2026-07-11 14:08:24 +08:00
# DeepSeek Harness Python SDK
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
English | [中文 ](README.zh.md )
2026-07-11 14:08:24 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
Python subprocess SDK for driving DeepSeek Harness over newline-delimited JSON-RPC on stdio. Install `deepseek-harness-sdk` ; it installs the exact same-version `deepseek-harness-runtime-bin` wheel for the current platform.
2026-08-10 19:45:54 +08:00
```sh
python -m pip install deepseek-harness-sdk
```
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
## Start a runtime
The Python SDK has no separate application entrypoint. It launches the bundled `dsh` CLI with `--profile sdk` ; the selected profile owns the JSON-RPC server, agent composition, credentials, persistence, tools, and shutdown behavior.
Every launch requires an explicit Harness home. Pass `dsh_home` or provide a non-empty `DSH_HOME` in the child environment. The SDK deliberately never discovers `~/.dsh` .
2026-07-13 16:34:16 +08:00
```py
from deepseek_harness import DeepSeekHarness
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
with DeepSeekHarness(
dsh_home="/absolute/path/to/isolated-dsh-home",
cwd="/absolute/path/to/workspace",
) as harness:
result = harness.run("Say hi.", session_id="example-001")
print(result.final_response)
2026-07-13 16:34:16 +08:00
```
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
`DeepSeekHarness` starts lazily and reuses its runtime until `close()` or context-manager exit. `cwd` is the agent workspace; `runtime_cwd` independently selects the subprocess working directory. Both become absolute before launch. `provider` , `model` , and optional positive `max_tokens` are sent during JSON-RPC initialization. `base_url` and `api_key` explicitly override `DEEPSEEK_BASE_URL` and `DEEPSEEK_API_KEY` in the child environment.
fix(sdk): harden runtime lifecycle and JSON-RPC
Keep DeepSeekHarness.run() reusable, but make ownership of its lazy
runtime process explicit. Document the context-manager/close contract and
update every construction example to use a context manager so repeated runs
remain valid without encouraging leaked subprocesses.
Contain notification predicate failures at the subscription boundary. Remove
only the subscriber whose callback raised, deliver that exception through its
queue, and continue dispatching to healthy subscribers so arbitrary callback
code cannot terminate the shared reader thread or strand later requests.
Enforce one in-flight prompt per server session with an atomic activePrompt
guard. Route overlap through the existing -32603 handler-error response and
clear the guard in finally, preserving parallel prompts across sessions and
sequential reuse without changing JSON-RPC request or notification shapes.
Use StringDecoder for line framing so a UTF-8 code point split across Buffer
chunks is not corrupted. Add a queued-write flush barrier, and make memoized
shutdown await it before disposal and exit while retaining exactly-once
cleanup when shutdown calls race or flushing fails.
Cover callback isolation, same-session exclusion, cross-session concurrency,
split multibyte input, delayed writes, racing shutdown, and flush failure with
deterministic tests.
2026-07-13 20:53:20 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
## Customize plugins
2026-07-11 14:08:24 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
Persistent customization belongs to a `dsh` profile. Initialize the shipped SDK profile and install an external bundle with the runtime wheel's `dsh` command:
```sh
export DSH_HOME=/absolute/path/to/isolated-dsh-home
dsh --profile sdk --dump-default-config >/dev/null
dsh plugin --profile sdk add file:/absolute/path/to/my-plugin-bundle
```
2026-07-11 14:08:24 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
The `file:` form installs the local bundle into the profile package tree, where its peer imports reach the bundled installation fallback. The profile manifest records installed dependencies and ordered bundle layers; its `$DSH_HOME/profiles/sdk/cordis.patch.yml` is the persistent user patch. `dsh plugin` needs `pnpm` only when managing external packages. Running the SDK does not require system Node.js.
For an invocation-specific change, pass one or more patch files. They become absolute and are forwarded in order after the profile and home patch layers:
```py
2026-07-11 14:08:24 +08:00
with DeepSeekHarness(
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
dsh_home="/absolute/path/to/isolated-dsh-home",
profile="sdk",
patches=("/absolute/path/to/first.patch.yml", "/absolute/path/to/last.patch.yml"),
2026-07-11 14:08:24 +08:00
) as harness:
result = harness.run("Make the requested code change.")
```
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
`profile` may select another existing profile, but that composition must retain `@deepseek-ai/dsh-sdk-app` or another `@deepseek-ai/dsh-sdk-jsonrpc-server` row. Misconfiguration fails during CLI boot or SDK initialization; there is no complete-config fallback. `dsh_bin` may select another `dsh` executable while preserving the same profile grammar. Arbitrary argv replacement remains an internal fake-runtime test adapter, not public API.
2026-07-14 21:57:52 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
## Results and notifications
2026-08-10 19:30:46 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
`Session.run()` owns an activity interval from its prompt's durable inbox receipt through the next whole-agent idle and returns `RunResult(session_id, final_response, finish_reason, events, notifications)` . `final_response` is the last committed root-session assistant text in the interval. `finish_reason` is the `kind` of the last root-session `turn/end` , such as `completed` , `max-tokens` , or `error` , and is `None` when no turn ended. A `turn/end` without a string `data.reason.kind` violates the protocol and raises `SdkProtocolError` .
2026-07-30 16:48:28 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
`HarnessClient` retains discovered subagent ancestry for the runtime process lifetime. During `Session.run()` , `RunResult.notifications` and `on_notification` receive the root session and known descendants in wire order. `RunResult.events` contains root-session events only, so descendant output cannot replace the root response. The low-level `session_prompt()` returns the queued message id immediately; callers that bypass `Session.run()` own the later activity boundary.
2026-07-11 14:08:24 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
The selected home stores profiles, plugins, credentials, settings, and sessions. Use a fresh home when those resources must be isolated, and a fresh session id for independent work. Reusing both a harness and session id continues the durable conversation and session-owned resources.
2026-07-13 16:34:16 +08:00
docs(python): make the dsh profile runtime current
Document dsh as the only application launcher across architecture, CLI, SDK, app-boot, Python package, contributor, tutorial, and example references. Explain explicit home selection, profile and patch precedence, persistent external plugin installation, the Node-free runtime path, and the absence of complete-config or ~/.dsh fallbacks.
Record the Python profile-runtime decision and update the active naming, installed-wheel, and SEA packaging notes with precise supersession. Regenerate the configuration catalog and module graph after deleting the carrier, update both reviewed languages and pairing records, and classify the retained standalone Cordis files as lower-level test fixtures rather than launch interfaces.
2026-08-23 14:56:55 +08:00
See the [Python tutorial ](../../docs/user/guide/python-sdk.md ), [`python-sdk-agent` example ](../../examples/python-sdk-agent/README.md ), and [runtime wheel reference ](../sdk-runtime/README.md ).
