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Merge branch 'codex/simp-agent-entry-state' into codex/simp-unify-agent-session-id

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# Conflicts:
#	packages/ui/stdio-agent/README.md
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Tianyi Cui
2026-07-14 15:27:32 +08:00
parent b58cf7ec2f 262a0d0a2b
commit 440afff96e
101 changed files with 2272 additions and 171 deletions
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packages/core/agent/README.md
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@@ -51,8 +51,27 @@ The handle every plugin programs against:
- Agent creation: `AgentLoop.create()` is the concrete config-path implementation (in `dsh-agent-loop`), while programmatic consumers create/resume owned agents through `ctx.agents.create()` / `ctx.agents.resume()`. Replace the loop by implementing `Agent` and registering via `ctx.agents.register()`.
- Event listeners: all `agent/*` events are declared here — no dependency on the loop package needed.
- Subagent delegation: implemented by `@deepseek-ai/dsh-subagent`, not by a method on `Agent`; providers create or drive ordinary `Agent` handles through the factory seam, so spawn/fork/ACP transports stay outside the core agent interface.
- Subagent delegation is not an `Agent` method; providers create or drive ordinary handles through the factory seam, so delegation transports stay outside the core agent interface.
### What is NOT here (TODO)
## Model Experience
### User, steering, and injected messages
**What the model sees**: `send`, `steer`, and `inject` feed the owning session. `agent/prompt-submit`, `agent/session-prefix`, and other declared events let plugins block a prompt or add request material; this interface contributes no fixed prose itself.
**Token effect**: Accepted content becomes retained history or a repeated session prefix; blocked content contributes no request tokens. Size is caller- and plugin-dependent.
### Agent-scoped request composition
**What the model sees**: Registrations through `agent.ctx` can shadow prompt sections or tools and can install agent-only interceptors during unpublished setup.
**Token effect**: The package adds zero tokens itself; scoped contributions affect only that agent and disappear on disposal.
## Known Limitations and Deferred Work
- **Inter-agent channels beyond delegation** — shared state, streaming child output, and background/poll semantics remain outside the current synchronous `ctx.subagents` seam.
- **`agent/session-start` cannot gate startup** — it remains a synchronous, veto-less notification; async composition that must finish before publication belongs in the factory's `setup(agentCtx)` transaction instead.
- **No public step-only abort** — `cancel()` clears ALL pending work (queued + steering + in-flight); an abort that preserves queued prompts returns only with a named consumer ([stop-surface RFC](../../../docs/rfc/implemented/simplification/2026-06-20-public-agent-stop-surface.md)).
- **`HookContext` carries exactly one `MessageSource`** — contributions from several plugins merged onto one tool call collapse under one source; mixed provenance is unrepresentable.
- **`SessionStartSource` reserves `'clear'`/`'compact'` with no emitter yet** — only `'startup'`/`'resume'` occur until the driving subsystems land (`TODO(compaction)`).
- **`agent/pre-step`'s `fullSystemPrompt`/`sessionPrefix` parameters are a flagged smell** — compaction is their only consumer; a lazy prompt provider or a compaction-specific pressure seam is the marked revisit.