a08e199-69d7-4b85-bfa4-27b41a92672a"},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1785498592368,"data":{"title":"Prove that bash state persists.","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":6,"time":1786547087174,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":7,"time":1786547087175,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
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index 0e7855cd86..610389b650 100644
--- a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn-in-process/session.1.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn-in-process/session.1.jsonl
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diff --git a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn-in-process/session.jsonl b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn-in-process/session.jsonl
index dc9c8febc2..8117ac217e 100644
--- a/examples/jsonrpc-agent/tests/snapshots/subagent-spawn-in-process/session.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/subagent-spawn-in-process/session.jsonl
@@ -1,33 +1,33 @@
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diff --git a/examples/jsonrpc-agent/tests/snapshots/text-turn/session.jsonl b/examples/jsonrpc-agent/tests/snapshots/text-turn/session.jsonl
index 08b526a0ef..b36e64b01e 100644
--- a/examples/jsonrpc-agent/tests/snapshots/text-turn/session.jsonl
+++ b/examples/jsonrpc-agent/tests/snapshots/text-turn/session.jsonl
@@ -1,20 +1,20 @@
 {"type":"session","version":0,"id":"sdk-snapshot-text","createdAt":1785097381464,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498588575,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"2950333f-90ff-4b11-b8f9-082612c97488"}]}}
-{"type":"turn/start","seq":1,"time":1785821459144,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821459144,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1785097381472,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498588596,"data":{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"2950333f-90ff-4b11-b8f9-082612c97488"},"surfaceOp":"append"}
-{"type":"session/title","seq":5,"time":1785498588596,"data":{"title":"Reply with exactly: SDK snapshot","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":6,"time":1785498588599,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":7,"time":1785730505700,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":8,"time":1785097382117,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
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-{"type":"assistant/chunk","seq":34,"time":1785097382279,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"SDK snapshot OK"}}}}
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-{"type":"turn/end","seq":39,"time":1785730505710,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly: SDK snapshot OK"}],"source":{"kind":"user"},"role":"user","id":"2950333f-90ff-4b11-b8f9-082612c97488"}]}}
+{"type":"turn/start","data":{"turn":1}}
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+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
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+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":1769,"outputTokens":24,"cacheReadTokens":0,"reasoningTokens":19}}}}
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+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The user wants me to reply with exactly \"SDK snapshot OK\". Let me do that."},{"type":"text","text":"SDK snapshot OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"3dd28f2f-9314-41a8-bf15-851be3652c14"},"usage":{"inputTokens":1769,"outputTokens":24,"cacheReadTokens":0,"reasoningTokens":19}},"sourceEventSeqs":[8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/packages/test-support/acp-snapshot/README.i18n.yaml b/packages/test-support/acp-snapshot/README.i18n.yaml
index 3f84ad8132..3eb2aa883a 100644
--- a/packages/test-support/acp-snapshot/README.i18n.yaml
+++ b/packages/test-support/acp-snapshot/README.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/test-support/acp-snapshot/README.md
-README.md: 31f4ec0caeb995a10202d4a452ee7e433749762f
-README.zh.md: e92d3f17c62b4fe7dea4f5b6c5a0738eef635327
+README.md: ff239963f3733f07ac3ed255b29fccfdb6841687
+README.zh.md: b328d3dea4a7e76f0c7bf2010728c79046d8113d
diff --git a/packages/test-support/acp-snapshot/README.md b/packages/test-support/acp-snapshot/README.md
index 31f4ec0cae..ff239963f3 100644
--- a/packages/test-support/acp-snapshot/README.md
+++ b/packages/test-support/acp-snapshot/README.md
@@ -8,10 +8,10 @@ Four layers, importable separately:
 
 - **`launchAcpTestAgent` (launcher)** — boots a source agent under tsx or a built `lib` agent under plain Node from a supplied cwd, connects the SDK client over a raw-byte stdout tee, collects session updates and stderr, surfaces asynchronous spawn failures through startup, fails closed on unhandled permission requests, and owns graceful or signalled shutdown. Shutdown waits for process exit, inherited stdio closure, and ACP parser exhaustion before resolving or propagating a child error, so captures are complete and callers can remove owned paths after either outcome. When Windows accepts forced termination but publishes its exit marker asynchronously, shutdown gives that marker a bounded grace before treating fallback refusal as a second failure. Snapshot and ordinary e2e suites share this process boundary; a test supplies only agent paths, cwd, environment overrides, and any permission policy.
 - **`runScenario` (harness)** — drives ACP JSON-RPC stdio from a deterministic `input.json` script through the launcher, tees raw stdout for the expected-output and purity checks, and harvests every persisted raw JSONL session log (parent and subagent children, primary-first) after graceful stdin EOF. `AgentUnderTest` supplies absolute `binScript`, optional `libBinScript`, `configPath`, and `tsconfigPath` paths because the subprocess cwd is outside the repo; `workspaceParent` may move the generated child cwd from the platform temp directory when that grant is itself under test. Startup failures preserve captured agent stderr in the rejected diagnostic.
-- **Normalizers** — pure functions turning captured surfaces into stable text or portable fixtures: `normalizeStdout` (JSON-RPC ids → first-seen sequence; UUIDs and every native/JavaScript filesystem spelling of the generated cwd → tokens, longest-first; cwd-rooted separators selected as canonical `/` or host-native; doubles as the stdout-purity check), `normalizeSessionLog` (times zeroed, `seq` kept, the same cwd-path policy), `tokenizeSessionFixtureCwd` (the generated workspace and its filesystem aliases → one canonical `{{cwd}}`, including an already-tokenized macOS `/private` alias; authored temp paths unchanged), `scrubSystemPrompts` (prompt text → `{{system}}`), `scrubToolSchemas` (schema bulk → `{{tools}}`), `scrubRequestHeaders` (all header bulk → `{{system}}`/`{{tools}}`/`{{messagePrefix}}` outside each pin, structure kept — [pinned-header Agent Note](../../../.agents/notes/archived/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)), and `stabilizeFixtureMessageIds` (committed UUIDs carried into unchanged, mutually unique messages by structurally rewriting only complete surface and durable-inbox message ID fields across any recorder's fixture-ready parent/child logs).
+- **Normalizers** — pure functions turning captured surfaces into stable text or portable fixtures: `normalizeStdout` (JSON-RPC ids → first-seen sequence; UUIDs and every native/JavaScript filesystem spelling of the generated cwd → tokens, longest-first; cwd-rooted separators selected as canonical `/` or host-native; doubles as the stdout-purity check), `normalizeSessionLog` (sequence envelopes retained, times zeroed, the same cwd-path policy), `normalizeSessionSnapshot` (one parse pass combining session-log normalization, request-header scrubbing, and body-envelope projection for a committed fixture), `tokenizeSessionFixtureCwd` (the generated workspace and its filesystem aliases → one canonical `{{cwd}}`, including an already-tokenized macOS `/private` alias; authored temp paths unchanged), `scrubSystemPrompts` (prompt text → `{{system}}`), `scrubToolSchemas` (schema bulk → `{{tools}}`), `scrubRequestHeaders` (all header bulk → `{{system}}`/`{{tools}}`/`{{messagePrefix}}` outside each pin, structure kept — [pinned-header Agent Note](../../../.agents/notes/archived/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)), and `stabilizeFixtureMessageIds` (committed UUIDs carried into unchanged, mutually unique messages by structurally rewriting only complete surface and durable-inbox message ID fields across any recorder's fixture-ready parent/child logs).
 - **`defineAcpSnapshotSuite` (factory)** — registers the whole describe/it tree for a scenario table: per-scenario expected-output and re-persisted-log comparisons, record/refresh fixture write-back, rejection of structured `UNKNOWN_TOOL` results, a tokenized pin per header class composed with independently shared `system-prompt.expected.md` and `tool-schemas.expected.json` sidecars, and a live uniformity guard. Its fixture guards reject orphan scenario dirs, missing files, multiple pins for one class, duplicate sidecar content, noncanonical macOS-prefixed cwd tokens, unscrubbed JSONL headers, and malformed pinning headers. Before record or refresh writes fixtures, an unchanged complete message retains its committed UUID only when both its ID and identity-free fingerprint are unique across the scenario's fixture-ready parent/child logs; the session package's authoritative surface-type predicate selects surface carriers, correlated `agent/inbox/spliced` copies join the same mapping, and only validated `id` fields in those carriers are rewritten. New, changed, malformed, and graph-ambiguous messages keep fresh UUIDs. Refresh evaluates fresh leaves with the harvested run's ids, cwd, and every cwd alias, then reuses normalized-equivalent leaves only when the complete logical-record layout aligns and volatile string replacements form a bijection; complete message IDs in surface or inbox carriers are excluded because the later structural pass owns them, ambiguous logs keep fresh strings, and fresh semantic values remain authoritative. It also expands packed timing envelopes before aligning event times, so switching between packed and unpacked layouts cannot shift later records. A newly inserted `session/title` receives its preceding event's time so feature-driven insertions do not churn the remainder of a fixture. Each scenario directory's `session.jsonl` plus contiguous `session.<n>.jsonl` siblings are the ordered primary/child inventory; the scenario table does not duplicate their count. Must be called at vitest collection time.
 
-Committed session fixtures use canonical packed rows; the [temporary repository migrator](../../../scripts/migrate-packed-session-fixtures.ts) (`pnpm run migrate:packed-session-fixtures`) rewrites older fixture layouts, and its [removal proposal](../../../.agents/notes/proposed/process/2026-07-26-remove-packed-session-fixture-migrator.md) owns its deletion.
+Committed session fixtures retain their complete session header and event payloads but omit ordinary `seq`/`time` and packed-row `seq0`/`time0` envelopes. Replay synthesizes those envelopes in memory; runtime persistence remains unchanged. Fixtures also use canonical packed rows; the [temporary repository migrator](../../../scripts/migrate-packed-session-fixtures.ts) (`pnpm run migrate:packed-session-fixtures`) rewrites older fixture layouts, and its [removal proposal](../../../.agents/notes/proposed/process/2026-07-26-remove-packed-session-fixture-migrator.md) owns its deletion.
 
 A consuming `*.snapshot.ts` is the scenario table plus one factory call:
 
diff --git a/packages/test-support/acp-snapshot/README.zh.md b/packages/test-support/acp-snapshot/README.zh.md
index e92d3f17c6..b328d3dea4 100644
--- a/packages/test-support/acp-snapshot/README.zh.md
+++ b/packages/test-support/acp-snapshot/README.zh.md
@@ -8,10 +8,10 @@ ACP（Agent Client Protocol）快照套件工具包：无密钥快照层（`pnpm
 
 - **`launchAcpTestAgent`（启动器）**：从指定 cwd 在 tsx 下启动源 agent（智能体），或在普通 Node 下启动已构建 `lib` agent；通过原始字节 stdout tee 连接 SDK 客户端，收集会话更新和 stderr，在启动阶段报告异步 spawn 失败，默认拒绝未处理的权限请求，并负责优雅或带信号关闭。关闭会等待进程退出、继承 stdio 关闭和 ACP parser 耗尽，然后才完成关闭或传播子级错误，使捕获内容完整，且调用方可在任一结果后移除自有路径。当 Windows 接受强制终止但异步发布退出标记时，关闭会给该标记有界宽限，然后才将回退拒绝视为第二次失败。快照和普通 e2e 套件共享该进程边界；测试只需提供 agent 路径、cwd、环境覆盖和任何权限策略。
 - **`runScenario`（harness）**：通过启动器从确定性 `input.json` 脚本驱动 ACP JSON-RPC stdio，将原始 stdout tee 给预期输出和纯度检查，并在优雅 stdin EOF 后收集每个持久化原始 JSONL 会话日志（父会话和 subagent 子会话，主会话优先）。`AgentUnderTest` 提供绝对 `binScript`、可选 `libBinScript`、`configPath` 和 `tsconfigPath` 路径，因为子进程 cwd 位于仓库外。当生成子级 cwd 的授权本身是测试对象时，`workspaceParent` 可以将它从平台临时目录移出。启动失败会在拒绝诊断中保留已捕获 agent stderr。
-- **规范化器**：将已捕获内容转换为稳定文本或可移植 fixture 的纯函数：`normalizeStdout`（JSON-RPC id → 首次出现序列；UUID 以及生成 cwd 的每种原生／JavaScript 文件系统写法 → token，按最长优先；根据 cwd 的分隔符选择规范 `/` 或宿主原生形式；同时作为 stdout 纯度检查）、`normalizeSessionLog`（时间归零、保留 `seq`、使用同一 cwd 路径策略）、`tokenizeSessionFixtureCwd`（生成的 workspace 及其文件系统别名，包括已进行 token 化的 macOS `/private` 别名 → 单一规范 `{{cwd}}`；手工编写的临时路径保持不变）、`scrubSystemPrompts`（提示词文本 → `{{system}}`）、`scrubToolSchemas`（schema bulk → `{{tools}}`）、`scrubRequestHeaders`（每个 pin 之外的所有 header bulk → `{{system}}`/`{{tools}}`/`{{messagePrefix}}`，保留结构；见[header 固定 Agent Note](../../../.agents/notes/archived/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)）和 `stabilizeFixtureMessageIds`（针对任意录制器已准备写入 fixture 的父级/子级日志，通过结构化方式仅改写 surface 和持久 inbox 中完整消息的 ID 字段，将已提交 UUID 带入未变化且双向唯一匹配的消息）。
+- **规范化器**：将已捕获内容转换为稳定文本或可移植 fixture 的纯函数：`normalizeStdout`（JSON-RPC id → 首次出现序列；UUID 以及生成 cwd 的每种原生／JavaScript 文件系统写法 → token，按最长优先；根据 cwd 的分隔符选择规范 `/` 或宿主原生形式；同时作为 stdout 纯度检查）、`normalizeSessionLog`（保留序号 envelope、将时间归零，并使用同一 cwd 路径策略）、`normalizeSessionSnapshot`（通过一次解析完成会话日志规范化、request header 清理和签入 fixture 的正文 envelope 投影）、`tokenizeSessionFixtureCwd`（生成的 workspace 及其文件系统别名，包括已进行 token 化的 macOS `/private` 别名 → 单一规范 `{{cwd}}`；手工编写的临时路径保持不变）、`scrubSystemPrompts`（提示词文本 → `{{system}}`）、`scrubToolSchemas`（schema bulk → `{{tools}}`）、`scrubRequestHeaders`（每个 pin 之外的所有 header bulk → `{{system}}`/`{{tools}}`/`{{messagePrefix}}`，保留结构；见[header 固定 Agent Note](../../../.agents/notes/archived/testing/2026-07-06-pin-request-header-content-in-one-scenario.md)）和 `stabilizeFixtureMessageIds`（针对任意录制器已准备写入 fixture 的父级/子级日志，通过结构化方式仅改写 surface 和持久 inbox 中完整消息的 ID 字段，将已提交 UUID 带入未变化且双向唯一匹配的消息）。
 - **`defineAcpSnapshotSuite`（工厂）**：为场景表注册完整 describe/it 树：每场景预期输出与重新持久化日志比较、录制/刷新 fixture 回写、拒绝结构化 `UNKNOWN_TOOL` 结果、每个 header 类别一个 token 化 pin（由可独立共享的 `system-prompt.expected.md` 和 `tool-schemas.expected.json` 伴随文件组合而成），以及实时一致性保护。其 fixture 保护会拒绝遗留场景目录、缺失文件、一个类别包含多个 pin、重复的伴随文件内容、带非规范 macOS 前缀的 cwd token、未擦除的 JSONL header，以及格式错误的 pin header。在录制或刷新模式写入 fixture 前，仅当一条未变化完整消息的 ID 及其去除身份后的指纹在场景可写入 fixture 的父级/子级日志中均唯一时，该消息才会保留已提交的 UUID；会话包的权威 surface 类型谓词负责选择 surface 载体，与其关联的 `agent/inbox/spliced` 副本也纳入同一映射，且仅改写这些载体中通过验证的 `id` 字段。新增、发生变化、格式错误以及图关系存在歧义的消息保留本次生成的 UUID。刷新会使用收集所得本次运行的 id、cwd 及全部 cwd 别名评估本次生成的叶值；只有完整逻辑记录布局对齐且易变字符串替换形成双射时，才会复用归一化后等价的叶值；surface 或 inbox 载体中的完整消息 ID 不参与此路径，因为后续结构化处理负责这些 ID；有歧义的日志保留本次生成的字符串，而本次生成的语义值仍为权威数据。它还会在对齐事件时间前展开打包时序 envelope，因此切换打包/非打包布局无法移动后续记录。新插入的 `session/title` 使用前一个事件的时间，因此功能驱动的插入不会扰动 fixture 余下部分。每个场景目录的 `session.jsonl` 和连续 `session.<n>.jsonl` 同级文件构成有序的主会话／子会话清单；场景表不重复其数量。必须在 vitest 收集时调用。
 
-签入仓库的会话 fixture 使用规范打包行；[临时仓库迁移器](../../../scripts/migrate-packed-session-fixtures.ts)（`pnpm run migrate:packed-session-fixtures`）会改写较旧的 fixture 布局，由其[移除提案](../../../.agents/notes/proposed/process/2026-07-26-remove-packed-session-fixture-migrator.md)负责删除该迁移器。
+签入仓库的会话 fixture 保留完整会话 header 和事件 payload，但省略普通行的 `seq`/`time` 与打包行的 `seq0`/`time0` envelope。回放只在内存中合成这些 envelope；运行时持久化不变。fixture 同时使用规范打包行；[临时仓库迁移器](../../../scripts/migrate-packed-session-fixtures.ts)（`pnpm run migrate:packed-session-fixtures`）会改写较旧的 fixture 布局，由其[移除提案](../../../.agents/notes/proposed/process/2026-07-26-remove-packed-session-fixture-migrator.md)负责删除该迁移器。
 
 消费方 `*.snapshot.ts` 就是场景表加一次工厂调用：
 
diff --git a/packages/test-support/acp-snapshot/package.json b/packages/test-support/acp-snapshot/package.json
index d8ca0bcfe4..f7bd804b26 100644
--- a/packages/test-support/acp-snapshot/package.json
+++ b/packages/test-support/acp-snapshot/package.json
@@ -38,11 +38,13 @@
   },
   "peerDependencies": {
     "@deepseek-ai/dsh-invariants": "workspace:^",
+    "@deepseek-ai/dsh-llm-replay": "workspace:^",
     "@deepseek-ai/dsh-session": "workspace:^",
     "@deepseek-ai/cordis": "workspace:^"
   },
   "devDependencies": {
     "@deepseek-ai/dsh-invariants": "workspace:^",
+    "@deepseek-ai/dsh-llm-replay": "workspace:^",
     "@deepseek-ai/dsh-session": "workspace:^",
     "@deepseek-ai/cordis": "workspace:^"
   }
diff --git a/packages/test-support/acp-snapshot/src/index.ts b/packages/test-support/acp-snapshot/src/index.ts
index 6d8f5c0953..f3eacfd378 100644
--- a/packages/test-support/acp-snapshot/src/index.ts
+++ b/packages/test-support/acp-snapshot/src/index.ts
@@ -34,8 +34,10 @@ export {
 export {
   extractSnapshotSpillPaths,
   normalizeSessionLog,
+  normalizeSessionSnapshot,
   normalizeStdout,
   scrubRequestHeaders,
+  scrubSessionSnapshot,
   scrubSystemPrompts,
   scrubToolSchemas,
   tokenizeSessionFixtureCwd,
@@ -43,6 +45,7 @@ export {
   type NormalizeContext,
   type NormalizeOptions,
 } from './normalize.ts'
+export { projectSessionSnapshot } from '@deepseek-ai/dsh-llm-replay'
 export {
   defineAcpSnapshotSuite,
   refreshFixtureReplacements,
diff --git a/packages/test-support/acp-snapshot/src/normalize.ts b/packages/test-support/acp-snapshot/src/normalize.ts
index a3d5e66aa1..8f99d382aa 100644
--- a/packages/test-support/acp-snapshot/src/normalize.ts
+++ b/packages/test-support/acp-snapshot/src/normalize.ts
@@ -1,11 +1,17 @@
 /**
  * Pure ACP transcript and session-log normalizers. They scrub session ids, run cwd, RPC ids,
- * timestamps, and hook duration while preserving deterministic event sequence numbers.
+ * timestamps and hook duration while preserving event payloads.
  * Request-header scrubbers stay composable so one scenario per header class can pin prompt and
  * tool-schema sidecars.
  * @module @deepseek-ai/dsh-acp-snapshot/normalize
  */
 
+import {
+  decodeSessionSnapshotBody,
+  isPackedSessionChunkRow,
+  omitSessionEventEnvelope,
+} from '@deepseek-ai/dsh-llm-replay'
+
 const SESSION_ID = '{{sessionId}}'
 const CWD = '{{cwd}}'
 const SYSTEM = '{{system}}'
@@ -282,10 +288,12 @@ export function normalizeStdout(
 
 /**
  * Normalize a session JSONL log into a stable expected output: the header line's
- * volatile fields (`createdAt`, `id`, `cwd`) and every event's `time` are
- * zeroed/scrubbed, all volatile strings scrubbed, and `seq` is LEFT INTACT
- * (deterministic by contract). A packed chunk row's timing (`time0`, the `dt`
- * gaps) zeroes just like an event `time`; its `seq0` stays, like `seq`.
+ * volatile fields (`createdAt`, `id`, `cwd`) are zeroed/scrubbed, ordinary
+ * event `time` and packed-row `time0` values are zeroed, and all volatile
+ * strings are scrubbed. A projected session fixture has its sequence/time
+ * envelopes materialized in the parsed objects before normalization. Packed
+ * `data.dt` gaps remain normalized because they carry the same wall-clock noise
+ * as their `time0` anchor.
  * Output is JSONL in the same shape as the input — one compact record per
  * line.
  *
@@ -301,32 +309,70 @@ export function normalizeSessionLog(
 ): string {
   const cwdPathMode = options.cwdPathMode ?? 'canonical'
   const lines = rawLog.split('\n').filter(line => line.trim().length > 0)
-  const records = lines.map((line) => {
-    const record = JSON.parse(line) as Record<string, unknown>
-    // Header line: { type: 'session', createdAt, id, cwd, … }.
-    if (record.type === 'session') {
-      if ('createdAt' in record) record.createdAt = 0
-    } else if ('time0' in record) {
-      // Packed chunk row: zero the anchor timestamp and every member gap.
-      record.time0 = 0
-      const data = record.data
-      if (data !== null && typeof data === 'object' && Array.isArray((data as { dt?: unknown }).dt)) {
-        (data as { dt: unknown[] }).dt = (data as { dt: unknown[] }).dt.map(() => 0)
-      }
-    } else if ('time' in record) {
-      // Event line: zero the epoch-ms timestamp; keep seq (deterministic).
-      record.time = 0
-      // A hook/result carries the hook's wall-clock runtime (`data.durationMs`),
-      // which is run-to-run noise like `time` — zero it so the expected output reflects
-      // the hook's decision/exit, not how long the shell took.
-      if (record.type === 'hook/result' && record.data !== null && typeof record.data === 'object') {
-        const data = record.data as Record<string, unknown>
-        if ('durationMs' in data) data.durationMs = 0
-      }
+  const records = lines.map(line => JSON.parse(line) as Record<string, unknown>)
+  if (records[0]?.type === 'session') decodeSessionSnapshotBody(records.slice(1))
+  const normalized = records.map(record => normalizeSessionRecord(record, ctx, cwdPathMode))
+  return normalized.map(r => JSON.stringify(r)).join('\n') + '\n'
+}
+
+/** Normalize one already-parsed session or stream record in place. */
+function normalizeSessionRecord(
+  record: Record<string, unknown>,
+  ctx: NormalizeContext,
+  cwdPathMode: CwdPathMode,
+): Record<string, unknown> {
+  // Header line: { type: 'session', createdAt, id, cwd, … }.
+  if (record.type === 'session') {
+    if ('createdAt' in record) record.createdAt = 0
+  } else if (isPackedSessionChunkRow(record)) {
+    if ('time0' in record) record.time0 = 0
+    const data = record.data
+    if (data !== null && typeof data === 'object' && Array.isArray((data as { dt?: unknown }).dt)) {
+      (data as { dt: unknown[] }).dt = (data as { dt: unknown[] }).dt.map(() => 0)
     }
-    return scrubValue(record, ctx, cwdPathMode) as Record<string, unknown>
-  })
-  return records.map(r => JSON.stringify(r)).join('\n') + '\n'
+  } else if ('time' in record) {
+    record.time = 0
+  }
+  // A hook/result carries the hook's wall-clock runtime (`data.durationMs`),
+  // which is run-to-run noise like `time` — zero it so the expected output reflects
+  // the hook's decision/exit, not how long the shell took.
+  if (record.type === 'hook/result' && record.data !== null && typeof record.data === 'object') {
+    const data = record.data as Record<string, unknown>
+    if ('durationMs' in data) data.durationMs = 0
+  }
+  return scrubValue(record, ctx, cwdPathMode) as Record<string, unknown>
+}
+
+/**
+ * Normalize and project persisted session JSONL for a committed fixture.
+ * Each non-empty line is parsed once; body records are normalized, request
+ * headers are tokenized, and persistence-only envelopes are omitted before
+ * the record is serialized.
+ *
+ * @param rawLog - persisted or already-projected session JSONL.
+ * @param ctx - the run's volatile values to scrub.
+ * @param options - separator output controls.
+ * @returns normalized committed session snapshot JSONL.
+ */
+export function normalizeSessionSnapshot(
+  rawLog: string,
+  ctx: NormalizeContext,
+  options: NormalizeOptions = {},
+): string {
+  const cwdPathMode = options.cwdPathMode ?? 'canonical'
+  let recordIndex = 0
+  return rawLog.split('\n').map((line) => {
+    if (line.trim().length === 0) return line
+    const parsed = JSON.parse(line) as Record<string, unknown>
+    const record = normalizeSessionRecord(parsed, ctx, cwdPathMode)
+    if (recordIndex++ === 0) {
+      if (record.type !== 'session') throw new Error('session snapshot must start with a session header')
+      return JSON.stringify(record)
+    }
+    scrubRequestHeaderRecord(record, { system: true, tools: true })
+    omitSessionEventEnvelope(record)
+    return JSON.stringify(record)
+  }).join('\n')
 }
 
 /**
@@ -373,6 +419,29 @@ export function scrubRequestHeaders(rawLog: string): string {
   return scrubHeaderContent(rawLog, { system: true, tools: true })
 }
 
+/**
+ * Project a persisted session log while tokenizing all request-header bulk.
+ * Each non-empty line is parsed at most once; the session header stays
+ * byte-identical and body payloads are changed only by header tokenization.
+ *
+ * @param rawLog - persisted or already-projected session JSONL.
+ * @returns committed snapshot JSONL with request headers tokenized.
+ */
+export function scrubSessionSnapshot(rawLog: string): string {
+  let recordIndex = 0
+  return rawLog.split('\n').map((line) => {
+    if (line.trim().length === 0) return line
+    const record = JSON.parse(line) as Record<string, unknown>
+    if (recordIndex++ === 0) {
+      if (record.type !== 'session') throw new Error('session snapshot must start with a session header')
+      return line
+    }
+    omitSessionEventEnvelope(record)
+    scrubRequestHeaderRecord(record, { system: true, tools: true })
+    return JSON.stringify(record)
+  }).join('\n')
+}
+
 /** Which independent request-header payloads a scrubber replaces. */
 interface HeaderScrubOptions {
   system?: boolean
@@ -385,17 +454,20 @@ function scrubHeaderContent(rawLog: string, options: HeaderScrubOptions): string
   const out = lines.map((line) => {
     if (line.trim().length === 0) return line
     const record = JSON.parse(line) as Record<string, unknown>
-    const data = record.data as Record<string, unknown> | null | undefined
-    if (data === null || typeof data !== 'object') return line
-    if (record.type === 'request/header') {
-      const header = data.header as Record<string, unknown> | null | undefined
-      if (header === null || typeof header !== 'object') return line
-      let touched = false
-      if (options.system === true && 'system' in header) { header.system = SYSTEM; touched = true }
-      if (options.tools === true && 'tools' in header) { header.tools = TOOLS; touched = true }
-      return touched ? JSON.stringify(record) : line
-    }
-    return line
+    return scrubRequestHeaderRecord(record, options) ? JSON.stringify(record) : line
   })
   return out.join('\n')
 }
+
+/** Tokenize selected request-header fields on one parsed record. */
+function scrubRequestHeaderRecord(record: Record<string, unknown>, options: HeaderScrubOptions): boolean {
+  if (record.type !== 'request/header') return false
+  const data = record.data as Record<string, unknown> | null | undefined
+  if (data === null || typeof data !== 'object') return false
+  const header = data.header as Record<string, unknown> | null | undefined
+  if (header === null || typeof header !== 'object') return false
+  let touched = false
+  if (options.system === true && 'system' in header) { header.system = SYSTEM; touched = true }
+  if (options.tools === true && 'tools' in header) { header.tools = TOOLS; touched = true }
+  return touched
+}
diff --git a/packages/test-support/acp-snapshot/src/suite.ts b/packages/test-support/acp-snapshot/src/suite.ts
index 1728671c3a..2c419040c0 100644
--- a/packages/test-support/acp-snapshot/src/suite.ts
+++ b/packages/test-support/acp-snapshot/src/suite.ts
@@ -21,6 +21,7 @@ import { readFile, readdir, rm, writeFile } from 'node:fs/promises'
 import { existsSync } from 'node:fs'
 import { join } from 'node:path'
 import { isSurfaceEligibleType } from '@deepseek-ai/dsh-session/surface'
+import { decodeSessionSnapshot } from '@deepseek-ai/dsh-llm-replay'
 import { describe, expect, it } from 'vitest'
 import { type AgentUnderTest, type HarvestedLog, type InputScript, runScenario } from './harness.ts'
 import {
@@ -30,6 +31,7 @@ import {
   normalizeSessionLog,
   normalizeStdout,
   scrubRequestHeaders,
+  scrubSessionSnapshot,
   scrubSystemPrompts,
   scrubToolSchemas,
   tokenizeSessionFixtureCwd,
@@ -1031,7 +1033,8 @@ export function stabilizeRefreshLog(
 ): string {
   const freshRecords = parseJsonlRecords(fresh)
   const stable = applyFixtureReplacements(fresh, replacements)
-  const existingRecords = logicalRecords(parseJsonlRecords(existing))
+  const decodedExisting = decodeSessionSnapshot(existing)
+  const existingRecords = logicalRecords([decodedExisting.header, ...decodedExisting.bodyRecords])
   const records = parseJsonlRecords(stable)
   const existingContext = fixtureContext(existing)
   const stringMappings = normalizedStringMappings(
@@ -1220,9 +1223,7 @@ export function defineAcpSnapshotSuite(options: SnapshotSuiteOptions): void {
 
         // Record writes live model fixtures; keyless refresh writes every comparable replayed
         // fixture. Pinning JSONL keeps prefixes but moves prompts and schemas into sidecars.
-        const scrub = scenario.pinsHeader === true
-          ? (log: string): string => scrubToolSchemas(scrubSystemPrompts(log))
-          : scrubRequestHeaders
+        const scrub = scrubSessionSnapshot
         const portableFixture = scenario.workspaceParent === undefined
           ? tokenizeSessionFixtureCwd
           : (log: string): string => log
@@ -1245,14 +1246,14 @@ export function defineAcpSnapshotSuite(options: SnapshotSuiteOptions): void {
           const refreshReplacements = REFRESHING
             ? refreshFixtureReplacements(result.sessionLogs, existingFixtures)
             : []
-          const freshFixtures = REFRESHING
+          const freshFixtures = (REFRESHING
             ? result.sessionLogs.map((log, index) => scrub(portableFixture(stabilizeRefreshLog(
               log.content,
               existingFixtures[index] as string,
               refreshReplacements,
               ctx,
             ))))
-            : result.sessionLogs.map(log => scrub(portableFixture(log.content)))
+            : result.sessionLogs.map(log => scrub(portableFixture(log.content))))
           const outputFixtures = stabilizeFixtureMessageIds(freshFixtures, existingFixtures)
           await Promise.all(outputFixtures.map((fixture, index) =>
             writeFile(join(dir, outputFixtureFiles[index] as string), fixture)))
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-child/session.1.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-child/session.1.jsonl
index 384b3954cf..00292b57b8 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-child/session.1.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-child/session.1.jsonl
@@ -1,3 +1,3 @@
 {"type":"session","id":"abababab-cdcd-4efe-8ada-badabadabada","createdAt":800,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-KBQJbW","parentSession":"f6fa7fcf-dd9c-4b39-8815-b25ddcebfd88","delegationDepth":1}
-{"type":"request/header","seq":0,"time":2,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"user/message","seq":1,"time":5,"data":{"role":"user","content":[{"type":"text","text":"same inherited message"}],"source":{"kind":"user"},"id":"22222222-2222-4222-8222-222222222222"},"surfaceOp":"append"}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"user/message","data":{"role":"user","content":[{"type":"text","text":"same inherited message"}],"source":{"kind":"user"},"id":"22222222-2222-4222-8222-222222222222"},"surfaceOp":"append"}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-child/session.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-child/session.jsonl
index 0ffe7f9f5f..0e73443adf 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-child/session.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-child/session.jsonl
@@ -1,3 +1,3 @@
 {"type":"session","id":"f6fa7fcf-dd9c-4b39-8815-b25ddcebfd88","createdAt":700,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-KBQJbW","delegationDepth":0}
-{"type":"request/header","seq":0,"time":3,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"user/message","seq":1,"time":5,"data":{"role":"user","content":[{"type":"text","text":"same inherited message"}],"source":{"kind":"user"},"id":"22222222-2222-4222-8222-222222222222"},"surfaceOp":"append"}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"user/message","data":{"role":"user","content":[{"type":"text","text":"same inherited message"}],"source":{"kind":"user"},"id":"22222222-2222-4222-8222-222222222222"},"surfaceOp":"append"}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-pin/session.1.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-pin/session.1.jsonl
index 1caf2610b3..3022d0f070 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-pin/session.1.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-pin/session.1.jsonl
@@ -1,2 +1,2 @@
 {"type":"session","id":"abababab-cdcd-4efe-8ada-badabadabada","createdAt":800,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-KBQJbW","parentSession":"f6fa7fcf-dd9c-4b39-8815-b25ddcebfd88"}
-{"type":"request/header","seq":0,"time":2,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-pin/session.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-pin/session.jsonl
index 40bb4d37dc..3f3c253101 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-pin/session.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/record-suite/rec-pin/session.jsonl
@@ -1,2 +1,2 @@
 {"type":"session","id":"ccdc749f-56f3-4267-9750-598b5c60b7b2","createdAt":600,"cwd":"/var/folders/2g/b32ct0qn1d728l_v6tdkjytr0000gn/T/acp-snap-cwd-nOQ4Gy","delegationDepth":0}
-{"type":"request/header","seq":0,"time":4,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/suite/authored-error/session.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/suite/authored-error/session.jsonl
index a202c7141d..7de48a3768 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/suite/authored-error/session.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/suite/authored-error/session.jsonl
@@ -1,2 +1,2 @@
 {"type":"session","id":"44444444-3333-4222-8111-000000000000","createdAt":17,"cwd":"/rec/authored-cwd","delegationDepth":0}
-{"type":"turn/end","seq":1,"time":17,"data":{"error":"model exploded"}}
+{"type":"turn/end","data":{"error":"model exploded"}}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/suite/blocked-log/session.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/suite/blocked-log/session.jsonl
index 75eb18fa71..a55b440570 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/suite/blocked-log/session.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/suite/blocked-log/session.jsonl
@@ -1,2 +1,2 @@
 {"type":"session","id":"99999999-8888-4777-8666-555555555555","createdAt":13,"cwd":"/rec/blocked-cwd","delegationDepth":0}
-{"type":"hook/result","seq":1,"time":13,"data":{"decision":"block","durationMs":99}}
+{"type":"hook/result","data":{"decision":"block","durationMs":99}}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/suite/pin-turn/session.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/suite/pin-turn/session.jsonl
index 693e728d2c..c5a48ce7eb 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/suite/pin-turn/session.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/suite/pin-turn/session.jsonl
@@ -1,4 +1,4 @@
 {"type":"session","id":"12121212-3434-4545-8686-787878787878","createdAt":7,"cwd":"/rec/pin-cwd","delegationDepth":0}
-{"type":"request/header","seq":0,"time":7,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/header","seq":1,"time":7,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"change"}}
-{"type":"turn/start","seq":2,"time":7,"data":{"turn":1}}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"change"}}
+{"type":"turn/start","data":{"turn":1}}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/suite/plain-turn/session.1.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/suite/plain-turn/session.1.jsonl
index 5fb01dbe8a..4a99404db1 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/suite/plain-turn/session.1.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/suite/plain-turn/session.1.jsonl
@@ -1,2 +1,2 @@
 {"type":"session","id":"eeeeeeee-1111-4222-8333-444444444444","createdAt":12,"cwd":"/rec/plain-cwd","parentSession":"56565656-7878-4989-8a9a-9b9b9b9b9b9b","delegationDepth":1}
-{"type":"request/header","seq":0,"time":12,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/suite/plain-turn/session.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/suite/plain-turn/session.jsonl
index 6bdf784ce2..a8ef50bdd7 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/suite/plain-turn/session.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/suite/plain-turn/session.jsonl
@@ -1,3 +1,3 @@
 {"type":"session","id":"56565656-7878-4989-8a9a-9b9b9b9b9b9b","createdAt":11,"cwd":"/rec/plain-cwd","delegationDepth":0}
-{"type":"request/header","seq":0,"time":11,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"assistant/chunk","seq":1,"time":11,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"hi"}}}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"hi"}}}
diff --git a/packages/test-support/acp-snapshot/tests/fixtures/suite/shared-pin/session.jsonl b/packages/test-support/acp-snapshot/tests/fixtures/suite/shared-pin/session.jsonl
index 8a9407cbc0..87329aa45b 100644
--- a/packages/test-support/acp-snapshot/tests/fixtures/suite/shared-pin/session.jsonl
+++ b/packages/test-support/acp-snapshot/tests/fixtures/suite/shared-pin/session.jsonl
@@ -1,4 +1,4 @@
 {"type":"session","id":"13131313-3434-4545-8686-787878787878","createdAt":7,"cwd":"/rec/shared-pin-cwd","delegationDepth":0}
-{"type":"request/header","seq":0,"time":7,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/header","seq":1,"time":7,"data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"change"}}
-{"type":"turn/start","seq":2,"time":7,"data":{"turn":1}}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/header","data":{"header":{"config":{"model":"fake"},"system":"{{system}}","tools":"{{tools}}"},"reason":"change"}}
+{"type":"turn/start","data":{"turn":1}}
diff --git a/packages/test-support/acp-snapshot/tests/normalize.spec.ts b/packages/test-support/acp-snapshot/tests/normalize.spec.ts
index aea21eb747..841815189e 100644
--- a/packages/test-support/acp-snapshot/tests/normalize.spec.ts
+++ b/packages/test-support/acp-snapshot/tests/normalize.spec.ts
@@ -3,8 +3,10 @@ import {
   type NormalizeContext,
   extractSnapshotSpillPaths,
   normalizeSessionLog,
+  normalizeSessionSnapshot,
   normalizeStdout,
   scrubRequestHeaders,
+  scrubSessionSnapshot,
   scrubSystemPrompts,
   scrubToolSchemas,
   tokenizeSessionFixtureCwd,
@@ -218,13 +220,20 @@ describe('normalizeSessionLog', () => {
     expect(out).not.toContain('123')
   })
 
-  it('zeroes each event time but keeps seq', () => {
+  it('preserves event sequence and zeroes event time', () => {
     const out = normalizeSessionLog(`${header({})}\n${event({ seq: 7, time: 999 })}\n`, ctx)
     expect(out).toContain('"time":0')
-    expect(out).toContain('"seq":7') // seq is deterministic — NOT scrubbed
+    expect(out).toContain('"seq":7')
     expect(out).not.toContain('999')
   })
 
+  it('materializes a projected event envelope in the same parse pass', () => {
+    const projected = JSON.stringify({ type: 'turn/start', data: { turn: 1 } })
+    const out = normalizeSessionLog(`${header({})}\n${projected}\n`, ctx)
+    expect(out).toContain('"seq":0')
+    expect(out).toContain('"time":0')
+  })
+
   it('scrubs cwd and session id deep inside event data', () => {
     const ev = JSON.stringify({
       type: 'tool/result', seq: 2, time: 5,
@@ -370,7 +379,7 @@ describe('normalizeSessionLog', () => {
     expect(out).toContain('"decision":"block"') // the decision is the behavior — kept
   })
 
-  it('zeroes a packed chunk row\'s time0 and dt gaps but keeps seq0 and payload', () => {
+  it('preserves a packed chunk row\'s sequence, zeroes time, and zeroes volatile dt gaps', () => {
     const row = JSON.stringify({
       type: 'text-chunks', seq0: 7, time0: 999,
       data: { turn: 1, step: 1, index: 0, dt: [212, 27, 0], texts: ['a', 'b', 'c', 'd'] },
@@ -378,17 +387,17 @@ describe('normalizeSessionLog', () => {
     const out = normalizeSessionLog(`${header({})}\n${row}\n`, ctx)
     expect(out).toContain('"time0":0')
     expect(out).toContain('"dt":[0,0,0]')
-    expect(out).toContain('"seq0":7') // seq0 is deterministic, like seq — NOT scrubbed
+    expect(out).toContain('"seq0":7')
     expect(out).toContain('"texts":["a","b","c","d"]')
     expect(out).not.toContain('999')
     expect(out).not.toContain('212')
   })
 
-  it('zeroes time0 even when a malformed row carries no dt array', () => {
+  it('normalizes a headerless packed-like stream record without decoding it', () => {
     const row = JSON.stringify({ type: 'text-chunks', seq0: 1, time0: 999, data: 'not-an-object' })
-    const out = normalizeSessionLog(`${header({})}\n${row}\n`, ctx)
+    const out = normalizeSessionLog(`${row}\n`, ctx)
+    expect(out).toContain('"seq0":1')
     expect(out).toContain('"time0":0')
-    expect(out).not.toContain('999')
   })
 
   it('leaves a non-hook event durationMs untouched (only hook/result is scrubbed)', () => {
@@ -397,18 +406,50 @@ describe('normalizeSessionLog', () => {
     expect(out).toContain('"durationMs":88')
   })
 
-  it('tolerates records missing the volatile fields it would zero', () => {
+  it('handles complete envelopes when optional normalized fields are absent', () => {
     const bareHeader = JSON.stringify({ type: 'session', id: 's' })
-    const timeless = JSON.stringify({ type: 'note', seq: 1 })
     const bareHook = JSON.stringify({ type: 'hook/result', seq: 2, time: 5, data: { decision: 'allow' } })
     const nullDataHook = JSON.stringify({ type: 'hook/result', seq: 3, time: 6, data: null })
-    const out = normalizeSessionLog(`${bareHeader}\n${timeless}\n${bareHook}\n${nullDataHook}\n`, ctx)
-    expect(out).toContain('"type":"note","seq":1')
+    const out = normalizeSessionLog(`${bareHeader}\n${bareHook}\n${nullDataHook}\n`, ctx)
     expect(out).toContain('"decision":"allow"')
     expect(out).not.toContain('durationMs')
   })
 })
 
+describe('normalizeSessionSnapshot', () => {
+  it('normalizes, scrubs, and projects each parsed body record', () => {
+    const raw = [
+      JSON.stringify({ type: 'session', version: 0, createdAt: 123, cwd: ctx.cwd }),
+      JSON.stringify({
+        type: 'request/header',
+        seq: 7,
+        time: 999,
+        data: { header: { system: 'volatile', tools: [{ name: 'tool' }] } },
+      }),
+    ].join('\n') + '\n'
+    expect(normalizeSessionSnapshot(raw, ctx)).toBe([
+      JSON.stringify({ type: 'session', version: 0, createdAt: 0, cwd: '{{cwd}}' }),
+      JSON.stringify({ type: 'request/header', data: { header: { system: '{{system}}', tools: '{{tools}}' } } }),
+    ].join('\n') + '\n')
+  })
+
+  it('normalizes an already-projected packed row', () => {
+    const raw = [
+      JSON.stringify({ type: 'session', version: 0 }),
+      JSON.stringify({
+        type: 'text-chunks',
+        data: { turn: 1, step: 1, index: 0, dt: [9], texts: ['a', 'b'] },
+      }),
+    ].join('\n') + '\n'
+    expect(normalizeSessionSnapshot(raw, ctx)).toContain('"dt":[0]')
+  })
+
+  it('rejects headerless input', () => {
+    expect(() => normalizeSessionSnapshot('{"type":"turn/start"}\n', ctx))
+      .toThrow('session snapshot must start with a session header')
+  })
+})
+
 describe('tokenizeSessionFixtureCwd', () => {
   it.each([
     {
@@ -565,6 +606,32 @@ describe('scrubRequestHeaders', () => {
   })
 })
 
+describe('scrubSessionSnapshot', () => {
+  it('preserves the header while projecting and scrubbing each body record', () => {
+    const header = '  {"type":"session","version":0,"id":"s","createdAt":7}  '
+    const request = JSON.stringify({
+      type: 'request/header', seq: 0, time: 9,
+      data: { header: { system: 'secret', tools: [{ name: 'read' }] }, reason: 'initial' },
+    })
+    const event = JSON.stringify({
+      type: 'turn/start', seq: 1, time: 10,
+      data: { turn: 1, seq: 41, time: 42 },
+    })
+
+    expect(scrubSessionSnapshot(`${header}\n${request}\n${event}\n`)).toBe([
+      header,
+      '{"type":"request/header","data":{"header":{"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}',
+      '{"type":"turn/start","data":{"turn":1,"seq":41,"time":42}}',
+      '',
+    ].join('\n'))
+  })
+
+  it('rejects headerless input', () => {
+    expect(() => scrubSessionSnapshot('{"type":"turn/start"}\n'))
+      .toThrow('session snapshot must start with a session header')
+  })
+})
+
 describe('scrubSystemPrompts', () => {
   it('scrubs only system prompt payloads while keeping tools verbatim', () => {
     const header = JSON.stringify({
diff --git a/packages/test-support/acp-snapshot/tests/suite.spec.ts b/packages/test-support/acp-snapshot/tests/suite.spec.ts
index 8f072bc2e5..d8e7892b92 100644
--- a/packages/test-support/acp-snapshot/tests/suite.spec.ts
+++ b/packages/test-support/acp-snapshot/tests/suite.spec.ts
@@ -932,6 +932,25 @@ describe('stabilizeRefreshLog', () => {
     ].join('\n'))
   })
 
+  it('reads projected packed fixtures while retaining their data gaps', () => {
+    const fresh = [
+      '{"type":"session","id":"same","createdAt":200}',
+      '{"type":"text-chunks","seq0":2,"time0":200,"data":{"turn":1,"step":1,"index":0,"dt":[5,7],"texts":["new",""," split"]}}',
+      '',
+    ].join('\n')
+    const existing = [
+      '{"type":"session","id":"same","createdAt":100}',
+      '{"type":"text-chunks","data":{"turn":1,"step":1,"index":0,"dt":[1,2],"texts":["old","chunk","shape"]}}',
+      '',
+    ].join('\n')
+
+    expect(stabilize(fresh, existing)).toBe([
+      '{"type":"session","id":"same","createdAt":100}',
+      '{"type":"text-chunks","seq0":2,"time0":0,"data":{"turn":1,"step":1,"index":0,"dt":[1,2],"texts":["new",""," split"]}}',
+      '',
+    ].join('\n'))
+  })
+
   it.each([
     ['the old run is absent', [], 200],
     ['the old run is shorter', [100, 101], 100],
@@ -1069,7 +1088,7 @@ describe('stabilizeRefreshLog', () => {
     const existing = [
       '{"type":"session","id":"old-child","createdAt":100,"cwd":"/old","parentSession":"old-parent","seedLength":5}',
       '{"type":"hook/result","seq":1,"time":11,"data":{"decision":"stale","durationMs":99}}',
-      '{"type":"turn/end","seq":2,"data":{"error":"stale"}}',
+      '{"type":"turn/end","seq":2,"time":12,"data":{"error":"stale"}}',
       '{"type":"assistant/message","seq":3,"time":12,"data":{"text":"different type"}}',
       '{"type":"hook/result","seq":4,"time":13,"data":{"decision":"stale"}}',
       '',
@@ -1082,7 +1101,7 @@ describe('stabilizeRefreshLog', () => {
     ])).toBe([
       '{"type":"session","id":"old-child","createdAt":100,"cwd":"/old","parentSession":"old-parent","seedLength":1}',
       '{"type":"hook/result","seq":1,"time":11,"data":{"decision":"block","durationMs":99}}',
-      '{"type":"turn/end","seq":2,"time":33,"data":{"error":"fresh error"}}',
+      '{"type":"turn/end","seq":2,"time":12,"data":{"error":"fresh error"}}',
       '{"type":"tool/result","seq":3,"time":44,"data":{"text":"old-parent in /old"}}',
       '{"type":"hook/result","seq":4,"time":13,"data":{"decision":"allow","durationMs":5}}',
       '',
diff --git a/packages/test-support/acp-snapshot/tsconfig.json b/packages/test-support/acp-snapshot/tsconfig.json
index 5c4fa7d80a..7beb12554f 100644
--- a/packages/test-support/acp-snapshot/tsconfig.json
+++ b/packages/test-support/acp-snapshot/tsconfig.json
@@ -14,6 +14,9 @@
     {
       "path": "../../runtime-diagnostics/invariants"
     },
+    {
+      "path": "../llm-replay"
+    },
     {
       "path": "../../core/session"
     }
diff --git a/packages/test-support/llm-replay/README.i18n.yaml b/packages/test-support/llm-replay/README.i18n.yaml
index 8e84398842..a0a7fbd9b7 100644
--- a/packages/test-support/llm-replay/README.i18n.yaml
+++ b/packages/test-support/llm-replay/README.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/test-support/llm-replay/README.md
-README.md: 24ee2684ad5ff393b95db0075950fe40bce2e0dd
-README.zh.md: 5adb16e08604081ebc8db4e07a8a22c031d02ae2
+README.md: dd28102da4ba3c7f9af593bac3c5ca363bfa1752
+README.zh.md: 96e2713b1d147503f1150f5d74b9cd605887d9ee
diff --git a/packages/test-support/llm-replay/README.md b/packages/test-support/llm-replay/README.md
index 24ee2684ad..dd28102da4 100644
--- a/packages/test-support/llm-replay/README.md
+++ b/packages/test-support/llm-replay/README.md
@@ -8,7 +8,7 @@ Its consumers are the ACP and headless `stream-json` snapshot suites plus the We
 
 ## How the fixture works
 
-The fixture IS the persisted session log (`<scenario>/session.jsonl`). Its `assistant/chunk` events carry every `StreamChunk`, so grouping them by `(turn, step)` reconstructs each agent-loop `stream()` call's chunk sequence. A successful compaction summarizer is logged differently: when `compaction/summary` carries `llmStreamCall: true` and its complete `rawOutput`, replay reconstructs a canonical successful stream at that event's position using one `block-start`/`block-end` pair per block, the recorded usage when present, and a terminal `stop`. Exact provider delta partitioning is not part of the durable compaction result. `rawOutput` without the marker does not imply a local LLM call because template and remote summarizers may retain complete output without using this context's adapter.
+The fixture is a projection of a persisted session log (`<scenario>/session.jsonl`): it keeps the header and every event payload, but omits body `seq`/`time` envelopes (`seq0`/`time0` for packed rows). Replay restores contiguous synthetic envelopes while parsing; runtime persistence still writes the complete log. The fixture's `assistant/chunk` events carry every `StreamChunk`, so grouping them by `(turn, step)` reconstructs each agent-loop `stream()` call's chunk sequence. A successful compaction summarizer is logged differently: when `compaction/summary` carries `llmStreamCall: true` and its complete `rawOutput`, replay reconstructs a canonical successful stream at that event's position using one `block-start`/`block-end` pair per block, the recorded usage when present, and a terminal `stop`. Exact provider delta partitioning is not part of the durable compaction result. `rawOutput` without the marker does not imply a local LLM call because template and remote summarizers may retain complete output without using this context's adapter.
 
 Recording is therefore "run the real agent once and harvest the `.jsonl`", done by the snapshot harness — this plugin does not record. A fixture may carry its `request/header` content tokenized to `{{system}}`/`{{tools}}` (the harness pins that content in one scenario and scrubs the rest); replay is indifferent — derivation reads only `assistant/chunk` and `compaction/summary` events plus the line-0 session header.
 
@@ -60,6 +60,7 @@ Replay keys every call by its calling session id (`GenerateOptions.sessionId`, s
 - `loadSessionScripts(config)` — resolve the ordered `SessionScript[]` (primary + children) for a scenario, ready to bind to live sessions in first-call order.
 - `loadReplayScript(config)` — resolve the `ReplayEntry[]` for the primary session only (validated sidecar replacement/patches if present, else derived from the JSONL; fail-loud if the fixture is missing).
 - `deriveReplayScript(events)` / `parseSessionLog(text)` / `parseSessionHeader(text)` / `resolveScriptedEntry(entry, messages)` — the pure helpers that turn ordinary loop chunks and explicitly marked local compaction outputs in a recorded session log into a script, read its header `id`/`createdAt`, and resolve `{{fromRequest:...}}` placeholders against one live request. A derived assistant group must end in a `finish` chunk; a group without one is the fingerprint of a thrown `stream()` and must instead be expressed via an override sidecar.
+- `decodeSessionSnapshot(text)` / `decodeSessionSnapshotBody(records)` / `projectSessionSnapshot(text)` / `omitSessionEventEnvelope(record)` — the fixture codec: decode projected or persisted JSONL, materialize envelopes on already-parsed body records, project a persisted JSONL input in one parse pass, or omit the persistence envelope from an already-parsed body record.
 - Types `ReplayEntry` / `ReplayOverrideDoc` / `ReplayOverridePatch` / `SessionScript` / `ReplayConfig` / `ReplayProviderConfig` / `ReplayModelConfig` / `ReplayHandle` / `Config`.
 
 ## Plugin export shape
diff --git a/packages/test-support/llm-replay/README.zh.md b/packages/test-support/llm-replay/README.zh.md
index 5adb16e086..96e2713b1d 100644
--- a/packages/test-support/llm-replay/README.zh.md
+++ b/packages/test-support/llm-replay/README.zh.md
@@ -8,7 +8,7 @@
 
 ## fixture 的工作方式
 
-fixture 就是持久化的会话日志（`<scenario>/session.jsonl`）。其 `assistant/chunk` 事件包含每个 `StreamChunk`，因此按 `(turn, step)` 分组即可重建每次 agent loop（智能体循环）的 `stream()` 调用的分片序列。压缩（compaction）摘要器成功时，日志记录方式有所不同：当 `compaction/summary` 携带 `llmStreamCall: true` 和完整的 `rawOutput` 时，回放会在该事件的位置重建一条规范成功流，其中每个块各使用一对 `block-start`/`block-end`，带上已记录的用量（如有），并以 `stop` 终止。提供方增量的精确切分不属于持久压缩结果。不带该标记的 `rawOutput` 并不意味着发生了本地 LLM 调用，因为模板摘要器和远程摘要器即使未使用此上下文的适配器，也可能保留完整输出。
+fixture 是持久化会话日志（`<scenario>/session.jsonl`）的投影：它保留 header 与每个事件 payload，但省略正文的 `seq`/`time` envelope（打包行使用 `seq0`/`time0`）。回放在解析时恢复连续的 synthetic envelope；运行时持久化仍写入完整日志。fixture 的 `assistant/chunk` 事件包含每个 `StreamChunk`，因此按 `(turn, step)` 分组即可重建每次 agent loop（智能体循环）的 `stream()` 调用的分片序列。压缩（compaction）摘要器成功时，日志记录方式有所不同：当 `compaction/summary` 携带 `llmStreamCall: true` 和完整的 `rawOutput` 时，回放会在该事件的位置重建一条规范成功流，其中每个块各使用一对 `block-start`/`block-end`，带上已记录的用量（如有），并以 `stop` 终止。提供方增量的精确切分不属于持久压缩结果。不带该标记的 `rawOutput` 并不意味着发生了本地 LLM 调用，因为模板摘要器和远程摘要器即使未使用此上下文的适配器，也可能保留完整输出。
 
 因此，录制就是「运行一次真实 agent 并收集 `.jsonl`」，由快照 harness 完成；该插件本身不录制。fixture 的 `request/header` 内容可能被标记化为 `{{system}}`/`{{tools}}`（harness 会在一个场景中固定该内容，并清除其余场景中的内容）；回放不受影响，因为派生过程只读取 `assistant/chunk` 和 `compaction/summary` 事件以及第 0 行的会话 header。
 
@@ -60,6 +60,7 @@ fixture 就是持久化的会话日志（`<scenario>/session.jsonl`）。其 `as
 - `loadSessionScripts(config)`：解析场景中有序的 `SessionScript[]`（主会话 + 子会话），准备按首次调用顺序绑定到实时会话。
 - `loadReplayScript(config)`：只解析主会话的 `ReplayEntry[]`（如果伴随文件存在，则使用经校验的替换或补丁；否则从 JSONL 派生；fixture 缺失时明确报错）。
 - `deriveReplayScript(events)` / `parseSessionLog(text)` / `parseSessionHeader(text)` / `resolveScriptedEntry(entry, messages)`：将已记录会话日志中的普通 loop 分片和显式标记的本地压缩输出转换为脚本、读取其 header `id`/`createdAt`、并针对单次实时请求解析 `{{fromRequest:...}}` 占位符的纯辅助工具。派生的 assistant 分组必须以 `finish` 分片结束；没有该分片的分组是 `stream()` 抛出异常的指纹，必须改用 override 伴随文件表达。
+- `decodeSessionSnapshot(text)` / `decodeSessionSnapshotBody(records)` / `projectSessionSnapshot(text)` / `omitSessionEventEnvelope(record)`：fixture 编解码器；可解码投影后或完整持久化 JSONL、在已解析正文记录上补齐 envelope、通过一次解析投影持久化 JSONL 输入，或从已解析正文记录中省略持久化 envelope。
 - 类型 `ReplayEntry` / `ReplayOverrideDoc` / `ReplayOverridePatch` / `SessionScript` / `ReplayConfig` / `ReplayProviderConfig` / `ReplayModelConfig` / `ReplayHandle` / `Config`。
 
 ## 插件导出形态
diff --git a/packages/test-support/llm-replay/src/index.ts b/packages/test-support/llm-replay/src/index.ts
index 867e2f2b45..e431f67a72 100644
--- a/packages/test-support/llm-replay/src/index.ts
+++ b/packages/test-support/llm-replay/src/index.ts
@@ -11,7 +11,6 @@ import { existsSync, readFileSync, writeFileSync } from 'node:fs'
 import { delimiter as pathDelimiter } from 'node:path'
 import type { Context } from '@deepseek-ai/cordis'
 import type {} from '@deepseek-ai/dsh-compaction'
-import { decodeStorageRecord } from '@deepseek-ai/dsh-session'
 import type { SessionEvent } from '@deepseek-ai/dsh-session'
 import type {
   ContentBlock,
@@ -26,6 +25,16 @@ import type {
   TokenUsage,
 } from '@deepseek-ai/dsh-llm'
 import { LlmAdapter, LlmError, ReasoningEffortId, assertNever, resolveRetryPolicy } from '@deepseek-ai/dsh-llm'
+import { decodeSessionSnapshot } from './session-snapshot.ts'
+
+export {
+  decodeSessionSnapshot,
+  decodeSessionSnapshotBody,
+  isPackedSessionChunkRow,
+  omitSessionEventEnvelope,
+  projectSessionSnapshot,
+  type DecodedSessionSnapshot,
+} from './session-snapshot.ts'
 
 /**
  * One recorded model call. `throw` may replay prefix chunks before failing;
@@ -165,13 +174,7 @@ export interface SessionScript {
  * @returns every event after the header, in log order.
  */
 export function parseSessionLog(text: string): SessionEvent[] {
-  const lines = text.split('\n').filter(line => line.trim().length > 0)
-  const events: SessionEvent[] = []
-  // The JSONL backend guarantees line 0 is the session header.
-  for (let i = 1; i < lines.length; i++) {
-    events.push(...decodeStorageRecord(JSON.parse(lines[i] as string)))
-  }
-  return events
+  return decodeSessionSnapshot(text).events
 }
 
 /**
diff --git a/packages/test-support/llm-replay/src/session-snapshot.ts b/packages/test-support/llm-replay/src/session-snapshot.ts
new file mode 100644
index 0000000000..ec06781128
--- /dev/null
+++ b/packages/test-support/llm-replay/src/session-snapshot.ts
@@ -0,0 +1,168 @@
+/**
+ * Session snapshot projection and decoding for replay fixtures.
+ * @module @deepseek-ai/dsh-llm-replay/session-snapshot
+ */
+
+import { decodeStorageRecord, type SessionEvent } from '@deepseek-ai/dsh-session'
+
+const PACKED_CHUNK_ROW_TYPES = new Set(['text-chunks', 'reasoning-chunks', 'tool-call-chunks'])
+
+/** A decoded replay fixture with storage envelopes materialized in memory. */
+export interface DecodedSessionSnapshot {
+  /** Parsed session header. */
+  header: Record<string, unknown>
+  /** Original header line, retained byte-for-byte by projection. */
+  headerLine: string
+  /** Parsed body rows with sequence/time envelopes present. */
+  bodyRecords: Record<string, unknown>[]
+  /** Logical events expanded from ordinary and packed body rows. */
+  events: SessionEvent[]
+}
+
+interface JsonlRecord {
+  text: string
+  value: Record<string, unknown>
+}
+
+function parseJsonl(text: string): JsonlRecord[] {
+  return text.split(/\r?\n/).flatMap((line, index) => {
+    if (line.trim().length === 0) return []
+    let value: unknown
+    try {
+      value = JSON.parse(line) as unknown
+    } catch (error) {
+      throw new Error(`session snapshot line ${index + 1} contains invalid JSON: ${String(error)}`, { cause: error })
+    }
+    if (value === null || typeof value !== 'object' || Array.isArray(value)) {
+      throw new Error(`session snapshot line ${index + 1} must be a JSON object`)
+    }
+    return [{ text: line, value: value as Record<string, unknown> }]
+  })
+}
+
+/**
+ * Test whether a parsed storage or snapshot row is a packed chunk run.
+ *
+ * @param record - parsed session body record.
+ * @returns whether the row uses the packed chunk representation.
+ */
+export function isPackedSessionChunkRow(record: Record<string, unknown>): boolean {
+  return typeof record.type === 'string' && PACKED_CHUNK_ROW_TYPES.has(record.type)
+}
+
+function envelopeKeys(record: Record<string, unknown>): readonly [string, string] {
+  return isPackedSessionChunkRow(record)
+    ? ['seq0', 'time0']
+    : ['seq', 'time']
+}
+
+/** Insert a synthetic envelope after the discriminant without reparsing the row. */
+function insertSyntheticEnvelope(
+  record: Record<string, unknown>,
+  seqKey: string,
+  timeKey: string,
+  seq: number,
+): void {
+  const entries = Object.entries(record)
+  for (const key of Object.keys(record)) Reflect.deleteProperty(record, key)
+  let inserted = false
+  for (const [key, value] of entries) {
+    record[key] = value
+    if (key === 'type') {
+      record[seqKey] = seq
+      record[timeKey] = 0
+      inserted = true
+    }
+  }
+  if (!inserted) {
+    record[seqKey] = seq
+    record[timeKey] = 0
+  }
+}
+
+/**
+ * Omit a body record's persistence-only sequence/time envelope in place.
+ * Deleting all four possible keys keeps snapshot serialization independent of
+ * the record discriminant while leaving nested payload fields untouched.
+ *
+ * @param record - parsed session body record owned by the caller.
+ */
+export function omitSessionEventEnvelope(record: Record<string, unknown>): void {
+  delete record.seq
+  delete record.time
+  delete record.seq0
+  delete record.time0
+}
+
+/**
+ * Materialize missing sequence/time envelopes on parsed snapshot body records.
+ * The records are mutated in place and decoded in storage order.
+ *
+ * @param records - parsed session body records owned by the caller.
+ * @returns logical events expanded from ordinary and packed body rows.
+ */
+export function decodeSessionSnapshotBody(records: readonly Record<string, unknown>[]): SessionEvent[] {
+  const events: SessionEvent[] = []
+  let nextSeq = 0
+  for (const [index, record] of records.entries()) {
+    const [seqKey, timeKey] = envelopeKeys(record)
+    const hasSeq = Object.hasOwn(record, seqKey)
+    const hasTime = Object.hasOwn(record, timeKey)
+    if (hasSeq !== hasTime) {
+      throw new Error(`session snapshot line ${index + 2} must carry both ${seqKey}/${timeKey} or neither`)
+    }
+    if (!hasSeq) insertSyntheticEnvelope(record, seqKey, timeKey, nextSeq)
+    const decoded = decodeStorageRecord(record)
+    events.push(...decoded)
+    nextSeq += decoded.length
+  }
+  return events
+}
+
+/**
+ * Decode a committed session snapshot or a complete persisted session log.
+ * Snapshot body rows may omit both members of their sequence/time envelope;
+ * decoding restores a contiguous synthetic envelope without changing payloads.
+ *
+ * @param text - session JSONL contents.
+ * @returns the header, materialized body rows, and logical events.
+ */
+export function decodeSessionSnapshot(text: string): DecodedSessionSnapshot {
+  const records = parseJsonl(text)
+  const header = records[0]
+  if (header === undefined || header.value.type !== 'session') {
+    throw new Error('session snapshot must start with a session header')
+  }
+
+  const bodyRecords: Record<string, unknown>[] = []
+  bodyRecords.push(...records.slice(1).map(({ value }) => value))
+  const events = decodeSessionSnapshotBody(bodyRecords)
+
+  return {
+    header: header.value,
+    headerLine: header.text,
+    bodyRecords,
+    events,
+  }
+}
+
+/**
+ * Project persisted session JSONL into the committed replay-fixture format.
+ * The header line and all body payloads remain unchanged; only ordinary
+ * `seq`/`time` and packed-row `seq0`/`time0` envelopes are omitted.
+ *
+ * @param text - persisted or already-projected session JSONL.
+ * @returns compact projected body JSONL with the original header line.
+ */
+export function projectSessionSnapshot(text: string): string {
+  const records = parseJsonl(text)
+  const header = records[0]
+  if (header === undefined || header.value.type !== 'session') {
+    throw new Error('session snapshot must start with a session header')
+  }
+  const body = records.slice(1).map(({ value }) => {
+    omitSessionEventEnvelope(value)
+    return JSON.stringify(value)
+  })
+  return [header.text, ...body, ''].join('\n')
+}
diff --git a/packages/test-support/llm-replay/tests/llm-replay.spec.ts b/packages/test-support/llm-replay/tests/llm-replay.spec.ts
index 27356a8132..84494d226a 100644
--- a/packages/test-support/llm-replay/tests/llm-replay.spec.ts
+++ b/packages/test-support/llm-replay/tests/llm-replay.spec.ts
@@ -12,6 +12,7 @@ import {
   type SessionScript,
   apply,
   deriveReplayScript,
+  decodeSessionSnapshot,
   inject,
   installLlmReplay,
   loadReplayScript,
@@ -19,6 +20,7 @@ import {
   name,
   parseSessionHeader,
   parseSessionLog,
+  projectSessionSnapshot,
   resolveScriptedEntry,
 } from '../src/index.ts'
 
@@ -108,6 +110,82 @@ describe('parseSessionLog', () => {
       chunkEvent(3, 1, 1, { type: 'text-delta', index: 0, text: 'c' }),
     ])
   })
+
+  it('materializes omitted ordinary and packed snapshot envelopes', () => {
+    const header = JSON.stringify({ type: 'session', version: 0, id: 's1', createdAt: 7 })
+    const ordinary = JSON.stringify({ type: 'turn/start', data: { turn: 1 } })
+    const packed = JSON.stringify({
+      type: 'text-chunks',
+      data: { turn: 1, step: 1, index: 0, dt: [3], texts: ['a', 'b'] },
+    })
+    expect(parseSessionLog(`${header}\n${ordinary}\n${packed}\n`)).toEqual([
+      { type: 'turn/start', seq: 0, time: 0, data: { turn: 1 } },
+      chunkEvent(1, 1, 1, { type: 'text-delta', index: 0, text: 'a' }),
+      { ...chunkEvent(2, 1, 1, { type: 'text-delta', index: 0, text: 'b' }), time: 3 },
+    ])
+  })
+})
+
+describe('session snapshot codec', () => {
+  it('projects only body envelopes and retains the header line and payloads', () => {
+    const header = '  {"type":"session","version":0,"id":"s1","createdAt":7}  '
+    const ordinary = {
+      type: 'turn/start', seq: 0, time: 10,
+      data: { turn: 1, seq: 41, time: 42 },
+    }
+    const packed = {
+      type: 'text-chunks', seq0: 1, time0: 20,
+      data: { turn: 1, step: 1, index: 0, dt: [3], texts: ['a', 'b'] },
+    }
+    const projected = projectSessionSnapshot([
+      header,
+      JSON.stringify(ordinary),
+      JSON.stringify(packed),
+      '',
+    ].join('\n'))
+    const lines = projected.trimEnd().split('\n')
+
+    expect(lines[0]).toBe(header)
+    expect(JSON.parse(lines[1] ?? '{}')).toStrictEqual({
+      type: 'turn/start', data: ordinary.data,
+    })
+    expect(JSON.parse(lines[2] ?? '{}')).toStrictEqual({
+      type: 'text-chunks', data: packed.data,
+    })
+    expect(projectSessionSnapshot(projected)).toBe(projected)
+  })
+
+  it('rejects half-present storage envelopes', () => {
+    const fixture = [
+      '{"type":"session","version":0,"id":"s1","createdAt":0}',
+      '{"type":"turn/start","seq":0,"data":{"turn":1}}',
+      '',
+    ].join('\n')
+    expect(() => decodeSessionSnapshot(fixture)).toThrow(/both seq\/time or neither/)
+  })
+
+  it.each(['null', '1', '[]'])('rejects non-object JSONL records: %s', (record) => {
+    expect(() => decodeSessionSnapshot(`${record}\n`)).toThrow(/line 1 must be a JSON object/)
+  })
+
+  it('reports invalid JSON with its line', () => {
+    expect(() => projectSessionSnapshot('{"type":"session"}\n{broken}\n'))
+      .toThrow(/line 2 contains invalid JSON/)
+  })
+
+  it.each([
+    ['decode', decodeSessionSnapshot],
+    ['project', projectSessionSnapshot],
+  ] as const)('requires a session header when attempting to %s', (_name, operation) => {
+    expect(() => operation('')).toThrow(/must start with a session header/)
+    expect(() => operation('{"type":"other"}\n')).toThrow(/must start with a session header/)
+  })
+
+  it('materializes an unknown empty storage row as an ordinary event', () => {
+    const decoded = decodeSessionSnapshot('{"type":"session"}\n{}\n')
+    expect(decoded.bodyRecords).toStrictEqual([{ seq: 0, time: 0 }])
+    expect(decoded.events).toStrictEqual([{ seq: 0, time: 0 }])
+  })
 })
 
 describe('deriveReplayScript', () => {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 6123468bef..272b415337 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -7738,6 +7738,9 @@ importers:
       '@deepseek-ai/dsh-invariants':
         specifier: workspace:^
         version: link:../../runtime-diagnostics/invariants
+      '@deepseek-ai/dsh-llm-replay':
+        specifier: workspace:^
+        version: link:../llm-replay
       '@deepseek-ai/dsh-session':
         specifier: workspace:^
         version: link:../../core/session
diff --git a/scripts/migrate-packed-session-fixtures.ts b/scripts/migrate-packed-session-fixtures.ts
index f934d91cd2..7c2866f51d 100644
--- a/scripts/migrate-packed-session-fixtures.ts
+++ b/scripts/migrate-packed-session-fixtures.ts
@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 /**
- * Temporary branch-convergence command for canonical packed session fixtures.
+ * Temporary branch-convergence command for canonical projected session fixtures.
  *
  * @see ../.agents/notes/proposed/process/2026-07-26-remove-packed-session-fixture-migrator.md
  */
@@ -18,4 +18,4 @@ for (const fixture of changed) {
   writeFileSync(resolve(root, fixture.path), fixture.canonical)
   console.log(fixture.path)
 }
-console.log(`packed session fixtures: ${changed.length} rewritten, ${fixtures.length} inspected`)
+console.log(`session snapshot fixtures: ${changed.length} rewritten, ${fixtures.length} inspected`)
diff --git a/scripts/session-fixture-layout.snapshot.ts b/scripts/session-fixture-layout.snapshot.ts
index eddf94c249..ae8d11c907 100644
--- a/scripts/session-fixture-layout.snapshot.ts
+++ b/scripts/session-fixture-layout.snapshot.ts
@@ -1,4 +1,4 @@
-/** Repository-wide canonical-layout check for committed session fixtures. */
+/** Repository-wide canonical-layout check for committed session snapshots. */
 
 import { resolve } from 'node:path'
 import { expect, it } from 'vitest'
@@ -6,7 +6,7 @@ import { inspectSessionFixtureLayouts } from './session-fixture-layout.ts'
 
 const root = resolve(import.meta.dirname, '..')
 
-it('keeps every session-format JSONL fixture in canonical packed layout', () => {
+it('keeps every session-format JSONL fixture projected into canonical packed layout', () => {
   const nonCanonical = inspectSessionFixtureLayouts(root)
     .filter(fixture => fixture.source !== fixture.canonical)
     .map(fixture => fixture.path)
diff --git a/scripts/session-fixture-layout.spec.ts b/scripts/session-fixture-layout.spec.ts
index 5ba5fdfeaa..e57ed71e2e 100644
--- a/scripts/session-fixture-layout.spec.ts
+++ b/scripts/session-fixture-layout.spec.ts
@@ -1,5 +1,6 @@
 import { describe, expect, it } from 'vitest'
-import { decodeStorageRecord, type SessionEvent } from '@deepseek-ai/dsh-session'
+import { type SessionEvent } from '@deepseek-ai/dsh-session'
+import { decodeSessionSnapshot } from '@deepseek-ai/dsh-llm-replay'
 import { canonicalSessionFixture } from './session-fixture-layout.ts'
 
 const HEADER = '  {"type":"session","version":0,"id":"fixture","createdAt":1,"delegationDepth":0}  '
@@ -22,8 +23,7 @@ function unpackedFixture(): string {
 }
 
 function decodedBody(content: string): SessionEvent[] {
-  return content.trimEnd().split('\n').slice(1)
-    .flatMap(line => decodeStorageRecord(JSON.parse(line) as unknown))
+  return decodeSessionSnapshot(content).events
 }
 
 describe('canonicalSessionFixture', () => {
@@ -31,8 +31,12 @@ describe('canonicalSessionFixture', () => {
     const canonical = canonicalSessionFixture(unpackedFixture(), 'fixture.jsonl')
     expect(canonical).toBeDefined()
     expect(canonical?.split('\n')[0]).toBe(HEADER)
-    expect(JSON.parse(canonical?.split('\n')[1] ?? '{}')).toMatchObject({ type: 'text-chunks' })
-    expect(decodedBody(canonical ?? '')).toStrictEqual(chunkRun())
+    const packed = JSON.parse(canonical?.split('\n')[1] ?? '{}') as Record<string, unknown>
+    expect(packed).toMatchObject({ type: 'text-chunks' })
+    expect(packed).not.toHaveProperty('seq0')
+    expect(packed).not.toHaveProperty('time0')
+    expect(decodedBody(canonical ?? '').map(({ seq: _seq, time: _time, ...event }) => event))
+      .toStrictEqual(chunkRun().map(({ seq: _seq, time: _time, ...event }) => event))
   })
 
   it('ignores JSONL whose first record is not a session header', () => {
@@ -45,13 +49,22 @@ describe('canonicalSessionFixture', () => {
     expect(canonicalSessionFixture(packed ?? '')).toBe(packed)
   })
 
+  it('is idempotent for an already projected fixture', () => {
+    const projected = [
+      HEADER,
+      '{"type":"turn/start","data":{"turn":1,"seq":99,"time":100}}',
+      '',
+    ].join('\n')
+    expect(canonicalSessionFixture(projected)).toBe(projected)
+  })
+
   it('fails loud on malformed records after a session header', () => {
     expect(() => canonicalSessionFixture(`${HEADER}\n{not-json}\n`, 'broken.jsonl'))
-      .toThrow(/broken\.jsonl:2: invalid JSON/)
+      .toThrow(/broken\.jsonl: session snapshot line 2 contains invalid JSON/)
   })
 
   it('labels malformed packed rows with the fixture path and line', () => {
     expect(() => canonicalSessionFixture(`${HEADER}\n{"type":"text-chunks"}\n`, 'broken.jsonl'))
-      .toThrow(/broken\.jsonl:2: invalid session storage record: malformed text-chunks storage row/)
+      .toThrow(/broken\.jsonl: malformed text-chunks storage row/)
   })
 })
diff --git a/scripts/session-fixture-layout.ts b/scripts/session-fixture-layout.ts
index d1d0359374..b9505435b6 100644
--- a/scripts/session-fixture-layout.ts
+++ b/scripts/session-fixture-layout.ts
@@ -1,97 +1,82 @@
-/** Canonical packed-row layout helpers for repository session fixtures. */
+/** Canonical packed-row and envelope projection helpers for repository session fixtures. */
 
 import { deepStrictEqual } from 'node:assert'
 import { execFileSync } from 'node:child_process'
 import { existsSync, readFileSync } from 'node:fs'
 import { resolve } from 'node:path'
-import { decodeStorageRecord, packChunkRuns, type SessionEvent } from '@deepseek-ai/dsh-session'
+import { packChunkRuns, type SessionEvent } from '@deepseek-ai/dsh-session'
+import { decodeSessionSnapshot, omitSessionEventEnvelope } from '@deepseek-ai/dsh-llm-replay'
 
-/** One repository session fixture and its canonical packed representation. */
+/** One repository session fixture and its canonical projected representation. */
 export interface SessionFixtureLayout {
   /** Repository-relative path with `/` separators. */
   path: string
   /** Current fixture bytes decoded as UTF-8. */
   source: string
-  /** Canonical packed fixture bytes. */
+  /** Canonical projected fixture bytes. */
   canonical: string
 }
 
-interface RecordLine {
-  line: number
-  text: string
-}
-
-function recordLines(content: string): RecordLine[] {
-  return content.split(/\r?\n/).flatMap((text, index) => (
-    text.trim().length === 0 ? [] : [{ line: index + 1, text }]
-  ))
-}
-
-function parseRecord(line: RecordLine, label: string): unknown {
-  try {
-    return JSON.parse(line.text) as unknown
-  } catch (error) {
-    const detail = error instanceof Error ? error.message : String(error)
-    throw new Error(`${label}:${line.line}: invalid JSON: ${detail}`, { cause: error })
-  }
-}
-
 function isSessionHeader(value: unknown): boolean {
   return value !== null && typeof value === 'object' && (value as { type?: unknown }).type === 'session'
 }
 
-function decodeBody(lines: readonly RecordLine[], label: string): SessionEvent[] {
-  return lines.flatMap((line) => {
-    const record = parseRecord(line, label)
-    try {
-      return decodeStorageRecord(record)
-    } catch (error) {
-      const detail = error instanceof Error ? error.message : String(error)
-      throw new Error(`${label}:${line.line}: invalid session storage record: ${detail}`, { cause: error })
-    }
-  })
-}
-
 function renderFixture(headerLine: string, events: readonly SessionEvent[]): string {
   return [
     headerLine,
-    ...packChunkRuns(events).map(record => JSON.stringify(record)),
+    ...packChunkRuns(events).map((stored) => {
+      const record = stored as unknown as Record<string, unknown>
+      omitSessionEventEnvelope(record)
+      return JSON.stringify(record)
+    }),
     '',
   ].join('\n')
 }
 
+function withoutEnvelope(events: readonly SessionEvent[]): Array<Omit<SessionEvent, 'seq' | 'time'>> {
+  return events.map((event) => {
+    const { seq: _seq, time: _time, ...projected } = event
+    return projected
+  })
+}
+
 /**
  * Canonicalize one JSONL document when its first record is a session header.
- * The header line remains byte-identical; body records decode to logical events
- * and re-encode with {@link packChunkRuns}. Non-session JSONL returns undefined.
+ * The header line remains byte-identical; body records decode to logical events,
+ * re-encode with {@link packChunkRuns}, and omit storage sequence/time envelopes.
+ * Non-session JSONL returns undefined.
  *
  * @param content - JSONL source text.
  * @param label - path-like diagnostic label.
  * @returns Canonical text for a session fixture, otherwise undefined.
  */
 export function canonicalSessionFixture(content: string, label = '<session-fixture>'): string | undefined {
-  const lines = recordLines(content)
-  const header = lines[0]
-  if (header === undefined) return undefined
+  const headerLine = content.split(/\r?\n/).find(line => line.trim().length > 0)
+  if (headerLine === undefined) return undefined
 
   let headerValue: unknown
   try {
-    headerValue = JSON.parse(header.text) as unknown
+    headerValue = JSON.parse(headerLine) as unknown
   } catch {
     return undefined
   }
   if (!isSessionHeader(headerValue)) return undefined
 
-  const events = decodeBody(lines.slice(1), label)
-  const canonical = renderFixture(header.text, events)
-  const canonicalLines = recordLines(canonical)
-  const decoded = decodeBody(canonicalLines.slice(1), label)
+  let decodedSource
   try {
-    deepStrictEqual(decoded, events)
+    decodedSource = decodeSessionSnapshot(content)
   } catch (error) {
-    throw new Error(`${label}: packed rewrite changed the decoded event stream`, { cause: error })
+    const detail = error instanceof Error ? error.message : String(error)
+    throw new Error(`${label}: ${detail}`, { cause: error })
   }
-  if (renderFixture(header.text, decoded) !== canonical) {
+  const canonical = renderFixture(decodedSource.headerLine, decodedSource.events)
+  const decoded = decodeSessionSnapshot(canonical).events
+  try {
+    deepStrictEqual(withoutEnvelope(decoded), withoutEnvelope(decodedSource.events))
+  } catch (error) {
+    throw new Error(`${label}: packed snapshot rewrite changed the event payload stream`, { cause: error })
+  }
+  if (renderFixture(decodedSource.headerLine, decoded) !== canonical) {
     throw new Error(`${label}: packed rewrite is not idempotent`)
   }
   return canonical
diff --git a/scripts/smoke-python-runtime.py b/scripts/smoke-python-runtime.py
index 8cac1519b5..8dfb7969fd 100644
--- a/scripts/smoke-python-runtime.py
+++ b/scripts/smoke-python-runtime.py
@@ -912,12 +912,16 @@ def build_snapshot_files(
     files = {
         "result.json": json.dumps(normalized_result, indent=2, ensure_ascii=False) + "\n",
         "session.jsonl": render_jsonl(
-            [normalize_snapshot_value(record, replacements) for record in logs[SNAPSHOT_SESSION_ID]]
+            project_session_snapshot([
+                normalize_snapshot_value(record, replacements) for record in logs[SNAPSHOT_SESSION_ID]
+            ])
         ),
     }
     for index, child_id in enumerate(child_ids, start=1):
         files[f"session.{index}.jsonl"] = render_jsonl(
-            [normalize_snapshot_value(record, replacements) for record in logs[child_id]]
+            project_session_snapshot([
+                normalize_snapshot_value(record, replacements) for record in logs[child_id]
+            ])
         )
     return files
 
@@ -1009,6 +1013,15 @@ def render_jsonl(records: list[object]) -> str:
     )
 
 
+def project_session_snapshot(records: list[dict[str, object]]) -> list[dict[str, object]]:
+    """Omit storage sequence/time envelopes from snapshot body records."""
+    projected = [dict(record) for record in records]
+    for record in projected[1:]:
+        for key in ("seq", "time", "seq0", "time0"):
+            record.pop(key, None)
+    return projected
+
+
 def compare_snapshot_files(
     files: dict[str, str],
     update: bool,
diff --git a/scripts/snapshots/python-sdk-single-exe/advanced/session.1.jsonl b/scripts/snapshots/python-sdk-single-exe/advanced/session.1.jsonl
index e18ff2c585..a720e5ab22 100644
--- a/scripts/snapshots/python-sdk-single-exe/advanced/session.1.jsonl
+++ b/scripts/snapshots/python-sdk-single-exe/advanced/session.1.jsonl
@@ -1,19 +1,19 @@
 {"type":"session","version":0,"id":"{{child-1}}","createdAt":0,"cwd":"{{cwd}}","parentSession":"{{parent}}","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"{{messageId}}"}]}}
-{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":3,"time":0,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
-{"type":"step/start","seq":4,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":0,"data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"{{messageId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"{{messageId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":7,"time":0,"data":{"title":"Reply with exactly DIRECT_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":8,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"smoke-model","maxTokens":256000,"reasoningEffort":"high"},"adapterDefaults":{"reasoningEffort":true,"maxTokens":true},"system":"{{system}}","tools":["cordis_define","cordis_inspect_list","cordis_inspect_query","cordis_inspect_self","cordis_run","cordis_stop","cordis_undefine","job_kill","job_list","job_output","run_code","snapshot_double","subagent","workflow"]},"reason":"initial"}}
-{"type":"request/context","seq":9,"time":0,"data":{"provider":"deepseek-official","model":"smoke-model","contextWindow":1000000}}
-{"type":"assistant/chunk","seq":10,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"DIRECT_CHILD_OK"}}}
-{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DIRECT_CHILD_OK"}}}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":15,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"smoke-model"},"id":"{{messageId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
-{"type":"step/end","seq":16,"time":0,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":17,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"{{messageId}}"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Check direct child"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly DIRECT_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"{{messageId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"{{messageId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly DIRECT_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"smoke-model","maxTokens":256000,"reasoningEffort":"high"},"adapterDefaults":{"reasoningEffort":true,"maxTokens":true},"system":"{{system}}","tools":["cordis_define","cordis_inspect_list","cordis_inspect_query","cordis_inspect_self","cordis_run","cordis_stop","cordis_undefine","job_kill","job_list","job_output","run_code","snapshot_double","subagent","workflow"]},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"smoke-model","contextWindow":1000000}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"DIRECT_CHILD_OK"}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DIRECT_CHILD_OK"}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
+{"type":"assistant/chunk","data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"smoke-model"},"id":"{{messageId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
+{"type":"step/end","data":{"turn":1,"step":1}}
+{"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}
diff --git a/scripts/snapshots/python-sdk-single-exe/advanced/session.2.jsonl b/scripts/snapshots/python-sdk-single-exe/advanced/session.2.jsonl
index a407d19417..0234662433 100644
--- a/scripts/snapshots/python-sdk-single-exe/advanced/session.2.jsonl
+++ b/scripts/snapshots/python-sdk-single-exe/advanced/session.2.jsonl
@@ -1,19 +1,19 @@
 {"type":"session","version":0,"id":"{{child-2}}","createdAt":0,"cwd":"{{cwd}}","parentSession":"{{parent}}","origin":"subagent","delegationDepth":1}
-{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"{{messageId}}"}]}}
-{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"subagent/descriptor","seq":3,"time":0,"data":{"version":2,"mode":"one-shot","provider":"spawn"}}
-{"type":"step/start","seq":4,"time":0,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":5,"time":0,"data":{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"{{messageId}}"},"surfaceOp":"append"}
-{"type":"user/message","seq":6,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"{{messageId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":7,"time":0,"data":{"title":"Reply with exactly WORKFLOW_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":8,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"smoke-model","maxTokens":256000,"reasoningEffort":"high"},"adapterDefaults":{"reasoningEffort":true,"maxTokens":true},"system":"{{system}}","tools":["cordis_define","cordis_inspect_list","cordis_inspect_query","cordis_inspect_self","cordis_run","cordis_stop","cordis_undefine","job_kill","job_list","job_output","run_code","snapshot_double","subagent","workflow"]},"reason":"initial"}}
-{"type":"request/context","seq":9,"time":0,"data":{"provider":"deepseek-official","model":"smoke-model","contextWindow":1000000}}
-{"type":"assistant/chunk","seq":10,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"text-delta","index":0,"text":"WORKFLOW_CHILD_OK"}}}
-{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"WORKFLOW_CHILD_OK"}}}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":15,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"WORKFLOW_CHILD_OK"}],"source":{"kind":"model","provider":"deepseek-official","model":"smoke-model"},"id":"{{messageId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[10,11,12,13,14],"surfaceOp":"append"}
-{"type":"step/end","seq":16,"time":0,"data":{"turn":1,"step":1}}
-{"type":"turn/end","seq":17,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"{{messageId}}"}]}}
+{"type":"turn/start","data":{"turn":1}}
+{"type":"agent/inbox/spliced","data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","data":{"version":2,"mode":"one-shot","provider":"spawn"}}
+{"type":"step/start","data":{"turn":1,"step":1}}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Reply with exactly WORKFLOW_CHILD_OK and nothing else."}],"source":{"kind":"user"},"role":"user","id":"{{messageId}}"},"surfaceOp":"append"}
+{"type":"user/message","data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nYou are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt","form":"snapshot","sections":[{"name":"subagent:delegation","text":"You are a delegated subagent: your permission scope was fixed when you were started and cannot be widened from inside this session — operations that require approval are rejected automatically. When the task needs access beyond that scope, do not retry the denied operation; state the limitation in your reply so the delegating agent can handle it."}]},"role":"user","id":"{{messageId}}"},"surfaceOp":"append"}
+{"type":"session/title","data":{"title":"Reply with exactly WORKFLOW_CHILD_OK and","messageSeqs":[5],"source":{"kind":"fallback"}}}
+{"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"smoke-model","maxTokens":256000,"reasoningEffort":"high"},"adapterDefaults":{"reasoningEffort":true,"maxTokens":true},"system":"{{system}}","tools":["cordis_define","cordis_inspect_list","cordis_inspect_query","cordis_inspect_self","cordis_run","cordis_stop","cordis_undefine","job_kill","job_list","job_output","run_code","snapshot_double","subagent","workflow"]},"reason":"initial"}}
+{"type":"request/context","data":{"provider":"deepseek-official","model":"smoke-model","contextWindow":1000000}}
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