_Kerman
fc8d339bf0
The automation bridge inherited two master-era assumptions the message machine no longer honors. A prompt blocked at pre-turn admission opens no turn, so no turn/end could ever settle it — the bridge now watches whenIdle() and reports a turnless slot as cancelled (the disposed-agent guard moved to a registry identity check before send). A failed turn no longer rejects at its turn/end either: agent.retry() closes the failed turn and opens a successor on the same history, so the bridge holds the terminal error and lets a retry-triggered turn/start adopt the prompt, rejecting only at quiescence with no successor. Also: refresh the empty-response-retry fixture for retry-as-turn logging, adapt master-side tests to the unified send()/UserMessageData API and registry-fact disposal, resync the doc pairs both sides touched, trim architecture.md back under its word ceiling, and regenerate the event and persistence catalogs.
@deepseek-ai/dsh-acp
Automation-only Agent Client Protocol server over JSON-RPC stdio. Programmatic clients create fresh harness agents, send text prompts, collect committed assistant text, resolve one-shot permission requests by policy, and cancel work. The primary in-repository client is dsh-subagent-acp.
This package is a transport adapter, not a UI integration or a capability seam. It does not expose editor navigation, transcript replay, commands, modes, configuration pickers, elicitation, reasoning, plans, titles, or tool presentation. Interactive rendering and human questions belong to the web and TUI modules.
Plugin
apply(ctx, config) opens an AgentSideConnection on stdin/stdout and drives ctx.agents. Stdout is reserved for protocol frames.
| Config | Default | Meaning |
|---|---|---|
provider |
— | Initial provider route for every created agent. |
model |
— | Initial model for every created agent. |
Both fields are optional so another agent/request listener may supply the target. The runnable ACP composition requires both.
Protocol contract
| Method | Behavior |
|---|---|
initialize |
Negotiates the supported version and advertises baseline-only prompts (no image, audio, or embedded-context capability). No session, editor, terminal, filesystem, or MCP capability is advertised. |
authenticate |
No-op because the server advertises no authentication methods. |
session/new |
Creates a fresh agent with an absolute primary cwd; empty additionalDirectories and mcpServers are accepted, non-empty values reject. |
session/prompt |
Concatenates text blocks, renders baseline resource links as bracketed textual references, rejects empty or beyond-baseline input, permits one in-flight request per session, and settles from that request's owning durable turn/end. |
session/cancel |
Cancels only the addressed agent and settles its pending prompt as cancelled; unknown ids are no-ops. |
session/update |
Emits one agent_message_chunk per non-empty text block in a committed assistant/message. Raw deltas and non-message events are omitted. |
session/request_permission |
Offers one-shot allow/reject choices for bridge-owned approval requests carrying a tool call id. Clients may answer automatically. |
One connection may own several sessions. The bridge keys records by branded session id and checks exact agent identity before routing events or permission requests. Each session has an independent prompt slot, workspace, cancellation path, and disposer.
Committed-message output intentionally trades token-by-token latency for a clean automation result. Uncommitted provider chunks and retry attempts cannot leak partial text; reasoning and tool activity remain in the session log for observability through other interfaces.
Lifecycle
Client disconnect and Cordis disposal share one memoized teardown. The bridge first rejects new sessions and prompts, settles pending prompts, then disposes all owned agent handles in parallel and awaits their loop/session cleanup. An ACP-only plugin reload therefore leaves no orphan agent.
Running
pnpm --dir /path/to/deepseek-harness run demo:acp boots the repository's automation server composition. A parent harness can spawn it through @deepseek-ai/dsh-subagent-acp; other ACP clients need only the core methods above.
Model Experience
Prompt text
What the model sees
session/prompt text blocks are concatenated verbatim into one user message; a baseline resource link appears in that message as a bracketed [resource_link name=… uri=…] reference the model may open with its own tools. Protocol metadata, client capabilities, permission choices, and session ids never enter the model request.
Token effect
Prompt tokens are data-dependent and remain in that session's history until compaction. Concurrent ACP sessions retain independent contexts.
KV Cache effect
Append-only; the new user message follows the reusable request prefix and does not invalidate prior cache entries.
Permission decisions
What the model sees
Nothing directly. The owning tool records its allowed, rejected, cancelled, or unavailable outcome through the normal tool-result path.
Token effect
Only the owning tool result contributes tokens.
KV Cache effect
Append-only through the owning tool result.
Known Limitations and Deferred Work
- Fresh sessions only — load, list, resume, delete, and fork are unsupported.
- Baseline prompts and one workspace only — images, audio, embedded resources, non-empty additional directories, and MCP servers reject; resource links flatten to textual references rather than fetched content.
- Committed answers only — live progress, reasoning, tool activity, plans, titles, and usage stay off the wire.
- Connection-owned lifetime — one connection releases all of its sessions; per-session close is not implemented.