deepseek-harness/examples/acp-agent

acp-agent example

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Automation-oriented Agent Client Protocol server over JSON-RPC stdio. It is intended for parent agents, subagent providers, and other programmatic clients, not as the product UI.

pnpm run demo:acp             # needs DEEPSEEK_API_KEY (repo-root .env or env)
pnpm run demo:code-mode       # same protocol with the Code Mode tool transport

The dsh launcher applies the shipped acp profile (dsh-base plus dsh-acp-app), then this leaf's cordis.yml patch. The profile supplies the ACP bridge, DeepSeek adapter, sandboxed shell and filesystem stacks, approval policy, compaction, subagents, workflows, a session-query index, and repeat guard; the leaf pins demo and snapshot values and adds hook bridges. The bridge creates one fresh agent per session/new, persists sessions to JSONL, and keeps stdout protocol-pure. Optional patch overlays add session-query tools, spill settings, Code Mode, or web fetching.

Protocol channel

Stdout carries only newline-delimited ACP JSON-RPC. @deepseek-ai/dsh-acp-app and this patch install no stdout logger; added plugins must use stderr for diagnostics.

The automation contract — supported methods, baseline prompt content, committed-text output, and the intentionally absent UI surfaces — lives in @deepseek-ai/dsh-acp.

Session workspaces and permissions

Each session/new supplies an absolute cwd. Sandboxed bash and filesystem mutations resolve workspace-write against that session cwd, so concurrent sessions can use separate project roots; platform temporary roots remain shared writable scratch space (sandbox contract). DSH_PERMISSION_MODE selects workspace-write or danger-full-access for the deployment.

Under workspace-write, a model retry requesting wider sandbox access triggers session/request_permission with allow_once and reject_once. The client decides programmatically; dismissal or an unavailable answer fails closed. The selected outcome applies only to that retry and is recorded through the normal tool-result/audit path. The server never exposes a permission picker or persists client policy.