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Merge retargeted parent into Claude Code subagent provider

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Tianyi Cui
2026-08-06 21:38:47 +08:00
parent f09986a02b 0748ebee39
commit 4b1528bcec
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docs/cookbook/extension-cookbook.md
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English | [中文](extension-cookbook.zh.md)
> FIXME: This important guide has not received sufficient human design review; complete that review before the first release.
The three plugin shapes you write against the harness extension surface, as illustrative snippets (elided imports and helper stubs — not copy-paste-complete). For the full step-by-step guides see [adding a package](adding-a-package.md), [adding a tool](adding-a-tool.md), and [adding an LLM adapter](adding-an-llm-adapter.md); for the seams these hook into see [docs/architecture.md](../architecture.md).
Reference shapes for the harness extension surface. The snippets omit imports and helper implementations and are not copy-paste-complete. For concrete authoring paths, see the [package checklist](adding-a-package.md), [first-tool tutorial](../user/develop/basic/tool.md), [tool reference](adding-a-tool.md), and [LLM adapter guide](adding-an-llm-adapter.md); the [architecture](../architecture.md) owns the system and extension-seam map.
## A tool plugin
@@ -64,7 +62,7 @@ export function apply(ctx: Context) {
## An external protocol driver
A *protocol driver* adapts a wire peer to `ctx.agents`; it may serve a UI or an automation client. A stdio driver owns stdout, creates or resumes agents through the factory, maps the protocol's requests to `followup()` or `cancel()`, and settles each request exactly once from durable `turn/end`. Tear agents down with `AgentHandle.dispose()` so disposal reaches quiescence.
A *protocol driver* adapts a wire peer to `ctx.agents`; it may serve a UI or an automation client. A stdio driver owns stdout, creates or resumes agents through the factory, and maps protocol requests to `followup()` or `cancel()`. A low-level prompt request returns its durable enqueue receipt; it does not acquire a result by correlating `MessageId` with `turn/end`. Publish whole-agent status separately. An automation method may wait from its receipt through the next idle and summarize that explicitly owned interval, while a UI normally keeps observing the open-ended event stream. Tear agents down with `AgentHandle.dispose()` so disposal reaches quiescence.
[`packages/acp/acp`](../../packages/acp/acp) is the automation-only worked example: it exposes fresh text sessions over Agent Client Protocol JSON-RPC stdio, emits committed assistant text, and registers a one-shot machine permission answerer for agents it owns. Its [README](../../packages/acp/acp/README.md) owns the exact method and lifecycle contract.
@@ -84,7 +82,8 @@ export function apply(ctx: Context) {
}
}
})
// Inbound "prompt": create/resume an agent and feed it; settle on turn end.
// Inbound "prompt": create/resume an agent, feed it, and return its enqueue receipt.
// Whole-agent status is a separate notification; no turn end belongs to this prompt.
// Teardown reaches quiescence via AgentHandle.dispose() (stop + await exit).
}
```
@@ -101,12 +100,12 @@ Every product feature maps to a listener on a documented extension seam — the
| Product feature | Plugin mechanism |
|---|---|
| Hook system (user + project level) | listeners on `agent/session-start`, `agent/prompt-submit`, `agent/request`, `tools/pre-execute`, `tools/post-execute`, and `agent/turn-stopping`; the waterfall seams return typed decisions, while `agent/turn-stopping` may steer another step; the `dsh-hooks-claude` / `dsh-hooks-codex` bridges map hook config files onto these seams |
| Hook system (user + project level) | listeners on `agent/session-start`, `agent/pre-step`, `agent/request`, `tools/pre-execute`, `tools/post-execute`, and `agent/turn-stopping`; the waterfall seams return typed decisions, while `agent/turn-stopping` may steer another step; the `dsh-hooks-claude` / `dsh-hooks-codex` bridges map hook config files onto these seams |
| `/goal` | `ctx.goals` owns durable state, `dsh-goal-session` schedules same-session rounds through the public `Agent`, and separate command/tool producers expose human/model control |
| `/loop` | on the `turn/end` session event, `followup()` the next iteration; or force-continue |
| Dynamic workflow | `ctx.workflows` + the worker-thread engine + the `workflow` tool; structured in-process children enforce output with scoped prompt/tool registrations, a monotonic tool guard, final `tools/result` commit (including enclosing `run_code`), and the structured-output execution's monotonic `concludeTurn()` marker |
| Queued + steering messages | core `Agent.followup()` / `Agent.steer()` |
| Context compaction (auto + manual) | the `ctx.compact` seam + `dsh-compact-basic`; automatic pressure runs on serial `agent/step`, canonical overflow recovery runs on `agent/request-error`, and manual callers use the same compact service ([compaction Agent Note](../../.agents/notes/implemented/feature/2026-06-18-compaction-capability-seam.md) — the model-facing `/compact` consumer tool is deferred) |
| Context compaction (auto + manual) | the `ctx.compact` seam + `dsh-compact-basic`; automatic pressure runs on serial `agent/pre-step`, canonical overflow recovery runs on `agent/request-error`, and manual callers use the same compact service ([compaction Agent Note](../../.agents/notes/implemented/feature/2026-06-18-compaction-capability-seam.md) — the model-facing `/compact` consumer tool is deferred) |
| System prompt configurability | `ctx.systemPrompt.section()` with ordering and scope-local shadowing |
| AGENTS.md (root) | a section provider reading the file |
| AGENTS.md (subdir, on-touch) + file-change notices | `agent.inject()` from a watcher / tool-result listener |