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fix(scope): close final ownership races

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Drain idle injection flushes before agent teardown, snapshot approval and subagent provider inputs, and gate subagent lifecycle events on real child readiness. Align the RFCs and generated contracts with the hardened behavior.
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Tianyi Cui
2026-07-12 00:31:46 +08:00
parent e6c7522a75
commit 3529b3c166
43 changed files with 825 additions and 261 deletions
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packages/core/agent/README.md
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@@ -23,7 +23,7 @@ Agent *creation* is provided by the plugin implementing `AgentFactory` (`dsh-age
- `ctx.agents.create(options: CreateAgentOptions): Promise<AgentHandle>` — snapshot caller-owned IDs/options/metadata/seed, construct and await optional setup while unpublished, insert and announce both session and agent, open the `agent/session-start` driving boundary, then start a new loop on the caller-supplied `sessionId`. Agent/session IDs are reserved across setup; setup rejection or owner unload publishes nothing. Publication is rollback-covered: if a creation listener throws, entries and scope unwind but effects of already-delivered notifications remain observable; an agent whose announcement began emits `agent/disposed` during that rollback. Rejects if no factory is registered.
- `ctx.agents.resume(options: ResumeAgentOptions): Promise<AgentHandle>` — snapshot caller-owned IDs/options, load a persisted session ([session persistence](../../../docs/rfc/implemented/architecture/2026-06-14-session-persistence.md)), mint a fresh agent scope, await optional setup while unpublished, then follow the same insert → announce → session-start → loop-start boundary. The IDs are reserved across persistence load and setup; load/setup rejection or owner unload publishes nothing. Rejects if no factory is registered or session persistence is unconfigured.
`AgentHandle = { agent: Agent; dispose(): Promise<void> }`. The disposer is a **capability** — only the holder can tear this agent down. `dispose()` stops the loop, `await`s its exit (quiescence — NOT just the `disposed` status flip), unregisters the agent, removes its session from the store, and finally unwinds its scoped world. This order captures the loop's final `session/flush` before the session is detached and keeps scoped listeners alive through that flush. `ctx.agents.get(id)` still returns a bare `Agent` — the handle is only for the OWNER that created it. The ACP bridge and in-process subagent backends are production consumers; config-created agents are owned by the loop fiber and never need a handle.
`AgentHandle = { agent: Agent; dispose(): Promise<void> }`. The disposer is a **capability** — only the holder can tear this agent down. `dispose()` stops the loop, `await`s its exit plus every outstanding idle-injection flush (quiescence — NOT just the `disposed` status flip), unregisters the agent, removes its session from the store, and finally unwinds its scoped world. This order captures every agent-started `session/flush` before the session is detached and keeps scoped listeners alive through those checkpoints. `ctx.agents.get(id)` still returns a bare `Agent` — the handle is only for the OWNER that created it. The ACP bridge and in-process subagent backends are production consumers; config-created agents are owned by the loop fiber and never need a handle.
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