From 05b75abbca004f263191f803873a87697fdb7290 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 10:32:55 +0800 Subject: [PATCH 01/47] refactor(events): document event-domain semantics, drop step-boundary mirror emits MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Pin the three-domain rule (session = durable fact log, agent = live runtime surface, tools = registry/exec): a durable replayable fact is a SessionEvent; a live interception or transient/live-object signal is an agent/tools Cordis event. A boundary that is both is mirrored as an agent/* emit ONLY where a live consumer needs the Agent handle. Apply it to the boundary twins: drop agent/step-start and agent/step-end (no production consumer needs the live Agent at a step boundary — consumers read the durable step/start/step/end session events). Keep agent/turn-start/turn-end (the stdio UI labels output by agent.id). Tests that observed step boundaries via the removed emits now observe the durable session events; the pinned behavior is unchanged. Conservative subset of the proposed "remove boundary mirror events" simplification; foundation for the Hooks subsystem's canonical event surface. --- docs/architecture.md | 8 +- docs/cordis-catalog/events-and-services.md | 50 +++------ docs/rfc/README.md | 1 + .../2026-06-30-event-domain-semantics.md | 39 +++++++ packages/core/agent-loop/src/loop.ts | 47 ++++---- packages/core/agent-loop/tests/cancel.spec.ts | 2 +- packages/core/agent-loop/tests/loop.spec.ts | 23 ++-- .../agent-loop/tests/review-fixes.spec.ts | 105 +++++++----------- packages/core/agent/src/types.ts | 52 ++++++--- 9 files changed, 176 insertions(+), 151 deletions(-) create mode 100644 docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md diff --git a/docs/architecture.md b/docs/architecture.md index 315715c828..c0d6351949 100644 --- a/docs/architecture.md +++ b/docs/architecture.md @@ -133,7 +133,7 @@ forever: drain queued → 'turn/start' → session('user/message'…) → emit agent/turn-start STEP loop: drain steering (late steering from previous step's listeners) - session('step/start'); emit agent/step-start + session('step/start') ⟵ durable step boundary (no agent/* mirror) assembly = ctx.systemPrompt.assemble() ⟵ waterfall system-prompt/assemble req = {model, system, tools, messages: session.deriveMessages(), signal} req = waterfall agent/request ⟵ hooks, compaction, model switch @@ -149,9 +149,9 @@ forever: tool execution may append tool-owned session events, e.g. `todo/write` session('tool/result') drain steering → session('steering/message'); emit agent/steering - emit agent/step-end + session('step/end') ⟵ durable step boundary (no agent/* mirror) cont = waterfall agent/turn-continuation(default = hadToolCalls || steered) - steering pending from step-end/continuation listeners forces cont = true + steering pending from continuation listeners forces cont = true if !cont: break session('turn/end'); emit agent/turn-end await ctx.parallel('session/flush', session) ⟵ durability checkpoint (failure @@ -191,7 +191,7 @@ Every MVP feature (including the TODO-marked ones), with the mechanism that impl | Hook system (user + project level) | listeners on `agent/request`, `agent/step-result`, `tools/execute`, `agent/turn-continuation`; a hooks plugin bridges config files to shell commands | | `/goal` | force-continue via `agent/turn-continuation` + `steer()` reminders | | `/loop` | on `agent/turn-end`, `send()` the next iteration; or force-continue | -| Dynamic workflow | orchestrator plugin on `agent/turn-end` / `agent/step-end` driving `send`/`steer` (+ sub-agents later) | +| Dynamic workflow | orchestrator plugin on `agent/turn-end` (or the `step/end` session event) driving `send`/`steer` (+ sub-agents later) | | Queued + steering messages | core `Agent.send()` / `Agent.steer()` | | Context compaction (auto + manual) | the `ctx.compact` seam ([dsh-compact](../packages/compact/compact)): a backend summarizes an older surface range into a single `user/message` `replace` op, bracketed by log-only `compact/*` events; auto = check token pressure at turn boundaries, manual = a `/compact` tool. See the [compaction capability-seam RFC](rfc/proposed/feature/2026-06-18-compaction-capability-seam.md) | | System prompt configurability | `ctx.systemPrompt.section()` with ordering | diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index 42c5f7440c..2ce45b4051 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages. Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:137`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:165`](../../packages/core/agent/src/types.ts) #### `agent/disposed` — emit @@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:143`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:171`](../../packages/core/agent/src/types.ts) #### `agent/error` — emit @@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:220`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:244`](../../packages/core/agent/src/types.ts) #### `agent/queued` — emit @@ -61,7 +61,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:156`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:184`](../../packages/core/agent/src/types.ts) #### `agent/request` — waterfall @@ -73,7 +73,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:189`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:213`](../../packages/core/agent/src/types.ts) #### `agent/status` — emit @@ -85,7 +85,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:150`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:178`](../../packages/core/agent/src/types.ts) #### `agent/steering` — emit @@ -97,19 +97,7 @@ Steering content was injected into a running turn. Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:214`](../../packages/core/agent/src/types.ts) - -#### `agent/step-end` — emit - -A step ended. - -```ts cordis-catalog -'agent/step-end'(agent: Agent, turn: number, step: number): void -``` - -Types: [Agent](../core-data-structures/core.md) - -Source: [`packages/core/agent/src/types.ts:180`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:238`](../../packages/core/agent/src/types.ts) #### `agent/step-result` — waterfall @@ -121,19 +109,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:195`](../../packages/core/agent/src/types.ts) - -#### `agent/step-start` — emit - -A step (one model call plus its tool dispatch) began. `step` is 1-based within the turn; a turn runs one or more steps. - -```ts cordis-catalog -'agent/step-start'(agent: Agent, turn: number, step: number): void -``` - -Types: [Agent](../core-data-structures/core.md) - -Source: [`packages/core/agent/src/types.ts:175`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:219`](../../packages/core/agent/src/types.ts) #### `agent/stream-chunk` — emit @@ -145,7 +121,7 @@ A raw StreamChunk arrived from the model (token-level UI/log feed). Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md) -Source: [`packages/core/agent/src/types.ts:209`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:233`](../../packages/core/agent/src/types.ts) #### `agent/turn-continuation` — waterfall @@ -157,11 +133,11 @@ Waterfall: override the turn-continuation decision. The default (computed by the Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:202`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:226`](../../packages/core/agent/src/types.ts) #### `agent/turn-end` — emit -A turn ended. `reason` distinguishes a clean stop from a truncated or aborted one (`completed` | `aborted` | `error` | `disposed` | `max-tokens`). +A turn ended. `reason` distinguishes a clean stop from a truncated, aborted, or hook-rejected one (`completed` | `aborted` | `error` | `disposed` | `max-tokens` | `rejected` | `interrupted`). ```ts cordis-catalog 'agent/turn-end'(agent: Agent, turn: number, reason: TurnEndReason): void @@ -169,7 +145,7 @@ A turn ended. `reason` distinguishes a clean stop from a truncated or aborted on Types: [Agent](../core-data-structures/core.md) · [TurnEndReason](../core-data-structures/session.md) -Source: [`packages/core/agent/src/types.ts:169`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:204`](../../packages/core/agent/src/types.ts) #### `agent/turn-start` — emit @@ -181,7 +157,7 @@ A turn began. `turn` is the 1-based turn number within the session. Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:163`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:197`](../../packages/core/agent/src/types.ts) ### `llm/*` diff --git a/docs/rfc/README.md b/docs/rfc/README.md index 52676cdebf..e27e83842e 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -120,6 +120,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Reorganize packages into a modular hierarchy](implemented/architecture/2026-06-20-package-hierarchy.md) | 2026-06-20 | | [Branded IDs everywhere they belong](implemented/architecture/2026-06-20-branded-ids.md) | 2026-06-20 | | [Extract example apps into packages](implemented/architecture/2026-06-20-extract-example-app-packages.md) | 2026-06-20 | +| [Event-domain semantics — session is the fact log, agent is the live surface](implemented/architecture/2026-06-30-event-domain-semantics.md) | 2026-06-30 | ### Process diff --git a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md new file mode 100644 index 0000000000..0cf1d68d7f --- /dev/null +++ b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md @@ -0,0 +1,39 @@ +# RFC: Event-domain semantics — session is the fact log, agent is the live surface + +Status: implemented (accepted 2026-06-30) + +## Context + +The harness extends the agent loop through a Cordis event taxonomy (see [the microkernel event-taxonomy RFC](2026-06-11-microkernel-event-taxonomy.md)). As that taxonomy grew, the line between the three event domains blurred: + +- `session/*` carries the durable, event-sourced log (`SessionEventMap`). +- `agent/*` carries live runtime signals that hand a plugin the `Agent` handle. +- `tools/*` carries the tool registry + execution seam. + +Two problems motivated pinning the semantics down. First, several turn/step boundaries existed BOTH as a durable `SessionEvent` (`turn/start`, `turn/end`, `step/start`, `step/end`) AND as a mirrored `agent/*` emit (`agent/turn-start`, `agent/turn-end`, `agent/step-start`, `agent/step-end`). A consumer had two sources of truth for the same fact, and every lifecycle change had to update both. Second, the upcoming Hooks subsystem needs ONE coherent, documented surface to subscribe to — a plugin author (and the Claude Code / Codex hook bridges built on top) must know, without reading the loop, whether to listen on a session event or an agent event, and why. + +This is the foundational change in a stack that adds a Hooks subsystem; it establishes the vocabulary the later PRs (interception-Decision reshape, the `hook/*` durable log, the bridges) build on. + +## Decision + +**Three domains, one job each, with a single boundary rule.** + +- **`session/*` — the durable, replayable FACT log.** Owns `SessionEventMap`; every entry is JSON-only (no live objects). One `session/event` emit per append, plus the `session/flush` parallel durability checkpoint. It is also the live transcript feed: a consumer that wants to render or react to what happened subscribes here, so live rendering and `session/load` replay share one path. +- **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/stream-chunk`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`, and the turn boundaries) that notify with the `Agent` in hand. +- **`tools/*` — the tool registry + execution seam.** + +**The boundary rule:** a durable, replayable fact is a `SessionEvent`; a live interception or a transient/live-object signal is an `agent`/`tools` Cordis event. A datum that is BOTH — a turn or step boundary — lives in the session log, and is mirrored as an `agent/*` emit ONLY where a live consumer provably needs the `Agent` handle at that instant. + +**Applying the rule to the boundary twins (prune case-by-case):** + +- `agent/turn-start` — **KEPT.** The stdio UI (`dsh-ui-stdio`) labels turn output by `agent.id`, which the `turn/start` session event does not carry. A genuine live-object need. +- `agent/turn-end` — **KEPT.** The stdio UI listens to print the next-prompt glyph. (Note: the ACP bridge does NOT settle on this event — it settles from `session/event` `turn/end` plus `agent/status`; the surviving justification is the stdio UI alone.) +- `agent/step-start`, `agent/step-end` — **REMOVED.** No production consumer needs the live `Agent` at a step boundary; a consumer that wants per-step boundaries reads the durable `step/start`/`step/end` session events. Removing the two emits also simplifies the loop's `closeStep` (one append, no paired emit). + +## Consequences + +- The loop no longer emits `agent/step-start`/`agent/step-end`; `closeStep` appends `step/end` only, and a throwing `step/end` session-event listener is the surviving step-boundary-listener failure path (contained by `closeStep` → `failTurn`, the turn closes balanced). +- Tests that observed step boundaries via the removed emits now observe the durable `step/start`/`step/end` session events — the behavior they pin (boundary ordering, step counting, a throwing boundary listener failing the turn balanced) is unchanged; only the feed they read moved to the canonical one. Per [AGENTS.md "tests document behavior, not golden truth"](../../../../AGENTS.md), the behavior and its test moved together. +- One behavior genuinely shifts and is documented in its test: a throwing `step/start` session-event listener throws INSIDE `session.append('step/start')`, before the loop marks the step open, so no `step/end` is owed (the old `agent/step-start` emit fired after the step was open). The turn still closes balanced with an error. +- This is a partial, conservative realization of the broader [proposed simplification "Stop mirroring durable boundaries as agent events"](../../proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md): that RFC proposes removing ALL boundary mirrors (including the turn boundaries and `agent/steering`) and migrating the stdio UI's turn rendering onto `session/event`. This RFC removes only the two step mirrors that have no live consumer; the turn mirrors stay until the stdio UI is migrated. The proposed RFC remains the home for finishing that migration. +- The cordis catalog (`docs/cordis-catalog/events-and-services.md`) is regenerated to drop the two events. diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index ceef1bca8e..28af01a027 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -147,7 +147,7 @@ export interface LoopHandle { * drain queued → 'turn/start' → session('user/message'…) → emit agent/turn-start * STEP loop: * drain steering → session('steering/message') ⟵ catches late steering - * session('step/start'); emit agent/step-start ⟵ append before emit (the event-sourcing RFC) + * session('step/start') ⟵ durable step boundary (no agent/* mirror) * assembly = ctx.systemPrompt.assemble() ⟵ waterfall system-prompt/assemble * req = {model, system, tools, messages: session.deriveMessages(), signal} * req = waterfall agent/request ⟵ hooks/compaction/model-switch @@ -159,7 +159,7 @@ export interface LoopHandle { * session('tool/call'); ctx.tools.execute() ⟵ waterfall tools/execute * session('tool/result') * drain steering → session('steering/message'); emit agent/steering - * emit agent/step-end + * session('step/end') ⟵ durable step boundary (no agent/* mirror) * cont = waterfall agent/turn-continuation(default = hadToolCalls || steered) * if !cont && steering arrived from step-end/continuation listeners: cont = true * if !cont: break @@ -279,33 +279,29 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, let stepOpen = false let errorReported = false - // Close the open step exactly once (idempotent via stepOpen). The - // agent/step-end emit is contained: a throwing step-end listener must not - // abort finalization and strand the turn open (turn/end balance > notifying - // one bad listener). Appended before the emit (the event-sourcing RFC append-before-emit). + // Close the open step exactly once (idempotent via stepOpen). Step boundaries + // are durable session events only — there is no agent/* step emit to mirror + // them (see the agent event-domain rule). A throwing step/end session-event + // listener must not abort finalization and strand the turn open (turn/end + // balance > notifying one bad listener); it is contained and surfaced as a + // turn error below. const closeStep = (): boolean => { if (!stepOpen) return false stepOpen = false // Session.append pushes step/end BEFORE notifying session/event listeners, // so a throwing listener leaves step/end in the log (balance holds) but // would otherwise abort finalization. Contain it and surface it as a turn - // error below — the same outcome as a throwing agent/step-end listener. + // error below. let failure: unknown try { session.append('step/end', { turn, step }) } catch (error: unknown) { failure = error } - try { - ctx.emit('agent/step-end', agent, turn, step) - } catch (error: unknown) { - failure ??= error - } - // A throwing step/end session-event listener OR a throwing agent/step-end - // listener surfaces as a turn error via failTurn (idempotent). This prevents - // a throwing listener from producing a silent "completed" turn when the step - // itself succeeded, AND keeps finalization going when closeStep runs from - // the outer catch. + // A throwing step/end session-event listener surfaces as a turn error via + // failTurn (idempotent). This prevents a throwing listener from producing a + // silent "completed" turn when the step itself succeeded, AND keeps + // finalization going when closeStep runs from the outer catch. if (failure !== undefined) { failTurn(toError(failure)) return true @@ -382,24 +378,23 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, while (true) { step += 1 - // Steering from the previous round's step-end/continuation listeners - // (or turn-start listeners on the first step) joins before the request. + // Steering from the previous round's continuation listeners (or + // turn-start listeners on the first step) joins before the request. drainSteering(ctx, agent, turn) session.append('step/start', { turn, step }) stepOpen = true - ctx.emit('agent/step-start', agent, turn, step) const abort = new AbortController() handle.setAbort(abort) // Cancel landing in the step-start window: a synchronous `agent/turn-start` - // or `agent/step-start` listener (both fire before this point) can have - // called `cancel()`, and `runStep` would otherwise run a full extra step - // with no AbortController having observed it. Check the marker AFTER - // setAbort (so the next-iteration drain sees a clean controller) and before - // `runStep`: drop the step, end the turn `aborted`. closeStep balances the - // already-appended step/start. + // listener (fires before this point) can have called `cancel()`, and + // `runStep` would otherwise run a full extra step with no AbortController + // having observed it. Check the marker AFTER setAbort (so the + // next-iteration drain sees a clean controller) and before `runStep`: drop + // the step, end the turn `aborted`. closeStep balances the already-appended + // step/start. if (handle.isCancelled()) { handle.setAbort(undefined) reason = { kind: 'aborted', reason: handle.cancelReason() } diff --git a/packages/core/agent-loop/tests/cancel.spec.ts b/packages/core/agent-loop/tests/cancel.spec.ts index 9cdaa1973b..775e08e6de 100644 --- a/packages/core/agent-loop/tests/cancel.spec.ts +++ b/packages/core/agent-loop/tests/cancel.spec.ts @@ -204,7 +204,7 @@ describe('Agent.cancel()', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) let steps = 0 - ctx.on('agent/step-start', () => { steps += 1 }) + ctx.on('session/event', (_session, event) => { if (event.type === 'step/start') steps += 1 }) const reasons: TurnEndReason[] = [] ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) diff --git a/packages/core/agent-loop/tests/loop.spec.ts b/packages/core/agent-loop/tests/loop.spec.ts index d018eff7a2..8d8224ad5f 100644 --- a/packages/core/agent-loop/tests/loop.spec.ts +++ b/packages/core/agent-loop/tests/loop.spec.ts @@ -46,15 +46,21 @@ describe('agent loop', () => { const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + // Turn boundaries are live agent/* emits; step boundaries are durable + // session events only (no agent/* mirror). Interleave both feeds in fire + // order to assert the full boundary nesting. const order: string[] = [] - for (const name of ['agent/turn-start', 'agent/step-start', 'agent/step-end', 'agent/turn-end'] as const) { + for (const name of ['agent/turn-start', 'agent/turn-end'] as const) { ctx.on(name, () => void order.push(name)) } + ctx.on('session/event', (_session, event) => { + if (event.type === 'step/start' || event.type === 'step/end') order.push(event.type) + }) send(agent, 'hi') await waitForIdle(ctx, agent) - expect(order).toEqual(['agent/turn-start', 'agent/step-start', 'agent/step-end', 'agent/turn-end']) + expect(order).toEqual(['agent/turn-start', 'step/start', 'step/end', 'agent/turn-end']) const types = agent.session.events.map(e => e.type) // turn/start opens the turn, THEN the queued user message is recorded inside @@ -269,7 +275,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) let steps = 0 - ctx.on('agent/step-end', () => void steps++) + ctx.on('session/event', (_session, event) => { if (event.type === 'step/end') steps++ }) ctx.on('agent/turn-continuation', async (_agent, _turn, _defaultDecision, next) => { if (steps < 3) return true return next() @@ -371,7 +377,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) let steps = 0 - ctx.on('agent/step-end', () => void steps++) + ctx.on('session/event', (_session, event) => { if (event.type === 'step/end') steps++ }) // Force exactly one continuation (step 1 → step 2), then defer to default // (step 2 is a plain stop with no tool calls → stops). ctx.on('agent/turn-continuation', async (_agent, _turn, _defaultDecision, next) => { @@ -536,7 +542,7 @@ describe('agent loop', () => { ]) }) - it('stops the turn when agent/step-end listener failure has recorded an error', async () => { + it('stops the turn when a step/end session-event listener failure has recorded an error', async () => { const adapter = new MockAdapter([ toolCallResponse('c1', 'echo', { text: 'x' }), textResponse('should not run'), @@ -552,8 +558,11 @@ describe('agent loop', () => { })) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) let threw = false - ctx.on('agent/step-end', () => { - if (!threw) { threw = true; throw new Error('bad step-end listener') } + // A throwing step/end session-event listener is the surviving boundary-listener + // failure path (step boundaries have no agent/* mirror): closeStep contains it + // and surfaces it as a turn error rather than stranding the turn open. + ctx.on('session/event', (_session, event) => { + if (event.type === 'step/end' && !threw) { threw = true; throw new Error('bad step/end listener') } }) send(agent, 'go') diff --git a/packages/core/agent-loop/tests/review-fixes.spec.ts b/packages/core/agent-loop/tests/review-fixes.spec.ts index a092bd8419..7ee4923ce8 100644 --- a/packages/core/agent-loop/tests/review-fixes.spec.ts +++ b/packages/core/agent-loop/tests/review-fixes.spec.ts @@ -144,36 +144,6 @@ describe('HIGH: abort during tool execution ends the turn', () => { }) describe('HIGH: steering from late extension points is never stranded', () => { - it('steer() from an agent/step-end listener reaches the next request (/goal pattern)', async () => { - const adapter = new MockAdapter([ - toolCallResponse('c1', 'echo', { text: 'x' }), - textResponse('after steering'), - ]) - const ctx = await harness(adapter) - ctx.tools.register(defineTool({ - name: 'echo', - description: '', - parameters: { text: { type: 'string' } }, - async execute(args) { - return [{ type: 'text', text: String(args.text) }] - }, - })) - const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - - let steeredOnce = false - ctx.on('agent/step-end', () => { - if (steeredOnce) return - steeredOnce = true - agent.steer([{ type: 'text', text: 'goal reminder from step-end' }]) - }) - - send(agent, 'go') - await waitForIdle(ctx, agent) - - expect(adapter.requests).toHaveLength(2) - expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('goal reminder from step-end') - }) - it('steer() from an agent/turn-continuation listener overrides a stop decision', async () => { const adapter = new MockAdapter([ textResponse('no tools, would stop here'), @@ -539,24 +509,26 @@ describe('HIGH: a finish-error stream chunk ends the turn as error, not complete }) }) -describe('P1-6: step/start is appended before agent/step-start is emitted', () => { - it('a step-start listener sees the step/start event already in session.events', async () => { +describe('P1-6: a step/start session-event listener sees the event already in the log', () => { + it('the step/start event is in session.events when its session/event listener fires', async () => { const adapter = new MockAdapter([textResponse('done')]) const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a-step-order'), { model: 'mock' }) - // Capture, at the moment agent/step-start fires, whether the matching - // step/start event is already in the log (append-before-emit, the event-sourcing RFC). + // Session.append pushes the event BEFORE notifying session/event listeners, + // so a step/start listener always finds the matching event already in the + // log. (Step boundaries have no agent/* mirror — the session log is the live + // feed.) const observed: { turn: number; step: number; lastEventType: string | undefined; sawStepStart: boolean }[] = [] - ctx.on('agent/step-start', (subject, turn, step) => { - if (subject !== agent) return - const events = [...subject.session.events] + ctx.on('session/event', (subject, event) => { + if (subject !== agent.session || event.type !== 'step/start') return + const events = [...subject.events] const last = events.at(-1) observed.push({ - turn, - step, + turn: event.data.turn, + step: event.data.step, lastEventType: last?.type, - sawStepStart: events.some(e => e.type === 'step/start' && e.data.turn === turn && e.data.step === step), + sawStepStart: events.some(e => e.type === 'step/start' && e.data.turn === event.data.turn && e.data.step === event.data.step), }) }) @@ -621,29 +593,35 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar expect(adapter.requests).toHaveLength(0) }) - it('a throwing agent/step-start listener closes the open step then the turn (step/end before turn/end)', async () => { + it('a throwing step/start session-event listener fails the turn balanced (no step stranded open)', async () => { const adapter = new MockAdapter([textResponse('never reached')]) const ctx = await balancedHarness(adapter) const agent = ctx.agentLoop.create(AgentId('a-stepstart'), { model: 'mock' }) + // Step boundaries have no agent/* mirror; a throwing step/start session-event + // listener is the surviving step-boundary-listener failure. The throw fires + // INSIDE session.append('step/start') — before the loop marks the step open — + // so the loop never had an open step to close (no step/end is owed). The + // throw drives the outer catch, which fails the turn balanced. The invariants + // oracle (balancedHarness) rejects any imbalance, so a green run proves the + // turn/start..turn/end nesting holds with a lone step/start and no step/end. let threw = false - ctx.on('agent/step-start', () => { if (!threw) { threw = true; throw new Error('boom step-start') } }) + ctx.on('session/event', (_s, event) => { + if (event.type === 'step/start' && !threw) { threw = true; throw new Error('boom step-start') } + }) const errors: Error[] = [] ctx.on('agent/error', (_a, _t, _s, error) => void errors.push(error)) send(agent, 'go') await waitForIdle(ctx, agent) - const e = [...agent.session.events] const c = boundaryCounts(agent) - expect(c).toMatchObject({ turnStart: 1, turnEnd: 1, stepStart: 1, stepEnd: 1, errors: 1 }) + // step/start was appended (Session.append pushes before notifying), but the + // listener throw pre-empted the loop marking the step open, so no step/end is + // owed; the turn still closes exactly once with an error, balanced. + expect(c).toMatchObject({ turnStart: 1, turnEnd: 1, stepStart: 1, stepEnd: 0, errors: 1 }) expect(errors.map(x => x.message)).toEqual(['boom step-start']) - // step/end must precede turn/end (the invariants oracle would reject - // turn/end-while-step-open, but assert the order explicitly too). - const stepEndIdx = e.findIndex(x => x.type === 'step/end') - const turnEndIdx = e.findIndex(x => x.type === 'turn/end') - expect(stepEndIdx).toBeGreaterThanOrEqual(0) - expect(stepEndIdx).toBeLessThan(turnEndIdx) + expect(c.lastTurnEnd?.type === 'turn/end' && c.lastTurnEnd.data.reason.kind).toBe('error') }) it('a throwing agent/error listener during a step-error path still balances the turn, loop survives', async () => { @@ -829,17 +807,20 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar expect(boundaryCounts(agent).turnEnd).toBe(2) }) - it('a throwing agent/step-end listener during a successful step ends the turn as error, not completed', async () => { - // closeStep() must surface a throwing step-end listener via failTurn so the + it('a throwing step/end session-event listener during a successful step ends the turn as error, not completed', async () => { + // closeStep() must surface a throwing step/end listener via failTurn so the // turn ends with reason error, not a silent "completed" with the throw // swallowed. Regression test for the closeStep() catch that previously - // swallowed the throw in the normal (no-tool, no-steering) path. + // swallowed the throw in the normal (no-tool, no-steering) path. (Step + // boundaries have no agent/* mirror; the session-event listener is the path.) const adapter = new MockAdapter([textResponse('all good'), textResponse('turn 2 ok')]) const ctx = await balancedHarness(adapter) const agent = ctx.agentLoop.create(AgentId('a-stepend-throw'), { model: 'mock' }) let threw = false - ctx.on('agent/step-end', () => { if (!threw) { threw = true; throw new Error('boom step-end') } }) + ctx.on('session/event', (_s, event) => { + if (event.type === 'step/end' && !threw) { threw = true; throw new Error('boom step-end') } + }) const errors: Error[] = [] ctx.on('agent/error', (_a, _t, _s, error) => void errors.push(error)) @@ -903,18 +884,18 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar }) it('a throwing session/event listener on step/end during finalization still appends turn/end', async () => { - // A throwing agent/step-start listener drives the outer catch, which calls - // closeStep() during finalization. closeStep appends step/end; a + // A finish-error stream opens a step then fails it, driving finalization + // through closeStep() with the step open. closeStep appends step/end; a // session/event listener throwing on THAT must not abort the catch before - // closeTurn(false) — step/end is already logged (balance holds) and the - // throw is contained + surfaced via failTurn, so turn/end is still appended. - const adapter = new MockAdapter([textResponse('never reached')]) + // closeTurn — step/end is already logged (balance holds) and the throw is + // contained + surfaced via failTurn, so turn/end is still appended. (The + // failed step itself also routes through failTurn; the step/end-listener + // throw is the second, contained, failure.) + const errorStream: StreamChunk[] = [{ type: 'finish', reason: { kind: 'error', message: 'provider 500' } }] + const adapter = new MockAdapter([errorStream, textResponse('turn 2 ok')]) const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a-stependthrow'), { model: 'mock' }) - // Open a step, then make the agent/step-start emit throw (boundary throw → - // outer catch → closeStep during finalization). - ctx.on('agent/step-start', () => { throw new Error('boom step-start') }) let threw = false ctx.on('session/event', (_s, event) => { if (!threw && event.type === 'step/end') { threw = true; throw new Error('boom step/end listener') } diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts index efe392155c..2bd550a109 100644 --- a/packages/core/agent/src/types.ts +++ b/packages/core/agent/src/types.ts @@ -6,6 +6,34 @@ * Merge-extensible: `AgentOptions` supports declaration merging for * plugin-specific creation options. * + * ## Event-domain semantics (the boundary rule) + * + * The harness has three event domains, each with one job: + * + * - **`session/*`** (`@deepseek-ai/dsh-session`) — the DURABLE, replayable FACT + * log. Owns `SessionEventMap`; every entry is JSON-only (no live objects). + * One `session/event` emit per append, plus the `session/flush` parallel + * durability checkpoint. Answers "what happened, durably/replayably." A + * consumer that wants the live transcript subscribes here. + * - **`agent/*`** (this module) — the LIVE runtime surface. Always carries the + * live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, + * `agent/step-result`, `agent/turn-continuation`) that mutate/veto, and + * TRANSIENT emits (`agent/status`, `agent/stream-chunk`, `agent/error`, + * `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`, and the + * turn boundaries) that notify with the `Agent` in hand. Answers "right now, + * with the agent object — intercept or observe." + * - **`tools/*`** (`@deepseek-ai/dsh-tools`) — the tool registry + execution. + * + * **The rule:** a durable, replayable fact is a SessionEvent; a live + * interception or a transient/live-object signal is an `agent`/`tools` Cordis + * event. A datum that is BOTH (a turn/step boundary) lives in the session log, + * and is mirrored as an `agent/*` emit ONLY where a live consumer provably + * needs the `Agent` handle at that instant. Turn boundaries are so mirrored + * (the stdio UI labels output by `agent.id`); step boundaries are NOT (no live + * consumer needs them — read `step/start`/`step/end` from the session log). + * See `docs/rfc/implemented/architecture/2026-06-11-microkernel-event-taxonomy.md` + * and the related `docs/rfc/proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md`. + * * @module @deepseek-ai/dsh-agent/types */ @@ -155,29 +183,25 @@ declare module 'cordis' { */ 'agent/queued'(agent: Agent, content: ContentBlock[], info: { source: MessageSource; steering: boolean }): void - // ---- turn/step boundaries (emit) ---- + // ---- turn boundaries (emit) — the live boundary surface ---- + // Step boundaries are NOT mirrored here: a consumer that needs per-step + // boundaries reads the durable `step/start`/`step/end` session events (the + // session log is the live transcript feed). The TURN boundaries stay as + // agent/* emits because the only live consumer (the stdio UI) needs the + // `Agent` handle at the boundary to label output, which the session event + // does not carry. See the module doc's three-domain rule. /** * A turn began. `turn` is the 1-based turn number within the session. * @mode emit */ 'agent/turn-start'(agent: Agent, turn: number): void /** - * A turn ended. `reason` distinguishes a clean stop from a truncated or - * aborted one (`completed` | `aborted` | `error` | `disposed` | `max-tokens`). + * A turn ended. `reason` distinguishes a clean stop from a truncated, + * aborted, or hook-rejected one (`completed` | `aborted` | `error` | + * `disposed` | `max-tokens` | `rejected` | `interrupted`). * @mode emit */ 'agent/turn-end'(agent: Agent, turn: number, reason: TurnEndReason): void - /** - * A step (one model call plus its tool dispatch) began. `step` is 1-based - * within the turn; a turn runs one or more steps. - * @mode emit - */ - 'agent/step-start'(agent: Agent, turn: number, step: number): void - /** - * A step ended. - * @mode emit - */ - 'agent/step-end'(agent: Agent, turn: number, step: number): void // ---- interception seams (waterfall) ---- /** From 8df89d8e3334b75a47b8c358990a69a3cfa13a49 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 12:19:18 +0800 Subject: [PATCH 02/47] =?UTF-8?q?fix(events):=20address=20Codex=20review?= =?UTF-8?q?=20=E2=80=94=20balance=20step=20on=20step/start-listener=20thro?= =?UTF-8?q?w,=20restore=20/goal=20guard?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex review of PR-A found three blockers: - A throwing step/start session-event listener left an unbalanced log (turn/start → step/start → turn/end with no step/end), which the invariants oracle rejects — masked because that rejection was itself contained as a throwing turn/end listener. Fix the root cause in the loop: mark the step open BEFORE appending step/start (Session.append pushes before notifying), so the outer catch's closeStep() appends the balancing step/end. The test now asserts the balanced outcome (stepEnd:1, step/end before turn/end); proven load-bearing (revert the reorder → the test goes red with stepEnd:0). - Reintroduce the /goal-pattern guard deleted in the prior commit, migrated to a step/end session-event listener (the surviving step-boundary hook point), with a no-tools first step so it exercises the hasSteering continuation override. - Update packages/core/agent/README.md: step boundaries are no longer agent/* emits. --- packages/core/agent-loop/src/loop.ts | 7 ++- .../agent-loop/tests/review-fixes.spec.ts | 57 +++++++++++++++---- packages/core/agent/README.md | 5 +- 3 files changed, 54 insertions(+), 15 deletions(-) diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index 28af01a027..dad1ed9320 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -382,8 +382,13 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, // turn-start listeners on the first step) joins before the request. drainSteering(ctx, agent, turn) - session.append('step/start', { turn, step }) + // Mark the step open BEFORE the append: Session.append pushes the event + // to the log before notifying session/event listeners, so a THROWING + // step/start listener leaves step/start in the log. Setting stepOpen first + // means the outer catch's closeStep() then appends the balancing step/end + // (turn stays enclosed) instead of stranding an open step under turn/end. stepOpen = true + session.append('step/start', { turn, step }) const abort = new AbortController() handle.setAbort(abort) diff --git a/packages/core/agent-loop/tests/review-fixes.spec.ts b/packages/core/agent-loop/tests/review-fixes.spec.ts index 7ee4923ce8..28d5134cf8 100644 --- a/packages/core/agent-loop/tests/review-fixes.spec.ts +++ b/packages/core/agent-loop/tests/review-fixes.spec.ts @@ -169,6 +169,35 @@ describe('HIGH: steering from late extension points is never stranded', () => { expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('one more thing') }) + it('steer() from a step/end session-event listener reaches the next request (/goal pattern)', async () => { + // The /goal pattern steers from a step boundary so the model addresses a + // standing goal before stopping. Step boundaries have no agent/* mirror, so + // the surviving hook point is the durable step/end session event. With a + // no-tools first step the default continuation is stop; the steering queued + // here must force the hasSteering override and reach the next request. + const adapter = new MockAdapter([ + textResponse('no tools, would stop'), + textResponse('after goal reminder'), + ]) + const ctx = await harness(adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + let steeredOnce = false + ctx.on('session/event', (subject, event) => { + if (subject !== agent.session || event.type !== 'step/end' || steeredOnce) return + steeredOnce = true + agent.steer([{ type: 'text', text: 'goal reminder from step/end' }]) + }) + + send(agent, 'go') + await waitForIdle(ctx, agent) + + // steering from the step/end listener forced a second step (hasSteering + // override) and reached the next model request. + expect(adapter.requests).toHaveLength(2) + expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('goal reminder from step/end') + }) + it('steer() from an agent/turn-end listener becomes a queued message for the next turn', async () => { const adapter = new MockAdapter([textResponse('turn 1'), textResponse('turn 2')]) const ctx = await harness(adapter) @@ -593,18 +622,19 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar expect(adapter.requests).toHaveLength(0) }) - it('a throwing step/start session-event listener fails the turn balanced (no step stranded open)', async () => { + it('a throwing step/start session-event listener closes the open step then the turn (step/end before turn/end)', async () => { const adapter = new MockAdapter([textResponse('never reached')]) const ctx = await balancedHarness(adapter) const agent = ctx.agentLoop.create(AgentId('a-stepstart'), { model: 'mock' }) // Step boundaries have no agent/* mirror; a throwing step/start session-event - // listener is the surviving step-boundary-listener failure. The throw fires - // INSIDE session.append('step/start') — before the loop marks the step open — - // so the loop never had an open step to close (no step/end is owed). The - // throw drives the outer catch, which fails the turn balanced. The invariants - // oracle (balancedHarness) rejects any imbalance, so a green run proves the - // turn/start..turn/end nesting holds with a lone step/start and no step/end. + // listener is the surviving step-boundary-listener failure. The loop marks + // the step open BEFORE appending step/start (Session.append pushes before + // notifying, so a post-push listener throw still leaves stepOpen=true), so + // the outer catch's closeStep() appends the balancing step/end — the turn + // stays enclosed. The invariants oracle (balancedHarness) rejects any + // imbalance, so a green run proves turn/start → step/start → step/end → + // turn/end nesting holds. let threw = false ctx.on('session/event', (_s, event) => { if (event.type === 'step/start' && !threw) { threw = true; throw new Error('boom step-start') } @@ -615,13 +645,16 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar send(agent, 'go') await waitForIdle(ctx, agent) + const e = [...agent.session.events] const c = boundaryCounts(agent) - // step/start was appended (Session.append pushes before notifying), but the - // listener throw pre-empted the loop marking the step open, so no step/end is - // owed; the turn still closes exactly once with an error, balanced. - expect(c).toMatchObject({ turnStart: 1, turnEnd: 1, stepStart: 1, stepEnd: 0, errors: 1 }) + expect(c).toMatchObject({ turnStart: 1, turnEnd: 1, stepStart: 1, stepEnd: 1, errors: 1 }) expect(errors.map(x => x.message)).toEqual(['boom step-start']) - expect(c.lastTurnEnd?.type === 'turn/end' && c.lastTurnEnd.data.reason.kind).toBe('error') + // step/end precedes turn/end (the invariants oracle would reject + // turn/end-while-step-open, but assert the order explicitly too). + const stepEndIdx = e.findIndex(x => x.type === 'step/end') + const turnEndIdx = e.findIndex(x => x.type === 'turn/end') + expect(stepEndIdx).toBeGreaterThanOrEqual(0) + expect(stepEndIdx).toBeLessThan(turnEndIdx) }) it('a throwing agent/error listener during a step-error path still balances the turn, loop survives', async () => { diff --git a/packages/core/agent/README.md b/packages/core/agent/README.md index d0ec0ee614..1d1b839da3 100644 --- a/packages/core/agent/README.md +++ b/packages/core/agent/README.md @@ -32,10 +32,11 @@ The full `agent/*` event taxonomy is declared via declaration merging in `dsh-ag - `agent/status` — idle / running / disposed transition - `agent/queued` — message entered inbox (source-resolved, steering flag) -#### Turn/step boundaries (emit) +#### Turn boundaries (emit) - `agent/turn-start`, `agent/turn-end` (carries `TurnEndReason`) -- `agent/step-start`, `agent/step-end` + +Step boundaries are NOT mirrored as `agent/*` emits: a consumer that needs per-step boundaries reads the durable `step/start`/`step/end` session events (the session log is the live boundary feed). The turn boundaries stay as `agent/*` emits because the stdio UI needs the `Agent` handle (`agent.id`) at the boundary, which the session event does not carry. See [the event-domain-semantics RFC](../../../docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md). #### Interception seams (waterfall) From a821dcbe0d4154394b0265737fba1643506e191c Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 12:46:59 +0800 Subject: [PATCH 03/47] =?UTF-8?q?fix(events):=20address=20Codex=20confirma?= =?UTF-8?q?tion=20review=20=E2=80=94=20strengthen=20/goal=20guard,=20fix?= =?UTF-8?q?=20doc=20drift?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Second-round Codex review of the PR-A taxonomy change found four issues, all verified against the code: - The /goal regression guard asserted only that the steered content reached requests[1], which passes even with the hasSteering override (loop.ts) disabled: leftover steering is re-enqueued as a next-turn queued message and also lands in requests[1], one turn later. The guard now asserts the same-turn shape — ONE turn, TWO steps, a steering/message recorded before step 2 — which is the mechanism the override drives. Proven to fail red with the override disabled. - The event-domain-semantics RFC's consequence list still described the pre-fix behavior (step marked open AFTER step/start, so no step/end owed). It now states the shipped behavior: the loop marks the step open BEFORE the append, so a throwing step/start listener gets a balancing step/end via closeStep(). - architecture.md's loop pseudocode said only continuation listeners force continuation; step/end session-event listeners (the /goal pattern) do too. - The agent/turn-end JSDoc listed a `rejected` TurnEndReason that does not exist on this branch (it belongs to the later interception work). Removed it and regenerated the cordis catalog; `interrupted` (a real variant) stays. --- docs/architecture.md | 3 ++- docs/cordis-catalog/events-and-services.md | 16 +++++------ .../2026-06-30-event-domain-semantics.md | 2 +- .../agent-loop/tests/review-fixes.spec.ts | 27 ++++++++++++++++--- packages/core/agent/src/types.ts | 5 ++-- 5 files changed, 37 insertions(+), 16 deletions(-) diff --git a/docs/architecture.md b/docs/architecture.md index c0d6351949..67d6a06a20 100644 --- a/docs/architecture.md +++ b/docs/architecture.md @@ -151,7 +151,8 @@ forever: drain steering → session('steering/message'); emit agent/steering session('step/end') ⟵ durable step boundary (no agent/* mirror) cont = waterfall agent/turn-continuation(default = hadToolCalls || steered) - steering pending from continuation listeners forces cont = true + steering pending forces cont = true (from continuation listeners OR from + step/end session-event listeners — the /goal pattern; hasSteering override) if !cont: break session('turn/end'); emit agent/turn-end await ctx.parallel('session/flush', session) ⟵ durability checkpoint (failure diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index 2ce45b4051..3fac9263db 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:244`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:245`](../../packages/core/agent/src/types.ts) #### `agent/queued` — emit @@ -73,7 +73,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:213`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:214`](../../packages/core/agent/src/types.ts) #### `agent/status` — emit @@ -97,7 +97,7 @@ Steering content was injected into a running turn. Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:238`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:239`](../../packages/core/agent/src/types.ts) #### `agent/step-result` — waterfall @@ -109,7 +109,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:219`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:220`](../../packages/core/agent/src/types.ts) #### `agent/stream-chunk` — emit @@ -121,7 +121,7 @@ A raw StreamChunk arrived from the model (token-level UI/log feed). Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md) -Source: [`packages/core/agent/src/types.ts:233`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:234`](../../packages/core/agent/src/types.ts) #### `agent/turn-continuation` — waterfall @@ -133,11 +133,11 @@ Waterfall: override the turn-continuation decision. The default (computed by the Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:226`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:227`](../../packages/core/agent/src/types.ts) #### `agent/turn-end` — emit -A turn ended. `reason` distinguishes a clean stop from a truncated, aborted, or hook-rejected one (`completed` | `aborted` | `error` | `disposed` | `max-tokens` | `rejected` | `interrupted`). +A turn ended. `reason` distinguishes a clean stop from a truncated, aborted, failed, disposed, or crash-interrupted one (`completed` | `aborted` | `error` | `disposed` | `max-tokens` | `interrupted`); the reason union is merge-extensible, so a plugin can add further variants. ```ts cordis-catalog 'agent/turn-end'(agent: Agent, turn: number, reason: TurnEndReason): void @@ -145,7 +145,7 @@ A turn ended. `reason` distinguishes a clean stop from a truncated, aborted, or Types: [Agent](../core-data-structures/core.md) · [TurnEndReason](../core-data-structures/session.md) -Source: [`packages/core/agent/src/types.ts:204`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:205`](../../packages/core/agent/src/types.ts) #### `agent/turn-start` — emit diff --git a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md index 0cf1d68d7f..c33ff3d5b3 100644 --- a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md +++ b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md @@ -34,6 +34,6 @@ This is the foundational change in a stack that adds a Hooks subsystem; it estab - The loop no longer emits `agent/step-start`/`agent/step-end`; `closeStep` appends `step/end` only, and a throwing `step/end` session-event listener is the surviving step-boundary-listener failure path (contained by `closeStep` → `failTurn`, the turn closes balanced). - Tests that observed step boundaries via the removed emits now observe the durable `step/start`/`step/end` session events — the behavior they pin (boundary ordering, step counting, a throwing boundary listener failing the turn balanced) is unchanged; only the feed they read moved to the canonical one. Per [AGENTS.md "tests document behavior, not golden truth"](../../../../AGENTS.md), the behavior and its test moved together. -- One behavior genuinely shifts and is documented in its test: a throwing `step/start` session-event listener throws INSIDE `session.append('step/start')`, before the loop marks the step open, so no `step/end` is owed (the old `agent/step-start` emit fired after the step was open). The turn still closes balanced with an error. +- The loop marks the step open (`stepOpen = true`) BEFORE appending `step/start`, because `Session.append` pushes the event to the log before notifying `session/event` listeners (validation throws happen earlier, before the push — see [the session append contract](../../../core-data-structures/session.md)). So a throwing `step/start` session-event listener runs with the step already open and the event already in the log: the loop's outer catch then calls `closeStep()`, which appends the balancing `step/end`, and the turn closes balanced with an error (`turn/start → step/start → step/end → turn/end` — verified by the invariants oracle in the regression test). Closing the open step is owed precisely because the marker is set first. - This is a partial, conservative realization of the broader [proposed simplification "Stop mirroring durable boundaries as agent events"](../../proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md): that RFC proposes removing ALL boundary mirrors (including the turn boundaries and `agent/steering`) and migrating the stdio UI's turn rendering onto `session/event`. This RFC removes only the two step mirrors that have no live consumer; the turn mirrors stay until the stdio UI is migrated. The proposed RFC remains the home for finishing that migration. - The cordis catalog (`docs/cordis-catalog/events-and-services.md`) is regenerated to drop the two events. diff --git a/packages/core/agent-loop/tests/review-fixes.spec.ts b/packages/core/agent-loop/tests/review-fixes.spec.ts index 28d5134cf8..ab421aaa2e 100644 --- a/packages/core/agent-loop/tests/review-fixes.spec.ts +++ b/packages/core/agent-loop/tests/review-fixes.spec.ts @@ -169,12 +169,22 @@ describe('HIGH: steering from late extension points is never stranded', () => { expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('one more thing') }) - it('steer() from a step/end session-event listener reaches the next request (/goal pattern)', async () => { + it('steer() from a step/end session-event listener forces a SAME-TURN next step (/goal pattern)', async () => { // The /goal pattern steers from a step boundary so the model addresses a // standing goal before stopping. Step boundaries have no agent/* mirror, so // the surviving hook point is the durable step/end session event. With a // no-tools first step the default continuation is stop; the steering queued - // here must force the hasSteering override and reach the next request. + // here must force the `!shouldContinue && hasSteering` override so the SAME + // turn runs another step. + // + // The override is what this test guards, so it asserts the same-turn shape — + // NOT merely that the content reaches requests[1]. Without the override the + // turn would stop, and leftover steering is re-enqueued as a next-turn queued + // message, which ALSO lands in requests[1] (just one turn later). So a + // content-only assertion passes with the override disabled and guards + // nothing. The discriminator is the turn/step shape: override ⇒ ONE turn with + // TWO steps and the steering recorded as a `steering/message` BEFORE step 2; + // re-enqueue fallback ⇒ TWO turns. const adapter = new MockAdapter([ textResponse('no tools, would stop'), textResponse('after goal reminder'), @@ -192,8 +202,17 @@ describe('HIGH: steering from late extension points is never stranded', () => { send(agent, 'go') await waitForIdle(ctx, agent) - // steering from the step/end listener forced a second step (hasSteering - // override) and reached the next model request. + // Same-turn continuation: the steering forced step 2 within turn 1. + const events = [...agent.session.events] + expect(events.filter(e => e.type === 'turn/start')).toHaveLength(1) + expect(events.filter(e => e.type === 'step/start')).toHaveLength(2) + // The steered content is recorded as steering (same turn), BEFORE step 2 — + // not as a fresh turn's user/message. This is the mechanism the override uses. + const steeringIdx = events.findIndex(e => e.type === 'steering/message') + const step2Idx = events.map(e => e.type).lastIndexOf('step/start') + expect(steeringIdx).toBeGreaterThanOrEqual(0) + expect(steeringIdx).toBeLessThan(step2Idx) + // and it reached the next model request. expect(adapter.requests).toHaveLength(2) expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('goal reminder from step/end') }) diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts index 2bd550a109..6c3f2b8226 100644 --- a/packages/core/agent/src/types.ts +++ b/packages/core/agent/src/types.ts @@ -197,8 +197,9 @@ declare module 'cordis' { 'agent/turn-start'(agent: Agent, turn: number): void /** * A turn ended. `reason` distinguishes a clean stop from a truncated, - * aborted, or hook-rejected one (`completed` | `aborted` | `error` | - * `disposed` | `max-tokens` | `rejected` | `interrupted`). + * aborted, failed, disposed, or crash-interrupted one (`completed` | + * `aborted` | `error` | `disposed` | `max-tokens` | `interrupted`); the + * reason union is merge-extensible, so a plugin can add further variants. * @mode emit */ 'agent/turn-end'(agent: Agent, turn: number, reason: TurnEndReason): void From b8d0da9f8c493fadbf4fdfd013ce1378bfc357e2 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 13:02:56 +0800 Subject: [PATCH 04/47] docs(loop): clarify the /goal steering comment names the step/end session event The continuation-override comment said "step-end/continuation listeners". With no agent/step-end emit, the surviving step-boundary listener is the durable step/end SESSION event, so spell it "step/end session-event/continuation listeners" to avoid implying a removed agent/* mirror. Comment-only; no behavior change. --- packages/core/agent-loop/src/loop.ts | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index dad1ed9320..7ee480d570 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -161,7 +161,7 @@ export interface LoopHandle { * drain steering → session('steering/message'); emit agent/steering * session('step/end') ⟵ durable step boundary (no agent/* mirror) * cont = waterfall agent/turn-continuation(default = hadToolCalls || steered) - * if !cont && steering arrived from step-end/continuation listeners: cont = true + * if !cont && steering arrived from step/end session-event/continuation listeners: cont = true * if !cont: break * session('turn/end'); emit agent/turn-end * await ctx.parallel('session/flush', session) ⟵ durability checkpoint @@ -461,9 +461,9 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, break } - // Steering from step-end/continuation listeners (the /goal pattern) - // demands the model see it — it overrides a negative decision; the - // next iteration's drain records it. + // Steering from step/end session-event or continuation listeners (the + // /goal pattern) demands the model see it — it overrides a negative + // decision; the next iteration's drain records it. if (!shouldContinue && agent.inbox.hasSteering) shouldContinue = true // A cancel that landed during the continuation window — after the step's From 13c6e847a263b9d3e5835890b768fb0779025144 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 13:52:25 +0800 Subject: [PATCH 05/47] feat(bash): add stdin + extra env to the executor seam as a trusted-plugin surface MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The hooks subsystem runs external hook commands the Claude Code / Codex way: JSON payload on stdin, context in CLAUDE_PROJECT_DIR / CLAUDE_PLUGIN_ROOT env. Reusing the ctx.bash seam for that needs two new inputs — but stdin and arbitrary env are exactly what dsh-bash-local's credential scrub exists to keep away from model-driven commands. So this adds them as a TRUSTED-PLUGIN surface: - BashExecRequest + BashExecSpec gain optional `stdin` and `env`. They are plain optionals on the resolved spec (not required-but-nullable like `owner`): a missing one means "none", the safe default, not a security footgun. - dsh-bash-local threads them through resolve/run/start. `env` merges AFTER the credential scrub, so a trusted caller's explicit entry wins even on a credential-shaped name — the scrub guards the harness's OWN ambient creds from model-driven commands, not a trusted plugin. stdin is always a pipe, closed immediately (with bytes when supplied, empty otherwise — EOF as before); an EPIPE from a child that exits without reading is swallowed. - The model-facing dsh-tool-bash NEVER forwards model input into stdin/env (its request is command/workdir/timeoutMs/signal/owner only). A regression guard drives the real tool with adversarial args and asserts the request carries neither field — proven to go red if the consumer ever forwards them. Configurable scrub (in an earlier sketch) is dropped as speculative: the explicit `env` field already gives a trusted caller full control, and no caller needs to broaden the ambient scrub. Documented in a new architecture RFC, the bash.md type-equiv blocks, and the three bash READMEs. --- docs/core-data-structures/bash.md | 36 +++++++ docs/rfc/README.md | 1 + ...0-bash-stdin-env-trusted-plugin-surface.md | 33 +++++++ packages/bash/bash-local/README.md | 2 +- packages/bash/bash-local/src/index.ts | 8 ++ packages/bash/bash-local/src/run.ts | 44 ++++++++- .../bash/bash-local/tests/executor.spec.ts | 30 ++++++ packages/bash/bash-local/tests/run.spec.ts | 43 +++++++++ packages/bash/bash/README.md | 4 +- packages/bash/bash/src/types.ts | 34 +++++++ packages/bash/tool-bash/README.md | 4 + packages/bash/tool-bash/tests/tools.spec.ts | 96 +++++++++++++++++++ 12 files changed, 328 insertions(+), 7 deletions(-) create mode 100644 docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md diff --git a/docs/core-data-structures/bash.md b/docs/core-data-structures/bash.md index 807c7401fc..2e0c8de3a4 100644 --- a/docs/core-data-structures/bash.md +++ b/docs/core-data-structures/bash.md @@ -17,6 +17,23 @@ interface BashExecRequest { timeoutMs?: number | undefined /** Abort signal — implementations kill the command when it fires. */ signal?: AbortSignal | undefined + /** + * Bytes to write to the command's stdin, then close it. Absent leaves stdin + * closed/empty (the default for model-driven tool calls). A TRUSTED-PLUGIN + * surface: the model-facing bash tool does NOT thread model-supplied input + * here — it is set by in-process plugins (e.g. the hooks bridges, which write + * a hook command's JSON payload to its stdin). + */ + stdin?: string | undefined + /** + * Extra environment entries for the command, merged AFTER the + * implementation's credential scrub (so an explicit entry here is honored even + * when its name matches the scrub pattern — the caller takes responsibility). + * Like {@link stdin}, a TRUSTED-PLUGIN surface: the model-facing bash tool + * never forwards model-supplied env; in-process plugins (the hooks bridges) + * set hook env vars (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, …) here. + */ + env?: Record | undefined /** * Opaque OWNER token for a background task — the consumer's isolation key * (the tool layer passes the owning agent's `session.header.id`). The @@ -36,6 +53,23 @@ interface BashExecSpec { timeoutMs: number /** Abort signal — implementations kill the command when it fires. */ signal?: AbortSignal | undefined + /** + * Bytes to write to the command's stdin (then close it), carried through + * verbatim from {@link BashExecRequest.stdin}. OPTIONAL on the resolved spec + * (unlike `owner`): it has no config default, so a missing one means "no + * stdin" — the safe, ordinary case — not a silent footgun, so it stays a + * plain optional rather than required-but-nullable. A TRUSTED-PLUGIN surface + * (see the request field). + */ + stdin?: string | undefined + /** + * Extra environment entries, carried through verbatim from + * {@link BashExecRequest.env} and merged by the implementation AFTER its + * credential scrub (an explicit entry wins even when its name matches the + * scrub pattern). OPTIONAL on the spec for the same reason as `stdin` — no + * config default, absent means "no extra env". A TRUSTED-PLUGIN surface. + */ + env?: Record | undefined /** * Opaque owner token, REQUIRED-but-nullable (mirrors `workdir`/`timeoutMs` * being required on the resolved spec): {@link BashExecutor.resolve} carries @@ -50,6 +84,8 @@ interface BashExecSpec { The `owner` token is the isolation key: the executor stores it but never interprets it (access policy is the consumer's job), so a background task started by one agent isn't readable cross-session. A required-but-nullable field makes a forgotten owner a visible `undefined` rather than a silently-unowned task. +`stdin` and `env` are a **trusted-plugin surface**: an in-process plugin (the hooks bridges, native plugins) sets them to feed a hook command its JSON payload on stdin and its `CLAUDE_PROJECT_DIR`/`CLAUDE_PLUGIN_ROOT` env. The model-facing `dsh-tool-bash` tool deliberately NEVER forwards model input into either field — its request is built from `command`/`workdir`/`timeoutMs`/`signal`/`owner` only — so a model cannot smuggle an env var or stdin payload past the credential scrub (a guard test asserts this). `env` is merged AFTER the scrub so a trusted caller can set even a credential-shaped var; the scrub's job is to stop the harness's OWN ambient credentials leaking into model-driven commands, not to constrain a trusted plugin. + Both ids the seam handles are [branded](core.md) (zero-cost `string` brands, the same machinery as `SessionId`/`AgentId`): `BashTaskId` (a tracked background task, generated `bash-N` by the local executor) and `OwnerToken` (the opaque isolation key). `OwnerToken` is deliberately a DISTINCT brand from `SessionId`, not an alias: the bash seam is a capability seam that must not know what an owner token *means*, so it never imports `dsh-session`'s vocabulary — the `dsh-tool-bash` consumer is the single boundary that casts the owning agent's `SessionId` into an `OwnerToken`. Branding both stops a raw `string` (or a `BashTaskId` where an `OwnerToken` is expected, or vice versa) from slipping through the type checker on the model-facing `task_id` path. ## Foreground runs: `BashRunResult` diff --git a/docs/rfc/README.md b/docs/rfc/README.md index e27e83842e..9b1996e89b 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -121,6 +121,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Branded IDs everywhere they belong](implemented/architecture/2026-06-20-branded-ids.md) | 2026-06-20 | | [Extract example apps into packages](implemented/architecture/2026-06-20-extract-example-app-packages.md) | 2026-06-20 | | [Event-domain semantics — session is the fact log, agent is the live surface](implemented/architecture/2026-06-30-event-domain-semantics.md) | 2026-06-30 | +| [stdin + extra env on the bash seam — a trusted-plugin surface](implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md) | 2026-06-30 | ### Process diff --git a/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md b/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md new file mode 100644 index 0000000000..ce1c8df0be --- /dev/null +++ b/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md @@ -0,0 +1,33 @@ +# RFC: stdin + extra env on the bash seam — a trusted-plugin surface + +Status: implemented (accepted 2026-06-30) + + + +## Context + +The hooks subsystem (stack PR-A…PR-F) runs external hook commands the way Claude Code and Codex do: a hook is a shell command that receives its event payload as **JSON on stdin** and reads context from a handful of **environment variables** (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, `PLUGIN_ROOT`, …). The harness already has a perfectly good command runner behind the `ctx.bash` capability seam ([dsh-bash](../../../../packages/bash/bash) → [dsh-bash-local](../../../../packages/bash/bash-local)), with process-group kills, output truncation/spill, and a credential scrub. Reusing it for hook execution means the bridges do not re-implement subprocess plumbing — but the seam had no way to write stdin or set extra env. + +The friction is that those two inputs are **dangerous in exactly the way the seam was built to prevent**. [dsh-bash-local](../../../../packages/bash/bash-local)'s `childEnv()` deliberately scrubs `*KEY*`/`*SECRET*`/`*TOKEN*` from the child environment so the harness's own `DEEPSEEK_API_KEY` cannot leak into model-driven command output (see [AGENTS.md](../../../../AGENTS.md) § Defensive patterns, "Never hand untrusted/model output the ambient environment or predictable paths"). An arbitrary-env / arbitrary-stdin capability is the opposite of that guarantee. So the question this RFC answers is not "can we add stdin/env" — it is "who is allowed to use them, and how is that boundary enforced". + +## Decision + +Add `stdin?: string` and `env?: Record` to **both** `BashExecRequest` (the model-/plugin-facing request) and `BashExecSpec` (the resolved spec `run`/`start` act on), and thread them through `dsh-bash-local`: `resolve()` carries them verbatim, `run()`/`start()` pass them to `runBash`, which writes the bytes to the child's stdin and merges the extra env. + +Three deliberate choices: + +1. **`stdin`/`env` are a TRUSTED-PLUGIN surface, enforced at the consumer, not the seam.** The seam itself imposes no access policy (consistent with how `owner` works — the executor stores but never interprets it). The enforcement lives in the model-facing consumer [dsh-tool-bash](../../../../packages/bash/tool-bash): its `bash` tool builds its `BashExecRequest` from `command`/`workdir`/`timeoutMs`/`signal`/`owner` **only**, and never reads model arguments into `stdin`/`env`. A model that smuggles `env`/`stdin` keys into the tool-call arguments gets them ignored. A regression guard (`tool-bash` "trusted-plugin boundary" tests) drives the real tool with adversarial args and asserts the recorded request carries neither field — and is proven to go red if the consumer ever forwards them. Only in-process plugins (the hooks bridges, native plugins) that construct a `BashExecRequest` directly can set them. + +2. **`env` merges AFTER the credential scrub, so a trusted caller's explicit entry always wins** — even a credential-shaped name. This is correct precisely because the scrub's job is narrow: stop the harness's *ambient* `process.env` credentials from leaking into *model-driven* commands. A trusted plugin that explicitly sets a var has taken responsibility for it; the scrub is not a constraint on trusted callers. `childEnv(extra?)` layers `scrub(process.env)` → `ENV_OVERRIDES` (the model-friendly `TERM=dumb` etc.) → `extra`, last-wins. + +3. **`stdin`/`env` are required-absent-OK (plain optional) on the resolved spec, NOT required-but-nullable like `owner`.** `owner` is required-but-nullable because a *silently* missing owner yields an unowned, cross-session-readable task — a security footgun that a visible `undefined` guards against. `stdin`/`env` have no such hazard: a missing one means "no stdin / no extra env", which is the safe, ordinary case (every model-driven call). So they stay plain optionals, matching `signal`. + +`dsh-bash-local` now ALWAYS spawns stdin as a `'pipe'` and closes it immediately — with the supplied bytes when a trusted plugin set `stdin`, empty otherwise. A closed empty pipe gives a reading child EOF exactly as the previous `'ignore'` (`/dev/null`) did, so the no-stdin path is behavior-equivalent; keeping the `stdio` tuple a literal `['pipe','pipe','pipe']` also preserves the typed `spawn` overload that guarantees non-null `stdout`/`stderr`. A child that exits without reading makes the stdin write fail EPIPE; that error is swallowed (the command's outcome rides on its exit code/output, not the write) so it never crashes the host or rejects `done`. + +## Scope: configurable scrub pattern is NOT included + +An earlier sketch of this work also proposed making `SENSITIVE_ENV_PATTERN` configurable. Validating against the code, that is **speculative and already subsumed**: `run.ts` documents a configurable whitelist as future work, and the new explicit `env` field — merged after the scrub — already gives a trusted plugin full control, including over credential-shaped vars. There is no current caller that needs to *broaden* the ambient scrub (the hazard runs the other way). Adding a config knob now would be a feature with no consumer, against [AGENTS.md](../../../../AGENTS.md) § "Don't add features beyond what the task requires". If a real workflow ever needs to forward a specific ambient credential, the explicit `env` field is the supported path; a configurable scrub can be reconsidered then. + +## Consequences + +The hooks bridges (PR-F) build a `BashExecRequest` with the hook's JSON payload as `stdin` and its `CLAUDE_*`/`PLUGIN_ROOT` vars as `env`, and run it through the same `ctx.bash` everything else uses — no bespoke subprocess code, and the full process-group-kill / truncation / spill machinery for free. The model-facing attack surface is unchanged: the consumer's request-building is the single boundary, guarded by a test that fails if it regresses. The vocabulary addition is documented in [docs/core-data-structures/bash.md](../../../core-data-structures/bash.md) (the `type-equiv` request/spec blocks) and the three bash-package READMEs; the trusted-plugin rule mirrors the existing scrub/predictable-path discipline in [AGENTS.md](../../../../AGENTS.md) § Defensive patterns. diff --git a/packages/bash/bash-local/README.md b/packages/bash/bash-local/README.md index 016f57d2a9..2ae905b628 100644 --- a/packages/bash/bash-local/README.md +++ b/packages/bash/bash-local/README.md @@ -21,7 +21,7 @@ Design surveyed against the bash tools of Claude Code, OpenCode, Codex, and pi; - **Spawn per call, no shell state** — every call is a fresh non-login `bash -c` (deterministic; no rc files). All four surveyed tools spawn per call. `XXX(stateful-shell)` in `src/run.ts` records the two proven stateful designs (Claude Code's cwd-only persistence; Codex's PTY exec sessions) for when real workflows demand them. - **Process-group kills with escalation** — children are spawned `detached` (own process group); kills send SIGTERM to the group, then SIGKILL after a 3s grace (OpenCode's escalation; pipelines and subshells die with the parent). ESRCH is tolerated; daemons that re-parent away from the group can still survive — same caveat as the surveyed tools. - **Tail-keep truncation + spill files** — output beyond `maxOutputBytes` keeps the in-memory TAIL (errors/results cluster at the end — pi/OpenCode rationale) while the FULL stream is appended to a temp file whose path is reported when available. If the final spill close reports a delayed writeback failure, the executor still returns the tail but withholds the path rather than advertising a possibly incomplete file. -- **Model-friendly env** — `NO_COLOR=1 TERM=dumb PAGER=cat GIT_PAGER=cat` (Codex's hardcoded set) so pagers and ANSI color don't garble results. +- **Model-friendly env + credential scrub** — `process.env` minus credential-shaped vars (`*KEY*`/`*SECRET*`/`*TOKEN*`), then `NO_COLOR=1 TERM=dumb PAGER=cat GIT_PAGER=cat` (Codex's hardcoded set) so pagers and ANSI color don't garble results. A spec's **trusted-plugin** `env` is merged LAST (after the scrub), so an in-process plugin's explicit entry wins even on a credential-shaped name — the scrub guards the harness's *ambient* credentials from *model-driven* commands, not a trusted caller. The spec's `stdin` (also trusted-plugin) is written to the child and closed; with none supplied, stdin is an immediately-closed empty pipe (EOF, as before). See [the trusted-plugin RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). - **Background tasks** — `start()` returns immediately, no timeout applies (Claude Code detaches timeouts when backgrounding), `readOutput()` is incremental with whole-stream byte offsets, and disposal kills everything. The spec's opaque `owner` token is stored on the tracked task and returned by `ownerOf(id)` — the executor never interprets it (the consumer's access policy does), and because it lives with the task here it survives a `tool-bash` HMR reload. ## Sandboxing diff --git a/packages/bash/bash-local/src/index.ts b/packages/bash/bash-local/src/index.ts index 05f1ed75dd..53c369a24c 100644 --- a/packages/bash/bash-local/src/index.ts +++ b/packages/bash/bash-local/src/index.ts @@ -116,6 +116,10 @@ export class LocalBashExecutor extends BashExecutor { workdir: request.workdir ?? this.config.cwd ?? process.cwd(), timeoutMs, ...request.signal ? { signal: request.signal } : {}, + // Carry the trusted-plugin stdin/env through verbatim — optional, no + // config default (absent means none). env merges AFTER the scrub in run.ts. + ...request.stdin !== undefined ? { stdin: request.stdin } : {}, + ...request.env !== undefined ? { env: request.env } : {}, // Carry the owner through verbatim (required-but-nullable on the spec): // the executor never interprets it — the consumer's access policy does. owner: request.owner, @@ -129,6 +133,8 @@ export class LocalBashExecutor extends BashExecutor { timeoutMs: spec.timeoutMs, maxOutputBytes: this.config.maxOutputBytes, signal: spec.signal, + stdin: spec.stdin, + env: spec.env, }, this.internals).done return { ...outcome, timeoutMs: spec.timeoutMs } } @@ -145,6 +151,8 @@ export class LocalBashExecutor extends BashExecutor { timeoutMs: 0, maxOutputBytes: this.config.maxOutputBytes, signal: spec.signal, + stdin: spec.stdin, + env: spec.env, }, this.internals) const id = BashTaskId(`bash-${this.nextTaskId++}`) diff --git a/packages/bash/bash-local/src/run.ts b/packages/bash/bash-local/src/run.ts index 8a8d2065d2..faba210656 100644 --- a/packages/bash/bash-local/src/run.ts +++ b/packages/bash/bash-local/src/run.ts @@ -42,13 +42,24 @@ export const ENV_OVERRIDES = { */ export const SENSITIVE_ENV_PATTERN = /KEY|SECRET|TOKEN/i -/** process.env minus credential-shaped vars, plus the model-friendly overrides. */ -export function childEnv(): NodeJS.ProcessEnv { +/** + * `process.env` minus credential-shaped vars, plus the model-friendly + * overrides, plus any caller-supplied `extra` entries. + * + * Layering matters: the scrub drops `process.env` credentials, then + * `ENV_OVERRIDES` forces the model-friendly terminal vars, then `extra` is + * merged LAST so a TRUSTED-PLUGIN entry wins even when its name matches the + * scrub pattern (the scrub guards against leaking the HARNESS's ambient + * credentials into model-driven commands; an in-process plugin that explicitly + * sets a var has taken responsibility for it). `extra` is NEVER model-supplied + * — `dsh-tool-bash` does not forward model input here (see its module doc). + */ +export function childEnv(extra?: Record): NodeJS.ProcessEnv { const env: NodeJS.ProcessEnv = {} for (const [key, value] of Object.entries(process.env)) { if (!SENSITIVE_ENV_PATTERN.test(key)) env[key] = value } - return { ...env, ...ENV_OVERRIDES } + return { ...env, ...ENV_OVERRIDES, ...extra } } /** What to run and under which limits (resolved — no defaults in here). */ @@ -61,6 +72,18 @@ export interface SpawnSpec { maxOutputBytes: number /** Abort signal — kills the process group when fired. */ signal?: AbortSignal | undefined + /** + * Bytes to write to the child's stdin, then close it. Absent (or empty) + * leaves stdin closed/empty. A TRUSTED-PLUGIN surface (see {@link SpawnSpec}'s + * consumer `dsh-bash`); never carries model input. + */ + stdin?: string | undefined + /** + * Extra environment entries, merged onto the scrubbed env AFTER the + * credential scrub and the model-friendly overrides (so an explicit entry + * wins). A TRUSTED-PLUGIN surface; never carries model input. + */ + env?: Record | undefined } /** Raw outcome of one closed process (before result shaping). */ @@ -272,13 +295,24 @@ export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningB throw new Error(`aborted before spawn: ${String(spec.signal.reason ?? 'aborted')}`) } + // stdin is ALWAYS a pipe (kept literal so the typed spawn overload guarantees + // non-null stdout/stderr) and is closed immediately: with bytes when a + // trusted plugin supplied stdin, empty otherwise. A closed empty pipe gives a + // reading child EOF exactly as `/dev/null` would, so the no-stdin path (every + // model-driven call) is unchanged. const child = spawn('bash', ['-c', spec.command], { cwd: spec.cwd, - env: childEnv(), - stdio: ['ignore', 'pipe', 'pipe'], + env: childEnv(spec.env), + stdio: ['pipe', 'pipe', 'pipe'], detached: true, }) + // A child that exits without reading stdin makes the write error EPIPE — + // swallow it (the command's outcome rides on its exit code/output, not the + // stdin write) so it never crashes the host or rejects `done`. + child.stdin.on('error', () => { /* EPIPE: child closed stdin early; outcome rides on exit. */ }) + child.stdin.end(spec.stdin ?? '') + const stdout = new OutputCollector(spec.maxOutputBytes, 'stdout', spillDir) const stderr = new OutputCollector(spec.maxOutputBytes, 'stderr', spillDir) child.stdout.on('data', (chunk: Buffer) => { stdout.push(chunk) }) diff --git a/packages/bash/bash-local/tests/executor.spec.ts b/packages/bash/bash-local/tests/executor.spec.ts index 2a27f29731..03f602a2f1 100644 --- a/packages/bash/bash-local/tests/executor.spec.ts +++ b/packages/bash/bash-local/tests/executor.spec.ts @@ -106,6 +106,23 @@ describe('LocalBashExecutor.run', () => { const { bash } = await setup() await expect(bash.run(bash.resolve({ command: 'true', workdir: '/nonexistent-dsh' }))).rejects.toThrow(/ENOENT/) }) + + it('resolve() carries stdin/env onto the spec, and run() threads them to the command', async () => { + const { bash } = await setup() + const spec = bash.resolve({ command: 'cat; echo "[$DSH_SEAM_VAR]"', stdin: 'piped\n', env: { DSH_SEAM_VAR: 'env-ok' } }) + // resolve() keeps the trusted-plugin fields verbatim (optional, no default). + expect(spec.stdin).toBe('piped\n') + expect(spec.env).toEqual({ DSH_SEAM_VAR: 'env-ok' }) + const result = await bash.run(spec) + expect(result.stdout.text).toBe('piped\n[env-ok]\n') + }) + + it('resolve() omits stdin/env when the request supplies neither', async () => { + const { bash } = await setup() + const spec = bash.resolve({ command: 'true' }) + expect('stdin' in spec).toBe(false) + expect('env' in spec).toBe(false) + }) }) describe('LocalBashExecutor background tasks', () => { @@ -131,6 +148,19 @@ describe('LocalBashExecutor background tasks', () => { await Promise.all([first.done, second.done]) }) + it('threads stdin and extra env into a background task', async () => { + const { bash } = await setup() + const task = bash.start(bash.resolve({ + command: 'cat; echo "[$DSH_BG_VAR]"', + stdin: 'bg-stdin\n', + env: { DSH_BG_VAR: 'bg-env' }, + })) + const read = await readUntil(bash, task.id, '[bg-env]') + expect(read.delta).toContain('bg-stdin') + await task.done + expect(task.exitCode).toBe(0) + }) + it('readOutput returns increments without re-delivery', async () => { const { bash } = await setup() const task = bash.start(bash.resolve({ command: 'echo first; sleep 1; echo second' })) diff --git a/packages/bash/bash-local/tests/run.spec.ts b/packages/bash/bash-local/tests/run.spec.ts index b770c4a6c1..3859f2ac39 100644 --- a/packages/bash/bash-local/tests/run.spec.ts +++ b/packages/bash/bash-local/tests/run.spec.ts @@ -158,6 +158,49 @@ describe('runBash', () => { }) }) +describe('stdin and extra env (trusted-plugin surface)', () => { + it('writes stdin to the command and closes it', async () => { + const result = await runBash(spec('cat', { stdin: 'hello from stdin\n' })).done + expect(result.exitCode).toBe(0) + expect(result.stdout.text).toBe('hello from stdin\n') + }) + + it('a command that reads stdin sees EOF when none is supplied', async () => { + // No stdin → the always-piped-but-empty stdin closes immediately, so `cat` + // reads EOF and exits 0 with no output (it does NOT block). + const result = await runBash(spec('cat')).done + expect(result.exitCode).toBe(0) + expect(result.stdout.text).toBe('') + }) + + it('merges extra env entries onto the scrubbed environment', async () => { + const result = await runBash(spec('echo "$DSH_EXTRA_ONE/$DSH_EXTRA_TWO"', { + env: { DSH_EXTRA_ONE: 'alpha', DSH_EXTRA_TWO: 'beta' }, + })).done + expect(result.stdout.text).toBe('alpha/beta\n') + }) + + it('an explicit extra env entry overrides the model-friendly override and the scrub', async () => { + // TERM is a model-friendly OVERRIDE (dumb); an explicit extra entry wins. + // DSH_OVERRIDE_KEY matches the credential scrub pattern, yet an explicit + // entry is still honored — the scrub only drops AMBIENT process.env creds. + const result = await runBash(spec('echo "$TERM/$DSH_OVERRIDE_KEY"', { + env: { TERM: 'xterm-256color', DSH_OVERRIDE_KEY: 'explicit-wins' }, + })).done + expect(result.stdout.text).toBe('xterm-256color/explicit-wins\n') + }) + + it('does not crash or reject when the child ignores a large stdin (EPIPE)', async () => { + // The child exits immediately without reading; closing our end of a stdin + // pipe still holding ~1MiB triggers EPIPE on the write. The handler must + // swallow it: `done` resolves normally with the child's real exit. + const big = 'x'.repeat(1024 * 1024) + const result = await runBash(spec('exit 7', { stdin: big })).done + expect(result.exitCode).toBe(7) + expect(result.aborted).toBe(false) + }) +}) + describe('output truncation and spill', () => { it('keeps the tail and spills the full stream to disk', async () => { // 200 numbered lines of ~10 bytes; cap at 500 bytes keeps a late tail. diff --git a/packages/bash/bash/README.md b/packages/bash/bash/README.md index 6123565e7a..cec9e5834a 100644 --- a/packages/bash/bash/README.md +++ b/packages/bash/bash/README.md @@ -28,4 +28,6 @@ Implementations subclass `BashExecutor`, implement the abstract methods, and cal ## Vocabulary -`BashExecRequest` (command, workdir?, timeoutMs?, signal?, owner?) resolves to `BashExecSpec` (command, workdir, timeoutMs, signal?, owner) before execution; `owner` is optional on the request and **required-but-nullable** (`OwnerToken | undefined`) on the resolved spec, so a forgotten owner is a visible `undefined` rather than a silently-absent property. The task id (`BashTaskId`) and the `owner` token (`OwnerToken`) are [branded](../../util/brand) — `OwnerToken` is a DISTINCT brand from `SessionId` (the seam never imports `dsh-session`; the `dsh-tool-bash` consumer is the single boundary that casts its `SessionId` into one). `run()` returns `BashRunResult` (exitCode, signal, timedOut, aborted, timeoutMs, stdout/stderr as `CollectedOutput`) and `start()`/`readOutput()` use `BashTask`/`BashTaskRead` for the background side. See `src/types.ts` for the full contracts. +`BashExecRequest` (command, workdir?, timeoutMs?, signal?, stdin?, env?, owner?) resolves to `BashExecSpec` (command, workdir, timeoutMs, signal?, stdin?, env?, owner) before execution; `owner` is optional on the request and **required-but-nullable** (`OwnerToken | undefined`) on the resolved spec, so a forgotten owner is a visible `undefined` rather than a silently-absent property. The task id (`BashTaskId`) and the `owner` token (`OwnerToken`) are [branded](../../util/brand) — `OwnerToken` is a DISTINCT brand from `SessionId` (the seam never imports `dsh-session`; the `dsh-tool-bash` consumer is the single boundary that casts its `SessionId` into one). `run()` returns `BashRunResult` (exitCode, signal, timedOut, aborted, timeoutMs, stdout/stderr as `CollectedOutput`) and `start()`/`readOutput()` use `BashTask`/`BashTaskRead` for the background side. See `src/types.ts` for the full contracts. + +`stdin` and `env` are a **trusted-plugin surface**: an in-process plugin (the hooks bridges, native plugins) sets them to feed a hook command its JSON payload on stdin and its `CLAUDE_PROJECT_DIR`/`CLAUDE_PLUGIN_ROOT` env. The model-facing `dsh-tool-bash` tool deliberately never forwards model input into either — so a model cannot smuggle an env var or stdin payload past the implementation's credential scrub. They are plain optionals on the resolved spec (unlike `owner`'s required-but-nullable): a missing one means "none", the safe default, not a security footgun. See [the trusted-plugin RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). diff --git a/packages/bash/bash/src/types.ts b/packages/bash/bash/src/types.ts index d9ab9f9b4d..f5be9f11fe 100644 --- a/packages/bash/bash/src/types.ts +++ b/packages/bash/bash/src/types.ts @@ -45,6 +45,23 @@ export interface BashExecRequest { timeoutMs?: number | undefined /** Abort signal — implementations kill the command when it fires. */ signal?: AbortSignal | undefined + /** + * Bytes to write to the command's stdin, then close it. Absent leaves stdin + * closed/empty (the default for model-driven tool calls). A TRUSTED-PLUGIN + * surface: the model-facing bash tool does NOT thread model-supplied input + * here — it is set by in-process plugins (e.g. the hooks bridges, which write + * a hook command's JSON payload to its stdin). + */ + stdin?: string | undefined + /** + * Extra environment entries for the command, merged AFTER the + * implementation's credential scrub (so an explicit entry here is honored even + * when its name matches the scrub pattern — the caller takes responsibility). + * Like {@link stdin}, a TRUSTED-PLUGIN surface: the model-facing bash tool + * never forwards model-supplied env; in-process plugins (the hooks bridges) + * set hook env vars (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, …) here. + */ + env?: Record | undefined /** * Opaque OWNER token for a background task — the consumer's isolation key * (the tool layer passes the owning agent's `session.header.id`). The @@ -70,6 +87,23 @@ export interface BashExecSpec { timeoutMs: number /** Abort signal — implementations kill the command when it fires. */ signal?: AbortSignal | undefined + /** + * Bytes to write to the command's stdin (then close it), carried through + * verbatim from {@link BashExecRequest.stdin}. OPTIONAL on the resolved spec + * (unlike `owner`): it has no config default, so a missing one means "no + * stdin" — the safe, ordinary case — not a silent footgun, so it stays a + * plain optional rather than required-but-nullable. A TRUSTED-PLUGIN surface + * (see the request field). + */ + stdin?: string | undefined + /** + * Extra environment entries, carried through verbatim from + * {@link BashExecRequest.env} and merged by the implementation AFTER its + * credential scrub (an explicit entry wins even when its name matches the + * scrub pattern). OPTIONAL on the spec for the same reason as `stdin` — no + * config default, absent means "no extra env". A TRUSTED-PLUGIN surface. + */ + env?: Record | undefined /** * Opaque owner token, REQUIRED-but-nullable (mirrors `workdir`/`timeoutMs` * being required on the resolved spec): {@link BashExecutor.resolve} carries diff --git a/packages/bash/tool-bash/README.md b/packages/bash/tool-bash/README.md index 656a22cdb1..f7a15894f9 100644 --- a/packages/bash/tool-bash/README.md +++ b/packages/bash/tool-bash/README.md @@ -40,6 +40,10 @@ These tools own how their calls render in a UI (an editor's tool-call card) via When a background task finishes, a short notice is injected into the owning agent's session (`agent.inject()`, source `{kind: 'plugin', plugin: 'tool-bash'}`). The owning agent is found by its session token: the listener reads `ctx.bash.ownerOf(task.id)` and scans `ctx.get('agents')?.list()` for an agent whose `session.header.id` matches (read via `ctx.get` — `onTaskDone` runs on the bash fiber, a foreign fiber, so the `ctx.agents` proxy would throw). If no live agent carries that token — e.g. the owning session disconnected and its agent was disposed while the task ran on — the notice is dropped cleanly. Injection is **durable context for the next model request, not a wake-up** — an idle agent stays idle until something sends a message. That's why the tool descriptions tell the model to poll with `bash_output`. +## Trusted-plugin boundary: env / stdin are never model-driven + +The `BashExecRequest` seam carries optional `stdin` and `env` (a **trusted-plugin surface** used by the hooks bridges to feed a hook command its JSON payload and `CLAUDE_*` env). This tool deliberately **never** threads model input into either: its request is built from `command`/`workdir`/`timeoutMs`/`signal`/`owner` only, so a model that includes `env` or `stdin` keys in its tool arguments has them ignored — it cannot smuggle an environment variable or stdin payload past `dsh-bash-local`'s credential scrub. A regression guard (the "trusted-plugin boundary" tests) drives the real tool with adversarial args and asserts the resulting request carries neither field. See [the trusted-plugin RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). + ## Permissions `TODO(permissions)`: commands run with the executor's full authority. The permission/sandbox seam is the `tools/execute` waterfall (veto or ask) plus sandboxing `BashExecutor` implementations — see docs/architecture.md. `@cordisjs/plugin-capability` (a named-permission service with a session `test()`) is a candidate building block for that work. diff --git a/packages/bash/tool-bash/tests/tools.spec.ts b/packages/bash/tool-bash/tests/tools.spec.ts index 9de079fd33..0845163193 100644 --- a/packages/bash/tool-bash/tests/tools.spec.ts +++ b/packages/bash/tool-bash/tests/tools.spec.ts @@ -863,3 +863,99 @@ describe('tool-owned UI presentation (presentCall / presentResult)', () => { expect(ctx.tools.get('bash')?.presentCall?.({ command: 'ls' })).toBeUndefined() }) }) + +describe('trusted-plugin boundary: the model-facing bash tool never sets env/stdin', () => { + /** + * Records every {@link BashExecRequest} the consumer hands to `resolve()`, so a + * test can assert what the model-facing tool DID and DID NOT forward. `stdin` + * and `env` are a TRUSTED-PLUGIN surface (in-process plugins only); the `bash` + * tool must never thread model-supplied input into them, even when the model + * smuggles extra keys into the tool arguments. Foreground `run()` returns a + * canned result; `start()` is unused here. + */ + class RecordingBashExecutor extends BashExecutor { + readonly requests: BashExecRequest[] = [] + resolve(request: BashExecRequest): BashExecSpec { + this.requests.push(request) + return { + command: request.command, + workdir: request.workdir ?? process.cwd(), + timeoutMs: request.timeoutMs ?? 0, + ...request.signal ? { signal: request.signal } : {}, + ...request.stdin !== undefined ? { stdin: request.stdin } : {}, + ...request.env !== undefined ? { env: request.env } : {}, + owner: request.owner, + } + } + run(): Promise { + return Promise.resolve({ + exitCode: 0, signal: null, timedOut: false, aborted: false, timeoutMs: 0, + stdout: { text: 'ok', truncated: false }, stderr: { text: '', truncated: false }, + }) + } + start(): BashTask { throw new Error('unused') } + get(): BashTask | undefined { return undefined } + ownerOf(): OwnerToken | undefined { return undefined } + list(): BashTask[] { return [] } + readOutput(): BashTaskRead { throw new Error('unused') } + kill(): boolean { return false } + } + + async function setupRecording() { + const ctx = new Context() + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(RecordingBashExecutor) + await ctx.plugin(ToolBash) + return { ctx, bash: ctx.bash as RecordingBashExecutor } + } + + it('does not forward env/stdin even when the model smuggles them as extra arguments', async () => { + const { ctx, bash } = await setupRecording() + // Adversarial args: the model includes `env` and `stdin` keys (and a + // credential-shaped value) hoping they reach the executor. The bash tool's + // schema ignores unknown keys, and execute() builds the request from only + // command/workdir/timeoutMs/signal — so the recorded request carries NEITHER. + await ctx.tools.execute({ + callId: CallId('boundary-1'), + name: 'bash', + arguments: { + command: 'echo hi', + description: 'echo', + env: { SNEAKY_API_KEY: 'leak' }, + stdin: 'malicious payload', + }, + }) + expect(bash.requests).toHaveLength(1) + const request = bash.requests[0]! + expect(request.command).toBe('echo hi') + expect('env' in request).toBe(false) + expect('stdin' in request).toBe(false) + }) + + it('a background bash call likewise carries no env/stdin', async () => { + const { ctx, bash } = await setupRecording() + // start() throws in this recorder, but resolve() runs first and records the + // request — which is all this boundary assertion needs. + await ctx.tools.execute({ + callId: CallId('boundary-2'), + name: 'bash', + arguments: { + command: 'sleep 1', + description: 'sleep', + run_in_background: true, + env: { TOKEN: 'leak' }, + stdin: 'x', + }, + }) + expect(bash.requests).toHaveLength(1) + const request = bash.requests[0]! + expect('env' in request).toBe(false) + expect('stdin' in request).toBe(false) + // The owner token IS set on a background call (the isolation fence) — proving + // the recorder sees the real request the consumer built, so the absent + // env/stdin above is a real negative, not a recorder that drops everything. + expect('owner' in request).toBe(true) + }) +}) From b44066d54425c96a0dc110e0297787768817c878 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 14:17:19 +0800 Subject: [PATCH 06/47] =?UTF-8?q?docs(bash):=20address=20Codex=20review=20?= =?UTF-8?q?=E2=80=94=20RFC=20states=20current=20truth,=20fix=20doc=20refer?= =?UTF-8?q?ence?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - The implemented RFC named stack positions (PR-A…PR-F, "the hooks bridges (PR-F)") as shipped reality, violating the rule that an implemented RFC describes current truth and docs never name a change unit the reader cannot see. Rephrased to describe the hooks subsystem / a hook bridge as the standing motivating consumer, without PR/stack references. The decision and rationale are unchanged. - childEnv's comment pointed at dsh-tool-bash's "module doc" for the trusted-plugin boundary, but that explanation lives in the package README (§ "Trusted-plugin boundary"), not the module JSDoc. Fixed the reference. --- .../2026-06-30-bash-stdin-env-trusted-plugin-surface.md | 4 ++-- packages/bash/bash-local/src/run.ts | 3 ++- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md b/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md index ce1c8df0be..224ff6c24a 100644 --- a/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md +++ b/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md @@ -6,7 +6,7 @@ Status: implemented (accepted 2026-06-30) ## Context -The hooks subsystem (stack PR-A…PR-F) runs external hook commands the way Claude Code and Codex do: a hook is a shell command that receives its event payload as **JSON on stdin** and reads context from a handful of **environment variables** (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, `PLUGIN_ROOT`, …). The harness already has a perfectly good command runner behind the `ctx.bash` capability seam ([dsh-bash](../../../../packages/bash/bash) → [dsh-bash-local](../../../../packages/bash/bash-local)), with process-group kills, output truncation/spill, and a credential scrub. Reusing it for hook execution means the bridges do not re-implement subprocess plumbing — but the seam had no way to write stdin or set extra env. +The hooks subsystem runs external hook commands the way Claude Code and Codex do: a hook is a shell command that receives its event payload as **JSON on stdin** and reads context from a handful of **environment variables** (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, `PLUGIN_ROOT`, …). The harness already has a perfectly good command runner behind the `ctx.bash` capability seam ([dsh-bash](../../../../packages/bash/bash) → [dsh-bash-local](../../../../packages/bash/bash-local)), with process-group kills, output truncation/spill, and a credential scrub. Reusing it for hook execution means a hook bridge does not re-implement subprocess plumbing — but the seam had no way to write stdin or set extra env. The friction is that those two inputs are **dangerous in exactly the way the seam was built to prevent**. [dsh-bash-local](../../../../packages/bash/bash-local)'s `childEnv()` deliberately scrubs `*KEY*`/`*SECRET*`/`*TOKEN*` from the child environment so the harness's own `DEEPSEEK_API_KEY` cannot leak into model-driven command output (see [AGENTS.md](../../../../AGENTS.md) § Defensive patterns, "Never hand untrusted/model output the ambient environment or predictable paths"). An arbitrary-env / arbitrary-stdin capability is the opposite of that guarantee. So the question this RFC answers is not "can we add stdin/env" — it is "who is allowed to use them, and how is that boundary enforced". @@ -30,4 +30,4 @@ An earlier sketch of this work also proposed making `SENSITIVE_ENV_PATTERN` conf ## Consequences -The hooks bridges (PR-F) build a `BashExecRequest` with the hook's JSON payload as `stdin` and its `CLAUDE_*`/`PLUGIN_ROOT` vars as `env`, and run it through the same `ctx.bash` everything else uses — no bespoke subprocess code, and the full process-group-kill / truncation / spill machinery for free. The model-facing attack surface is unchanged: the consumer's request-building is the single boundary, guarded by a test that fails if it regresses. The vocabulary addition is documented in [docs/core-data-structures/bash.md](../../../core-data-structures/bash.md) (the `type-equiv` request/spec blocks) and the three bash-package READMEs; the trusted-plugin rule mirrors the existing scrub/predictable-path discipline in [AGENTS.md](../../../../AGENTS.md) § Defensive patterns. +A hook bridge builds a `BashExecRequest` with the hook's JSON payload as `stdin` and its `CLAUDE_*`/`PLUGIN_ROOT` vars as `env`, and runs it through the same `ctx.bash` everything else uses — no bespoke subprocess code, and the full process-group-kill / truncation / spill machinery for free. The model-facing attack surface is unchanged: the consumer's request-building is the single boundary, guarded by a test that fails if it regresses. The vocabulary addition is documented in [docs/core-data-structures/bash.md](../../../core-data-structures/bash.md) (the `type-equiv` request/spec blocks) and the three bash-package READMEs; the trusted-plugin rule mirrors the existing scrub/predictable-path discipline in [AGENTS.md](../../../../AGENTS.md) § Defensive patterns. diff --git a/packages/bash/bash-local/src/run.ts b/packages/bash/bash-local/src/run.ts index faba210656..4b043e3fe3 100644 --- a/packages/bash/bash-local/src/run.ts +++ b/packages/bash/bash-local/src/run.ts @@ -52,7 +52,8 @@ export const SENSITIVE_ENV_PATTERN = /KEY|SECRET|TOKEN/i * scrub pattern (the scrub guards against leaking the HARNESS's ambient * credentials into model-driven commands; an in-process plugin that explicitly * sets a var has taken responsibility for it). `extra` is NEVER model-supplied - * — `dsh-tool-bash` does not forward model input here (see its module doc). + * — `dsh-tool-bash` does not forward model input here (see its README, § + * "Trusted-plugin boundary"). */ export function childEnv(extra?: Record): NodeJS.ProcessEnv { const env: NodeJS.ProcessEnv = {} From dc95a7881d8c45084069d5c856c15aefe1a6d197 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 17:11:18 +0800 Subject: [PATCH 07/47] =?UTF-8?q?feat(events):=20interception=20seams=20?= =?UTF-8?q?=E2=80=94=20the=20typed-Decision=20surface=20for=20hooks?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Reshape the agent's interception surface so every seam returns a small, typed Decision union, and the set covers the hook points a CC/Codex bridge (and a native plugin) needs. "Native hooks" are not a package — a native hook is just a cordis plugin on these canonical events; the bridges (a later PR) only translate an external protocol onto the same surface. dsh-agent: - NEW agent/session-start(agent, source) emit (once before turn 1; SessionStartSource startup|resume|clear|compact) — a pure notification, seeds context via inject(). - NEW agent/prompt-submit waterfall → PromptDecision (allow, optionally rewriting the prompt or attaching additionalContext, or block). - RESHAPE agent/turn-continuation boolean → ContinuationDecision ({action:'stop'} | {action:'continue', reason?}; a continue reason is recorded as next-step steering). - New HookContext envelope (required source — inject() would mislabel a missing one). dsh-tools: split the single tools/execute waterfall into tools/pre-execute (PreToolDecision allow/deny/ask gate) and tools/post-execute (PostToolDecision accept/block, optionally replacing content or attaching additionalContext). Core dispatch sits between as plain code; the tool body keeps its inner try/catch so a thrown tool still reaches post-execute as an isError. ToolExecutionResult gains additionalContext (ferried to the loop's per-step buffer). Input rewrite is deliberately NOT offered (a proposed RFC designs it consistently). dsh-session: new `rejected` TurnEndReason — a turn whose whole prompt batch was blocked by prompt-submit. agent-loop firing points: session-start emitted at create (source threaded — startup for create/fork, resume for resume()); prompt-submit per drained message with the always-open-turn rule (a fully-blocked batch is a zero-step rejected turn); the continuation reshape; post-tool additionalContext buffered and appended after all tool/results (adjacency). ACP codec maps rejected→cancelled. A worked native-plugin example (interception.spec.ts) proves all four seams compose end-to-end through the real loop with NO hook/* events (those belong to the bridge lib). All existing tools/execute + turn-continuation tests migrated. The tool-subagent abort test now aborts after a microtask so it still exercises the live onAbort bridge (execute() awaits pre-execute before the body runs). RFCs: implemented/feature/2026-06-30-interception-seams.md (the reshape) + proposed/feature/2026-06-30-pre-tool-input-rewrite.md (the deferred rewrite design). --- docs/architecture.md | 35 +- docs/cookbook/extension-cookbook.md | 12 +- docs/cordis-catalog/events-and-services.md | 76 ++- docs/core-data-structures/core.md | 37 +- docs/core-data-structures/session.md | 12 +- docs/core-data-structures/tools.md | 30 +- docs/rfc/README.md | 2 + .../feature/2026-06-30-interception-seams.md | 45 ++ .../2026-06-30-pre-tool-input-rewrite.md | 39 ++ .../bash/tool-bash/tests/integration.spec.ts | 7 +- packages/core/agent-loop/README.md | 20 +- packages/core/agent-loop/src/index.ts | 35 +- packages/core/agent-loop/src/loop.ts | 84 +++- packages/core/agent-loop/tests/cancel.spec.ts | 2 +- .../agent-loop/tests/interception.spec.ts | 446 ++++++++++++++++++ packages/core/agent-loop/tests/loop.spec.ts | 6 +- packages/core/agent-loop/tests/resume.spec.ts | 30 ++ .../agent-loop/tests/review-fixes.spec.ts | 19 +- packages/core/agent/README.md | 8 +- packages/core/agent/src/types.ts | 97 +++- packages/core/session/src/types.ts | 10 + packages/core/tools/README.md | 13 +- packages/core/tools/src/index.ts | 175 ++++++- packages/core/tools/tests/tools.spec.ts | 140 ++++-- .../tool-subagent/tests/tool-subagent.spec.ts | 8 + packages/ui/acp/src/codec.ts | 6 + packages/ui/acp/tests/codec.spec.ts | 1 + scripts/type-equiv.manifest.json | 6 + 28 files changed, 1255 insertions(+), 146 deletions(-) create mode 100644 docs/rfc/implemented/feature/2026-06-30-interception-seams.md create mode 100644 docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md create mode 100644 packages/core/agent-loop/tests/interception.spec.ts diff --git a/docs/architecture.md b/docs/architecture.md index 67d6a06a20..c5d3a9123a 100644 --- a/docs/architecture.md +++ b/docs/architecture.md @@ -69,7 +69,7 @@ Swappable capabilities are split into **three packages** so each part evolves in The LLM seam has the same topology folded differently: `dsh-llm` carries the interface (`LlmAdapter`) AND the consumer surface (`ctx.llm.stream()`), with adapters as implementation packages — there the consumer is the loop itself, not a swappable schema surface. Use the full three-package split when the consumer is independently replaceable; keep interface + consumer together when they are one concern. Don't split preemptively: a capability with one conceivable implementation and one consumer stays one package until proven otherwise. -> **"Capability" — two unrelated meanings.** (1) The *seam pattern* above ("one plugin provides a capability, another needs it") is realized by plain Cordis **services + `inject`**: a provider registers a service (`ctx.bash`, declared in `interface Context`); a consumer declares `inject: ['bash']` and its fiber stays pending until the service exists, tearing down via HMR if it later vanishes. No extra library is needed. (2) `@cordisjs/plugin-capability` is a different axis entirely — a **permission/capability-security** service (named permissions with inheritance/dependency, tested against a session via `ctx.capability.test`). It is a candidate for the deferred permissions/sandbox work (the `tools/execute` veto seam), NOT a mechanism for swapping implementations. +> **"Capability" — two unrelated meanings.** (1) The *seam pattern* above ("one plugin provides a capability, another needs it") is realized by plain Cordis **services + `inject`**: a provider registers a service (`ctx.bash`, declared in `interface Context`); a consumer declares `inject: ['bash']` and its fiber stays pending until the service exists, tearing down via HMR if it later vanishes. No extra library is needed. (2) `@cordisjs/plugin-capability` is a different axis entirely — a **permission/capability-security** service (named permissions with inheritance/dependency, tested against a session via `ctx.capability.test`). It is a candidate for the deferred permissions/sandbox work (the `tools/pre-execute` deny/ask gate), NOT a mechanism for swapping implementations. ## The vocabulary (dsh-llm) @@ -102,7 +102,7 @@ Tool schemas are deliberately **part of the assembly**: "what the model is told `ToolRegistry.register()` takes schema + `execute()`. The registry feeds its schemas into the system-prompt assembly automatically. -`execute()` runs through the **`tools/execute` waterfall** — the single seam where sandbox, permission, hooks, and plan-mode plugins wrap or veto a call. This collapses Claude Code's validate → PreToolUse → permission → execute → PostToolUse pipeline into ordered waterfall listeners. +`execute()` runs through a **two-waterfall pipeline** — `tools/pre-execute` (the allow/deny/ask gate) → core dispatch → `tools/post-execute` (inspect/replace the result, attach context) — the seams where sandbox, permission, hooks, and plan-mode plugins gate or transform a call. This maps Claude Code's validate → PreToolUse → permission → execute → PostToolUse pipeline onto two ordered waterfalls: `pre-execute` returns a `PreToolDecision` (allow/deny/ask), `post-execute` a `PostToolDecision` (accept/block, optionally replacing content or attaching `additionalContext`). Core dispatch sits between them as plain code, inside `execute`'s outer try/catch, with the tool body's own try/catch preserved so a thrown tool still reaches `post-execute` as an `isError`. **TODO**: tool shapes get revisited now that real tools exist (the bash suite landed; the `TODO(review)` in dsh-tools is still open) — e.g. a concurrency-safety hint for parallel execution; phase 1 executes tool calls sequentially. @@ -126,11 +126,16 @@ Tool schemas are deliberately **part of the assembly**: "what the model is told - **Step**: one model request + its tool executions. ``` +create agent → emit agent/session-start(source) ⟵ once, before turn 1 (startup|resume) forever: wait for queued messages (idle) emit agent/status(running) TURN (error-contained — a throwing plugin ends the turn, never the loop): - drain queued → 'turn/start' → session('user/message'…) → emit agent/turn-start + 'turn/start' + each queued msg: waterfall agent/prompt-submit ⟵ allow (rewrite/+context) | block + allow → session('user/message'…); inject additionalContext + every prompt blocked → 'turn/end'(rejected), 0 steps ⟵ zero-step turn, model never called + emit agent/turn-start STEP loop: drain steering (late steering from previous step's listeners) session('step/start') ⟵ durable step boundary (no agent/* mirror) @@ -145,15 +150,19 @@ forever: msg = waterfall agent/step-result ⟵ runs BEFORE the log append, so the session('assistant/message' {content, usage?}) log records what tool dispatch uses each tool-call (sequential, abort-checked between calls): - session('tool/call'); ctx.tools.execute() ⟵ waterfall tools/execute + session('tool/call'); ctx.tools.execute() ⟵ waterfall tools/pre-execute (allow/ + deny/ask gate) → dispatch → tools/post-execute (accept/block, replace, +context) tool execution may append tool-owned session events, e.g. `todo/write` session('tool/result') + append buffered post-execute additionalContext → session('context/message')(s) + ⟵ after ALL tool/results (adjacency) drain steering → session('steering/message'); emit agent/steering session('step/end') ⟵ durable step boundary (no agent/* mirror) - cont = waterfall agent/turn-continuation(default = hadToolCalls || steered) - steering pending forces cont = true (from continuation listeners OR from - step/end session-event listeners — the /goal pattern; hasSteering override) - if !cont: break + cont = waterfall agent/turn-continuation(default = {action: hadToolCalls||steered + ? 'continue' : 'stop'}) → ContinuationDecision + a continue's reason is recorded as next-step steering (same turn); steering pending + also forces continue (continuation OR step/end listeners — the /goal pattern) + if action==stop: break session('turn/end'); emit agent/turn-end await ctx.parallel('session/flush', session) ⟵ durability checkpoint (failure reported via agent/error, not fatal) @@ -163,7 +172,7 @@ forever: Error containment: a throwing `agent/turn-continuation` listener or a broken step ends the **turn** with `turn/end { reason: { kind: 'error', step, message, code? } }` — the failure's step number rides on the durable turn reason (there is no separate session `error` event); live diagnostics fire via `agent/error`. Never the driver loop. An adapter that ends its stream with a `finish {kind:'error'}` or `{kind:'aborted'}` chunk (the in-band error path, for adapters that can't throw mid-stream) is likewise translated into a step error, so the turn ends `error`/`aborted` instead of logging a normal `completed` assistant message. A `cancel()` is honored mid-stream **and** between tool calls; disposal mid-turn ends the turn with reason `disposed` and emits `agent/status('disposed')`. -Turn-end reasons: a turn ends with one `TurnEndReason` — `completed`, `aborted`, `error`, `disposed`, or `max-tokens`. `max-tokens` mirrors the model-call `FinishReason` of the same name (DeepSeek's `length`): a step that hit the output-token ceiling makes the turn end `max-tokens` rather than `completed`, by the rule *any `max-tokens` step in the turn surfaces as `max-tokens`* (a continuation plugin may run further steps after one, but the cut-short fact wins; the `disposed`/`aborted`/`error` outcomes still take precedence). This lets a consumer distinguish a clean stop from a truncated one (the ACP bridge maps it to the `max_tokens` stop reason). `TurnEndReason` is merge-extensible; `refusal` and `max_turn_requests` are the next variants to add when an adapter/loop first emits them. +Turn-end reasons: a turn ends with one `TurnEndReason` — `completed`, `aborted`, `error`, `disposed`, `max-tokens`, `rejected`, or `interrupted`. `max-tokens` mirrors the model-call `FinishReason` of the same name (DeepSeek's `length`): a step that hit the output-token ceiling makes the turn end `max-tokens` rather than `completed`, by the rule *any `max-tokens` step in the turn surfaces as `max-tokens`* (a continuation plugin may run further steps after one, but the cut-short fact wins; the `disposed`/`aborted`/`error` outcomes still take precedence). `rejected` is a zero-step turn whose entire prompt batch was blocked by an `agent/prompt-submit` hook (the turn still opens and closes balanced; the ACP bridge maps it to `cancelled`). `interrupted` is synthesized by a persistence backend closing a crash-orphaned turn on reload. This lets a consumer distinguish a clean stop from a truncated/blocked one (the ACP bridge maps `max-tokens` to the `max_tokens` stop reason). `TurnEndReason` is merge-extensible; `refusal` and `max_turn_requests` are the next variants to add when an adapter/loop first emits them. A failure that happens once the turn is already closed has no in-turn position for a turn-end error reason (the turn already ended). So a rejecting `session/flush` (the post-`turn/end` durability checkpoint) and a throwing `agent/turn-end` listener are reported via `agent/error` + the logger only, NOT as a session event; the turn stays balanced and the persistence backend keeps its buffered events for the next flush. @@ -189,7 +198,7 @@ Every MVP feature (including the TODO-marked ones), with the mechanism that impl | MVP feature | Plugin mechanism | |---|---| -| Hook system (user + project level) | listeners on `agent/request`, `agent/step-result`, `tools/execute`, `agent/turn-continuation`; a hooks plugin bridges config files to shell commands | +| Hook system (user + project level) | listeners on `agent/session-start`, `agent/prompt-submit`, `agent/request`, `agent/step-result`, `tools/pre-execute`, `tools/post-execute`, `agent/turn-continuation` (each interception waterfall returns a typed Decision); a hooks bridge plugin maps config files / shell commands onto those seams, a native hook plugin uses them directly | | `/goal` | force-continue via `agent/turn-continuation` + `steer()` reminders | | `/loop` | on `agent/turn-end`, `send()` the next iteration; or force-continue | | Dynamic workflow | orchestrator plugin on `agent/turn-end` (or the `step/end` session event) driving `send`/`steer` (+ sub-agents later) | @@ -200,9 +209,9 @@ Every MVP feature (including the TODO-marked ones), with the mechanism that impl | AGENTS.md (subdir, on-touch) + file-change notices | `agent.inject()` from a watcher / tool-result listener | | Built-in tools (Read/Write/Edit/Bash/…) | `ctx.tools.register()`; schemas flow into the assembly automatically. **Bash: implemented** — `dsh-bash` (seam) + `dsh-bash-local` (subprocesses) + `dsh-tool-bash` (`bash`/`bash_output`/`bash_kill`, incl. background tasks). **`todo_write`: implemented** — `dsh-tool-todo` writes the whole task list to the session log (`todo/write`), rendered as a stdio checklist / ACP `plan` | | ToolSearch / progressive disclosure | wrap `agent/request`, filter `req.tools` | -| Tool sandbox (landlock / sandbox-exec) | wrap `tools/execute`, or implement a sandboxing `BashExecutor` (the dsh-bash seam) | -| Permission system / AskUserQuestion | wrap `tools/execute` (veto or ask); register an ask tool | -| Plan mode | wrap `tools/execute` (deny writes) + `agent/request` (inject mode prompt) | +| Tool sandbox (landlock / sandbox-exec) | `tools/pre-execute` (deny), or implement a sandboxing `BashExecutor` (the dsh-bash seam) | +| Permission system / AskUserQuestion | `tools/pre-execute` (deny/ask); register an ask tool | +| Plan mode | `tools/pre-execute` (deny writes) + `agent/request` (inject mode prompt) | | Sub-agents (spawn / fork / steer) | TODO seam on `AgentLoop.create()`; fork = seed Session with parent events; `steer()` on the child handle | | MCP | one plugin per server: discover tools → `ctx.tools.register()` | | Skills | section + tool registration; `inject()` skill content on invocation | diff --git a/docs/cookbook/extension-cookbook.md b/docs/cookbook/extension-cookbook.md index e6c0378361..98565a5c9e 100644 --- a/docs/cookbook/extension-cookbook.md +++ b/docs/cookbook/extension-cookbook.md @@ -8,24 +8,20 @@ A tool registers on `ctx.tools`. The annotated `defineTool` example (typed `exec ## A hook plugin (permission gate) -A hook wraps the `tools/execute` waterfall to veto or rewrite a call — the seam where sandbox, permission, and plan-mode plugins live. +A hook returns a typed decision from the `tools/pre-execute` gate to allow or deny a call — the seam where sandbox, permission, and plan-mode plugins live. (A "native hook" is just this: an ordinary cordis plugin on the interception seams, returning typed decisions — no external protocol needed.) ```ts import type { Context } from 'cordis' -import type { ToolExecution } from '@deepseek-ai/dsh-tools' +import type { PreToolDecision, ToolExecution } from '@deepseek-ai/dsh-tools' declare function isAllowed(exec: ToolExecution): Promise export const name = 'permission-gate' export function apply(ctx: Context) { - ctx.on('tools/execute', async (exec, next) => { + ctx.on('tools/pre-execute', async (exec, next): Promise => { if (!(await isAllowed(exec))) { - return { - callId: exec.callId, - content: [{ type: 'text', text: 'Denied by policy.' }], - isError: true, - } + return { kind: 'deny', reason: 'Denied by policy.' } } return next() }) diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index 3fac9263db..d37d2d4070 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages. Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:165`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:228`](../../packages/core/agent/src/types.ts) #### `agent/disposed` — emit @@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:171`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:234`](../../packages/core/agent/src/types.ts) #### `agent/error` — emit @@ -49,7 +49,19 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:245`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:334`](../../packages/core/agent/src/types.ts) + +#### `agent/prompt-submit` — waterfall + +Waterfall: decide what happens to ONE drained queued message before it becomes a `user/message` — allow (optionally rewriting the prompt bytes or attaching `additionalContext`) or block it. Fires inside the already-open turn, per drained message. Maps onto Claude Code's `UserPromptSubmit` hook. Call `next()` to delegate to the default (allow unchanged), or return a PromptDecision without calling `next()` to short-circuit. + +```ts cordis-catalog +'agent/prompt-submit'(agent: Agent, content: ContentBlock[], source: MessageSource, next: () => Promise): Promise +``` + +Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) + +Source: [`packages/core/agent/src/types.ts:293`](../../packages/core/agent/src/types.ts) #### `agent/queued` — emit @@ -61,7 +73,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:184`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:247`](../../packages/core/agent/src/types.ts) #### `agent/request` — waterfall @@ -73,7 +85,19 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:214`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:300`](../../packages/core/agent/src/types.ts) + +#### `agent/session-start` — emit + +The agent's session lifecycle began, fired once before its first turn. `source` says why (SessionStartSource: fresh startup, a resumed persisted session, …). A pure NOTIFICATION (emit, not waterfall): it carries no veto — a session-start listener that wants to seed context does so via `agent.inject()` (a `context/message` the first request sees), not by returning a decision. Cannot block the session from starting; that gap is deliberate (a bridge logs/injects, it does not gate startup). + +```ts cordis-catalog +'agent/session-start'(agent: Agent, source: SessionStartSource): void +``` + +Types: [Agent](../core-data-structures/core.md) + +Source: [`packages/core/agent/src/types.ts:260`](../../packages/core/agent/src/types.ts) #### `agent/status` — emit @@ -85,7 +109,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:178`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:241`](../../packages/core/agent/src/types.ts) #### `agent/steering` — emit @@ -97,7 +121,7 @@ Steering content was injected into a running turn. Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:239`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:328`](../../packages/core/agent/src/types.ts) #### `agent/step-result` — waterfall @@ -109,7 +133,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:220`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:306`](../../packages/core/agent/src/types.ts) #### `agent/stream-chunk` — emit @@ -121,19 +145,19 @@ A raw StreamChunk arrived from the model (token-level UI/log feed). Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md) -Source: [`packages/core/agent/src/types.ts:234`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:323`](../../packages/core/agent/src/types.ts) #### `agent/turn-continuation` — waterfall -Waterfall: override the turn-continuation decision. The default (computed by the loop) is `hadToolCalls || steeringInjected`. Listeners can force-continue (/goal, /loop) or force-stop (budget guards). +Waterfall: override the turn-continuation decision via a typed ContinuationDecision. The loop's `defaultDecision` is `continue` when the step had tool calls or steering was injected, else `stop`. Listeners force-continue (`/goal`, `/loop` — optionally attaching a `reason` recorded as next-step steering) or force-stop (budget guards). Call `next()` to delegate to the default, or return a decision to override. ```ts cordis-catalog -'agent/turn-continuation'(agent: Agent, turn: number, defaultDecision: boolean, next: () => Promise): Promise +'agent/turn-continuation'(agent: Agent, turn: number, defaultDecision: ContinuationDecision, next: () => Promise): Promise ``` Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:227`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:316`](../../packages/core/agent/src/types.ts) #### `agent/turn-end` — emit @@ -145,7 +169,7 @@ A turn ended. `reason` distinguishes a clean stop from a truncated, aborted, fai Types: [Agent](../core-data-structures/core.md) · [TurnEndReason](../core-data-structures/session.md) -Source: [`packages/core/agent/src/types.ts:205`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:281`](../../packages/core/agent/src/types.ts) #### `agent/turn-start` — emit @@ -157,7 +181,7 @@ A turn began. `turn` is the 1-based turn number within the session. Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:197`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:273`](../../packages/core/agent/src/types.ts) ### `llm/*` @@ -261,19 +285,31 @@ A tool was registered or unregistered (the available tool set changed). 'tools/change'(): void ``` -Source: [`packages/core/tools/src/index.ts:48`](../../packages/core/tools/src/index.ts) +Source: [`packages/core/tools/src/index.ts:66`](../../packages/core/tools/src/index.ts) -#### `tools/execute` — waterfall +#### `tools/post-execute` — waterfall -Waterfall around every tool execution — the single seam where sandbox, permission, hook, and plan-mode plugins wrap or veto a call. Listeners receive `(exec, next)`: call `next()` to proceed (possibly around your own logic), or return a ToolExecutionResult without calling `next()` to short-circuit (veto). +Waterfall AFTER a tool runs — where hook plugins inspect the result and accept it (optionally REPLACING the model-facing content, and/or attaching `additionalContext` for the next request) or block it with corrective `feedback` (Claude Code's `PostToolUse`). Listeners receive `(exec, result, next)`: call `next()` to delegate to the default (accept unchanged), or return a PostToolDecision to override. The core tool dispatch sits between the two waterfalls as plain code, all inside `execute`'s outer try/catch (and the tool body keeps its own inner try/catch, so a thrown tool still reaches `post-execute` as an `isError` result). ```ts cordis-catalog -'tools/execute'(this: ToolRegistry, exec: ToolExecution, next: () => Promise): Promise +'tools/post-execute'(this: ToolRegistry, exec: ToolExecution, result: ToolExecutionResult, next: () => Promise): Promise ``` Types: [ToolExecution](../core-data-structures/tools.md) · [ToolExecutionResult](../core-data-structures/tools.md) -Source: [`packages/core/tools/src/index.ts:43`](../../packages/core/tools/src/index.ts) +Source: [`packages/core/tools/src/index.ts:61`](../../packages/core/tools/src/index.ts) + +#### `tools/pre-execute` — waterfall + +Waterfall BEFORE a tool runs — the gate where sandbox, permission, and hook plugins allow or deny a call (Claude Code's `PreToolUse`). Listeners receive `(exec, next)`: call `next()` to delegate to the default (allow), or return a PreToolDecision without calling `next()` to short-circuit. A `deny` skips dispatch and yields an `isError` result; the tool body never runs. Input rewrite is deliberately NOT offered here (see PreToolDecision); `ask` degrades to deny until the permission system lands (`FIXME(permissions)`). + +```ts cordis-catalog +'tools/pre-execute'(this: ToolRegistry, exec: ToolExecution, next: () => Promise): Promise +``` + +Types: [ToolExecution](../core-data-structures/tools.md) + +Source: [`packages/core/tools/src/index.ts:47`](../../packages/core/tools/src/index.ts) ## Services @@ -446,7 +482,7 @@ async execute(exec: ToolExecution): Promise Types: [ToolDefinition](../core-data-structures/tools.md) · [ToolExecution](../core-data-structures/tools.md) · [ToolExecutionResult](../core-data-structures/tools.md) -Source: [`packages/core/tools/src/index.ts:277`](../../packages/core/tools/src/index.ts) +Source: [`packages/core/tools/src/index.ts:341`](../../packages/core/tools/src/index.ts) ## Inherited tier (cordis core + loader/hmr/timer) diff --git a/docs/core-data-structures/core.md b/docs/core-data-structures/core.md index 757e6fb400..78fc36edd9 100644 --- a/docs/core-data-structures/core.md +++ b/docs/core-data-structures/core.md @@ -306,7 +306,42 @@ interface Agent { } ``` -`AgentStatus` is `'idle' | 'running' | 'disposed'`. `AgentId` is a branded string. `AgentOptions` (`model?`, `systemPrompt?`) is merge-extensible — plugins add creation options by declaration merging. The `agent/*` event taxonomy (lifecycle, turn/step boundaries, the `agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls) is in [architecture.md § Event taxonomy](../architecture.md#event-taxonomy). +`AgentStatus` is `'idle' | 'running' | 'disposed'`. `AgentId` is a branded string. `AgentOptions` (`model?`, `systemPrompt?`) is merge-extensible — plugins add creation options by declaration merging. The `agent/*` event taxonomy (lifecycle, turn/step boundaries, the `agent/prompt-submit`/`agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls) is in [architecture.md § Event taxonomy](../architecture.md#event-taxonomy). + +## Interception decisions + +Each `agent/*` interception waterfall returns a small, seam-specific typed union — the unified Decision idiom (the tool seams' `PreToolDecision`/`PostToolDecision` in [tools.md](tools.md) follow the same shape). A CC/Codex hook bridge maps its `permissionDecision`/`decision`/`continue`/`additionalContext` fields onto these; a native plugin returns them directly. They share one envelope for model-facing context, `HookContext`, which is `inject()`ed as a `context/message` and so carries a REQUIRED `source` (a missing source would default to `{kind:'user'}` and mislabel plugin context as a user prompt). + +Source: [`packages/core/agent/src/types.ts`](../../packages/core/agent/src/types.ts) + +```ts type-equiv +interface HookContext { + content: ContentBlock[] + source: MessageSource +} +``` + +`agent/prompt-submit` returns a `PromptDecision` (allow a drained queued message — optionally rewriting its `content` or attaching `additionalContext` — or block it; a batch whose every prompt is blocked opens a zero-step turn that ends `rejected`): + +```ts type-equiv +type PromptDecision = + | { kind: 'allow'; content?: ContentBlock[]; additionalContext?: HookContext } + | { kind: 'block'; reason: string } +``` + +`agent/turn-continuation` returns a `ContinuationDecision` (the loop's default is `continue` when the step had tool calls or steering was injected, else `stop`; a `continue` `reason` is recorded as next-step steering in the same turn — the typed `/goal` pattern): + +```ts type-equiv +type ContinuationDecision = + | { action: 'stop' } + | { action: 'continue'; reason?: HookContext } +``` + +`agent/session-start` carries a `SessionStartSource` (why the session lifecycle began; a bridge keys its SessionStart matcher on it): + +```ts type-equiv +type SessionStartSource = 'startup' | 'resume' | 'clear' | 'compact' +``` ## `ToolDefinition` diff --git a/docs/core-data-structures/session.md b/docs/core-data-structures/session.md index dc1c8e228a..21c92612f2 100644 --- a/docs/core-data-structures/session.md +++ b/docs/core-data-structures/session.md @@ -181,6 +181,16 @@ interface TurnEndReasonMap { error: { kind: 'error'; step: number; message: string; code?: string } disposed: { kind: 'disposed' } 'max-tokens': { kind: 'max-tokens' } + /** + * The turn's entire prompt batch was BLOCKED before any step ran — every + * drained queued message was vetoed by an `agent/prompt-submit` listener (a + * hook). The turn still opened (so the boundary stays balanced and the block + * is a durable in-turn fact), but ran zero steps. `reason` carries the block + * message from the vetoing decision. Distinct from `aborted` (a user-driven + * cancel) and `error` (a failure): the prompt was rejected by policy, not + * interrupted or broken. A UI renders it as "prompt blocked by hook". + */ + rejected: { kind: 'rejected'; reason: string } /** * The turn never ended on its own: the process crashed mid-turn and a * persistence backend later closed the orphaned (open) turn on reload so the @@ -195,7 +205,7 @@ interface TurnEndReasonMap { } ``` -`max-tokens` mirrors the model-call `FinishReason` of the same name: any `max-tokens` step in a turn makes the whole turn end `max-tokens` (the cut-short fact wins over a later continuation), so a consumer can tell a clean stop from a truncated one. `interrupted` is the one reason no loop emits — it is synthesized by crash recovery (see [persistence.md](persistence.md)). Both maps are merge-extensible. +`max-tokens` mirrors the model-call `FinishReason` of the same name: any `max-tokens` step in a turn makes the whole turn end `max-tokens` (the cut-short fact wins over a later continuation), so a consumer can tell a clean stop from a truncated one. `rejected` is a zero-step turn whose whole prompt batch an `agent/prompt-submit` hook blocked (the ACP bridge maps it to `cancelled`). `interrupted` is the one reason no loop emits — it is synthesized by crash recovery (see [persistence.md](persistence.md)). Both maps are merge-extensible. ## The turn-enclosure invariant diff --git a/docs/core-data-structures/tools.md b/docs/core-data-structures/tools.md index f255fdbc32..4d6306de14 100644 --- a/docs/core-data-structures/tools.md +++ b/docs/core-data-structures/tools.md @@ -73,7 +73,7 @@ type InferArgs = Simplify< ## Execution: the `tools/execute` waterfall shapes -`ctx.tools.execute()` runs each call through the `tools/execute` waterfall — the single seam where sandbox, permission, hook, and plan-mode plugins wrap or veto. The pending call is a `ToolExecution`; the outcome is a `ToolExecutionResult`. +`ctx.tools.execute()` runs each call through a two-waterfall pipeline — `tools/pre-execute` (the allow/deny/ask gate) → core dispatch → `tools/post-execute` (inspect/replace the result, attach context) — the seams where sandbox, permission, hook, and plan-mode plugins gate or transform a call. The pending call is a `ToolExecution`; the outcome is a `ToolExecutionResult`. ```ts type-equiv interface ToolExecution { @@ -98,10 +98,36 @@ interface ToolExecutionResult { * text in `content` is always present; this is extra structure for code. */ error?: ToolErrorInfo + /** + * Extra model-facing context a `tools/post-execute` listener attached for the + * NEXT request (Claude Code's PostToolUse `additionalContext`). It is NOT part + * of this call's `content` — `content`/`feedback` shape the tool RESULT, but + * `additionalContext` is a SEPARATE `context/message`. A step can carry + * multiple tool calls, so the loop BUFFERS every call's `additionalContext` + * and appends them only AFTER all `tool/result`s for the step, keeping + * tool-call/result adjacency intact. Carried on the result purely to ferry it + * from `execute()` up to the loop's per-step buffer. + */ + additionalContext?: HookContext } ``` -A waterfall listener receives `(exec, next)`: call `next()` to proceed (possibly around your own logic), or return a `ToolExecutionResult` without calling `next()` to veto. An unregistered tool routes through the same catch as a tool-thrown error, so both failure classes get a structured `{ name, code }` (`ToolNotFoundError` → `UNKNOWN_TOOL`) — the loop records a failed tool call instead of failing the whole turn. +Each interception waterfall returns a typed **Decision** (the idiom shared with the `agent/*` seams). `tools/pre-execute` listeners receive `(exec, next)` and return a `PreToolDecision`; `tools/post-execute` listeners receive `(exec, result, next)` and return a `PostToolDecision`: + +```ts type-equiv +type PreToolDecision = + | { kind: 'allow' } + | { kind: 'deny'; reason: string } + | { kind: 'ask'; reason?: string } +``` + +```ts type-equiv +type PostToolDecision = + | { kind: 'accept'; content?: ContentBlock[]; additionalContext?: HookContext } + | { kind: 'block'; feedback: ContentBlock[]; additionalContext?: HookContext } +``` + +Call `next()` to delegate to the default (allow / accept-unchanged), or return a decision to short-circuit. A `pre-execute` `deny` (or `ask`, which degrades to deny until the permission system lands) skips dispatch and yields an `isError` result; input rewrite is deliberately NOT offered on `PreToolDecision` (it would desync the pre-execution audit/history/UI from what ran — its own proposed RFC). A `post-execute` `accept` may replace the model-facing `content` (clean, because `tool/result` is logged after `execute()` returns); a `block` turns the call into an `isError` whose content is the corrective `feedback`. Core dispatch sits between the waterfalls as plain code; the tool body keeps its own try/catch so a thrown tool still reaches `post-execute` as an `isError`. An unregistered tool routes through the same catch as a tool-thrown error, so both failure classes get a structured `{ name, code }` (`ToolNotFoundError` → `UNKNOWN_TOOL`) — the loop records a failed tool call instead of failing the whole turn. ## Tool-presentation UI vocabulary diff --git a/docs/rfc/README.md b/docs/rfc/README.md index 9b1996e89b..a05a7d5c5c 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -45,6 +45,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Multiplex concurrent ACP sessions over one connection](proposed/feature/2026-06-14-acp-multi-session.md) | 2026-06-14 | | [Optional Code Mode — model writes TypeScript against an SDK of all tools](proposed/feature/2026-06-15-optional-code-mode.md) | 2026-06-15 | | [Compaction as a capability seam (abstract contract + basic backend)](proposed/feature/2026-06-18-compaction-capability-seam.md) | 2026-06-18 | +| [Pre-tool input rewrite — a consistent design](proposed/feature/2026-06-30-pre-tool-input-rewrite.md) | 2026-06-30 | ### Simplification @@ -86,6 +87,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Subagent capability seam](implemented/feature/2026-06-21-subagent-capability-seam.md) | 2026-06-21 | | [ACP subagent backend (out-of-process delegation)](implemented/feature/2026-06-22-acp-subagent-backend.md) | 2026-06-22 | | [The `todo_write` tool — model task list as event-sourced session state](implemented/feature/2026-06-29-todo-write-tool.md) | 2026-06-29 | +| [Interception seams — the typed-Decision surface a hook programs against](implemented/feature/2026-06-30-interception-seams.md) | 2026-06-30 | ### Simplification diff --git a/docs/rfc/implemented/feature/2026-06-30-interception-seams.md b/docs/rfc/implemented/feature/2026-06-30-interception-seams.md new file mode 100644 index 0000000000..5c00760c46 --- /dev/null +++ b/docs/rfc/implemented/feature/2026-06-30-interception-seams.md @@ -0,0 +1,45 @@ +# RFC: Interception seams — the typed-Decision surface a hook programs against + +Status: implemented (accepted 2026-06-30) + + + +## Context + +The harness needs a hooks subsystem: users extend or gate the agent at lifecycle points the way Claude Code (CC) and Codex do. The key reframe driving this design is that **"native hooks" are not a package** — a native hook is just an ordinary Cordis plugin subscribing to the canonical lifecycle events. So the real product is a *powerful, well-typed canonical event surface*; the CC/Codex bridges (a later stack PR) are merely translators that map an external shell-hook protocol onto that same surface. Anything a bridge can do, a plain plugin can do directly — more powerfully (no serialization boundary, full `ctx`, typed returns). + +Before this change the interception surface was incomplete and inconsistent for that goal: there was no per-prompt seam (CC's `UserPromptSubmit`), no session-start signal (CC's `SessionStart`), the single `tools/execute` waterfall conflated the pre-gate and post-inspect phases (CC splits `PreToolUse`/`PostToolUse`), and `agent/turn-continuation` returned a bare `boolean` with no room for a force-continue *reason*. The [event-domain-semantics RFC](../architecture/2026-06-30-event-domain-semantics.md) (the stack's first change) pinned down the three-domain rule and the typed-Decision idiom as the interception convention; this RFC builds the actual seams on top of it. + +## Decision + +Add/​reshape the interception seams so every one returns a small, seam-specific **typed Decision union**, and the set covers the hook points in scope (`session-start`, `prompt-submit`, `pre-tool`, `post-tool`, `stop`-via-continuation). + +**New `agent/*` events** (`dsh-agent`): +- `agent/session-start(agent, source)` — emit, once before turn 1, carrying a `SessionStartSource` (`startup` for a fresh/forked create, `resume` for a reloaded persisted session; `clear`/`compact` reserved). A pure notification — it CANNOT block startup (a deliberate gap: a bridge logs/injects, it does not gate startup). A listener seeds context via `agent.inject()`. +- `agent/prompt-submit(agent, content, source, next) → PromptDecision` — waterfall, fired per drained queued message inside the open turn, before the `user/message` append. `allow` (optionally rewriting the prompt `content` or attaching `additionalContext`) or `block`. + +**Reshaped** `agent/turn-continuation` from `(…, defaultDecision: boolean) → boolean` to `(…, defaultDecision: ContinuationDecision) → ContinuationDecision`. A `{action:'continue', reason?}` may carry model-facing context recorded as next-step steering in the same turn — the typed twin of the existing `/goal` step-end-steer pattern. + +**Split** the single `tools/execute` waterfall into `tools/pre-execute` (→ `PreToolDecision` allow/deny/ask gate) and `tools/post-execute` (→ `PostToolDecision` accept/block, optionally replacing content or attaching `additionalContext`). Core dispatch sits between them as plain code inside `ToolRegistry.execute`'s outer try/catch, and the tool body keeps its own inner try/catch so a thrown tool still becomes an `isError` result that `post-execute` listeners can inspect. + +**New `TurnEndReason` variant** `rejected` (`dsh-session`): a turn whose entire prompt batch was blocked by `prompt-submit`. + +### Three load-bearing loop decisions + +1. **Always open the turn first; a fully-blocked batch is a zero-step `rejected` turn.** `prompt-submit` fires AFTER `turn/start`, per message. A batch whose every prompt is blocked does NOT skip the turn — it opens a zero-step turn that closes with `rejected`. This one move resolves three problems at once: (1) turn-enclosure holds (every event has an open turn to live in); (2) `agent/turn-end` fires and the ACP bridge settles normally (mapping `rejected`→`cancelled`) instead of hanging; (3) the block reason is a durable in-turn fact. An `allow`'s `additionalContext` is `inject()`ed into this now-open turn. + +2. **Post-tool `additionalContext` is buffered and appended AFTER all `tool/result`s.** `content`/`feedback` shape the result `execute()` returns, but `additionalContext` is a SEPARATE `context/message`, and a single step can carry multiple tool calls. Appending context right after each result would interleave `result(c1) → context → result(c2)` and break tool-call/result adjacency. So `execute()` surfaces `additionalContext` on its `ToolExecutionResult`, and the loop buffers every per-call context for the step and appends them as `context/message`(s) only after every `tool/result` is appended. + +3. **A forced `continue` `reason` is enqueued through the steering channel**, so the next step's top-of-loop drain records it as steering for the continued turn — next-*step* steering within the SAME turn, not a next-*turn* prompt (matching the existing `hasSteering` force-continue override). + +### Pre-tool INPUT rewrite is DEFERRED (the over-reach signal) + +`PreToolDecision` is allow/deny/ask only — **no `arguments` rewrite**. Output replacement (`PostToolDecision.accept.content`) is safe because `tool/result` is logged AFTER execution (one source of truth). Input rewrite is NOT safe today: `assistant/message` (the model-history source) and `tool/call` (the audit record) are both logged BEFORE execution, and live consumers READ `tool/call.arguments` for presentation (the ACP bridge remembers them for `presentResult`; `dsh-tool-bash` derives the title/cwd/terminal-vs-background from them). A rewrite that changed only execution would make the UI show one command while another RAN. Designing that consistently (rewriting the audit + history + presentation as one unit) is a real consistency-design problem CC itself warns is racy — so it gets its own [proposed RFC](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md), and `TODO(pre-tool-input-rewrite)` anchors it at the loop's pre-execute call site. This does not regress any production consumer (no production `tools/execute` listener mutated `exec.arguments`). The low-level capability to mutate `exec` in a `pre-execute` listener still exists (unadvertised — a test shim uses it to thread a generated id), but it is not a first-class advertised contract. + +### What this PR does NOT do + +It does **not** declare `hook/*` SessionEvents (the durable hook-invocation log) — those belong to the `dsh-hook-protocol` library (a later stack PR), because a native plugin can already use the typed Decisions without a durable hook log. A worked native-plugin example/test in this PR (`packages/core/agent-loop/tests/interception.spec.ts`) proves all the seams compose end-to-end through the REAL loop with NO `hook/*` involved — the concrete proof that "native hooks are just a plugin". Compaction (`PreCompact`/`PostCompact`), the Notification hook, Codex `PermissionRequest`, the permission/`ask` system, and the Stop loop-guard remain deferred (`FIXME(permissions)` marks the `ask`→deny degrade). + +## Consequences + +The canonical interception surface is now complete and uniformly typed: a native plugin returns typed decisions directly, and a CC/Codex bridge maps its protocol fields onto the same unions. The loop gained four firing points (session-start emit, prompt-submit waterfall, the post-tool context buffer, the continuation reshape) and the `dsh-tools` registry runs a two-waterfall pipeline; both are documented in [architecture.md](../../../architecture.md) and the package READMEs, and the decision types in [core-data-structures](../../../core-data-structures/core.md#interception-decisions) + [tools.md](../../../core-data-structures/tools.md). All existing `tools/execute` and `turn-continuation` listeners (tests, docs) migrated to the new seams. The ACP bridge maps the new `rejected` reason to `cancelled` (its codec). A pure internal change with no editor-visible transcript shift for the existing scenarios — the new behavior only fires when a hook is registered — so the snapshot goldens are unchanged; a hook-driven snapshot scenario lands with the bridges (the PR that makes a hook observable end-to-end through ACP). diff --git a/docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md b/docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md new file mode 100644 index 0000000000..4c91b0c4a4 --- /dev/null +++ b/docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md @@ -0,0 +1,39 @@ +# RFC: Pre-tool input rewrite — a consistent design (proposed) + +Status: proposed (2026-06-30) + + + +## Context + +The [interception-seams RFC](../../implemented/feature/2026-06-30-interception-seams.md) added `tools/pre-execute` returning a `PreToolDecision` (allow/deny/ask) — but deliberately NOT input rewrite (a hook changing a tool call's `arguments` before it runs). Claude Code's `PreToolUse` hook offers an `updatedInput`, so a faithful CC bridge wants the same. This RFC designs that, separately, because doing it consistently is a real problem — not a field to bolt onto the allow decision. + +## The problem: three readers of pre-execution arguments + +In the loop, a tool call's arguments are committed to the log and read by live consumers BEFORE the tool executes: + +1. **`assistant/message`** is appended before tool dispatch — it is the model-history source `deriveMessages()` replays, so it carries the tool-call arguments the model itself emitted. +2. **`tool/call`** is the durable AUDIT record, appended before `ctx.tools.execute()`. +3. **Live presentation reads `tool/call.arguments`**: the ACP bridge remembers them and passes them to `presentResult`; `dsh-tool-bash` derives the card title, the rawInput, the cwd, and the terminal-vs-background treatment from them. + +So an "input rewrite" that changes ONLY what executes would make the UI show one command while another RAN, and render result state against the wrong arguments — a real inconsistency, not a documentable gap. (The existing low-level capability to mutate `exec.arguments` in a listener has exactly this latent inconsistency; it is unadvertised precisely because of this.) + +## Proposed design (sketch — to validate against the code when built) + +Treat input rewrite as a consistency unit: when a `pre-execute` hook supplies `updatedInput`, the rewrite must be reflected in ALL three readers, atomically, before execution: + +- The `tool/call` audit event records the REWRITTEN arguments (with the original retained in a sidecar field for the audit trail — a hook changed the call, and both the original and the effective arguments are facts worth keeping). +- The `assistant/message` in derived history must agree with what executed — options to evaluate: rewrite the assistant message's tool-call block in place (changes what the model "sees it said"), or record a separate correction the next request carries. The CC model is that the model sees the rewrite took effect. +- Presentation (`presentCall`/`presentResult`) reads the rewritten arguments, so the UI shows what actually ran. + +The shape would extend `PreToolDecision` with an allow-variant `arguments` (or a dedicated `{kind:'rewrite', arguments}`), and the loop would thread the rewrite through the three readers above rather than only into `ctx.tools.execute()`. + +## Why not now + +The interception-seams RFC notes input rewrite "fought the code across two review rounds" — the signal AGENTS.md names for an over-reaching change. Shipping allow/deny/ask first keeps the seam honest (no advertised contract that silently desyncs the UI), and a CC/Codex bridge that receives an `updatedInput` logs it and surfaces a faithful-but-degraded warning (like `ask`→deny) until this lands. This RFC is the home for the consistent design; `TODO(pre-tool-input-rewrite)` in the loop's pre-execute call site anchors it. + +## Open questions + +- Does rewriting the `assistant/message` tool-call block corrupt any provider's expectation on replay, or is a separate correction safer? +- Should the original arguments be preserved on the `tool/call` event (audit) and, if so, under what field? +- How does this interact with a future permission `ask` flow (a user approving a rewritten call)? diff --git a/packages/bash/tool-bash/tests/integration.spec.ts b/packages/bash/tool-bash/tests/integration.spec.ts index a67809ffee..b3d6bb3f77 100644 --- a/packages/bash/tool-bash/tests/integration.spec.ts +++ b/packages/bash/tool-bash/tests/integration.spec.ts @@ -123,7 +123,10 @@ describe('bash tool through the agent loop', () => { textResponse('Background task finished.'), ]) // The second tool call needs the REAL task id from the first result; - // a tools/execute waterfall listener rewrites the scripted arguments. + // a tools/pre-execute listener rewrites the scripted arguments. (This uses + // the low-level capability to mutate `exec` before dispatch — the + // unadvertised mechanism behind a future first-class input-rewrite decision; + // here it is a test shim to thread the generated id, not a product feature.) let taskId = '' const ctx = await harness(adapter) @@ -137,7 +140,7 @@ describe('bash tool through the agent loop', () => { if (match) taskId = match[1]! } }) - ctx.on('tools/execute', async (exec, next) => { + ctx.on('tools/pre-execute', async (exec, next) => { if (exec.name === 'bash_output') { exec.arguments = { task_id: taskId } } diff --git a/packages/core/agent-loop/README.md b/packages/core/agent-loop/README.md index 4892b357bf..ed2e288304 100644 --- a/packages/core/agent-loop/README.md +++ b/packages/core/agent-loop/README.md @@ -45,10 +45,14 @@ Agents listed in config are auto-created at startup. One invocation of `runLoop()` drives one agent for its whole lifetime: ``` +create agent → emit agent/session-start(source) ⟵ once, before turn 1 forever: wait for queued messages (idle) TURN (error-contained): - drain queued → 'turn/start' → session('user/message') + 'turn/start' + each queued: waterfall agent/prompt-submit → allow (→ session('user/message'), + inject additionalContext) | block (drop) + if every prompt blocked: 'turn/end'(rejected), no step ⟵ zero-step turn STEP loop: drain steering assembly = systemPrompt.assemble() @@ -56,10 +60,14 @@ forever: stream llm.stream(request) → session('assistant/chunk') message = waterfall agent/step-result session('assistant/message') - each tool-call: session('tool/call') → tools.execute() → session('tool/result') + each tool-call: session('tool/call') + → tools.execute() [waterfall tools/pre-execute → dispatch → tools/post-execute] + → session('tool/result') + append buffered post-execute additionalContext as session('context/message')(s) drain steering → session('steering/message') - cont = waterfall agent/turn-continuation - if !cont: break + cont = waterfall agent/turn-continuation → ContinuationDecision + ({action:'continue', reason?} records reason as next-step steering) + if action==stop (and no pending steering): break session('turn/end') await session/flush re-enqueue leftover steering as queued @@ -73,9 +81,9 @@ Cancellation: `agent.cancel()` is the single public stop primitive — it clears ### What is NOT here Everything that goes beyond "call the model, run the tools, repeat" belongs to plugins listening on the event taxonomy: -- Hooks: `agent/request`, `agent/step-result`, `tools/execute`, `agent/turn-continuation` +- Hooks: `agent/session-start`, `agent/prompt-submit`, `agent/request`, `agent/step-result`, `tools/pre-execute`, `tools/post-execute`, `agent/turn-continuation` - Compaction: `agent/request` -- Sandbox, permission, plan mode: `tools/execute` +- Sandbox, permission, plan mode: `tools/pre-execute` (deny/ask gate), `tools/post-execute` - Sub-agents: TODO seam on `AgentLoop.create()` - Persistence: `session/event` + `session/flush` - UI: `agent/stream-chunk` + `agent/*` events diff --git a/packages/core/agent-loop/src/index.ts b/packages/core/agent-loop/src/index.ts index ab95ea5aac..9813dadda4 100644 --- a/packages/core/agent-loop/src/index.ts +++ b/packages/core/agent-loop/src/index.ts @@ -10,7 +10,7 @@ import { Context, Service } from 'cordis' import { randomUUID } from 'node:crypto' import z from 'schemastery' -import type { AgentFactory, AgentHandle, AgentId, AgentOptions, CreateAgentOptions, ResumeAgentOptions } from '@deepseek-ai/dsh-agent' +import type { AgentFactory, AgentHandle, AgentId, AgentOptions, CreateAgentOptions, ResumeAgentOptions, SessionStartSource } from '@deepseek-ai/dsh-agent' import type {} from '@deepseek-ai/dsh-llm' import { SessionId } from '@deepseek-ai/dsh-session' import type { Session } from '@deepseek-ai/dsh-session' @@ -129,7 +129,7 @@ export class AgentLoop extends Service implements AgentFactory { // session + agent down as one ordered chain, capturing the loop's closing // flush). The whole effect is owned by THIS fiber; no AgentHandle is needed. const session = this.ctx.sessions.prepare(SessionId(`${id}-session-${randomUUID()}`), { meta: {} }) - const { agent } = this.start(id, options, session) + const { agent } = this.start(id, options, session, 'startup') return agent } @@ -152,7 +152,9 @@ export class AgentLoop extends Service implements AgentFactory { ...options.seed !== undefined ? { seed: options.seed } : {}, meta: options.meta ?? {}, }) - return this.startOwned(options.agentId, options.agentOptions ?? {}, session) + // A seeded (forked) create is still a fresh start, NOT a resume — `resume` + // is reserved for reloading a PERSISTED session via resume()/resumeWith(). + return this.startOwned(options.agentId, options.agentOptions ?? {}, session, 'startup') } /** @@ -224,7 +226,7 @@ export class AgentLoop extends Service implements AgentFactory { ...meta.seedLength !== undefined ? { seedLength: meta.seedLength } : {}, }, }) - return this.startOwned(options.agentId, options.agentOptions ?? {}, session) + return this.startOwned(options.agentId, options.agentOptions ?? {}, session, 'resume') } /** @@ -261,14 +263,33 @@ export class AgentLoop extends Service implements AgentFactory { * so a throwing `session/created`/`agent/created` listener unwinds the * already-yielded disposers instead of leaking. * + * `source` says why the session began ({@link SessionStartSource}); it is + * emitted as `agent/session-start` once, AFTER the agent is registered (so a + * listener can resolve the agent via `ctx.agents.get(id)` and `inject()` into + * it) and BEFORE the loop starts its first turn. The emit is contained: a + * throwing session-start listener must not abort agent construction — it is + * logged, and the agent still starts. (Unlike a turn-boundary throw, there is + * no open turn here to balance; the durable evidence of a session-start hook + * is whatever it `inject()`ed.) + * * Returns the agent plus the composite effect's disposer (`disposeAgent`). */ - private start(id: AgentId, options: AgentOptions, session: Session): { agent: ReactLoopAgent; disposeAgent: () => Promise } { + private start( + id: AgentId, options: AgentOptions, session: Session, source: SessionStartSource, + ): { agent: ReactLoopAgent; disposeAgent: () => Promise } { const agent = new ReactLoopAgent(this.ctx, id, options, session) const dispose = this.ctx.effect(function* (this: AgentLoop) { yield this.ctx.sessions.enter(session) this.ctx.sessions.announce(session) yield this.ctx.agents.register(agent) + // Fire AFTER register (a listener can ctx.agents.get(id) + inject()) and + // BEFORE the loop's first turn. Contained: a throwing listener is logged, + // never aborts construction (no open turn to balance here). + try { + this.ctx.emit('agent/session-start', agent, source) + } catch (error: unknown) { + this.ctx.logger.warn(`agent "${id}": agent/session-start listener threw: ${String(error)}`) + } const stop = agent.start() // Disposed FIRST (LIFO): request loop stop (sync), then AWAIT the loop's // actual exit so its closing flush lands while onAppend (yielded above, @@ -295,8 +316,8 @@ export class AgentLoop extends Service implements AgentFactory { * `AgentHandle.dispose(): Promise` contract (mirrors the ACP `quiesce()` * helper). */ - private startOwned(id: AgentId, options: AgentOptions, session: Session): AgentHandle { - const { agent, disposeAgent } = this.start(id, options, session) + private startOwned(id: AgentId, options: AgentOptions, session: Session, source: SessionStartSource): AgentHandle { + const { agent, disposeAgent } = this.start(id, options, session, source) let disposing: Promise | undefined return { agent, dispose: () => (disposing ??= disposeAgent()) } } diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index 7ee480d570..6ac98743a2 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -10,6 +10,7 @@ import type { Context } from 'cordis' import type { FinishReason, GenerateOptions, Message } from '@deepseek-ai/dsh-llm' import { BlockAssembler, HarnessError } from '@deepseek-ai/dsh-llm' +import type { ContinuationDecision, HookContext, PromptDecision } from '@deepseek-ai/dsh-agent' import type { Session, TurnEndReason, TurnTrigger } from '@deepseek-ai/dsh-session' import { renderPrompt } from '@deepseek-ai/dsh-system-prompt' import type {} from '@deepseek-ai/dsh-tools' @@ -367,15 +368,48 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, // decides "owed" from the log via isTurnOpen, so even a throwing turn/start // listener — append pushes before notifying — still gets its turn/end). session.append('turn/start', { turn, trigger }) - // Record the queued user messages INSIDE the turn (after turn/start), so - // every event in the log is turn-enclosed. turn/end is now owed, so a throw - // while appending these is caught below and the turn is still closed. + // Each drained queued message runs the `agent/prompt-submit` waterfall before + // it becomes a `user/message` — a hook can rewrite the prompt or block it. + // Recorded INSIDE the turn (after turn/start) so every event is turn-enclosed; + // turn/end is now owed, so a throwing prompt-submit listener (the waterfall + // throws) is caught below and the turn still closes. + let anyAllowed = false + // Seeded with a floor (only observable if the batch were empty, which + // runTurn never allows — it is called with ≥1 queued message); each `block` + // decision carries a required `reason` and overwrites it, so a fully-blocked + // batch always reports the last vetoing reason. + let lastBlockReason = 'prompt blocked by hook' for (const message of queued) { - session.append('user/message', { content: message.content, source: message.source }, { surfaceOp: 'append' }) + const decision = await ctx.waterfall( + 'agent/prompt-submit', agent, message.content, message.source, + () => Promise.resolve({ kind: 'allow' }), + ) + if (decision.kind === 'block') { + lastBlockReason = decision.reason + continue + } + anyAllowed = true + // `allow.content` REPLACES the prompt bytes (a rewrite); absent keeps them. + const content = decision.content ?? message.content + session.append('user/message', { content, source: message.source }, { surfaceOp: 'append' }) + // `allow.additionalContext` is a SEPARATE context/message the next request + // also sees. The turn is open, so inject() appends it into THIS turn. + if (decision.additionalContext) { + agent.inject(decision.additionalContext.content, { source: decision.additionalContext.source }) + } } ctx.emit('agent/turn-start', agent, turn) while (true) { + // A fully-blocked batch (every prompt vetoed by prompt-submit) opens a + // zero-step turn that ends `rejected`: break BEFORE the first step so the + // boundary stays balanced (turn/start → turn/end) and the block is a + // durable in-turn fact. `anyAllowed` never changes inside the loop, so this + // only ever fires on the first iteration. + if (!anyAllowed) { + reason = { kind: 'rejected', reason: lastBlockReason } + break + } step += 1 // Steering from the previous round's continuation listeners (or @@ -448,10 +482,10 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, if (closeStep()) break - const defaultDecision = stepOutcome.hadToolCalls || steered - let shouldContinue: boolean + const defaultDecision: ContinuationDecision = { action: stepOutcome.hadToolCalls || steered ? 'continue' : 'stop' } + let decision: ContinuationDecision try { - shouldContinue = await ctx.waterfall( + decision = await ctx.waterfall( 'agent/turn-continuation', agent, turn, defaultDecision, () => Promise.resolve(defaultDecision), ) @@ -461,9 +495,18 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, break } + // A forced `continue` may carry model-facing context: record it as + // next-STEP steering (the steering channel), so the continued turn's next + // iteration drains it before its request — the typed twin of the /goal + // step/end-steer pattern. + if (decision.action === 'continue' && decision.reason) { + agent.inbox.steer({ content: decision.reason.content, source: decision.reason.source }) + } + let shouldContinue = decision.action === 'continue' + // Steering from step/end session-event or continuation listeners (the - // /goal pattern) demands the model see it — it overrides a negative - // decision; the next iteration's drain records it. + // /goal pattern) demands the model see it — it overrides a stop decision; + // the next iteration's drain records it. if (!shouldContinue && agent.inbox.hasSteering) shouldContinue = true // A cancel that landed during the continuation window — after the step's @@ -645,6 +688,12 @@ async function runStep( // ToolRegistry.execute converts tool failures (including aborts) into // isError results, so abort is re-checked around every call here. const toolCalls = message.content.filter(block => block.type === 'tool-call') + // Per-step buffer of `additionalContext` attached by tools/post-execute + // listeners. Appended as context/message(s) only AFTER every tool/result for + // the step, so a multi-call step keeps tool-call/result adjacency + // (interleaving context between a call's result and the next call's would + // break the pairing the next model request relies on). + const pendingContext: HookContext[] = [] for (const call of toolCalls) { /* v8 ignore next -- signal.reason always set: cancel()/disposal provide a default */ if (signal.aborted) throw new Error(String(signal.reason ?? 'aborted')) @@ -655,6 +704,12 @@ async function runStep( } catch { parsedArguments = call.arguments } + // TODO(pre-tool-input-rewrite): tools/pre-execute deliberately cannot rewrite + // `arguments` — tool/call (the audit record) and assistant/message (the + // model-history source) are logged BEFORE execute, and live consumers (ACP, + // tool-bash presentation) read the pre-execution args, so an execution-only + // rewrite would desync the UI from what ran. Designing that consistently is + // its own proposed RFC (docs/rfc/proposed/feature/…-pre-tool-input-rewrite.md). const result = await ctx.tools.execute({ callId: call.id, name: call.name, @@ -666,7 +721,7 @@ async function runStep( turn, step, // The correlation id MUST be the loop's authoritative call.id (the // model-transcript id that deriveMessages turns into toolCallId), NOT - // result.callId — a tools/execute waterfall listener returning a + // result.callId — a post-execute waterfall listener returning a // mismatched id would otherwise orphan the call↔result pairing in the // next model request. A listener-internal id, if ever needed, belongs in // a separate diagnostic field, never overloaded onto callId. @@ -675,6 +730,8 @@ async function runStep( isError: result.isError, ...result.error ? { error: result.error } : {}, }, { surfaceOp: 'append', sourceEventSeqs: [callEvent.seq] }) + // Buffer (don't append yet) any post-execute additionalContext for this call. + if (result.additionalContext) pendingContext.push(result.additionalContext) // signal CAN flip during the await above (abort() inside a tool); // the analyzer can't see through the await boundary. /* v8 ignore start -- signal.reason default unreachable: cancel()/disposal always set it */ @@ -683,6 +740,13 @@ async function runStep( /* v8 ignore stop */ } + // Append buffered post-execute context AFTER every tool/result, preserving + // tool-call/result adjacency across the whole batch. inject() appends into the + // open turn (a context/message at its chronological position). + for (const context of pendingContext) { + agent.inject(context.content, { source: context.source }) + } + return { hadToolCalls: toolCalls.length > 0, finish: assembler.finish } } diff --git a/packages/core/agent-loop/tests/cancel.spec.ts b/packages/core/agent-loop/tests/cancel.spec.ts index 775e08e6de..6c5b92d7d2 100644 --- a/packages/core/agent-loop/tests/cancel.spec.ts +++ b/packages/core/agent-loop/tests/cancel.spec.ts @@ -213,7 +213,7 @@ describe('Agent.cancel()', () => { if (subject === agent && !continued) { continued = true agent.cancel('from continuation') - return true // vote to continue — the post-waterfall marker check must override + return { action: 'continue' as const } // vote to continue — the post-waterfall marker check must override } return next() }) diff --git a/packages/core/agent-loop/tests/interception.spec.ts b/packages/core/agent-loop/tests/interception.spec.ts new file mode 100644 index 0000000000..33410d9c91 --- /dev/null +++ b/packages/core/agent-loop/tests/interception.spec.ts @@ -0,0 +1,446 @@ +import { describe, expect, it } from 'vitest' +import { Context } from 'cordis' +import LlmService, { CallId } from '@deepseek-ai/dsh-llm' +import SessionStore, { type SessionEvent, type TurnEndReason } from '@deepseek-ai/dsh-session' +import SystemPrompt from '@deepseek-ai/dsh-system-prompt' +import ToolRegistry, { defineTool, type PostToolDecision, type PreToolDecision } from '@deepseek-ai/dsh-tools' +import AgentRegistry, { + AgentId, + type ContinuationDecision, + type PromptDecision, + type SessionStartSource, +} from '@deepseek-ai/dsh-agent' +import AgentLoop, { type ReactLoopAgent } from '@deepseek-ai/dsh-agent-loop' +import { MockAdapter, textResponse, toolCallResponse } from './mock-adapter.ts' + +/** + * The interception seams introduced by the hooks taxonomy: `agent/prompt-submit`, + * `agent/session-start`, the reshaped `agent/turn-continuation` + * ({@link ContinuationDecision}), and the `tools/pre-execute` / `tools/post-execute` + * split with `additionalContext` buffering. These verify the canonical event + * surface a hook bridge (or a native plugin) programs against, WITHOUT any + * external protocol — a native plugin uses the typed decisions directly. + */ + +async function harness(adapter: MockAdapter) { + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + ctx.llm.registerAdapter(['mock'], adapter) + return ctx +} + +function waitForIdle(ctx: Context, agent: ReactLoopAgent): Promise { + return new Promise((resolve) => { + const dispose = ctx.on('agent/status', (subject, status) => { + if (subject === agent && status === 'idle') { + dispose() + resolve() + } + }) + }) +} + +function send(agent: ReactLoopAgent, text: string) { + agent.send([{ type: 'text', text }]) +} + +function events(agent: ReactLoopAgent): SessionEvent[] { + return [...agent.session.events] +} + +describe('agent/prompt-submit', () => { + it('allow (default via next) records the user/message unchanged', async () => { + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + const seen: string[] = [] + ctx.on('agent/prompt-submit', async (_agent, content, _source, next) => { + seen.push(content.map(b => (b.type === 'text' ? b.text : '')).join('')) + return next() + }) + + send(agent, 'hello') + await waitForIdle(ctx, agent) + + expect(seen).toEqual(['hello']) + const userMsg = events(agent).find(e => e.type === 'user/message') + expect(userMsg?.type === 'user/message' && userMsg.data.content).toEqual([{ type: 'text', text: 'hello' }]) + }) + + it('allow with content REWRITES the prompt before it is recorded', async () => { + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + ctx.on('agent/prompt-submit', async (): Promise => + ({ kind: 'allow', content: [{ type: 'text', text: 'REWRITTEN' }] })) + + send(agent, 'original') + await waitForIdle(ctx, agent) + + const userMsg = events(agent).find(e => e.type === 'user/message') + expect(userMsg?.type === 'user/message' && userMsg.data.content).toEqual([{ type: 'text', text: 'REWRITTEN' }]) + // the rewritten prompt is what reached the model + expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('REWRITTEN') + expect(JSON.stringify(adapter.requests[0]!.messages)).not.toContain('original') + }) + + it('allow with additionalContext injects a separate context/message into the turn', async () => { + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + ctx.on('agent/prompt-submit', async (): Promise => + ({ + kind: 'allow', + additionalContext: { content: [{ type: 'text', text: 'extra ctx' }], source: { kind: 'plugin', plugin: 'test' } }, + })) + + send(agent, 'go') + await waitForIdle(ctx, agent) + + const log = events(agent) + const userMsg = log.find(e => e.type === 'user/message') + const ctxMsg = log.find(e => e.type === 'context/message') + expect(userMsg).toBeDefined() + expect(ctxMsg?.type === 'context/message' && ctxMsg.data.content).toEqual([{ type: 'text', text: 'extra ctx' }]) + expect(ctxMsg?.type === 'context/message' && ctxMsg.data.source).toEqual({ kind: 'plugin', plugin: 'test' }) + // both the prompt and the injected context reach the model + const sent = JSON.stringify(adapter.requests[0]!.messages) + expect(sent).toContain('extra ctx') + }) + + it('block drops the (only) prompt → zero-step turn ends rejected, model never called', async () => { + const adapter = new MockAdapter([textResponse('should not run')]) + const ctx = await harness(adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + ctx.on('agent/prompt-submit', async (): Promise => + ({ kind: 'block', reason: 'blocked by policy' })) + + const reasons: TurnEndReason[] = [] + ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + + send(agent, 'do something') + await waitForIdle(ctx, agent) + + // the model was never called + expect(adapter.requests).toHaveLength(0) + // the turn opened and closed balanced, with no user/message and no step + const log = events(agent) + expect(log.some(e => e.type === 'turn/start')).toBe(true) + expect(log.some(e => e.type === 'turn/end')).toBe(true) + expect(log.some(e => e.type === 'user/message')).toBe(false) + expect(log.some(e => e.type === 'step/start')).toBe(false) + // ended rejected with the block reason + expect(reasons).toEqual([{ kind: 'rejected', reason: 'blocked by policy' }]) + const turnEnd = log.findLast(e => e.type === 'turn/end') + expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason).toEqual({ kind: 'rejected', reason: 'blocked by policy' }) + }) + + it('a throwing prompt-submit listener ends the turn balanced (error), loop survives', async () => { + const adapter = new MockAdapter([textResponse('after')]) + const ctx = await harness(adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + let threw = false + ctx.on('agent/prompt-submit', async () => { + if (!threw) { threw = true; throw new Error('prompt hook broke') } + return { kind: 'allow' as const } + }) + const errors: Error[] = [] + ctx.on('agent/error', (_a, _t, _s, error) => void errors.push(error)) + + send(agent, 'first') + await waitForIdle(ctx, agent) + expect(errors.map(e => e.message)).toEqual(['prompt hook broke']) + // turn balanced + const log = events(agent) + expect(log.filter(e => e.type === 'turn/start')).toHaveLength(1) + expect(log.filter(e => e.type === 'turn/end')).toHaveLength(1) + + // loop survives: a second prompt runs normally + send(agent, 'second') + await waitForIdle(ctx, agent) + expect(adapter.requests.length).toBeGreaterThanOrEqual(1) + }) +}) + +describe('agent/session-start', () => { + it('fires once with source "startup" for a fresh create, before the first turn', async () => { + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(adapter) + + const sources: SessionStartSource[] = [] + ctx.on('agent/session-start', (_agent, source) => void sources.push(source)) + + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + // fires synchronously at create, before any turn + expect(sources).toEqual(['startup']) + expect(events(agent).some(e => e.type === 'turn/start')).toBe(false) + + send(agent, 'go') + await waitForIdle(ctx, agent) + // still only one session-start + expect(sources).toEqual(['startup']) + }) + + it('a session-start listener can inject context the first request sees', async () => { + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(adapter) + + ctx.on('agent/session-start', (agent) => { + agent.inject([{ type: 'text', text: 'session preamble' }], { source: { kind: 'plugin', plugin: 'test' } }) + }) + + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + send(agent, 'go') + await waitForIdle(ctx, agent) + + // the injected context reached the model on the first (only) request + expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('session preamble') + // and is recorded with the plugin source, never mislabeled as a user prompt + const ctxMsg = events(agent).find(e => e.type === 'context/message') + expect(ctxMsg?.type === 'context/message' && ctxMsg.data.source).toEqual({ kind: 'plugin', plugin: 'test' }) + }) + + it('a throwing session-start listener does not abort agent construction', async () => { + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(adapter) + + ctx.on('agent/session-start', () => { throw new Error('session-start hook broke') }) + + // create must not throw — the listener error is contained/logged + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + expect(agent.id).toBe(AgentId('a1')) + + // and the agent still runs + send(agent, 'go') + await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(1) + }) +}) + +describe('agent/turn-continuation (ContinuationDecision)', () => { + it('a continue decision with a reason records next-step steering in the same turn', async () => { + const adapter = new MockAdapter([textResponse('step 1 no tools'), textResponse('step 2')]) + const ctx = await harness(adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + let forced = false + ctx.on('agent/turn-continuation', async (_agent, _turn, _default, next): Promise => { + if (!forced) { + forced = true + return { action: 'continue', reason: { content: [{ type: 'text', text: 'keep going on the goal' }], source: { kind: 'plugin', plugin: 'goal' } } } + } + return next() + }) + + send(agent, 'go') + await waitForIdle(ctx, agent) + + const log = events(agent) + // same turn, two steps + expect(log.filter(e => e.type === 'turn/start')).toHaveLength(1) + expect(log.filter(e => e.type === 'step/start')).toHaveLength(2) + // the reason was recorded as steering BEFORE step 2, with its plugin source + const steering = log.find(e => e.type === 'steering/message') + expect(steering?.type === 'steering/message' && steering.data.content).toEqual([{ type: 'text', text: 'keep going on the goal' }]) + expect(steering?.type === 'steering/message' && steering.data.source).toEqual({ kind: 'plugin', plugin: 'goal' }) + // and reached the next request + expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('keep going on the goal') + }) + + it('a stop decision ends the turn even when the step had tool calls', async () => { + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', { text: 'hi' })]) + const ctx = await harness(adapter) + ctx.tools.register(defineTool({ + name: 'echo', description: 'echo', parameters: { text: { type: 'string' } }, + async execute(args) { return [{ type: 'text', text: String(args.text) }] }, + })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + ctx.on('agent/turn-continuation', async (): Promise => ({ action: 'stop' })) + + send(agent, 'go') + await waitForIdle(ctx, agent) + + // default would have continued (had tool calls), but the stop decision wins + expect(adapter.requests).toHaveLength(1) + expect(events(agent).some(e => e.type === 'tool/result')).toBe(true) + }) +}) + +describe('tools/post-execute additionalContext buffering across a multi-call step', () => { + it('appends each call\'s additionalContext only AFTER all tool/results, preserving adjacency', async () => { + // One assistant step with TWO tool calls; the second model response stops. + const twoCalls = [ + { type: 'block-start' as const, index: 0, blockType: 'tool-call' as const }, + { type: 'block-end' as const, index: 0, block: { type: 'tool-call' as const, id: CallId('c1'), name: 'echo', arguments: '{"text":"a"}' } }, + { type: 'block-start' as const, index: 1, blockType: 'tool-call' as const }, + { type: 'block-end' as const, index: 1, block: { type: 'tool-call' as const, id: CallId('c2'), name: 'echo', arguments: '{"text":"b"}' } }, + { type: 'usage' as const, usage: { inputTokens: 5, outputTokens: 5 } }, + { type: 'finish' as const, reason: { kind: 'tool-calls' as const } }, + ] + const adapter = new MockAdapter([twoCalls, textResponse('done')]) + const ctx = await harness(adapter) + ctx.tools.register(defineTool({ + name: 'echo', description: 'echo', parameters: { text: { type: 'string' } }, + async execute(args) { return [{ type: 'text', text: String(args.text) }] }, + })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + // Each call attaches additionalContext naming itself. + ctx.on('tools/post-execute', async (exec, _result): Promise => + ({ kind: 'accept', additionalContext: { content: [{ type: 'text', text: `ctx-${exec.callId}` }], source: { kind: 'plugin', plugin: 'p' } } })) + + send(agent, 'go') + await waitForIdle(ctx, agent) + + // Event order in the log: both tool/results, THEN both context/messages — + // never interleaved (which would break tool-call/result adjacency). + const types = events(agent).map(e => e.type) + const firstResult = types.indexOf('tool/result') + const lastResult = types.lastIndexOf('tool/result') + const firstCtx = types.indexOf('context/message') + expect(firstResult).toBeGreaterThanOrEqual(0) + expect(lastResult).toBeGreaterThan(firstResult) // two results + expect(firstCtx).toBeGreaterThan(lastResult) // context only after ALL results + // both contexts present + const ctxTexts = events(agent) + .filter(e => e.type === 'context/message') + .flatMap(e => (e.type === 'context/message' ? e.data.content : [])) + .map(b => (b.type === 'text' ? b.text : '')) + expect(ctxTexts).toEqual(['ctx-c1', 'ctx-c2']) + }) +}) + +describe('tools/pre-execute gate (native-plugin permission pattern, end-to-end through the loop)', () => { + it('deny short-circuits dispatch into an isError result the model sees', async () => { + const adapter = new MockAdapter([toolCallResponse('c1', 'danger', {}), textResponse('ok')]) + const ctx = await harness(adapter) + let ran = false + ctx.tools.register(defineTool({ + name: 'danger', description: 'danger', parameters: {}, + async execute() { ran = true; return [{ type: 'text', text: 'should not run' }] }, + })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + ctx.on('tools/pre-execute', async (exec, next): Promise => { + if (exec.name === 'danger') return { kind: 'deny', reason: 'blocked dangerous tool' } + return next() + }) + + send(agent, 'go') + await waitForIdle(ctx, agent) + + expect(ran).toBe(false) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + expect(result?.type === 'tool/result' + && result.data.content.some(b => b.type === 'text' && b.text.includes('blocked dangerous tool'))).toBe(true) + }) +}) + +describe('worked example: a native hook plugin is just a cordis plugin on the seams', () => { + // The whole point of the interception taxonomy: a "native hook" needs no + // dsh-hook-protocol, no external command, no hook/* log — it is an ordinary + // cordis plugin subscribing to the canonical events and returning typed + // decisions. This proves all four seams compose end-to-end through the REAL + // loop, with NO hook/* SessionEvents involved (those belong to the bridge lib). + const NativeGuard = { + name: 'native-guard', + apply(ctx: Context) { + // 1. SessionStart: seed a standing instruction. + ctx.on('agent/session-start', (agent, source) => { + agent.inject( + [{ type: 'text', text: `policy active (started: ${source})` }], + { source: { kind: 'plugin', plugin: 'native-guard' } }, + ) + }) + // 2. PromptSubmit: block a forbidden prompt, annotate the rest. + ctx.on('agent/prompt-submit', async (_agent, content, _source, next): Promise => { + const text = content.map(b => (b.type === 'text' ? b.text : '')).join('') + if (text.includes('rm -rf')) return { kind: 'block', reason: 'destructive prompt blocked' } + return next() + }) + // 3. PreToolUse: deny a dangerous tool by name. + ctx.on('tools/pre-execute', async (exec, next): Promise => { + if (exec.name === 'danger') return { kind: 'deny', reason: 'danger tool denied' } + return next() + }) + // 4. PostToolUse: attach context after a tool runs. + ctx.on('tools/post-execute', async (_exec, _result, next): Promise => { + const decision = await next() + if (decision.kind === 'accept') { + return { kind: 'accept', additionalContext: { content: [{ type: 'text', text: 'audited' }], source: { kind: 'plugin', plugin: 'native-guard' } } } + } + return decision + }) + }, + } + + it('all four seams fire for a real allowed turn with a tool call', async () => { + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', { text: 'hi' }), textResponse('done')]) + const ctx = await harness(adapter) + await ctx.plugin(NativeGuard) + ctx.tools.register(defineTool({ + name: 'echo', description: 'echo', parameters: { text: { type: 'string' } }, + async execute(args) { return [{ type: 'text', text: String(args.text) }] }, + })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + send(agent, 'please echo hi') + await waitForIdle(ctx, agent) + + const log = events(agent) + // session-start preamble injected + expect(log.some(e => e.type === 'context/message' + && e.data.content.some(b => b.type === 'text' && b.text.includes('policy active (started: startup)')))).toBe(true) + // prompt allowed → user/message recorded + expect(log.some(e => e.type === 'user/message')).toBe(true) + // tool ran (echo allowed) and post-execute attached "audited" context + expect(log.some(e => e.type === 'tool/result' && !e.data.isError)).toBe(true) + expect(log.some(e => e.type === 'context/message' + && e.data.content.some(b => b.type === 'text' && b.text === 'audited'))).toBe(true) + // NO hook/* events — a native plugin needs none + expect(log.some(e => e.type.startsWith('hook/'))).toBe(false) + }) + + it('the same plugin blocks a destructive prompt → rejected turn, model never called', async () => { + const adapter = new MockAdapter([textResponse('should not run')]) + const ctx = await harness(adapter) + await ctx.plugin(NativeGuard) + const agent = ctx.agentLoop.create(AgentId('a2'), { model: 'mock' }) + + const reasons: TurnEndReason[] = [] + ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + + send(agent, 'run rm -rf /') + await waitForIdle(ctx, agent) + + expect(adapter.requests).toHaveLength(0) + expect(reasons).toEqual([{ kind: 'rejected', reason: 'destructive prompt blocked' }]) + }) + + it('HMR-safety: disposing the plugin fiber removes all four listeners', async () => { + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(adapter) + const fiber = await ctx.plugin(NativeGuard) + await fiber.dispose() + + // After disposal, a destructive prompt is NOT blocked (the listener is gone). + const agent = ctx.agentLoop.create(AgentId('a3'), { model: 'mock' }) + send(agent, 'run rm -rf /') + await waitForIdle(ctx, agent) + // the prompt ran (not rejected) — proving the prompt-submit listener was disposed + expect(adapter.requests).toHaveLength(1) + expect(events(agent).some(e => e.type === 'user/message')).toBe(true) + }) +}) diff --git a/packages/core/agent-loop/tests/loop.spec.ts b/packages/core/agent-loop/tests/loop.spec.ts index 8d8224ad5f..9377b161ca 100644 --- a/packages/core/agent-loop/tests/loop.spec.ts +++ b/packages/core/agent-loop/tests/loop.spec.ts @@ -277,7 +277,7 @@ describe('agent loop', () => { let steps = 0 ctx.on('session/event', (_session, event) => { if (event.type === 'step/end') steps++ }) ctx.on('agent/turn-continuation', async (_agent, _turn, _defaultDecision, next) => { - if (steps < 3) return true + if (steps < 3) return { action: 'continue' as const } return next() }) @@ -300,7 +300,7 @@ describe('agent loop', () => { })) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - ctx.on('agent/turn-continuation', async () => false as const) + ctx.on('agent/turn-continuation', async () => ({ action: 'stop' }) as const) send(agent, 'go') await waitForIdle(ctx, agent) @@ -381,7 +381,7 @@ describe('agent loop', () => { // Force exactly one continuation (step 1 → step 2), then defer to default // (step 2 is a plain stop with no tool calls → stops). ctx.on('agent/turn-continuation', async (_agent, _turn, _defaultDecision, next) => { - if (steps < 2) return true + if (steps < 2) return { action: 'continue' as const } return next() }) diff --git a/packages/core/agent-loop/tests/resume.spec.ts b/packages/core/agent-loop/tests/resume.spec.ts index 074e84d78a..805f61d392 100644 --- a/packages/core/agent-loop/tests/resume.spec.ts +++ b/packages/core/agent-loop/tests/resume.spec.ts @@ -94,6 +94,36 @@ describe('the session-persistence RFC: AgentLoop factory create/resume', () => { await ctx2.fiber.dispose() }) + it('agent/session-start fires "startup" for createAgent and "resume" for resume()', async () => { + // Lifecycle 1: a fresh createAgent emits session-start with source 'startup'. + const adapter1 = new MockAdapter([textResponse('a')]) + const { ctx: ctx1, root } = await persistentHarness(adapter1) + const sources1: string[] = [] + ctx1.on('agent/session-start', (_agent, source) => void sources1.push(source)) + const a1 = ctx1.agents.create({ agentId: AgentId('s'), sessionId: SessionId('start-sess') }).agent as ReactLoopAgent + expect(sources1).toEqual(['startup']) + a1.send([{ type: 'text', text: 'q' }], { source: { kind: 'user' } }) + await waitForIdle(ctx1, a1) + await ctx1.fiber.dispose() + + // Lifecycle 2: resuming the persisted session emits session-start 'resume'. + const adapter2 = new MockAdapter([textResponse('b')]) + const ctx2 = new Context() + await ctx2.plugin(LlmService) + await ctx2.plugin(SessionStore) + await ctx2.plugin(SystemPrompt) + await ctx2.plugin(ToolRegistry) + await ctx2.plugin(AgentRegistry) + await ctx2.plugin(AgentLoop, { agents: [] }) + await ctx2.plugin(SessionPersistenceJsonl, { root }) + ctx2.llm.registerAdapter(['mock'], adapter2) + const sources2: string[] = [] + ctx2.on('agent/session-start', (_agent, source) => void sources2.push(source)) + await ctx2.agents.resume({ agentId: AgentId('s'), resumeSessionId: SessionId('start-sess') }) + expect(sources2).toEqual(['resume']) + await ctx2.fiber.dispose() + }) + it('resume of a forked session preserves the parentSession lineage and seed boundary in the header', async () => { // Lifecycle 1: persist a FORKED session (carries parentSession + seedLength // in its header) by creating it with a complete-turn seed — the write path diff --git a/packages/core/agent-loop/tests/review-fixes.spec.ts b/packages/core/agent-loop/tests/review-fixes.spec.ts index ab421aaa2e..434ad31fcb 100644 --- a/packages/core/agent-loop/tests/review-fixes.spec.ts +++ b/packages/core/agent-loop/tests/review-fixes.spec.ts @@ -4,7 +4,7 @@ import LlmService, { CallId, MessageSource, StreamChunk } from '@deepseek-ai/dsh import SessionStore, { Session, SessionEvent, SessionId, TurnEndReason } from '@deepseek-ai/dsh-session' import SystemPrompt from '@deepseek-ai/dsh-system-prompt' import ToolRegistry, { defineTool } from '@deepseek-ai/dsh-tools' -import AgentRegistry, { AgentId } from '@deepseek-ai/dsh-agent' +import AgentRegistry, { AgentId, type ContinuationDecision } from '@deepseek-ai/dsh-agent' import AgentLoop, { ReactLoopAgent } from '@deepseek-ai/dsh-agent-loop' import * as Invariants from '@deepseek-ai/dsh-invariants' import { MockAdapter, textResponse, toolCallResponse } from './mock-adapter.ts' @@ -271,12 +271,12 @@ describe('HIGH: plugin exceptions are contained', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) let threwOnce = false - ctx.on('agent/turn-continuation', async (): Promise => { + ctx.on('agent/turn-continuation', async (): Promise => { if (!threwOnce) { threwOnce = true throw new Error('broken continuation plugin') } - return false + return { action: 'stop' } }) const errors: Error[] = [] @@ -1005,7 +1005,7 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar }) describe('P1-7: tool/result is logged under the originating call.id, not result.callId', () => { - it('a tools/execute listener returning a mismatched callId cannot orphan the call↔result pairing', async () => { + it('the loop records tool/result under the model call.id even when a post-execute listener replaces content', async () => { // Model emits a tool-call with id "c1", then a final text turn. const adapter = new MockAdapter([ toolCallResponse('c1', 'echo', { x: 1 }), @@ -1019,12 +1019,13 @@ describe('P1-7: tool/result is logged under the originating call.id, not result. async execute() { return [{ type: 'text', text: 'ok' }] }, })) - // A waterfall listener short-circuits with a result carrying the WRONG - // callId (a listener-internal/proxy id). The loop must still record the - // tool/result under the model's authoritative call.id. - ctx.on('tools/execute', (exec) => { + // A post-execute listener transforms the result (accept-with-replacement). + // The loop must still record the tool/result under the model's authoritative + // call.id (the loop ignores result.callId — which the registry always sets to + // exec.callId anyway — and uses call.id, the model-transcript id). + ctx.on('tools/post-execute', (exec, _result) => { expect(exec.callId).toBe(CallId('c1')) // the loop passed the real id in - return Promise.resolve({ callId: CallId('wrong-proxy-id'), content: [{ type: 'text', text: 'ok' }], isError: false }) + return Promise.resolve({ kind: 'accept', content: [{ type: 'text', text: 'ok' }] }) }, { prepend: true }) const agent = ctx.agentLoop.create(AgentId('a-callid'), { model: 'mock' }) diff --git a/packages/core/agent/README.md b/packages/core/agent/README.md index 1d1b839da3..c66038ff43 100644 --- a/packages/core/agent/README.md +++ b/packages/core/agent/README.md @@ -31,6 +31,7 @@ The full `agent/*` event taxonomy is declared via declaration merging in `dsh-ag - `agent/created`, `agent/disposed` — registration/deregistration - `agent/status` — idle / running / disposed transition - `agent/queued` — message entered inbox (source-resolved, steering flag) +- `agent/session-start` — the session lifecycle began (once, before turn 1), carrying a `SessionStartSource` (`startup` for a fresh or forked create, `resume` for a reloaded persisted session; `clear`/`compact` reserved). A pure notification — it cannot block startup; a listener seeds context via `agent.inject()` (a `context/message` the first request sees). #### Turn boundaries (emit) @@ -40,9 +41,14 @@ Step boundaries are NOT mirrored as `agent/*` emits: a consumer that needs per-s #### Interception seams (waterfall) +Each interception waterfall returns a small, seam-specific typed **Decision** union (the unified idiom across the taxonomy — a CC/Codex bridge maps its `permissionDecision`/`decision`/`continue` fields onto these, a native plugin returns them directly): + +- `agent/prompt-submit` — decide what happens to one drained queued message before it becomes a `user/message`: `PromptDecision` = `allow` (optionally rewriting the prompt `content` or attaching `additionalContext`) or `block` (drop it; a batch whose every prompt is blocked opens a zero-step turn that ends `rejected`). Maps onto Claude Code's `UserPromptSubmit`. - `agent/request` — mutate `GenerateOptions` before the model call (hooks, compaction, model switching, tool filtering) - `agent/step-result` — post-process the assembled assistant message before tool dispatch (validates what the log records) -- `agent/turn-continuation` — override the continue/stop decision (force-continue /loop, force-stop budget guard) +- `agent/turn-continuation` — override the continue/stop decision via `ContinuationDecision` = `{action:'stop'}` or `{action:'continue', reason?}` (a `continue` `reason` is recorded as next-step steering in the same turn — the typed `/goal` pattern). Force-continue `/loop`, force-stop budget guard. + +Tool interception is the `tools/pre-execute` / `tools/post-execute` pair in [`dsh-tools`](../tools/README.md) (`PreToolDecision` allow/deny/ask, `PostToolDecision` accept/block) — same typed-Decision idiom, owned there because it is the tool registry's seam. #### Streaming + tool (emit) diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts index 6c3f2b8226..cdc0fce538 100644 --- a/packages/core/agent/src/types.ts +++ b/packages/core/agent/src/types.ts @@ -34,6 +34,11 @@ * See `docs/rfc/implemented/architecture/2026-06-11-microkernel-event-taxonomy.md` * and the related `docs/rfc/proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md`. * + * The interception waterfalls here (`agent/prompt-submit`, `agent/request`, + * `agent/step-result`, `agent/turn-continuation`) each return a typed Decision — + * the convention pinned by + * `docs/rfc/implemented/feature/2026-06-30-interception-seams.md`. + * * @module @deepseek-ai/dsh-agent/types */ @@ -66,6 +71,64 @@ export interface SendOptions { export type AgentStatus = 'idle' | 'running' | 'disposed' +/** + * Model-facing context an interception listener wants the agent to SEE on the + * next request — the canonical shape behind every "inject extra context" + * decision ({@link PromptDecision}, {@link PostToolDecision}, + * {@link ContinuationDecision}). It is `agent.inject()`ed as a + * `context/message`, so it carries a REQUIRED {@link MessageSource}: `inject()` + * defaults a missing source to `{kind:'user'}`, which would MISLABEL plugin + * context as a user prompt and corrupt derived history. A bridge sets + * `{kind:'plugin', plugin:'…'}`; a native plugin names itself. Required, not + * optional — the label is load-bearing, never defaulted here. + */ +export interface HookContext { + content: ContentBlock[] + source: MessageSource +} + +/** + * The decision an {@link Agent} `agent/prompt-submit` waterfall listener returns + * for ONE drained queued message, before it becomes a `user/message`. Maps onto + * the Claude Code `UserPromptSubmit` hook's allow/block + `additionalContext`. + * + * - `allow` proceeds with the prompt; optional `content` REPLACES the prompt + * bytes (a rewrite), and optional `additionalContext` is `inject()`ed as a + * separate `context/message` the next request also sees. + * - `block` drops the prompt entirely; `reason` is the durable record of why. + * A batch whose every prompt is blocked still opens a zero-step turn that ends + * with {@link TurnEndReason} `rejected` (so the boundary stays balanced and a + * UI can render "blocked by hook"). + */ +export type PromptDecision = + | { kind: 'allow'; content?: ContentBlock[]; additionalContext?: HookContext } + | { kind: 'block'; reason: string } + +/** + * The decision an {@link Agent} `agent/turn-continuation` waterfall listener + * returns. The loop computes the default (`continue` when the step had tool + * calls or steering was injected, else `stop`); listeners override it to + * force-continue (`/goal`, `/loop`) or force-stop (budget guards). + * + * A `continue` may carry a `reason`: model-facing context recorded as next-STEP + * steering within the SAME turn (the loop enqueues it through the steering + * channel, so the continued turn's next step sees it). This is the typed twin of + * the existing "steer from a step/end listener" `/goal` pattern. + */ +export type ContinuationDecision = + | { action: 'stop' } + | { action: 'continue'; reason?: HookContext } + +/** + * Why an agent's session lifecycle began, carried by `agent/session-start`. A + * bridge keys its SessionStart hook's matcher on this (Claude Code's + * `startup`/`resume`/`clear`/`compact` source set). `startup` = a fresh create + * (including a seeded/forked create — a seed is NOT a resume); `resume` = a + * persisted session reloaded via `ctx.agents.resume()`. `clear`/`compact` are + * driven by those subsystems (compact = `TODO(compaction)`). + */ +export type SessionStartSource = 'startup' | 'resume' | 'clear' | 'compact' + /** * The agent handle — the surface every plugin (UI, hooks, orchestrators) * programs against. The concrete implementation lives in @@ -183,6 +246,19 @@ declare module 'cordis' { */ 'agent/queued'(agent: Agent, content: ContentBlock[], info: { source: MessageSource; steering: boolean }): void + // ---- session lifecycle (emit) ---- + /** + * The agent's session lifecycle began, fired once before its first turn. + * `source` says why ({@link SessionStartSource}: fresh startup, a resumed + * persisted session, …). A pure NOTIFICATION (emit, not waterfall): it + * carries no veto — a session-start listener that wants to seed context does + * so via `agent.inject()` (a `context/message` the first request sees), not + * by returning a decision. Cannot block the session from starting; that gap + * is deliberate (a bridge logs/injects, it does not gate startup). + * @mode emit + */ + 'agent/session-start'(agent: Agent, source: SessionStartSource): void + // ---- turn boundaries (emit) — the live boundary surface ---- // Step boundaries are NOT mirrored here: a consumer that needs per-step // boundaries reads the durable `step/start`/`step/end` session events (the @@ -205,6 +281,16 @@ declare module 'cordis' { 'agent/turn-end'(agent: Agent, turn: number, reason: TurnEndReason): void // ---- interception seams (waterfall) ---- + /** + * Waterfall: decide what happens to ONE drained queued message before it + * becomes a `user/message` — allow (optionally rewriting the prompt bytes or + * attaching `additionalContext`) or block it. Fires inside the already-open + * turn, per drained message. Maps onto Claude Code's `UserPromptSubmit` hook. + * Call `next()` to delegate to the default (allow unchanged), or return a + * {@link PromptDecision} without calling `next()` to short-circuit. + * @mode waterfall + */ + 'agent/prompt-submit'(agent: Agent, content: ContentBlock[], source: MessageSource, next: () => Promise): Promise /** * Waterfall: mutate the fully-assembled {@link GenerateOptions} before the * model call (hooks, compaction, model switching, tool filtering, …). Call @@ -219,12 +305,15 @@ declare module 'cordis' { */ 'agent/step-result'(agent: Agent, turn: number, step: number, message: Message, next: () => Promise): Promise /** - * Waterfall: override the turn-continuation decision. The default - * (computed by the loop) is `hadToolCalls || steeringInjected`. Listeners - * can force-continue (/goal, /loop) or force-stop (budget guards). + * Waterfall: override the turn-continuation decision via a typed + * {@link ContinuationDecision}. The loop's `defaultDecision` is `continue` + * when the step had tool calls or steering was injected, else `stop`. + * Listeners force-continue (`/goal`, `/loop` — optionally attaching a + * `reason` recorded as next-step steering) or force-stop (budget guards). + * Call `next()` to delegate to the default, or return a decision to override. * @mode waterfall */ - 'agent/turn-continuation'(agent: Agent, turn: number, defaultDecision: boolean, next: () => Promise): Promise + 'agent/turn-continuation'(agent: Agent, turn: number, defaultDecision: ContinuationDecision, next: () => Promise): Promise // ---- streaming + tool notifications (emit) ---- /** diff --git a/packages/core/session/src/types.ts b/packages/core/session/src/types.ts index 581fc29df1..a4ba452193 100644 --- a/packages/core/session/src/types.ts +++ b/packages/core/session/src/types.ts @@ -134,6 +134,16 @@ export interface TurnEndReasonMap { error: { kind: 'error'; step: number; message: string; code?: string } disposed: { kind: 'disposed' } 'max-tokens': { kind: 'max-tokens' } + /** + * The turn's entire prompt batch was BLOCKED before any step ran — every + * drained queued message was vetoed by an `agent/prompt-submit` listener (a + * hook). The turn still opened (so the boundary stays balanced and the block + * is a durable in-turn fact), but ran zero steps. `reason` carries the block + * message from the vetoing decision. Distinct from `aborted` (a user-driven + * cancel) and `error` (a failure): the prompt was rejected by policy, not + * interrupted or broken. A UI renders it as "prompt blocked by hook". + */ + rejected: { kind: 'rejected'; reason: string } /** * The turn never ended on its own: the process crashed mid-turn and a * persistence backend later closed the orphaned (open) turn on reload so the diff --git a/packages/core/tools/README.md b/packages/core/tools/README.md index 6b1634cd70..e81a0fb007 100644 --- a/packages/core/tools/README.md +++ b/packages/core/tools/README.md @@ -1,6 +1,6 @@ # dsh-tools -Tool registry and execution waterfall. Tool plugins register their schemas and executors; the agent loop executes calls through the `tools/execute` waterfall. +Tool registry and execution pipeline. Tool plugins register their schemas and executors; the agent loop executes each call through `tools/pre-execute` (the allow/deny gate) → core dispatch → `tools/post-execute` (inspect/replace the result, attach context). ## Service: `ToolRegistry` (ctx key: `tools`) @@ -9,7 +9,7 @@ Tool registry and execution waterfall. Tool plugins register their schemas and e - `ctx.tools.register(definition: ToolDefinition): () => void` Register a tool. Disposed with the calling fiber. - `ctx.tools.get(name: string): ToolDefinition | undefined` - `ctx.tools.schemas(): ToolSchema[]` Schemas of all registered tools (without the `execute` functions). -- `ctx.tools.execute(exec: ToolExecution): Promise` Execute one tool call through the `tools/execute` waterfall. +- `ctx.tools.execute(exec: ToolExecution): Promise` Execute one tool call through the `tools/pre-execute` → dispatch → `tools/post-execute` pipeline. ### Injected services @@ -19,20 +19,23 @@ Tool registry and execution waterfall. Tool plugins register their schemas and e | Event | Mode | Purpose | |---|---|---| -| `tools/execute` | waterfall | Wrap/veto tool execution (sandbox, permission, hooks, plan mode) | +| `tools/pre-execute` | waterfall | Allow/deny gate BEFORE a tool runs (sandbox, permission, hooks); returns `PreToolDecision` | +| `tools/post-execute` | waterfall | Inspect/replace the result AFTER a tool runs, attach context; returns `PostToolDecision` | | `tools/change` | emit | A tool was registered or unregistered | ### Key types - `ToolDefinition` — `ToolSchema` + `execute(args, exec): Promise`, plus optional `presentCall(args)` / `presentResult(args, result)` for tool-owned UI presentation (see below). - `ToolExecution` — one pending tool call: `{ callId, name, arguments, agent?, signal? }`. -- `ToolExecutionResult` — outcome: `{ callId, content, isError, error? }`. On failure with a `HarnessError`, `error: { name, code }` carries the structured failure class alongside the model-facing text (the loop forwards it onto the `tool/result` session event for retry/sandbox plugins and replay). +- `ToolExecutionResult` — outcome: `{ callId, content, isError, error?, additionalContext? }`. On failure with a `HarnessError`, `error: { name, code }` carries the structured failure class alongside the model-facing text (the loop forwards it onto the `tool/result` session event for retry/sandbox plugins and replay). `additionalContext` (a `HookContext`) ferries any `tools/post-execute` context up to the loop, which buffers it and appends it as a `context/message` after all `tool/result`s in the step. +- `PreToolDecision` — `{kind:'allow'}` | `{kind:'deny', reason}` | `{kind:'ask', reason?}`. Input rewrite (changing `arguments`) is deliberately NOT offered (it would desync the pre-execution audit/history/UI from what ran — its own proposed RFC); `ask` degrades to `deny` until the permission system lands. +- `PostToolDecision` — `{kind:'accept', content?, additionalContext?}` (keep the call successful, optionally replacing the model-facing content) | `{kind:'block', feedback, additionalContext?}` (turn it into an `isError` whose content is the corrective feedback). Output replacement is clean because `tool/result` is logged AFTER `execute()` returns. - `ToolCallPresentation` / `ToolResultPresentation` — provider-neutral shapes a tool returns from `presentCall` / `presentResult` to own how a UI renders ITS calls (see "Tool-owned UI presentation"). ### Extension points - Tool plugins call `ctx.tools.register()` — schemas flow into the assembly automatically. -- The `tools/execute` waterfall is the single seam for sandbox, permission, hooks, and plan-mode plugins to wrap or veto a call. Listeners receive `(exec, next)`: call `next()` to proceed, or return a result without calling `next()` to short-circuit (veto). +- `tools/pre-execute` is the allow/deny gate (sandbox, permission, hooks): listeners receive `(exec, next)` and call `next()` to delegate to the default (allow) or return a `PreToolDecision` to short-circuit; a `deny`/`ask` skips dispatch and yields an `isError` result. `tools/post-execute` is the inspect/transform seam: `(exec, result, next)` → a `PostToolDecision` that can replace content, block with feedback, or attach `additionalContext`. Core dispatch sits between them as plain code; the tool body keeps its own try/catch so a thrown tool still reaches `post-execute` as an `isError`. Both follow the typed-Decision idiom shared with the `agent/*` interception seams (see [`dsh-agent`](../agent/README.md)). - MCP servers: one plugin per server, discover tools, call `ctx.tools.register()` with the server's schemas. ### Typed tool parameter schemas diff --git a/packages/core/tools/src/index.ts b/packages/core/tools/src/index.ts index 5a17aa2b0c..25f57ed400 100644 --- a/packages/core/tools/src/index.ts +++ b/packages/core/tools/src/index.ts @@ -1,8 +1,9 @@ /** - * Tool registry and execution waterfall. Plugins register tools; the registry + * Tool registry and execution pipeline. Plugins register tools; the registry * feeds schemas into the system prompt, and `execute()` dispatches each call - * through the `tools/execute` waterfall for sandbox, permission, and hook - * plugins to wrap or veto. + * through `tools/pre-execute` (the allow/deny gate) → core dispatch → + * `tools/post-execute` (inspect/replace the result, attach context) for + * sandbox, permission, and hook plugins to gate or transform a call. * * @module @deepseek-ai/dsh-tools */ @@ -10,7 +11,7 @@ import { Context, Service } from 'cordis' import type { CallId, ContentBlock, ToolSchema } from '@deepseek-ai/dsh-llm' import { HarnessError } from '@deepseek-ai/dsh-llm' -import type { Agent } from '@deepseek-ai/dsh-agent' +import type { Agent, HookContext } from '@deepseek-ai/dsh-agent' import type {} from '@deepseek-ai/dsh-system-prompt' export { @@ -33,14 +34,31 @@ declare module 'cordis' { interface Events { /** - * Waterfall around every tool execution — the single seam where sandbox, - * permission, hook, and plan-mode plugins wrap or veto a call. Listeners - * receive `(exec, next)`: call `next()` to proceed (possibly around your - * own logic), or return a {@link ToolExecutionResult} without calling - * `next()` to short-circuit (veto). + * Waterfall BEFORE a tool runs — the gate where sandbox, permission, and + * hook plugins allow or deny a call (Claude Code's `PreToolUse`). Listeners + * receive `(exec, next)`: call `next()` to delegate to the default (allow), + * or return a {@link PreToolDecision} without calling `next()` to + * short-circuit. A `deny` skips dispatch and yields an `isError` result; the + * tool body never runs. Input rewrite is deliberately NOT offered here (see + * {@link PreToolDecision}); `ask` degrades to deny until the permission + * system lands (`FIXME(permissions)`). * @mode waterfall */ - 'tools/execute'(this: ToolRegistry, exec: ToolExecution, next: () => Promise): Promise + 'tools/pre-execute'(this: ToolRegistry, exec: ToolExecution, next: () => Promise): Promise + /** + * Waterfall AFTER a tool runs — where hook plugins inspect the result and + * accept it (optionally REPLACING the model-facing content, and/or attaching + * `additionalContext` for the next request) or block it with corrective + * `feedback` (Claude Code's `PostToolUse`). Listeners receive + * `(exec, result, next)`: call `next()` to delegate to the default (accept + * unchanged), or return a {@link PostToolDecision} to override. The core tool + * dispatch sits between the two waterfalls as plain code, all inside + * `execute`'s outer try/catch (and the tool body keeps its own inner + * try/catch, so a thrown tool still reaches `post-execute` as an `isError` + * result). + * @mode waterfall + */ + 'tools/post-execute'(this: ToolRegistry, exec: ToolExecution, result: ToolExecutionResult, next: () => Promise): Promise /** * A tool was registered or unregistered (the available tool set changed). * @mode emit @@ -247,8 +265,54 @@ export interface ToolExecutionResult { * text in `content` is always present; this is extra structure for code. */ error?: ToolErrorInfo + /** + * Extra model-facing context a `tools/post-execute` listener attached for the + * NEXT request (Claude Code's PostToolUse `additionalContext`). It is NOT part + * of this call's `content` — `content`/`feedback` shape the tool RESULT, but + * `additionalContext` is a SEPARATE `context/message`. A step can carry + * multiple tool calls, so the loop BUFFERS every call's `additionalContext` + * and appends them only AFTER all `tool/result`s for the step, keeping + * tool-call/result adjacency intact. Carried on the result purely to ferry it + * from `execute()` up to the loop's per-step buffer. + */ + additionalContext?: HookContext } +/** + * The decision a `tools/pre-execute` listener returns for one pending call. + * Maps onto Claude Code's `PreToolUse` `permissionDecision`. + * + * - `allow` proceeds to dispatch. (Input rewrite — changing `exec.arguments` — + * is deliberately NOT offered: `tool/call` and `assistant/message` are logged + * BEFORE execution and live consumers, e.g. the ACP bridge and `dsh-tool-bash` + * presentation, read the pre-execution arguments, so an execution-only rewrite + * would desync the UI from what RAN. That consistency redesign is its own + * `proposed` RFC; `TODO(pre-tool-input-rewrite)` anchors it at the call site.) + * - `deny` skips dispatch; the loop records an `isError` result carrying `reason`. + * - `ask` is the permission-prompt intent; until the permission system exists it + * degrades to `deny` (`FIXME(permissions)`). + */ +export type PreToolDecision = + | { kind: 'allow' } + | { kind: 'deny'; reason: string } + | { kind: 'ask'; reason?: string } + +/** + * The decision a `tools/post-execute` listener returns for one finished call. + * Maps onto Claude Code's `PostToolUse` decision. + * + * - `accept` keeps the call successful; optional `content` REPLACES the + * model-facing result (clean: `tool/result` is logged AFTER `execute()` + * returns, so a replaced result is the single source of truth for both derived + * history and UI). Optional `additionalContext` rides to the next request. + * - `block` turns the call into an `isError` result whose content is the + * corrective `feedback` (the model is told the call was rejected and why), + * optionally also attaching `additionalContext`. + */ +export type PostToolDecision = + | { kind: 'accept'; content?: ContentBlock[]; additionalContext?: HookContext } + | { kind: 'block'; feedback: ContentBlock[]; additionalContext?: HookContext } + /** * Best-effort human-readable message from an arbitrary thrown value: Error * instances use `.message`; non-Error objects with a string `message` @@ -336,31 +400,90 @@ export class ToolRegistry extends Service { } /** - * Execute one tool call through the `tools/execute` waterfall. If the tool is - * not registered, the result is an `isError` carrying a `UNKNOWN_TOOL` - * structured error. If the tool or a waterfall listener throws, the error is - * caught and returned as an `isError` result so the loop records a failed tool - * call instead of failing the whole turn; a thrown {@link HarnessError} + * Execute one tool call through the `tools/pre-execute` → dispatch → + * `tools/post-execute` pipeline. The two waterfalls are the gate (allow/deny) + * and the inspect/transform seam; core dispatch sits between them as plain + * code. The whole thing is wrapped in one outer try/catch so a throwing + * listener (in either waterfall) becomes an `isError` result instead of + * failing the turn; the tool body ALSO keeps its own inner try/catch, so a + * thrown tool becomes an `isError` result that `post-execute` listeners can + * still inspect. If the tool is not registered, the result is an `isError` + * carrying a `UNKNOWN_TOOL` structured error. A thrown {@link HarnessError} * surfaces its `{ name, code }` on the result. */ async execute(exec: ToolExecution): Promise { try { - return await this.ctx.waterfall(this, 'tools/execute', exec, async (): Promise => { - try { - const tool = this.store.get(exec.name) - // Unknown tool routes through the same catch as a tool-thrown error, so - // both failure classes get structured `{ name, code }` from one path. - if (!tool) throw new ToolNotFoundError(exec.name) - const content = await tool.execute(exec.arguments, exec) - return { callId: exec.callId, content, isError: false } - } catch (error: unknown) { - return toolErrorResult(exec.callId, error) + // --- Gate: tools/pre-execute. A deny (or an ask, which degrades to deny + // until the permission system lands) skips dispatch entirely. --- + const decision = await this.ctx.waterfall( + this, 'tools/pre-execute', exec, + () => Promise.resolve({ kind: 'allow' }), + ) + if (decision.kind !== 'allow') { + // deny → isError. ask has no permission UI yet, so degrade to deny + // (FIXME(permissions)): a forthcoming permission system turns `ask` into + // a real prompt; today it is the conservative "not allowed". + const reason = decision.kind === 'deny' + ? decision.reason + : decision.reason ?? `tool "${exec.name}" requires approval (not yet supported)` + const denied: ToolExecutionResult = { + callId: exec.callId, + content: [{ type: 'text', text: `Error: ${reason}` }], + isError: true, } - }) + return await this.postExecute(exec, denied) + } + + // --- Core dispatch (plain code between the waterfalls). The tool body's + // own try/catch turns a throw into an isError result so post-execute can + // inspect it; an unknown tool routes through the same catch. --- + let result: ToolExecutionResult + try { + const tool = this.store.get(exec.name) + if (!tool) throw new ToolNotFoundError(exec.name) + const content = await tool.execute(exec.arguments, exec) + result = { callId: exec.callId, content, isError: false } + } catch (error: unknown) { + result = toolErrorResult(exec.callId, error) + } + + return await this.postExecute(exec, result) } catch (error: unknown) { + // Outer backstop: a throwing pre/post-execute listener (or the waterfall + // machinery) becomes an isError result, never a turn failure. return toolErrorResult(exec.callId, error) } } + + /** + * Run the `tools/post-execute` waterfall over a dispatched `result` and apply + * its {@link PostToolDecision}: `accept` keeps the call successful (replacing + * `content` when given), `block` turns it into an `isError` whose content is + * the corrective `feedback`. Either decision may attach `additionalContext`, + * which is ferried on the returned result for the loop's per-step buffer. + * Runs inside `execute`'s outer try/catch (a throwing listener → isError). + */ + private async postExecute(exec: ToolExecution, result: ToolExecutionResult): Promise { + const decision = await this.ctx.waterfall( + this, 'tools/post-execute', exec, result, + () => Promise.resolve({ kind: 'accept' }), + ) + const additionalContext = decision.additionalContext + if (decision.kind === 'block') { + return { + callId: result.callId, + content: decision.feedback, + isError: true, + ...additionalContext ? { additionalContext } : {}, + } + } + // accept: replace content if supplied, preserve the dispatched isError/error. + return { + ...result, + ...decision.content ? { content: decision.content } : {}, + ...additionalContext ? { additionalContext } : {}, + } + } } function toolErrorResult(callId: ToolExecution['callId'], error: unknown): ToolExecutionResult { diff --git a/packages/core/tools/tests/tools.spec.ts b/packages/core/tools/tests/tools.spec.ts index c88963ecc1..e67650ec95 100644 --- a/packages/core/tools/tests/tools.spec.ts +++ b/packages/core/tools/tests/tools.spec.ts @@ -4,7 +4,7 @@ import { CallId, HarnessError } from '@deepseek-ai/dsh-llm' import SystemPrompt from '@deepseek-ai/dsh-system-prompt' import ToolRegistry, { defineTool, schemaSpecToJsonSchema, validateArgs, ToolArgsError, ToolNotFoundError, - type InferArgs, type SchemaSpec, type ToolExecutionResult, + type InferArgs, type SchemaSpec, type PreToolDecision, type PostToolDecision, } from '@deepseek-ai/dsh-tools' async function setup() { @@ -112,53 +112,123 @@ describe('ToolRegistry', () => { expect(err.message).toBe('unknown tool "ghost"') }) - it('lets tools/execute waterfall listeners veto a call (permission pattern)', async () => { + it('lets a tools/pre-execute listener deny a call (permission pattern)', async () => { const ctx = await setup() ctx.tools.register(echoTool) - ctx.on('tools/execute', async (exec, next): Promise => { - if (exec.name === 'echo') { - return { - callId: exec.callId, - content: [{ type: 'text', text: 'denied by policy' }], - isError: true, - } - } + ctx.on('tools/pre-execute', async (exec, next): Promise => { + if (exec.name === 'echo') return { kind: 'deny', reason: 'denied by policy' } return next() }) const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) expect(result.isError).toBe(true) - expect(result.content[0]).toMatchObject({ text: 'denied by policy' }) + expect(result.content[0]).toMatchObject({ text: 'Error: denied by policy' }) }) - it('composes multiple tools/execute listeners (sandbox-wrap pattern)', async () => { + it('an ask decision degrades to deny until the permission system lands', async () => { + const ctx = await setup() + ctx.tools.register(echoTool) + + ctx.on('tools/pre-execute', async (_exec, _next): Promise => + ({ kind: 'ask', reason: 'needs approval' })) + + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) + expect(result.isError).toBe(true) + expect(result.content[0]).toMatchObject({ text: 'Error: needs approval' }) + }) + + it('an ask decision with no reason degrades to deny with a default message', async () => { + const ctx = await setup() + ctx.tools.register(echoTool) + + ctx.on('tools/pre-execute', async (_exec, _next): Promise => ({ kind: 'ask' })) + + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) + expect(result.isError).toBe(true) + expect(result.content[0]).toMatchObject({ text: 'Error: tool "echo" requires approval (not yet supported)' }) + }) + + it('a tools/post-execute listener can replace the result content (accept) ', async () => { + const ctx = await setup() + ctx.tools.register(echoTool) + + ctx.on('tools/post-execute', async (_exec, _result, _next): Promise => + ({ kind: 'accept', content: [{ type: 'text', text: 'rewritten' }] })) + + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) + expect(result.isError).toBe(false) + expect(result.content[0]).toMatchObject({ text: 'rewritten' }) + }) + + it('a tools/post-execute block turns the call into an isError with corrective feedback', async () => { + const ctx = await setup() + ctx.tools.register(echoTool) + + ctx.on('tools/post-execute', async (_exec, _result, _next): Promise => + ({ kind: 'block', feedback: [{ type: 'text', text: 'output rejected: try again' }] })) + + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) + expect(result.isError).toBe(true) + expect(result.content[0]).toMatchObject({ text: 'output rejected: try again' }) + }) + + it('a block decision can ALSO attach additionalContext', async () => { + const ctx = await setup() + ctx.tools.register(echoTool) + + ctx.on('tools/post-execute', async (_exec, _result, _next): Promise => + ({ + kind: 'block', + feedback: [{ type: 'text', text: 'rejected' }], + additionalContext: { content: [{ type: 'text', text: 'why it was rejected' }], source: { kind: 'plugin', plugin: 'test' } }, + })) + + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) + expect(result.isError).toBe(true) + expect(result.content[0]).toMatchObject({ text: 'rejected' }) + expect(result.additionalContext).toMatchObject({ content: [{ text: 'why it was rejected' }], source: { kind: 'plugin', plugin: 'test' } }) + }) + + it('a post-execute additionalContext rides on the result for the loop to buffer', async () => { + const ctx = await setup() + ctx.tools.register(echoTool) + + ctx.on('tools/post-execute', async (_exec, _result, _next): Promise => + ({ kind: 'accept', additionalContext: { content: [{ type: 'text', text: 'fyi' }], source: { kind: 'plugin', plugin: 'test' } } })) + + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) + expect(result.additionalContext).toMatchObject({ content: [{ text: 'fyi' }], source: { kind: 'plugin', plugin: 'test' } }) + }) + + it('composes pre + post waterfalls around dispatch (sandbox-wrap pattern)', async () => { const ctx = await setup() ctx.tools.register(echoTool) const order: string[] = [] - ctx.on('tools/execute', async (_exec, next) => { - order.push('first:before') - const result = await next() - order.push('first:after') - return result + ctx.on('tools/pre-execute', async (_exec, next) => { + order.push('pre:before') + const decision = await next() + order.push('pre:after') + return decision }) - ctx.on('tools/execute', async (_exec, next) => { - order.push('second:before') - const result = await next() - order.push('second:after') - return result + ctx.on('tools/post-execute', async (_exec, _result, next) => { + order.push('post:before') + const decision = await next() + order.push('post:after') + return decision }) const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'x' } }) expect(result.isError).toBe(false) - expect(order).toEqual(['first:before', 'second:before', 'second:after', 'first:after']) + // pre runs fully (gate) before dispatch, then post runs over the result. + expect(order).toEqual(['pre:before', 'pre:after', 'post:before', 'post:after']) }) - it('returns an isError result when a tools/execute listener throws', async () => { + it('returns an isError result when a tools/pre-execute listener throws', async () => { const ctx = await setup() ctx.tools.register(echoTool) - ctx.on('tools/execute', async () => { + ctx.on('tools/pre-execute', async () => { throw new Error('permission hook broke') }) @@ -171,10 +241,26 @@ describe('ToolRegistry', () => { }) }) - it('preserves structured error info when a tools/execute listener throws HarnessError', async () => { + it('returns an isError result when a tools/post-execute listener throws', async () => { const ctx = await setup() ctx.tools.register(echoTool) - ctx.on('tools/execute', async () => { + ctx.on('tools/post-execute', async () => { + throw new Error('post hook broke') + }) + + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) + + expect(result).toEqual({ + callId: CallId('c1'), + content: [{ type: 'text', text: 'Error: post hook broke' }], + isError: true, + }) + }) + + it('preserves structured error info when a tools/pre-execute listener throws HarnessError', async () => { + const ctx = await setup() + ctx.tools.register(echoTool) + ctx.on('tools/pre-execute', async () => { throw new HarnessError('denied', 'DENIED') }) diff --git a/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts b/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts index dda4e7c3d0..2f40cd6f8c 100644 --- a/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts +++ b/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts @@ -276,6 +276,14 @@ describe('dsh-tool-subagent', () => { const controller = new AbortController() const pending = callSubagent(ctx, { description: 'd', prompt: 'p' }, { signal: controller.signal }) + // Abort AFTER the tool body has had a chance to register its abort listener + // (ctx.tools.execute now awaits the tools/pre-execute waterfall before the + // body runs, so the listener is not registered synchronously). A few + // microtask turns let execute() reach `addEventListener('abort')`, so this + // exercises the LIVE onAbort bridge — distinct from the already-aborted + // sync path the next test covers. + await Promise.resolve() + await Promise.resolve() controller.abort() const result = await pending expect(cancelled).toHaveBeenCalledTimes(1) diff --git a/packages/ui/acp/src/codec.ts b/packages/ui/acp/src/codec.ts index 5f5a53f529..57622fbbfe 100644 --- a/packages/ui/acp/src/codec.ts +++ b/packages/ui/acp/src/codec.ts @@ -34,6 +34,10 @@ import type { ContentBlock as AcpContentBlock, StopReason } from '@agentclientpr * for any non-bridge caller / property test.) * - `disposed` → `cancelled` (the agent was torn down mid-turn — closest to a * cancellation from the client's perspective) + * - `rejected` → `cancelled` (the prompt was blocked by an `agent/prompt-submit` + * hook before any step ran — ACP has no "rejected" reason, and a + * blocked prompt is, from the client's view, the prompt not being + * carried out; `cancelled` is the closest legal wire reason) */ export function turnEndToStopReason(reason: TurnEndReason): StopReason { switch (reason.kind) { @@ -45,6 +49,8 @@ export function turnEndToStopReason(reason: TurnEndReason): StopReason { return 'cancelled' case 'disposed': return 'cancelled' + case 'rejected': + return 'cancelled' case 'error': return 'end_turn' // Merge-extensible: an unknown future TurnEndReason kind still has to diff --git a/packages/ui/acp/tests/codec.spec.ts b/packages/ui/acp/tests/codec.spec.ts index 9d82fe7533..859e8d40cd 100644 --- a/packages/ui/acp/tests/codec.spec.ts +++ b/packages/ui/acp/tests/codec.spec.ts @@ -16,6 +16,7 @@ describe('turnEndToStopReason', () => { expect(turnEndToStopReason({ kind: 'max-tokens' })).toBe('max_tokens') expect(turnEndToStopReason({ kind: 'aborted', reason: 'x' })).toBe('cancelled') expect(turnEndToStopReason({ kind: 'disposed' })).toBe('cancelled') + expect(turnEndToStopReason({ kind: 'rejected', reason: 'blocked by hook' })).toBe('cancelled') expect(turnEndToStopReason({ kind: 'error', step: 1, message: 'boom' })).toBe('end_turn') }) diff --git a/scripts/type-equiv.manifest.json b/scripts/type-equiv.manifest.json index c5e4c10b71..a1d31973ac 100644 --- a/scripts/type-equiv.manifest.json +++ b/scripts/type-equiv.manifest.json @@ -10,6 +10,10 @@ { "doc": "docs/core-data-structures/core.md", "symbol": "ToolSchema", "source": "packages/llm/llm/src/types.ts" }, { "doc": "docs/core-data-structures/core.md", "symbol": "SessionEvent", "source": "packages/core/session/src/types.ts" }, { "doc": "docs/core-data-structures/core.md", "symbol": "Agent", "source": "packages/core/agent/src/types.ts" }, + { "doc": "docs/core-data-structures/core.md", "symbol": "HookContext", "source": "packages/core/agent/src/types.ts" }, + { "doc": "docs/core-data-structures/core.md", "symbol": "PromptDecision", "source": "packages/core/agent/src/types.ts" }, + { "doc": "docs/core-data-structures/core.md", "symbol": "ContinuationDecision", "source": "packages/core/agent/src/types.ts" }, + { "doc": "docs/core-data-structures/core.md", "symbol": "SessionStartSource", "source": "packages/core/agent/src/types.ts" }, { "doc": "docs/core-data-structures/llm-streaming.md", "symbol": "StreamChunk", "source": "packages/llm/llm/src/types.ts" }, { "doc": "docs/core-data-structures/llm-streaming.md", "symbol": "TokenUsage", "source": "packages/llm/llm/src/types.ts" }, @@ -34,6 +38,8 @@ { "doc": "docs/core-data-structures/tools.md", "symbol": "InferArgs", "source": "packages/core/tools/src/schema.ts" }, { "doc": "docs/core-data-structures/tools.md", "symbol": "ToolExecution", "source": "packages/core/tools/src/index.ts" }, { "doc": "docs/core-data-structures/tools.md", "symbol": "ToolExecutionResult", "source": "packages/core/tools/src/index.ts" }, + { "doc": "docs/core-data-structures/tools.md", "symbol": "PreToolDecision", "source": "packages/core/tools/src/index.ts" }, + { "doc": "docs/core-data-structures/tools.md", "symbol": "PostToolDecision", "source": "packages/core/tools/src/index.ts" }, { "doc": "docs/core-data-structures/bash.md", "symbol": "BashExecRequest", "source": "packages/bash/bash/src/types.ts" }, { "doc": "docs/core-data-structures/bash.md", "symbol": "BashExecSpec", "source": "packages/bash/bash/src/types.ts" }, From 483e0e5edf5fcd965afeba0cb61d2819fb6dcad2 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 20:25:30 +0800 Subject: [PATCH 08/47] =?UTF-8?q?fix(events):=20address=20Codex=20review?= =?UTF-8?q?=20=E2=80=94=20protect=20post-execute=20result,=20purge=20stale?= =?UTF-8?q?=20tools/execute=20refs?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex's PR-C review found two (A) blockers: - tools/post-execute could corrupt the protected outcome. postExecute passed the mutable `result` to listeners and then read result.callId / spread result on the return paths, so a listener mutating the reference (flipping isError, rewriting callId, injecting an error) escaped the decision channel. Now the authoritative callId/isError/error are SNAPSHOT before the waterfall and the return value is rebuilt from the snapshot + the typed PostToolDecision — the decision is the only sanctioned way to change the outcome, and callId is always exec.callId. Added a regression test that mutates the result reference and asserts it has no effect; proven to fail red on the unfixed code. - Public docs/JSDoc still advertised the removed `tools/execute` waterfall after the split. Swept every current-state reference to tools/pre-execute + tools/post-execute: the ToolRegistry class JSDoc (and the regenerated catalog), loop.ts's ASCII flow (also added the prompt-submit/session-start steps it was missing), the package-map READMEs (packages, core, agent-core), core-data-structures core.md/tools.md, the bash + acp + invariants src/READMEs (the deferred permission gate is the tools/pre-execute deny/ask seam now), the cookbook, and the implemented RFCs whose factual seam catalog drifted. codec.ts's totality prose now lists `rejected`. Proposed-RFC references are left as-is (frozen proposals, validated when built). --- docs/cookbook/adding-a-tool.md | 2 +- docs/cordis-catalog/events-and-services.md | 4 ++-- docs/core-data-structures/core.md | 2 +- docs/core-data-structures/tools.md | 2 +- ...06-11-dev-invariants-over-deep-readonly.md | 2 +- .../2026-06-11-microkernel-event-taxonomy.md | 2 +- .../2026-06-13-capability-seams.md | 2 +- .../2026-06-21-subagent-capability-seam.md | 2 +- packages/README.md | 2 +- packages/bash/bash-local/README.md | 2 +- packages/bash/bash-local/src/index.ts | 4 ++-- packages/bash/tool-bash/README.md | 2 +- packages/bash/tool-bash/src/index.ts | 2 +- packages/core/README.md | 2 +- packages/core/agent-core/README.md | 2 +- packages/core/agent-loop/src/loop.ts | 17 +++++++++---- packages/core/tools/src/index.ts | 22 +++++++++++++---- packages/core/tools/tests/tools.spec.ts | 24 +++++++++++++++++++ packages/support/invariants/README.md | 2 +- packages/support/invariants/src/index.ts | 4 ++-- packages/ui/acp/README.md | 2 +- packages/ui/acp/src/codec.ts | 3 ++- packages/ui/acp/src/index.ts | 2 +- 23 files changed, 78 insertions(+), 32 deletions(-) diff --git a/docs/cookbook/adding-a-tool.md b/docs/cookbook/adding-a-tool.md index 73706c84f1..53906e3a49 100644 --- a/docs/cookbook/adding-a-tool.md +++ b/docs/cookbook/adding-a-tool.md @@ -46,7 +46,7 @@ Follow tool-bash's background pattern: a `run_in_background` flag returns a task ## Permissions / sandboxing -Prefer not to build policy into the tool. The seam is the `tools/execute` waterfall (veto or wrap — see the permission-gate example in [extension-cookbook.md](./extension-cookbook.md)), or a sandboxing implementation behind the tool's executor seam. +Prefer not to build policy into the tool. The seam is the `tools/pre-execute` gate (deny/ask — see the permission-gate example in [extension-cookbook.md](./extension-cookbook.md)) and the `tools/post-execute` inspect/transform seam, or a sandboxing implementation behind the tool's executor seam. ## Tests every tool needs diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index d37d2d4070..a8afdbd5f1 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -471,7 +471,7 @@ Source: [`packages/core/system-prompt/src/index.ts:71`](../../packages/core/syst ### `ctx.tools` — `ToolRegistry` -Tool registry (`ctx.tools`): tool plugins register definitions; the agent loop executes calls through the `tools/execute` waterfall. The registry contributes its schemas into the system-prompt assembly. +Tool registry (`ctx.tools`): tool plugins register definitions; the agent loop executes calls through the `tools/pre-execute` → dispatch → `tools/post-execute` pipeline. The registry contributes its schemas into the system-prompt assembly. ```ts cordis-catalog register(definition: ToolDefinition): () => void @@ -482,7 +482,7 @@ async execute(exec: ToolExecution): Promise Types: [ToolDefinition](../core-data-structures/tools.md) · [ToolExecution](../core-data-structures/tools.md) · [ToolExecutionResult](../core-data-structures/tools.md) -Source: [`packages/core/tools/src/index.ts:341`](../../packages/core/tools/src/index.ts) +Source: [`packages/core/tools/src/index.ts:342`](../../packages/core/tools/src/index.ts) ## Inherited tier (cordis core + loader/hmr/timer) diff --git a/docs/core-data-structures/core.md b/docs/core-data-structures/core.md index 78fc36edd9..2a430cebab 100644 --- a/docs/core-data-structures/core.md +++ b/docs/core-data-structures/core.md @@ -18,7 +18,7 @@ Everything else is documented on a **sub-page**, not here. The rule that draws t | [llm-streaming.md](llm-streaming.md) | the `StreamChunk` wire protocol + adapter contract, `BlockAssembler`, the `LlmAdapter` seam | | [session.md](session.md) | the full `SessionEventMap` variant catalog, `TurnTrigger`/`TurnEndReason`, `deriveMessages()`, the turn-enclosure invariant | | [persistence.md](persistence.md) | the durability seam: `SessionPersistence`, JSONL + SQLite backends, `session/flush`, crash recovery, `SessionHeader` | -| [tools.md](tools.md) | `ToolDefinition` full fields, the schema DSL, `ToolExecution`/`ToolResult`, tool-presentation UI types, the `tools/execute` waterfall | +| [tools.md](tools.md) | `ToolDefinition` full fields, the schema DSL, `ToolExecution`/`ToolResult`, tool-presentation UI types, the `tools/pre-execute`/`tools/post-execute` pipeline | | [bash.md](bash.md) | the bash executor seam: `BashExecRequest`/`Spec`, `BashRunResult`, background `BashTask`s | | [compaction.md](compaction.md) | the compaction seam: the `compact/*` session events, `CompactionResult`, the `CompactService` interface | | [subagent.md](subagent.md) | the subagent seam: the named-provider registry, `SubagentStartRequest`/`Result`/`Run`, the start-time-vs-runtime capability split | diff --git a/docs/core-data-structures/tools.md b/docs/core-data-structures/tools.md index 4d6306de14..e5a404803b 100644 --- a/docs/core-data-structures/tools.md +++ b/docs/core-data-structures/tools.md @@ -71,7 +71,7 @@ type InferArgs = Simplify< `defineTool({ name, description, parameters, execute, … })` ties it together: `parameters` is a `SchemaSpec`, `execute(args, exec)` gets `args: InferArgs`, and the helper converts the spec to JSON Schema (`schemaSpecToJsonSchema`) for the wire and validates model-generated args (`validateArgs`) before the typed body runs. A mismatch throws `ToolArgsError` (`code: 'INVALID_ARGS'`), which the registry turns into an `isError` result so the model can self-correct. Why a custom DSL and not schemastery: tool parameters need JSON Schema (the LLM wire format), not validation/transformation — the lightweight DSL gives the best authoring DX with the smallest surface. -## Execution: the `tools/execute` waterfall shapes +## Execution: the `tools/pre-execute` / `tools/post-execute` pipeline shapes `ctx.tools.execute()` runs each call through a two-waterfall pipeline — `tools/pre-execute` (the allow/deny/ask gate) → core dispatch → `tools/post-execute` (inspect/replace the result, attach context) — the seams where sandbox, permission, hook, and plan-mode plugins gate or transform a call. The pending call is a `ToolExecution`; the outcome is a `ToolExecutionResult`. diff --git a/docs/rfc/implemented/architecture/2026-06-11-dev-invariants-over-deep-readonly.md b/docs/rfc/implemented/architecture/2026-06-11-dev-invariants-over-deep-readonly.md index b9a182a4e9..212d2e82b7 100644 --- a/docs/rfc/implemented/architecture/2026-06-11-dev-invariants-over-deep-readonly.md +++ b/docs/rfc/implemented/architecture/2026-06-11-dev-invariants-over-deep-readonly.md @@ -17,7 +17,7 @@ Reject the pervasive `DeepReadonly` type flip. Instead: 1. **Always-on:** `deriveMessages()` deep-clones the content it emits (one `structuredClone` per derived message). In-flight mutation of a request can no longer reach the log — this is the real fix, and it costs nothing meaningful next to a model call. 2. **Dev-mode:** a new `dsh-invariants` plugin (pure listeners, off in production, on in tests and demos) asserts the event contract and `Object.freeze`s logged event data so any *other* code that mutates a logged event throws instead of corrupting silently. Seeded sessions are frozen and checked on `session/created` (the constructor copies the seed without emitting `session/event`). -The invariants encode the *real* contract, not an idealized one: a `tool/call` may have no `tool/result` (a thrown `tools/execute` waterfall ends the step), and both `idle→disposed` and `running→disposed` are legal. +The invariants encode the *real* contract, not an idealized one: a `tool/call` may have no `tool/result` (a thrown tool-execution pipeline step ends the turn), and both `idle→disposed` and `running→disposed` are legal. `DeepReadonly` was rejected because it is compile-time only (a plugin casts straight through it), high type-noise across every log/message consumer and adapter, and would force readonly types through code where mutation is the sanctioned API. The clone draws the mutable/immutable boundary exactly at "logged vs in-flight" without any of that noise. diff --git a/docs/rfc/implemented/architecture/2026-06-11-microkernel-event-taxonomy.md b/docs/rfc/implemented/architecture/2026-06-11-microkernel-event-taxonomy.md index c8869c0616..c1a7aba68f 100644 --- a/docs/rfc/implemented/architecture/2026-06-11-microkernel-event-taxonomy.md +++ b/docs/rfc/implemented/architecture/2026-06-11-microkernel-event-taxonomy.md @@ -12,7 +12,7 @@ The product principle (see the 微内核Harness实现思路 design doc) is "ever Pure Cordis event taxonomy. The loop's extension seams are typed events with deliberate dispatch modes: -- **waterfall** (around-middleware) where plugins mutate or veto: `agent/request`, `agent/step-result`, `agent/turn-continuation`, `tools/execute`, `llm/stream`, `system-prompt/assemble`. +- **waterfall** (around-middleware) where plugins mutate or veto: `agent/prompt-submit`, `agent/request`, `agent/step-result`, `agent/turn-continuation`, `tools/pre-execute`, `tools/post-execute`, `llm/stream`, `system-prompt/assemble`. - **emit** (sync fire-and-forget) for notifications: turn/step boundaries, stream chunks, lifecycle, errors. - **parallel** (awaited) for the one durability checkpoint: `session/flush`. diff --git a/docs/rfc/implemented/architecture/2026-06-13-capability-seams.md b/docs/rfc/implemented/architecture/2026-06-13-capability-seams.md index e66440c3ee..46bfe88d50 100644 --- a/docs/rfc/implemented/architecture/2026-06-13-capability-seams.md +++ b/docs/rfc/implemented/architecture/2026-06-13-capability-seams.md @@ -20,7 +20,7 @@ A swappable capability is **three packages**: Implementation and consumer then evolve independently: a sandboxed executor replaces `dsh-bash-local` without touching a tool schema. -Alternatives considered: **one combined package** — rejected because it recouples the three rates of change the split exists to separate (the whole point). **`@cordisjs/plugin-capability`** — a different axis entirely: it is a permission/capability-*security* service (named permissions with inheritance, tested against a session via `ctx.capability.test`), a candidate for the deferred permissions/sandbox work on the `tools/execute` veto seam, NOT a mechanism for swapping implementations. Confusing the two ("capability") is the trap this RFC names. +Alternatives considered: **one combined package** — rejected because it recouples the three rates of change the split exists to separate (the whole point). **`@cordisjs/plugin-capability`** — a different axis entirely: it is a permission/capability-*security* service (named permissions with inheritance, tested against a session via `ctx.capability.test`), a candidate for the deferred permissions/sandbox work on the `tools/pre-execute` deny/ask seam, NOT a mechanism for swapping implementations. Confusing the two ("capability") is the trap this RFC names. The split is not mandatory when the parts are genuinely one concern: the LLM seam folds interface + consumer into `dsh-llm` (the consumer is the loop itself, not a swappable schema surface) with adapters as the implementation packages. Don't split preemptively — a capability with one conceivable implementation and one consumer stays one package until a second appears. diff --git a/docs/rfc/implemented/feature/2026-06-21-subagent-capability-seam.md b/docs/rfc/implemented/feature/2026-06-21-subagent-capability-seam.md index f733daca7b..77a838b299 100644 --- a/docs/rfc/implemented/feature/2026-06-21-subagent-capability-seam.md +++ b/docs/rfc/implemented/feature/2026-06-21-subagent-capability-seam.md @@ -66,7 +66,7 @@ The `dsh-tool-subagent` consumer awaits `run.result` and returns the child's fin ## Risks and deferrals -- **Recursion.** Without a guard, an in-process child inherits the spawn tool and can spawn unboundedly. Depth-limit is an optional capability (the in-process backends enforce it; ACP advertises it off and rejects a `maxDepth` request); tool-filtering is likewise optional. Tool-filtering, when implemented, needs a `tools/execute` veto in the child context — schema filtering alone is insufficient because a model can hallucinate a denied tool name. +- **Recursion.** Without a guard, an in-process child inherits the spawn tool and can spawn unboundedly. Depth-limit is an optional capability (the in-process backends enforce it; ACP advertises it off and rejects a `maxDepth` request); tool-filtering is likewise optional. Tool-filtering, when implemented, needs a `tools/pre-execute` deny in the child context — schema filtering alone is insufficient because a model can hallucinate a denied tool name. - **Blocking the parent turn.** Synchronous collect holds the parent's `runStep` open for the child's full duration. This is acceptable for the first cut; **background / poll / spill semantics are deferred to a future redesign that unifies long-running-tool handling across subagents AND bash** (a sub-agent and a long `bash` background task pose the same "the model started something slow, how does it collect later" problem, and should share one mechanism rather than each inventing its own). - **Live progress.** This cut surfaces only lifecycle + final result; a per-chunk child→parent update stream is deferred with the background redesign. - **ACP client surface.** Proxying `fs`/`terminal` from the ACP child back to the parent (a shared-workspace mode) is future work; the first cut advertises neither, so the child self-serves in its own process. diff --git a/packages/README.md b/packages/README.md index 3997fd5190..7f63e305dc 100644 --- a/packages/README.md +++ b/packages/README.md @@ -62,7 +62,7 @@ The rule: **extension** plugins depend on interfaces, never on the concrete loop | `llm/` | `llm` | Abstract LLM service + content-block vocabulary + chunk assembler | `ctx.llm` | | `session/` | `core` | Event-sourced session log + in-memory store | `ctx.sessions` | | `system-prompt/` | `core` | Prompt-section + tool-schema assembly registry | `ctx.systemPrompt` | -| `tools/` | `core` | Tool registry + `tools/execute` waterfall | `ctx.tools` | +| `tools/` | `core` | Tool registry + `tools/pre-execute`/`tools/post-execute` pipeline | `ctx.tools` | | `agent/` | `core` | Agent interface, registry, `agent/*` event vocabulary | `ctx.agents` | | `agent-loop/` | `core` | THE concrete loop plugin: `ReactLoopAgent` + the loop driver | `ctx.agentLoop` | | `agent-core/` | `core` | Bundle plugin: the providerless/executor-less/UI-less spine as code (forwards `agent-loop`'s `agents`) | (loads the spine) | diff --git a/packages/bash/bash-local/README.md b/packages/bash/bash-local/README.md index 2ae905b628..9625442f68 100644 --- a/packages/bash/bash-local/README.md +++ b/packages/bash/bash-local/README.md @@ -26,4 +26,4 @@ Design surveyed against the bash tools of Claude Code, OpenCode, Codex, and pi; ## Sandboxing -`TODO(permissions/sandbox)`: execution policy does NOT belong in this package. Wrap the `tools/execute` waterfall (veto/ask) or implement a sandboxing `BashExecutor` — see docs/architecture.md § plugin checklist. Reference points: Claude Code wraps commands in sandbox-exec/bubblewrap; Codex applies seatbelt/landlock plus an execpolicy prefix-rule engine. +`TODO(permissions/sandbox)`: execution policy does NOT belong in this package. Use the `tools/pre-execute` deny/ask gate or implement a sandboxing `BashExecutor` — see docs/architecture.md § plugin checklist. Reference points: Claude Code wraps commands in sandbox-exec/bubblewrap; Codex applies seatbelt/landlock plus an execpolicy prefix-rule engine. diff --git a/packages/bash/bash-local/src/index.ts b/packages/bash/bash-local/src/index.ts index 53c369a24c..8b9cf04e7d 100644 --- a/packages/bash/bash-local/src/index.ts +++ b/packages/bash/bash-local/src/index.ts @@ -4,8 +4,8 @@ * own process group (see `./run.ts` for the plumbing and the agent-tool * survey notes), tracks background tasks, and kills everything on dispose. * - * TODO(permissions/sandbox): execution policy does NOT belong here — wrap - * the `tools/execute` waterfall (see docs/architecture.md § plugin + * TODO(permissions/sandbox): execution policy does NOT belong here — use + * the `tools/pre-execute` deny/ask gate (see docs/architecture.md § plugin * checklist) or implement a sandboxing `BashExecutor`. Reference points: * Claude Code wraps commands in sandbox-exec/bubblewrap; Codex applies * seatbelt/landlock plus an execpolicy prefix-rule engine. diff --git a/packages/bash/tool-bash/README.md b/packages/bash/tool-bash/README.md index f7a15894f9..893a989e55 100644 --- a/packages/bash/tool-bash/README.md +++ b/packages/bash/tool-bash/README.md @@ -46,4 +46,4 @@ The `BashExecRequest` seam carries optional `stdin` and `env` (a **trusted-plugi ## Permissions -`TODO(permissions)`: commands run with the executor's full authority. The permission/sandbox seam is the `tools/execute` waterfall (veto or ask) plus sandboxing `BashExecutor` implementations — see docs/architecture.md. `@cordisjs/plugin-capability` (a named-permission service with a session `test()`) is a candidate building block for that work. +`TODO(permissions)`: commands run with the executor's full authority. The permission/sandbox seam is the `tools/pre-execute` waterfall (deny or ask) plus sandboxing `BashExecutor` implementations — see docs/architecture.md. `@cordisjs/plugin-capability` (a named-permission service with a session `test()`) is a candidate building block for that work. diff --git a/packages/bash/tool-bash/src/index.ts b/packages/bash/tool-bash/src/index.ts index 9ad1f9a17c..492bd28d3c 100644 --- a/packages/bash/tool-bash/src/index.ts +++ b/packages/bash/tool-bash/src/index.ts @@ -31,7 +31,7 @@ * pre-existing reload-gap drop — but the ownership fence itself is HMR-proof.) * * TODO(permissions): commands run with the executor's full authority. The - * permission/sandbox seam is the `tools/execute` waterfall (veto/ask) plus + * permission/sandbox seam is the `tools/pre-execute` waterfall (deny/ask) plus * sandboxing `BashExecutor` implementations — see docs/architecture.md * § plugin checklist. * diff --git a/packages/core/README.md b/packages/core/README.md index 8d8805471a..7030dcc0eb 100644 --- a/packages/core/README.md +++ b/packages/core/README.md @@ -6,7 +6,7 @@ The packages every harness build is assembled from: the session log, the system- |---|---|---| | `session/` | Event-sourced session log + in-memory store | `ctx.sessions` | | `system-prompt/` | Prompt-section + tool-schema assembly registry | `ctx.systemPrompt` | -| `tools/` | Tool registry + `tools/execute` waterfall | `ctx.tools` | +| `tools/` | Tool registry + `tools/pre-execute`/`tools/post-execute` pipeline | `ctx.tools` | | `agent/` | Agent interface, registry, `agent/*` event vocabulary | `ctx.agents` | | `agent-loop/` | The concrete loop plugin: `ReactLoopAgent` + the loop driver | `ctx.agentLoop` | | `agent-core/` | Bundle plugin: the providerless/executor-less/UI-less spine as code | (loads the spine) | diff --git a/packages/core/agent-core/README.md b/packages/core/agent-core/README.md index 28a3592ac6..022ccba4f4 100644 --- a/packages/core/agent-core/README.md +++ b/packages/core/agent-core/README.md @@ -13,7 +13,7 @@ This is the package to read to see **the whole plugin tree at once** — the tea @deepseek-ai/dsh-llm abstract LLM service + content-block vocabulary @deepseek-ai/dsh-session event-sourced session log + store @deepseek-ai/dsh-system-prompt prompt-section + tool-schema assembly -@deepseek-ai/dsh-tools tool registry + tools/execute waterfall +@deepseek-ai/dsh-tools tool registry + tools/pre-execute/post-execute @deepseek-ai/dsh-agent agent registry + agent/* event vocabulary @deepseek-ai/dsh-invariants dev-mode event-contract assertions @deepseek-ai/dsh-tool-bash the model-facing bash/bash_output/bash_kill schemas diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index 6ac98743a2..735db7c20a 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -142,10 +142,13 @@ export interface LoopHandle { * The agent loop. One invocation drives one agent for its whole lifetime: * * ``` + * create agent → emit agent/session-start(source) ⟵ once, before turn 1 * forever: * wait for queued messages (idle) * TURN (error-contained — a throwing plugin ends the turn, never the loop): - * drain queued → 'turn/start' → session('user/message'…) → emit agent/turn-start + * 'turn/start'; each queued msg: waterfall agent/prompt-submit + * allow → session('user/message'…) (+ inject additionalContext) | block → drop + * every prompt blocked → 'turn/end'(rejected), 0 steps; emit agent/turn-start * STEP loop: * drain steering → session('steering/message') ⟵ catches late steering * session('step/start') ⟵ durable step boundary (no agent/* mirror) @@ -157,13 +160,17 @@ export interface LoopHandle { * msg = waterfall agent/step-result ⟵ BEFORE the log append, so the * session('assistant/message' {content, usage?}) session records what actually ran * each tool-call in msg (sequential, abort-checked): - * session('tool/call'); ctx.tools.execute() ⟵ waterfall tools/execute + * session('tool/call'); ctx.tools.execute() ⟵ tools/pre-execute (allow/deny/ask) + * → dispatch → tools/post-execute * session('tool/result') + * append buffered post-execute additionalContext → session('context/message')(s) * drain steering → session('steering/message'); emit agent/steering * session('step/end') ⟵ durable step boundary (no agent/* mirror) - * cont = waterfall agent/turn-continuation(default = hadToolCalls || steered) - * if !cont && steering arrived from step/end session-event/continuation listeners: cont = true - * if !cont: break + * cont = waterfall agent/turn-continuation ⟵ ContinuationDecision; default + * {action: hadToolCalls||steered ? 'continue':'stop'}; a continue.reason is + * recorded as next-step steering + * if action==stop && steering arrived (step/end/continuation listeners): continue anyway + * if action==stop: break * session('turn/end'); emit agent/turn-end * await ctx.parallel('session/flush', session) ⟵ durability checkpoint * re-enqueue leftover steering as queued ⟵ steering is never stranded diff --git a/packages/core/tools/src/index.ts b/packages/core/tools/src/index.ts index 25f57ed400..a8f881c214 100644 --- a/packages/core/tools/src/index.ts +++ b/packages/core/tools/src/index.ts @@ -335,8 +335,9 @@ function errorInfo(error: unknown): ToolErrorInfo | undefined { /** * Tool registry (`ctx.tools`): tool plugins register definitions; the agent - * loop executes calls through the `tools/execute` waterfall. The registry - * contributes its schemas into the system-prompt assembly. + * loop executes calls through the `tools/pre-execute` → dispatch → + * `tools/post-execute` pipeline. The registry contributes its schemas into the + * system-prompt assembly. */ export class ToolRegistry extends Service { static inject = ['systemPrompt'] @@ -464,6 +465,19 @@ export class ToolRegistry extends Service { * Runs inside `execute`'s outer try/catch (a throwing listener → isError). */ private async postExecute(exec: ToolExecution, result: ToolExecutionResult): Promise { + // Snapshot the protected outcome BEFORE the waterfall. A listener receives + // the same `result` reference, so a post-waterfall read of `result.callId`/ + // `.isError`/`.error` could carry a listener's mutation — violating the + // authoritative-call-id requirement and the "preserve the dispatched + // isError/error" contract. The decision is the ONLY sanctioned channel for a + // listener to change the outcome (block, or accept-with-replacement); the + // call id is always the authoritative `exec.callId`. + const dispatched = { + callId: exec.callId, + content: result.content, + isError: result.isError, + ...result.error ? { error: result.error } : {}, + } const decision = await this.ctx.waterfall( this, 'tools/post-execute', exec, result, () => Promise.resolve({ kind: 'accept' }), @@ -471,7 +485,7 @@ export class ToolRegistry extends Service { const additionalContext = decision.additionalContext if (decision.kind === 'block') { return { - callId: result.callId, + callId: dispatched.callId, content: decision.feedback, isError: true, ...additionalContext ? { additionalContext } : {}, @@ -479,7 +493,7 @@ export class ToolRegistry extends Service { } // accept: replace content if supplied, preserve the dispatched isError/error. return { - ...result, + ...dispatched, ...decision.content ? { content: decision.content } : {}, ...additionalContext ? { additionalContext } : {}, } diff --git a/packages/core/tools/tests/tools.spec.ts b/packages/core/tools/tests/tools.spec.ts index e67650ec95..ef67eddb95 100644 --- a/packages/core/tools/tests/tools.spec.ts +++ b/packages/core/tools/tests/tools.spec.ts @@ -201,6 +201,30 @@ describe('ToolRegistry', () => { expect(result.additionalContext).toMatchObject({ content: [{ text: 'fyi' }], source: { kind: 'plugin', plugin: 'test' } }) }) + it('a post-execute listener mutating the result object cannot corrupt callId/isError/error', async () => { + // The decision is the ONLY sanctioned channel to change the outcome. A + // listener that reaches in and mutates the passed result reference (flipping + // isError, rewriting callId, attaching a bogus error) must NOT affect what + // execute() returns — the registry snapshots the authoritative fields before + // the waterfall and rebuilds from the snapshot + decision. + const ctx = await setup() + ctx.tools.register(echoTool) + + ctx.on('tools/post-execute', async (_exec, result, next) => { + const mutable = result as { callId: string; isError: boolean; error?: unknown } + mutable.callId = 'hijacked' + mutable.isError = true + mutable.error = { name: 'Evil', code: 'EVIL' } + return next() // delegate to the default accept — no decision-level override + }) + + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: { text: 'hi' } }) + expect(result.callId).toBe(CallId('c1')) // authoritative exec.callId, not 'hijacked' + expect(result.isError).toBe(false) // the real (successful) dispatch outcome + expect(result.error).toBeUndefined() // no listener-injected error + expect(result.content[0]).toMatchObject({ text: 'hi' }) + }) + it('composes pre + post waterfalls around dispatch (sandbox-wrap pattern)', async () => { const ctx = await setup() ctx.tools.register(echoTool) diff --git a/packages/support/invariants/README.md b/packages/support/invariants/README.md index a08ccf01a7..b26170d48e 100644 --- a/packages/support/invariants/README.md +++ b/packages/support/invariants/README.md @@ -34,7 +34,7 @@ Session log (per session): - **turns pair and nest** — `turn/start` opens a turn, `turn/end` closes the matching one; no overlapping turns. - **steps nest in turns** — `step/start` opens a step in the open turn; `step/end` closes the matching step. - **chunks belong to an open step** — `step/start` precedes its `assistant/chunk`s. -- **a `tool/result` needs a prior `tool/call`** — but NOT the converse: a `tool/call` may have no result (a thrown `tools/execute` waterfall ends the step with no `tool/result`, which is legal). +- **a `tool/result` needs a prior `tool/call`** — but NOT the converse: a `tool/call` may have no result (a thrown tool-execution pipeline step ends the turn with no `tool/result`, which is legal). Agent status (per agent): diff --git a/packages/support/invariants/src/index.ts b/packages/support/invariants/src/index.ts index b2372e28db..5e3fd26b82 100644 --- a/packages/support/invariants/src/index.ts +++ b/packages/support/invariants/src/index.ts @@ -259,8 +259,8 @@ function checkEvent(trace: SessionTrace, event: SessionEvent): void { case 'tool/result': { requireOpenStep(trace, 'tool/result', event.data.turn, event.data.step) // A result needs a prior matching call in the same step. (The converse - // does NOT hold: a call may have no result — a throwing tools/execute - // waterfall ends the step with no tool/result, which is legal.) + // does NOT hold: a call may have no result — a throwing tool-execution + // pipeline step ends the turn with no tool/result, which is legal.) const syntheticInterrupted = event.data.isError && event.data.error?.code === 'interrupted' if (!trace.pendingCalls.delete(event.data.callId) && !syntheticInterrupted) { throw new InvariantError(`tool/result for ${event.data.callId} with no prior tool/call in this step`) diff --git a/packages/ui/acp/README.md b/packages/ui/acp/README.md index ad50383542..524a873467 100644 --- a/packages/ui/acp/README.md +++ b/packages/ui/acp/README.md @@ -65,7 +65,7 @@ Teardown reaches quiescence: for EVERY live session settle any pending prompt as ## Known limitations (tracked TODOs) -- **`TODO(rfc010-permission-gate)`** — the `tools/execute` permission gate (`session/request_permission`) is NOT implemented; tools run with the executor's full authority. The `agent→sessionId` reverse map is in place so the gate can route a permission request (which receives only `exec.agent`) back to its originating session. [ACP support](../../../docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md) and [ACP multi-session](../../../docs/rfc/proposed/feature/2026-06-14-acp-multi-session.md) stay `proposed` until the gate (and per-session permission ownership) land. +- **`TODO(rfc010-permission-gate)`** — the `tools/pre-execute` permission gate (`session/request_permission`) is NOT implemented; tools run with the executor's full authority. The `agent→sessionId` reverse map is in place so the gate can route a permission request (which receives only `exec.agent`) back to its originating session. [ACP support](../../../docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md) and [ACP multi-session](../../../docs/rfc/proposed/feature/2026-06-14-acp-multi-session.md) stay `proposed` until the gate (and per-session permission ownership) land. - **`additionalDirectories`** — rejected. A session operates in its single `cwd` (see Per-session cwd); widening the tool/filesystem scope to extra roots is a separate sandbox concern, not yet implemented. ## stdout is the protocol diff --git a/packages/ui/acp/src/codec.ts b/packages/ui/acp/src/codec.ts index 57622fbbfe..3b03a81c83 100644 --- a/packages/ui/acp/src/codec.ts +++ b/packages/ui/acp/src/codec.ts @@ -17,7 +17,8 @@ import type { ContentBlock as AcpContentBlock, StopReason } from '@agentclientpr * Map a harness {@link TurnEndReason} to the ACP `StopReason` wire enum. * * The mapping is total over the kinds the loop actually produces today - * (`completed`/`aborted`/`error`/`disposed`/`max-tokens`). `TurnEndReason` is + * (`completed`/`aborted`/`error`/`disposed`/`max-tokens`/`rejected`). + * `TurnEndReason` is * merge-extensible, so an unknown future kind falls through to `end_turn` — * the safest default (the turn DID end; we just lack a more specific wire * reason) — rather than throwing into the SDK, which would reject an unknown diff --git a/packages/ui/acp/src/index.ts b/packages/ui/acp/src/index.ts index 754b1750be..b3ca2d3bf1 100644 --- a/packages/ui/acp/src/index.ts +++ b/packages/ui/acp/src/index.ts @@ -22,7 +22,7 @@ * `agent→sessionId` reverse map for O(1) demux of `agent/*` events; every * `session/event` and `agent/*` event is routed strictly to its owning session * record, so two sessions streaming at once never interleave their - * `session/update` notifications. The `tools/execute` permission gate is + * `session/update` notifications. The `tools/pre-execute` permission gate is * deferred — see the TODO(rfc010-permission-gate) note below. * * stdout is the protocol: this plugin must run in an example that loads NO From 60418a5779f073bfbfa19191e8ac095afe24edf9 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 20:48:07 +0800 Subject: [PATCH 09/47] =?UTF-8?q?docs(events):=20address=20Codex=20round-2?= =?UTF-8?q?=20=E2=80=94=20purge=20remaining=20single-waterfall=20reference?= =?UTF-8?q?s?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex's confirmation review confirmed blocker #1 (post-execute mutation) fixed and the guard real, but found three current-state references the first sweep missed (they phrase the seam without the literal "tools/execute" string): - packages/core/tools/src/index.ts: the ToolExecution JSDoc said "flows through the execution waterfall" → now names the pre-execute → dispatch → post-execute pipeline. - packages/core/tools/src/schema.ts: ToolArgsError's JSDoc said "the registry's execute waterfall catches it" → "the registry's execution pipeline". - AGENTS.md repo layout still described tools/ as "tool registry + tools/execute waterfall" → "tools/pre-execute/post-execute pipeline". Doc-comment-only; no behavior change. --- AGENTS.md | 2 +- packages/core/tools/src/index.ts | 2 +- packages/core/tools/src/schema.ts | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/AGENTS.md b/AGENTS.md index db20d3f7e4..833aeeea45 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -59,7 +59,7 @@ packages/ Harness packages, grouped by role at packages///. core/ product API spine session/ event-sourced session log + in-memory store system-prompt/ prompt-section + tool-schema assembly registry - tools/ tool registry + tools/execute waterfall + tools/ tool registry + tools/pre-execute/post-execute pipeline agent/ Agent interface, registry, agent/* event vocabulary agent-loop/ THE concrete plugin: ReactLoopAgent + the loop driver agent-core/ bundle plugin: the providerless/executor-less/UI-less spine diff --git a/packages/core/tools/src/index.ts b/packages/core/tools/src/index.ts index a8f881c214..b08403503e 100644 --- a/packages/core/tools/src/index.ts +++ b/packages/core/tools/src/index.ts @@ -224,7 +224,7 @@ export interface ToolResult { isError: boolean } -/** One pending tool call, as it flows through the execution waterfall. */ +/** One pending tool call, as it flows through the execution pipeline (`tools/pre-execute` → dispatch → `tools/post-execute`). */ export interface ToolExecution { callId: CallId name: string diff --git a/packages/core/tools/src/schema.ts b/packages/core/tools/src/schema.ts index b717eabf9a..05197986bd 100644 --- a/packages/core/tools/src/schema.ts +++ b/packages/core/tools/src/schema.ts @@ -182,7 +182,7 @@ export function schemaSpecToJsonSchema(spec: SchemaSpec): JsonSchemaObject { /** * Thrown by a {@link defineTool} tool when the model-generated arguments don't * match the declared {@link SchemaSpec}. Extends {@link HarnessError} - * (`code: 'INVALID_ARGS'`); the registry's execute waterfall catches it and + * (`code: 'INVALID_ARGS'`); the registry's execution pipeline catches it and * returns an `isError` ToolExecutionResult carrying the structured error, so * the model can self-correct and downstream plugins can route on the code. */ From 7cc7b9cf7f5fb6aa46e228418b8d548e43e843b2 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 21:29:08 +0800 Subject: [PATCH 10/47] feat(subagent): enrich subagent/start + subagent/end lifecycle events (observe-only) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A hooks bridge translating SubagentStart/SubagentStop needs to know WHICH kind of subagent ran and WHAT it produced — Claude Code's hooks carry subagent_type and the child's final message. Enrich the existing lifecycle emits to match, observe-only: - agentType: an optional caller-supplied subagent-kind label (CC's subagent_type), added to SubagentStartRequest and carried VERBATIM onto both subagent/start (SubagentRunInfo) and subagent/end (SubagentRunEndInfo). The seam never interprets it. dsh-tool-subagent threads it from a new optional Config.agentType, so a deployment exposing multiple subagent kinds (one tool load per kind) labels each. - lastAssistantMessage: the child's final output (SubagentResult.output), added to SubagentRunEndInfo on the settle path so an observer sees what the subagent produced without holding the run. Absent on the reject path (no result produced). Strictly observe-only: both events stay plain emits (subagent/end fires from a detached .then and awaits no listener). A control-flow subagent/end (awaited waterfall returning a decision) would need the emit→waterfall reshape, awaiting listeners before settling, and a provider resume capability — deferred to the background/steering redesign (FIXME(subagent-continuation) anchors it). RFC: implemented/feature/2026-06-30-subagent-observe-enrich.md. --- docs/cordis-catalog/events-and-services.md | 6 +- docs/core-data-structures/subagent.md | 3 +- docs/rfc/README.md | 1 + .../2026-06-30-subagent-observe-enrich.md | 29 +++++++ packages/subagent/subagent/README.md | 2 + packages/subagent/subagent/src/index.ts | 44 +++++++++-- packages/subagent/subagent/src/types.ts | 9 +++ .../subagent/subagent/tests/service.spec.ts | 76 +++++++++++++++++++ packages/subagent/tool-subagent/README.md | 1 + packages/subagent/tool-subagent/src/index.ts | 10 +++ .../tool-subagent/tests/tool-subagent.spec.ts | 54 +++++++++++++ 11 files changed, 225 insertions(+), 10 deletions(-) create mode 100644 docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index a8afdbd5f1..3a477e171a 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -241,7 +241,7 @@ A subagent run settled — emitted when SubagentRun.result resolves (any stop re 'subagent/end'(info: SubagentRunEndInfo): void ``` -Source: [`packages/subagent/subagent/src/index.ts:65`](../../packages/subagent/subagent/src/index.ts) +Source: [`packages/subagent/subagent/src/index.ts:75`](../../packages/subagent/subagent/src/index.ts) #### `subagent/start` — emit @@ -251,7 +251,7 @@ A subagent run started — emitted after the provider is resolved and its capabi 'subagent/start'(info: SubagentRunInfo): void ``` -Source: [`packages/subagent/subagent/src/index.ts:59`](../../packages/subagent/subagent/src/index.ts) +Source: [`packages/subagent/subagent/src/index.ts:69`](../../packages/subagent/subagent/src/index.ts) ### `system-prompt/*` @@ -455,7 +455,7 @@ list(): string[] start(name: string, request: SubagentStartRequest): SubagentRun ``` -Source: [`packages/subagent/subagent/src/index.ts:103`](../../packages/subagent/subagent/src/index.ts) +Source: [`packages/subagent/subagent/src/index.ts:130`](../../packages/subagent/subagent/src/index.ts) ### `ctx.systemPrompt` — `SystemPrompt` diff --git a/docs/core-data-structures/subagent.md b/docs/core-data-structures/subagent.md index c64d370ff2..ca85830808 100644 --- a/docs/core-data-structures/subagent.md +++ b/docs/core-data-structures/subagent.md @@ -25,6 +25,7 @@ What a caller asks for when starting a subagent. The tool layer builds this from ```ts type-equiv interface SubagentStartRequest { prompt: ContentBlock[] + agentType?: string parent: Agent signal?: AbortSignal agentOptions?: AgentOptions @@ -85,7 +86,7 @@ interface SubagentProvider { } ``` -The service (`ctx.subagents`) emits `subagent/start` when a run begins and `subagent/end` when it settles (see the [events catalog](../cordis-catalog/events-and-services.md)). Both emits contain a thrown listener **per listener** (logged, never propagated): one bad subscriber can neither strand a live run, surface as an unhandled rejection on the detached settle hook, nor starve the listeners registered after it. +The service (`ctx.subagents`) emits `subagent/start` when a run begins and `subagent/end` when it settles (see the [events catalog](../cordis-catalog/events-and-services.md)). Both payloads carry the caller's optional `agentType` label (verbatim from the request — Claude Code's `subagent_type`); `subagent/end` additionally carries `lastAssistantMessage` (the child's final `output`) on the settle path, so an observer sees WHAT the subagent produced without holding the run (absent when the run rejected at the infrastructure level — no result was produced). These are **observe-only** enrichments: both events are plain `emit`s (the `subagent/end` fires from a detached `.then` after the result settles and awaits no listener), so a subscriber observes but cannot change the run. Both emits contain a thrown listener **per listener** (logged, never propagated): one bad subscriber can neither strand a live run, surface as an unhandled rejection on the detached settle hook, nor starve the listeners registered after it. ## In-process backends: depth and seed diff --git a/docs/rfc/README.md b/docs/rfc/README.md index a05a7d5c5c..632b63ff56 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -88,6 +88,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [ACP subagent backend (out-of-process delegation)](implemented/feature/2026-06-22-acp-subagent-backend.md) | 2026-06-22 | | [The `todo_write` tool — model task list as event-sourced session state](implemented/feature/2026-06-29-todo-write-tool.md) | 2026-06-29 | | [Interception seams — the typed-Decision surface a hook programs against](implemented/feature/2026-06-30-interception-seams.md) | 2026-06-30 | +| [Subagent lifecycle enrichment — agentType + lastAssistantMessage (observe-only)](implemented/feature/2026-06-30-subagent-observe-enrich.md) | 2026-06-30 | ### Simplification diff --git a/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md b/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md new file mode 100644 index 0000000000..46cf403666 --- /dev/null +++ b/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md @@ -0,0 +1,29 @@ +# RFC: Subagent lifecycle enrichment — agentType + lastAssistantMessage (observe-only) + +Status: implemented (accepted 2026-06-30) + + + +## Context + +The hooks subsystem ([interception seams RFC](2026-06-30-interception-seams.md)) lets a plugin observe and gate the agent at lifecycle points. Claude Code and Codex both expose **SubagentStart / SubagentStop** hooks, and CC's carry a `subagent_type` (which named subagent kind ran) and the subagent's final message. The harness already emits `subagent/start` and `subagent/end` lifecycle events ([the subagent capability-seam](2026-06-21-subagent-capability-seam.md)), but their payloads were minimal (`provider`, `id`, and on end `stopReason`) — not enough for a hooks bridge to report which KIND of subagent ran, or WHAT it produced, without separately reaching for the live run. + +This RFC enriches those two payloads. It is deliberately **observe-only**: no control-flow change, no waterfall, no `start()` restructure. A run-affecting subagent-stop decision (continuation, injection that changes the run) is a separate, larger redesign and stays out of scope. + +## Decision + +Add two pieces of information to the subagent lifecycle surface: + +1. **`agentType` — a caller-supplied subagent-kind label**, the harness analogue of CC's `subagent_type`. It is optional on `SubagentStartRequest`, carried VERBATIM onto both `subagent/start` (`SubagentRunInfo`) and `subagent/end` (`SubagentRunEndInfo`). The seam never interprets it. The model-facing `dsh-tool-subagent` tool threads it from a new optional `Config.agentType`, so a deployment that exposes multiple subagent kinds (one tool load per kind) labels each. Absent when the caller does not distinguish kinds (the spread omits the key — `exactOptionalPropertyTypes`-correct). + +2. **`lastAssistantMessage` — the child's final output**, added to `SubagentRunEndInfo`. On the settle path it is `SubagentResult.output` (so an observer sees WHAT the subagent produced without holding the run). On the REJECT path (an infrastructure fault where no `SubagentResult` was produced — the seam only knows `stopReason: 'error'`) it is absent. + +Both events stay plain **`emit`s**. `subagent/end` fires from a detached `.then` on `run.result` and awaits no listener, so it is genuinely observe-only by construction — a `subagent/start` listener can still reach the live child via `ctx.agents.get(info.id)` and `inject()` into it; a `subagent/end` listener can only observe (the run has settled). Per-listener containment (already in place) keeps one bad subscriber from stranding a live run or surfacing as an unhandled rejection on the detached settle hook. + +## Why observe-only, and what is deferred + +A control-flow `subagent/end` (an awaited waterfall returning a stop/continue decision, like the other interception seams) would require: reshaping `subagent/end` from emit to waterfall, restructuring `SubagentService.start` to await listeners before settling, and implementing the `resume` capability in the in-process provider so a "continue" can actually re-run the child. That belongs to the background/steering subagent redesign the [capability-seam RFC](2026-06-21-subagent-capability-seam.md) already defers (the same redesign that unifies long-running-tool handling across subagents and bash). This RFC ships the observe-only enrichment a hooks bridge needs today; `FIXME(subagent-continuation)` / `TODO` anchors mark where the control-flow version would land if and when that redesign happens. + +## Consequences + +A hooks bridge (or a native plugin) can now translate SubagentStart/SubagentStop faithfully: it reports `agentType`, matches its hook config on it, and forwards the child's `lastAssistantMessage` to a SubagentStop handler — all by subscribing to the existing emits, no new control-flow surface. The vocabulary addition is documented in [docs/core-data-structures/subagent.md](../../../core-data-structures/subagent.md) (the `SubagentStartRequest` type-equiv block + the events prose) and the two subagent READMEs; the catalog is regenerated. No production behavior changes — the events fire exactly as before, with two more (optional) fields on their payloads — so no snapshot or e2e change is needed. diff --git a/packages/subagent/subagent/README.md b/packages/subagent/subagent/README.md index 57862ca8ab..7d6c58af3c 100644 --- a/packages/subagent/subagent/README.md +++ b/packages/subagent/subagent/README.md @@ -32,6 +32,8 @@ Unlike the bash seam (one executor per context, second load throws), **multiple `provider.start(request)` returns a `SubagentRun`: a handle with a `result` promise, `cancel()`, `dispose()`, and the optional runtime methods. `result` resolves with a `SubagentResult` (`output`, optional `structured`, `stopReason`) — it does **not** reject on a child-level failure (a model/transport failure resolves with `stopReason: 'error'`), so the consumer maps a non-`completed` reason to an `isError` tool result. The consumer MUST `dispose()` on every path (success, error, abort) to reach child quiescence and avoid leaking an idle child / session. +The service emits `subagent/start` (payload `SubagentRunInfo`) and `subagent/end` (payload `SubagentRunEndInfo`) around the run — both **observe-only** (plain `emit`s; `subagent/end` fires from a detached `.then` and awaits no listener). Both payloads carry the request's optional `agentType` label (Claude Code's `subagent_type`, verbatim — the seam never interprets it); `subagent/end` additionally carries `lastAssistantMessage` (the child's final `output`) on the settle path, absent when the run rejected at the infrastructure level. A `subagent/start` listener can still reach the live child via `ctx.agents.get(info.id)`; a `subagent/end` listener can only observe (the run has settled). Any run-affecting decision (continuation, injection that changes the run) is out of scope for this observe-only surface. + ## Scope (first cut) The consumer collects **synchronously**: it starts a run and awaits `result`. Steering (`sendMessage`) is part of the contract but intentionally unused. Background / poll / spill semantics are deferred to a future redesign unifying long-running-tool handling across subagents and bash. See the RFC: [docs/rfc/implemented/feature/2026-06-21-subagent-capability-seam.md](../../../docs/rfc/implemented/feature/2026-06-21-subagent-capability-seam.md). diff --git a/packages/subagent/subagent/src/index.ts b/packages/subagent/subagent/src/index.ts index 356ad60a00..916c53e759 100644 --- a/packages/subagent/subagent/src/index.ts +++ b/packages/subagent/subagent/src/index.ts @@ -20,11 +20,21 @@ * semantics are deferred to a future redesign that unifies long-running-tool * handling across subagents and bash. * + * The `subagent/start` / `subagent/end` lifecycle events carry an enriched but + * OBSERVE-ONLY payload (`agentType`, and on end `lastAssistantMessage`) — see + * `docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md`. + * FIXME(subagent-continuation): a control-flow `subagent/end` (an awaited + * waterfall returning a stop/continue decision, like the other interception + * seams) would require reshaping this emit into a waterfall, awaiting listeners + * before settling, and a `resume` capability on the in-process provider — part + * of the deferred background/steering redesign, NOT this observe-only cut. + * * @module @deepseek-ai/dsh-subagent */ import { Context, Service } from 'cordis' import { HarnessError } from '@deepseek-ai/dsh-llm' +import type { ContentBlock } from '@deepseek-ai/dsh-llm' import type { AgentId } from '@deepseek-ai/dsh-agent' import type { SubagentCapabilities, @@ -72,6 +82,13 @@ export interface SubagentRunInfo { provider: string /** The child agent's id. */ id: AgentId + /** + * The caller's subagent-kind label, carried verbatim from + * {@link SubagentStartRequest.agentType} (Claude Code's `subagent_type`). + * Absent when the caller did not supply one. An observer (a hooks bridge, + * a UI) reports or matches on it; the seam never interprets it. + */ + agentType?: string } /** Outcome detail for a settled subagent run (the `subagent/end` payload). */ @@ -80,8 +97,18 @@ export interface SubagentRunEndInfo { provider: string /** The child agent's id. */ id: AgentId + /** The caller's subagent-kind label (see {@link SubagentRunInfo.agentType}). */ + agentType?: string /** The terminal stop reason. */ stopReason: SubagentResult['stopReason'] + /** + * The child's final assistant output ({@link SubagentResult.output}), carried + * onto the end event so an observer sees WHAT the subagent produced without + * holding the run. Absent when the run rejected at the infrastructure level + * (no {@link SubagentResult} was produced — the seam only knows `stopReason: + * 'error'`). + */ + lastAssistantMessage?: ContentBlock[] } /** @@ -160,17 +187,22 @@ export class SubagentService extends Service { // acceptable. `ctx.emit` halts the dispatch on the first throw, so a single // surrounding try/catch is not enough — each listener is invoked and // contained individually. - this.emitLifecycle('subagent/start', { provider: name, id: run.id }) + // Carry the caller's subagent-kind label verbatim onto both lifecycle events + // (absent when not supplied — the spread omits the key for exactOptionalPropertyTypes). + const agentType = request.agentType !== undefined ? { agentType: request.agentType } : {} + this.emitLifecycle('subagent/start', { provider: name, id: run.id, ...agentType }) // Emit `subagent/end` when the run settles. The result promise does not // reject on a child-level failure (it resolves with stopReason 'error'), // so a rejection here is an infrastructure fault — surface its stop reason // as 'error' for the telemetry event without swallowing the rejection - // (the consumer still observes it via `run.result`). Per-listener - // containment also keeps a thrown `subagent/end` listener from becoming an - // unhandled rejection on this detached `.then`. + // (the consumer still observes it via `run.result`). On the resolve path the + // child's final output rides on the event (lastAssistantMessage); on the + // reject path there is no SubagentResult, so only the stop reason is known. + // Per-listener containment also keeps a thrown `subagent/end` listener from + // becoming an unhandled rejection on this detached `.then`. void run.result.then( - (result) => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, stopReason: result.stopReason }) }, - () => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, stopReason: 'error' }) }, + (result) => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: result.stopReason, lastAssistantMessage: result.output }) }, + () => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: 'error' }) }, ) return run } diff --git a/packages/subagent/subagent/src/types.ts b/packages/subagent/subagent/src/types.ts index fb60d5667c..55ef04a8a9 100644 --- a/packages/subagent/subagent/src/types.ts +++ b/packages/subagent/subagent/src/types.ts @@ -40,6 +40,15 @@ export interface SubagentCapabilities { export interface SubagentStartRequest { /** The task/prompt for the child agent (a user message in the child session). */ prompt: ContentBlock[] + /** + * Optional caller-supplied LABEL for the kind of subagent (e.g. `code-reviewer`, + * `researcher`) — the harness analogue of Claude Code's `subagent_type`. The + * seam does not interpret it; it is carried verbatim onto the `subagent/start` + * and `subagent/end` lifecycle events so an observer (a hooks bridge, a UI) can + * report or match on which kind of subagent ran. Absent when the caller does + * not distinguish subagent kinds. + */ + agentType?: string /** * The spawning ("parent") agent — the one whose tool call started this * subagent. REQUIRED: in-process backends read `parent.session.header` for diff --git a/packages/subagent/subagent/tests/service.spec.ts b/packages/subagent/subagent/tests/service.spec.ts index 6876c6cd80..e23ae4ff3b 100644 --- a/packages/subagent/subagent/tests/service.spec.ts +++ b/packages/subagent/subagent/tests/service.spec.ts @@ -173,6 +173,82 @@ describe('SubagentService', () => { expect(ended).toHaveBeenCalledWith(expect.objectContaining({ provider: 'events', id: run.id, stopReason: 'completed' })) }) + it('carries agentType (from the request) onto both lifecycle events, and lastAssistantMessage onto end', async () => { + const ctx = new Context() + await ctx.plugin(SubagentService) + ctx.subagents.registerProvider(new StubProvider( + 'enriched', + ALL_CAPS, + { output: [{ type: 'text', text: 'the child answer' }], stopReason: 'completed' }, + )) + + const started = vi.fn() + const ended = vi.fn() + ctx.on('subagent/start', started) + ctx.on('subagent/end', ended) + + const run = ctx.subagents.start('enriched', baseRequest({ agentType: 'code-reviewer' })) + expect(started).toHaveBeenCalledWith(expect.objectContaining({ provider: 'enriched', id: run.id, agentType: 'code-reviewer' })) + + await run.result + await Promise.resolve() + expect(ended).toHaveBeenCalledWith(expect.objectContaining({ + provider: 'enriched', + id: run.id, + agentType: 'code-reviewer', + stopReason: 'completed', + lastAssistantMessage: [{ type: 'text', text: 'the child answer' }], + })) + }) + + it('omits agentType when the request supplied none', async () => { + const ctx = new Context() + await ctx.plugin(SubagentService) + ctx.subagents.registerProvider(new StubProvider('plain')) + + const started = vi.fn() + const ended = vi.fn() + ctx.on('subagent/start', started) + ctx.on('subagent/end', ended) + + const run = ctx.subagents.start('plain', baseRequest()) + await run.result + await Promise.resolve() + + const startInfo = started.mock.calls[0]![0] as Record + const endInfo = ended.mock.calls[0]![0] as Record + expect('agentType' in startInfo).toBe(false) + expect('agentType' in endInfo).toBe(false) + // lastAssistantMessage IS present on a resolved end (the child's output). + expect(endInfo.lastAssistantMessage).toEqual([{ type: 'text', text: 'ok' }]) + }) + + it('omits lastAssistantMessage on the reject path (no SubagentResult was produced)', async () => { + const ctx = new Context() + await ctx.plugin(SubagentService) + ctx.subagents.registerProvider({ + name: 'rej', + capabilities: NO_CAPS, + start: () => ({ + id: AgentId('rej-child'), + result: Promise.reject(new Error('infra fault')), + cancel() {}, + dispose: async () => {}, + }), + }) + + const ended = vi.fn() + ctx.on('subagent/end', ended) + const run = ctx.subagents.start('rej', baseRequest({ agentType: 'researcher' })) + await run.result.catch(() => {}) + await Promise.resolve() + + const endInfo = ended.mock.calls[0]![0] as Record + expect(endInfo.stopReason).toBe('error') + expect(endInfo.agentType).toBe('researcher') // agentType still carried on reject + expect('lastAssistantMessage' in endInfo).toBe(false) // but no output exists + }) + it('emits subagent/end with stopReason "error" when the run result promise rejects', async () => { const ctx = new Context() await ctx.plugin(SubagentService) diff --git a/packages/subagent/tool-subagent/README.md b/packages/subagent/tool-subagent/README.md index 1bb48f29ff..996e44d96e 100644 --- a/packages/subagent/tool-subagent/README.md +++ b/packages/subagent/tool-subagent/README.md @@ -11,6 +11,7 @@ This plugin binds to **exactly one** provider (`Config.provider`). The model see | `provider` (required) | The `ctx.subagents` provider name to start runs on (`spawn`, `fork`, `acp`, …). | | `toolName` | The model-facing tool name to register (default `subagent`). Set a distinct value per load when exposing multiple providers, e.g. `subagent` + `subagent_acp`. | | `agentOptions` | Default per-child `{ model?, systemPrompt? }` applied to every spawned child. | +| `agentType` | Optional subagent-kind label (Claude Code's `subagent_type`) stamped on every run's `subagent/start`/`subagent/end` events, so an observer (a hooks bridge, a UI) can report or match on which kind ran. Set a distinct value per load when exposing multiple subagent kinds. | ## Lifecycle (synchronous collect) diff --git a/packages/subagent/tool-subagent/src/index.ts b/packages/subagent/tool-subagent/src/index.ts index 05490127ea..cb92035e88 100644 --- a/packages/subagent/tool-subagent/src/index.ts +++ b/packages/subagent/tool-subagent/src/index.ts @@ -48,6 +48,14 @@ export interface Config { * spawned child. Omitted fields fall back to the child loop's own defaults. */ agentOptions?: AgentOptions + /** + * Optional subagent-kind LABEL stamped on every run this tool starts (Claude + * Code's `subagent_type`). Carried onto the `subagent/start`/`subagent/end` + * lifecycle events so an observer can report or match on which kind of + * subagent ran. A deployment that exposes multiple subagent kinds (one tool + * load per kind) sets a distinct `agentType` per load; omit when undifferentiated. + */ + agentType?: string } export const Config: z = z.object({ @@ -57,6 +65,7 @@ export const Config: z = z.object({ model: z.string(), systemPrompt: z.string(), }), + agentType: z.string(), }) /** @@ -128,6 +137,7 @@ export function apply(ctx: Context, config: Config): void { parent, ...exec.signal ? { signal: exec.signal } : {}, ...config.agentOptions ? { agentOptions: config.agentOptions } : {}, + ...config.agentType !== undefined ? { agentType: config.agentType } : {}, } const run: SubagentRun = ctx.subagents.start(config.provider, request) diff --git a/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts b/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts index 2f40cd6f8c..0b088b65db 100644 --- a/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts +++ b/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts @@ -153,6 +153,60 @@ describe('dsh-tool-subagent', () => { expect(seen?.agentOptions).toEqual({ model: 'child-model', systemPrompt: 'be terse' }) }) + it('forwards a configured agentType into the start request (observed on the lifecycle events)', async () => { + let seen: { agentType?: string } | undefined + const starts: { agentType?: string }[] = [] + const ctx = new Context() + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(SubagentService) + ctx.on('subagent/start', info => void starts.push(info)) + ctx.subagents.registerProvider({ + name: 'typed', + capabilities: { outputSchema: false, depthLimit: false, toolFilter: false }, + start: (request) => { + seen = request + return { + id: AgentId('typed-child'), + result: Promise.resolve({ output: [{ type: 'text', text: 'ok' }], stopReason: 'completed' as const }), + cancel() {}, + dispose: async () => {}, + } + }, + }) + await ctx.plugin(tool, { provider: 'typed', agentType: 'code-reviewer' }) + + await callSubagent(ctx, { description: 'd', prompt: 'p' }) + // The config agentType reaches the request, and the service stamps it on the event. + expect(seen?.agentType).toBe('code-reviewer') + expect(starts[0]?.agentType).toBe('code-reviewer') + }) + + it('omits agentType from the request when none is configured', async () => { + let seen: { agentType?: string } | undefined + const ctx = new Context() + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(SubagentService) + ctx.subagents.registerProvider({ + name: 'untyped', + capabilities: { outputSchema: false, depthLimit: false, toolFilter: false }, + start: (request) => { + seen = request + return { + id: AgentId('untyped-child'), + result: Promise.resolve({ output: [{ type: 'text', text: 'ok' }], stopReason: 'completed' as const }), + cancel() {}, + dispose: async () => {}, + } + }, + }) + await ctx.plugin(tool, { provider: 'untyped' }) + + await callSubagent(ctx, { description: 'd', prompt: 'p' }) + expect(seen !== undefined && 'agentType' in seen).toBe(false) + }) + it('defaults toolName and omits agentOptions when apply() is called directly (schema bypass)', async () => { // `ctx.plugin` validates+defaults config first (toolName→'subagent', the // agentOptions object→{}), so the runtime `?? 'subagent'` fallback and the From 93106b87b4cbed9dcbf7905404620c3ca96f264b Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Tue, 30 Jun 2026 21:52:16 +0800 Subject: [PATCH 11/47] fix(subagent): deep-clone lastAssistantMessage onto subagent/end (observe-only) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex review caught an observe-only violation: the subagent/end emit fires from a detached `.then` registered BEFORE start() returns — so before the caller's own `await run.result` continuation runs. Carrying `result.output` by reference let a mutating subagent/end listener corrupt the SubagentResult.output the caller/tool then consumes. structuredClone() makes the event a read-only snapshot. Added a regression test that mutates the event's array and asserts the caller's result is untouched; proven to fail red without the clone. Updated the RFC + READMEs to note the clone is load-bearing for the observe-only guarantee. --- .../2026-06-30-subagent-observe-enrich.md | 2 +- packages/subagent/subagent/README.md | 2 +- packages/subagent/subagent/src/index.ts | 10 ++++++- .../subagent/subagent/tests/service.spec.ts | 28 +++++++++++++++++++ 4 files changed, 39 insertions(+), 3 deletions(-) diff --git a/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md b/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md index 46cf403666..a1893ed99c 100644 --- a/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md +++ b/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md @@ -16,7 +16,7 @@ Add two pieces of information to the subagent lifecycle surface: 1. **`agentType` — a caller-supplied subagent-kind label**, the harness analogue of CC's `subagent_type`. It is optional on `SubagentStartRequest`, carried VERBATIM onto both `subagent/start` (`SubagentRunInfo`) and `subagent/end` (`SubagentRunEndInfo`). The seam never interprets it. The model-facing `dsh-tool-subagent` tool threads it from a new optional `Config.agentType`, so a deployment that exposes multiple subagent kinds (one tool load per kind) labels each. Absent when the caller does not distinguish kinds (the spread omits the key — `exactOptionalPropertyTypes`-correct). -2. **`lastAssistantMessage` — the child's final output**, added to `SubagentRunEndInfo`. On the settle path it is `SubagentResult.output` (so an observer sees WHAT the subagent produced without holding the run). On the REJECT path (an infrastructure fault where no `SubagentResult` was produced — the seam only knows `stopReason: 'error'`) it is absent. +2. **`lastAssistantMessage` — the child's final output**, added to `SubagentRunEndInfo`. On the settle path it is a DEEP CLONE of `SubagentResult.output` (so an observer sees WHAT the subagent produced without holding the run). On the REJECT path (an infrastructure fault where no `SubagentResult` was produced — the seam only knows `stopReason: 'error'`) it is absent. The clone is load-bearing for observe-only: the `subagent/end` emit fires from a detached `.then` registered *before* `start()` returns, i.e. before the caller's own `await run.result` continuation — handing listeners the same array reference would let a mutating listener corrupt the caller's `SubagentResult.output`. `structuredClone` makes the event a read-only view (a regression test mutates the event's array and asserts the caller's result is untouched). Both events stay plain **`emit`s**. `subagent/end` fires from a detached `.then` on `run.result` and awaits no listener, so it is genuinely observe-only by construction — a `subagent/start` listener can still reach the live child via `ctx.agents.get(info.id)` and `inject()` into it; a `subagent/end` listener can only observe (the run has settled). Per-listener containment (already in place) keeps one bad subscriber from stranding a live run or surfacing as an unhandled rejection on the detached settle hook. diff --git a/packages/subagent/subagent/README.md b/packages/subagent/subagent/README.md index 7d6c58af3c..6db26272c7 100644 --- a/packages/subagent/subagent/README.md +++ b/packages/subagent/subagent/README.md @@ -32,7 +32,7 @@ Unlike the bash seam (one executor per context, second load throws), **multiple `provider.start(request)` returns a `SubagentRun`: a handle with a `result` promise, `cancel()`, `dispose()`, and the optional runtime methods. `result` resolves with a `SubagentResult` (`output`, optional `structured`, `stopReason`) — it does **not** reject on a child-level failure (a model/transport failure resolves with `stopReason: 'error'`), so the consumer maps a non-`completed` reason to an `isError` tool result. The consumer MUST `dispose()` on every path (success, error, abort) to reach child quiescence and avoid leaking an idle child / session. -The service emits `subagent/start` (payload `SubagentRunInfo`) and `subagent/end` (payload `SubagentRunEndInfo`) around the run — both **observe-only** (plain `emit`s; `subagent/end` fires from a detached `.then` and awaits no listener). Both payloads carry the request's optional `agentType` label (Claude Code's `subagent_type`, verbatim — the seam never interprets it); `subagent/end` additionally carries `lastAssistantMessage` (the child's final `output`) on the settle path, absent when the run rejected at the infrastructure level. A `subagent/start` listener can still reach the live child via `ctx.agents.get(info.id)`; a `subagent/end` listener can only observe (the run has settled). Any run-affecting decision (continuation, injection that changes the run) is out of scope for this observe-only surface. +The service emits `subagent/start` (payload `SubagentRunInfo`) and `subagent/end` (payload `SubagentRunEndInfo`) around the run — both **observe-only** (plain `emit`s; `subagent/end` fires from a detached `.then` and awaits no listener). Both payloads carry the request's optional `agentType` label (Claude Code's `subagent_type`, verbatim — the seam never interprets it); `subagent/end` additionally carries `lastAssistantMessage` (a deep clone of the child's final `output`) on the settle path, absent when the run rejected at the infrastructure level. The clone keeps the surface observe-only: the end emit fires from a detached `.then` before the caller's `await run.result` resumes, so a shared reference would let a mutating listener corrupt the caller's result. A `subagent/start` listener can still reach the live child via `ctx.agents.get(info.id)`; a `subagent/end` listener can only observe (the run has settled). Any run-affecting decision (continuation, injection that changes the run) is out of scope for this observe-only surface. ## Scope (first cut) diff --git a/packages/subagent/subagent/src/index.ts b/packages/subagent/subagent/src/index.ts index 916c53e759..ec66118ec6 100644 --- a/packages/subagent/subagent/src/index.ts +++ b/packages/subagent/subagent/src/index.ts @@ -201,7 +201,15 @@ export class SubagentService extends Service { // Per-listener containment also keeps a thrown `subagent/end` listener from // becoming an unhandled rejection on this detached `.then`. void run.result.then( - (result) => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: result.stopReason, lastAssistantMessage: result.output }) }, + (result) => { + // Deep-clone the output onto the event: this detached `.then` runs BEFORE + // the caller's own `await run.result` continuation, so handing listeners + // the SAME array reference the caller consumes would let a mutating + // `subagent/end` listener corrupt the caller's SubagentResult.output — + // breaking the observe-only contract. A snapshot makes the event a + // read-only view, not a shared handle. + this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: result.stopReason, lastAssistantMessage: structuredClone(result.output) }) + }, () => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: 'error' }) }, ) return run diff --git a/packages/subagent/subagent/tests/service.spec.ts b/packages/subagent/subagent/tests/service.spec.ts index e23ae4ff3b..2e5a3ef8a7 100644 --- a/packages/subagent/subagent/tests/service.spec.ts +++ b/packages/subagent/subagent/tests/service.spec.ts @@ -223,6 +223,34 @@ describe('SubagentService', () => { expect(endInfo.lastAssistantMessage).toEqual([{ type: 'text', text: 'ok' }]) }) + it('observe-only: a subagent/end listener mutating lastAssistantMessage cannot corrupt the caller\'s result', async () => { + // The subagent/end emit fires from a detached `.then` registered before + // start() returns — i.e. BEFORE the caller's own `await run.result` + // continuation. If the event shared the result.output reference, a mutating + // listener would change the SubagentResult the caller consumes. The service + // deep-clones output onto the event, so the listener mutates only its copy. + const ctx = new Context() + await ctx.plugin(SubagentService) + ctx.subagents.registerProvider(new StubProvider( + 'clone', + ALL_CAPS, + { output: [{ type: 'text', text: 'original' }], stopReason: 'completed' }, + )) + + ctx.on('subagent/end', (info) => { + // A hostile/buggy listener reaches in and mutates the event's array. + const blocks = info.lastAssistantMessage + if (blocks?.[0]?.type === 'text') blocks[0].text = 'HIJACKED' + blocks?.push({ type: 'text', text: 'injected' }) + }) + + const run = ctx.subagents.start('clone', baseRequest()) + const result = await run.result + await Promise.resolve() // let the detached settle hook (and its listener) run + // The caller's result.output is untouched by the listener's mutation. + expect(result.output).toEqual([{ type: 'text', text: 'original' }]) + }) + it('omits lastAssistantMessage on the reject path (no SubagentResult was produced)', async () => { const ctx = new Context() await ctx.plugin(SubagentService) From 65165b5d542e6ff987e4d919d7f5d2f1fcaeaa2b Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 00:38:06 +0800 Subject: [PATCH 12/47] =?UTF-8?q?feat(hooks):=20dsh-hook-protocol=20?= =?UTF-8?q?=E2=80=94=20shared=20Claude=20Code=20/=20Codex=20hook=20wire-pr?= =?UTF-8?q?otocol=20core?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The two hook bridges (dsh-hooks-claude, dsh-hooks-codex) would otherwise duplicate the bulk of the protocol — Codex deliberately reimplements a SUBSET of the Claude Code protocol (same hooks.json shape, exit-code/stdout contract, command-hook model). This library holds the genuinely-identical primitives; each bridge owns only what differs (per-event stdin payload, env/substitution, decision mapping). New packages/hooks/ group; hook-protocol is a LIBRARY (no plugin, registers/injects nothing): - matcher: matchesMatcher(pattern, query, mode) — the one dialect axis collapsed to a mode param (claude = literal-or-regex with pipe alternation; codex = always unanchored regex). Match-all on absent/''/'*'; invalid regex matches nothing. - codec: parseHookOutput(exit, stdout, stderr) → dialect-neutral HookOutput. Exit 0 → lenient JSON; exit 2 → blocking error (stderr = reason, surfaced as decision:'block'); other → non-blocking. Parses the CC superset (continue/stopReason/decision/hookSpecificOutput.{permissionDecision, additionalContext,updatedInput}/systemMessage); permissionDecision overrides the legacy top-level decision. - runner: runHook(bash, hook, opts, now) — runs a command hook via ctx.bash (stdin payload + trusted-plugin env), honors timeoutSec, never throws (executor reject → non-blocking-error HookOutput). Injected clock for testable durations. - merge: mergeHookOutputs — most-restrictive fold (deny>ask>allow, sticky stop, block reasons joined, context/system-messages accumulated). - hook/* session events (declaration-merged into SessionEventMap, log-only like compact/*) + appendHookInvoked/appendHookResult helpers. updatedInput is parsed but NOT honored (deferred pre-tool-input-rewrite RFC); a bridge logs+warns. 47 unit tests at per-file 100% (matcher per-mode, codec per exit-code/field, runner plumbing w/ stub executor, merge precedence, hook/* helpers). RFC: implemented/feature/2026-06-30-hook-protocol-lib.md. --- AGENTS.md | 4 + docs/core-data-structures/session.md | 2 +- docs/module-graph.md | 3 + docs/rfc/README.md | 1 + .../feature/2026-06-30-hook-protocol-lib.md | 32 +++++ packages/README.md | 2 + packages/hooks/README.md | 11 ++ packages/hooks/hook-protocol/README.md | 35 +++++ packages/hooks/hook-protocol/package.json | 34 +++++ packages/hooks/hook-protocol/src/codec.ts | 129 +++++++++++++++++ packages/hooks/hook-protocol/src/events.ts | 72 ++++++++++ packages/hooks/hook-protocol/src/index.ts | 38 +++++ packages/hooks/hook-protocol/src/matcher.ts | 49 +++++++ packages/hooks/hook-protocol/src/merge.ts | 109 ++++++++++++++ packages/hooks/hook-protocol/src/runner.ts | 91 ++++++++++++ packages/hooks/hook-protocol/src/types.ts | 131 +++++++++++++++++ .../hooks/hook-protocol/tests/codec.spec.ts | 106 ++++++++++++++ .../hooks/hook-protocol/tests/events.spec.ts | 61 ++++++++ .../hooks/hook-protocol/tests/matcher.spec.ts | 58 ++++++++ .../hooks/hook-protocol/tests/merge.spec.ts | 82 +++++++++++ .../hooks/hook-protocol/tests/runner.spec.ts | 134 ++++++++++++++++++ packages/hooks/hook-protocol/tsconfig.json | 24 ++++ pnpm-lock.yaml | 12 ++ tsconfig.base.json | 1 + tsconfig.build.json | 3 +- tsconfig.json | 3 +- 26 files changed, 1224 insertions(+), 3 deletions(-) create mode 100644 docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md create mode 100644 packages/hooks/README.md create mode 100644 packages/hooks/hook-protocol/README.md create mode 100644 packages/hooks/hook-protocol/package.json create mode 100644 packages/hooks/hook-protocol/src/codec.ts create mode 100644 packages/hooks/hook-protocol/src/events.ts create mode 100644 packages/hooks/hook-protocol/src/index.ts create mode 100644 packages/hooks/hook-protocol/src/matcher.ts create mode 100644 packages/hooks/hook-protocol/src/merge.ts create mode 100644 packages/hooks/hook-protocol/src/runner.ts create mode 100644 packages/hooks/hook-protocol/src/types.ts create mode 100644 packages/hooks/hook-protocol/tests/codec.spec.ts create mode 100644 packages/hooks/hook-protocol/tests/events.spec.ts create mode 100644 packages/hooks/hook-protocol/tests/matcher.spec.ts create mode 100644 packages/hooks/hook-protocol/tests/merge.spec.ts create mode 100644 packages/hooks/hook-protocol/tests/runner.spec.ts create mode 100644 packages/hooks/hook-protocol/tsconfig.json diff --git a/AGENTS.md b/AGENTS.md index 833aeeea45..020447fe7a 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -77,6 +77,10 @@ packages/ Harness packages, grouped by role at packages///. tool-todo/ model-facing todo_write tool: writes the whole task list to the session log (todo/write), rendered as a stdio checklist / ACP plan + hooks/ hook bridges + shared wire protocol + hook-protocol/ shared Claude Code / Codex hook wire-protocol core (library, + not a plugin): matcher primitive, exit-code/stdout codec, + runHook (via ctx.bash), most-restrictive merge, hook/* events session-persistence/ persistence capability family session-persistence/ durable persistence seam + write coordinator session-persistence-jsonl/ JSONL-sidecar backend diff --git a/docs/core-data-structures/session.md b/docs/core-data-structures/session.md index 21c92612f2..eb323dcd3e 100644 --- a/docs/core-data-structures/session.md +++ b/docs/core-data-structures/session.md @@ -6,7 +6,7 @@ Source: [`packages/core/session/src/types.ts`](../../packages/core/session/src/t ## `SessionEventMap` — the event vocabulary -The append-only event types. Merge-extensible: a plugin declares extra event types via declaration merging — e.g. the [compaction seam](compaction.md) adds `compact/start` / `compact/summary` / `compact/end`. +The append-only event types. Merge-extensible: a plugin declares extra event types via declaration merging — e.g. the [compaction seam](compaction.md) adds `compact/start` / `compact/summary` / `compact/end`, and `@deepseek-ai/dsh-hook-protocol` adds log-only `hook/invoked` / `hook/result` provenance for a hook bridge. Like `compact/*`, these are NOT `SurfaceEventType`s (no `surfaceOp`). ```ts type-equiv interface SessionEventMap { diff --git a/docs/module-graph.md b/docs/module-graph.md index c2736abca1..3f64c7731e 100644 --- a/docs/module-graph.md +++ b/docs/module-graph.md @@ -20,6 +20,8 @@ graph TD agent --> session compact --> llm compact --> session + hook-protocol --> bash + hook-protocol --> session llm-replay --> llm llm-replay --> session session-persistence --> session @@ -107,6 +109,7 @@ graph TD | `system-prompt` | `llm` | | `agent` | `brand`, `llm`, `session` | | `compact` | `llm`, `session` | +| `hook-protocol` | `bash`, `session` | | `llm-replay` | `llm`, `session` | | `session-persistence` | `session` | | `invariants` | `agent`, `llm`, `session` | diff --git a/docs/rfc/README.md b/docs/rfc/README.md index 632b63ff56..fbeb6966e7 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -89,6 +89,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [The `todo_write` tool — model task list as event-sourced session state](implemented/feature/2026-06-29-todo-write-tool.md) | 2026-06-29 | | [Interception seams — the typed-Decision surface a hook programs against](implemented/feature/2026-06-30-interception-seams.md) | 2026-06-30 | | [Subagent lifecycle enrichment — agentType + lastAssistantMessage (observe-only)](implemented/feature/2026-06-30-subagent-observe-enrich.md) | 2026-06-30 | +| [dsh-hook-protocol — the shared Claude Code / Codex hook wire-protocol core](implemented/feature/2026-06-30-hook-protocol-lib.md) | 2026-06-30 | ### Simplification diff --git a/docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md b/docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md new file mode 100644 index 0000000000..ecb45ea2c3 --- /dev/null +++ b/docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md @@ -0,0 +1,32 @@ +# RFC: dsh-hook-protocol — the shared Claude Code / Codex hook wire-protocol core + +Status: implemented (accepted 2026-06-30) + + + +## Context + +The hooks subsystem ships two bridge plugins: one that runs a user's existing Claude Code (CC) hooks, one for Codex hooks. Studying the reference implementations (`~/repos/refs/claude-code`, `~/repos/refs/codex`) surfaced a decisive fact: **Codex deliberately reimplements a SUBSET of the CC hook protocol.** Its engine reads the same `hooks.json`, uses the same matcher-group shape, the same exit-code/structured-stdout output contract, and the same command-hook execution model — Codex's source even names the engine after Claude's and comments where it "intentionally diverges." So the two bridges would otherwise duplicate the bulk of the protocol. + +This RFC introduces `@deepseek-ai/dsh-hook-protocol`, a **library** (not a plugin — it registers and injects nothing) holding the genuinely-identical primitives both bridges build on. The split between shared and per-dialect is the design's center of gravity. + +## Decision + +A new `packages/hooks/` group with `hook-protocol` as a pure library. It owns four primitive families and the `hook/*` session events; each bridge (PR-F) owns what genuinely differs. + +**Shared (here):** +- **Matcher** — `matchesMatcher(pattern, query, mode)`. The ONE axis the dialects differ on is collapsed to the `mode` parameter: `claude` treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` is always an unanchored regex. Match-all on absent/`''`/`'*'`; an invalid regex matches nothing (never throws into the loop). +- **Execution** — `runHook(bash, hook, options, now)`. Runs a command hook through the `ctx.bash` seam rather than a bespoke `spawn`: the executor already provides the scrubbed-but-overridable env, process-group kills, and timeout the protocol needs, and `dsh-bash`'s `stdin`/`env` fields (added in the bash-seam PR for exactly this) are the trusted-plugin surface an in-process bridge is allowed to use. It serializes the bridge-built payload to stdin (trailing newline iff CC), honors the hook's `timeoutSec`, and never throws (an executor rejection becomes a non-blocking-error `HookOutput`). +- **Decode** — `parseHookOutput(exit, stdout, stderr)`, the exit-code + structured-stdout codec, producing a dialect-neutral `HookOutput`. Exit `0` → lenient JSON parse of stdout; exit `2` → blocking error with `stderr` as the reason (surfaced as `decision: 'block'` so no caller needs a separate exit-code branch); other → non-blocking error. Parses the full CC superset (`continue`/`stopReason`/`suppressOutput`/`decision`/`hookSpecificOutput.{permissionDecision,additionalContext,updatedInput}`/`systemMessage`); the bridge honors only the subset meaningful for its dialect. +- **Merge** — `mergeHookOutputs(outputs)`, folding multiple matched hooks into one most-restrictive `MergedHookOutcome`: permission precedence **deny > ask > allow**, halt sticky on the first `continue:false`, block reasons joined `\n\n`, context/system-messages accumulated in order. +- **`hook/*` session events** — `hook/invoked` / `hook/result`, declaration-merged into `SessionEventMap` (log-only, like `compact/*` — NOT `SurfaceEventType`s), with `appendHookInvoked`/`appendHookResult` helpers so the invoked/result pairing and turn-enclosure stay consistent across bridges. + +**Per-dialect (the bridges, PR-F):** building each event's stdin payload (CC's base+per-event field sets vs Codex's snake_case with `turn_id`/`model` extras), the dialect's env + `${CLAUDE_PLUGIN_ROOT}` substitution (CC) vs none (Codex), and mapping the neutral `HookOutput`/`MergedHookOutcome` onto the harness's seam-specific typed Decisions (`PreToolDecision`, `PromptDecision`, `ContinuationDecision`, `PostToolDecision`). + +### Why "shared core + per-dialect adapters", not "one parameterized engine" + +A single engine parameterized by a full `dialect` descriptor was considered and rejected. The payload construction and decision mapping are where the dialects genuinely diverge (different field names, different supported outputs, CC's env/substitution); folding those into a data-driven descriptor would make the *bridge* logic indirect — a reader of `dsh-hooks-claude` would have to chase a descriptor to see what payload it sends. Keeping the truly-identical primitives shared (matcher, codec, runner, merge, events) and letting each bridge write its own straightforward payload+mapping keeps each bridge readable standalone, at the cost of a little duplication in the payload shape. The primitives are the part where duplication would actually be dangerous (a divergent matcher or exit-code rule is a correctness bug); the payload is the part where explicitness beats sharing. + +## Consequences + +The two bridges (PR-F) become thin: parse the config file, pick a matcher mode, build the per-event payload+env, call `runHook` + `mergeHookOutputs`, map the outcome to a Decision, and append `hook/*`. The protocol's correctness-critical halves (matcher semantics, exit-code contract, merge precedence) live in one tested place — `hook-protocol` ships with heavy unit tests (matcher per-mode, codec per exit-code/field, runner plumbing with a stub executor, merge precedence, the `hook/*` helpers) at per-file 100%. Input rewrite (`updatedInput`) is parsed but not honored (the deferred [pre-tool-input-rewrite RFC](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)); a bridge logs+warns on it. The package is a library, so it has no `cordis.yml` load path of its own — its real-load-path coverage comes through the bridge plugins that consume it (PR-F). diff --git a/packages/README.md b/packages/README.md index 7f63e305dc..e14a1bff0e 100644 --- a/packages/README.md +++ b/packages/README.md @@ -14,6 +14,7 @@ Packages are grouped by modular role at `packages///`. The group dir | [`compact/`](compact/README.md) | Compaction capability family: the abstract seam (backend + tool deferred) | Product — stable surface | | [`subagent/`](subagent/README.md) | Subagent capability family: the provider-registry seam and the model-facing delegation tool | Product — stable surface | | [`todo/`](todo/README.md) | Todo/planning family: the model-facing `todo_write` tool (whole-list task tracking on the session log) | Product — stable surface | +| [`hooks/`](hooks/README.md) | Hook bridges + the shared Claude Code / Codex wire-protocol library | Product — stable surface | | [`session-persistence/`](session-persistence/README.md) | Persistence capability family: the seam + JSONL/SQLite backends | Product — stable surface | | [`ui/`](ui/README.md) | Editor/client integration surfaces (the ACP bridge) | Product — stable surface | | [`support/`](support/README.md) | Dev/test/example infrastructure (invariants, stdio UI, replay adapter) | Support — lower compatibility expectations | @@ -88,6 +89,7 @@ The rule: **extension** plugins depend on interfaces, never on the concrete loop | `subagent-mock/` | `support` | Scripted `SubagentProvider` for testing the seam through the real load path | (registers on `ctx.subagents`) | | `tool-subagent/` | `subagent` | Model-facing `subagent` delegation tool over `ctx.subagents` | (registers on `ctx.tools`) | | `tool-todo/` | `todo` | Model-facing `todo_write` tool; writes the whole task list to the session log (`todo/write`) | (registers on `ctx.tools`) | +| `hook-protocol/` | `hooks` | Shared Claude Code / Codex hook wire-protocol library: matcher, codec, `runHook`, merge, `hook/*` events | (none — library, no service) | | `brand/` | `util` | Type-only `Branded` nominal-typing primitive (no runtime code, no harness deps) | (none — type-only) | Each package has its own `README.md` with purpose, service API, events, extension points, and deliberate non-goals (TODOs). diff --git a/packages/hooks/README.md b/packages/hooks/README.md new file mode 100644 index 0000000000..2bdb65d5bf --- /dev/null +++ b/packages/hooks/README.md @@ -0,0 +1,11 @@ +# hooks/ — hook bridges + shared protocol + +The hooks subsystem lets users extend the agent at lifecycle points the way Claude Code and Codex do — by pointing a bridge plugin at an existing `hooks.json` (or settings) so those external shell hooks run faithfully. The canonical extension surface itself is the harness's typed interception seams ([the interception-seams RFC](../../docs/rfc/implemented/feature/2026-06-30-interception-seams.md)); a "native hook" is just an ordinary cordis plugin on those seams. These packages are the **bridges** that translate the external shell-hook protocol onto that same surface, plus the shared wire-protocol library they build on. + +| Package | Role | Shape | +|---|---|---| +| `hook-protocol/` | Shared wire-protocol core: matcher primitive, exit-code/stdout codec, `runHook` (via `ctx.bash`), most-restrictive merge, `hook/*` session events | library (no plugin) | +| `hooks-claude/` | Bridge for a Claude Code `hooks.json` / settings | plugin | +| `hooks-codex/` | Bridge for a Codex `hooks.json` | plugin | + +Codex deliberately reimplements a *subset* of the Claude Code protocol (same `hooks.json` shape, 5 events vs CC's many, command-only, regex-only matcher, no env/substitution), so `hook-protocol` owns the genuinely-identical primitives and each bridge owns only what differs (its per-event stdin payload, env, and the mapping of a hook's neutral outcome onto the harness's typed Decisions). See [hook-protocol/README.md](hook-protocol/README.md). diff --git a/packages/hooks/hook-protocol/README.md b/packages/hooks/hook-protocol/README.md new file mode 100644 index 0000000000..1983cd0411 --- /dev/null +++ b/packages/hooks/hook-protocol/README.md @@ -0,0 +1,35 @@ +# @deepseek-ai/dsh-hook-protocol + +The **shared core** of the Claude Code / Codex hook wire protocol. NOT a cordis plugin — it registers nothing and injects nothing. It is a **library** of dialect-neutral primitives the two bridge plugins (`@deepseek-ai/dsh-hooks-claude`, `@deepseek-ai/dsh-hooks-codex`) import so neither re-implements the identical halves of the protocol. + +Why a shared lib at all: Codex deliberately reimplements a *subset* of the Claude Code hook protocol — the same `hooks.json` matcher-group shape, the same exit-code/stdout output contract, the same command-hook execution model. The genuinely-shared parts live here; each bridge owns only what differs. + +## What's shared (here) vs. per-dialect (the bridges) + +| Concern | Here (`dsh-hook-protocol`) | The bridge (`dsh-hooks-claude` / `-codex`) | +|---|---|---| +| Matcher test | `matchesMatcher(pattern, query, mode)` — literal-or-regex by `mode` | picks its `mode` (`claude` = literal-or-regex, `codex` = always regex) | +| Run a hook | `runHook(bash, hook, opts, now)` — stdin payload + env via `ctx.bash`, decode | builds the per-event stdin **payload** + the dialect's **env** | +| Decode output | `parseHookOutput(exit, stdout, stderr)` → neutral `HookOutput` | maps the neutral `HookOutput` onto a seam-specific typed Decision | +| Merge N hooks | `mergeHookOutputs(outputs)` → most-restrictive `MergedHookOutcome` | — | +| Durable record | `appendHookInvoked` / `appendHookResult` (`hook/*` session events) | calls them around each invocation | + +## Primitives + +- **`matchesMatcher(matcher, query, mode)`** — match-all on absent/`''`/`'*'`; `claude` mode treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` mode is always an unanchored regex. An invalid regex matches nothing (never throws). +- **`runHook(bash, hook, options, now)`** — serialize `options.payload` to the hook's stdin (with a trailing newline iff `options.trailingNewline`), merge `options.env` after the executor's credential scrub (the `dsh-bash` trusted-plugin surface), honor the hook's `timeoutSec` (else `defaultTimeoutMs`), and decode the result. Never throws: an executor rejection (infra fault) becomes a `HookOutput` with `exitCode: undefined` (a non-blocking error). `now` is injected for testable durations. +- **`parseHookOutput(exitCode, stdout, stderr)`** — the exit-code + structured-stdout codec. Exit `0` → parse JSON stdout (lenient: non-JSON is left for the bridge); exit `2` → blocking error, `stderr` is the block reason (surfaced as `decision: 'block'`); other → non-blocking error. `hookSpecificOutput.permissionDecision` (allow/deny/ask) overrides a legacy top-level `decision`; `additionalContext`/`updatedInput`/`systemMessage`/`continue`/`stopReason`/`suppressOutput` are parsed too. Pure and total. +- **`mergeHookOutputs(outputs)`** — fold the results of every hook that matched one point: permission precedence **deny > ask > allow**, halt sticky on the first `continue:false`, block reasons joined with `\n\n`, `additionalContext`/`systemMessages` accumulated in order. + +## `hook/*` session events + +Declaration-merged into `SessionEventMap` (log-only, like `compact/*` — NOT a `SurfaceEventType`, no `surfaceOp`): + +- `hook/invoked` — `{ turn, point, dialect, matcher?, handlerId }`: a hook command ran. +- `hook/result` — `{ turn, point, handlerId, decision, exitCode?, stderrSummary?, durationMs }`: its outcome, paired by `handlerId`. + +Like every event they must sit inside an open turn. The mid-turn points (`PreToolUse`/`PostToolUse`/`UserPromptSubmit`/`Stop`) fire inside the loop's open turn by construction; `SessionStart` gets no `hook/*` record (its injected `context/message` is the durable evidence) — see the hooks RFC. + +## Input rewrite is parsed but not honored + +`HookOutput.updatedInput` carries a hook's requested tool-input rewrite (CC `updatedInput`), but the harness does not honor it yet — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite RFC](../../../docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)). A bridge logs + warns when a hook sets it. See `src/types.ts` for the full contracts. diff --git a/packages/hooks/hook-protocol/package.json b/packages/hooks/hook-protocol/package.json new file mode 100644 index 0000000000..2220220769 --- /dev/null +++ b/packages/hooks/hook-protocol/package.json @@ -0,0 +1,34 @@ +{ + "name": "@deepseek-ai/dsh-hook-protocol", + "description": "Shared Claude Code / Codex hook wire protocol: matcher engine, stdin/exit-code/stdout codec, multi-hook merge, and hook/* session events", + "version": "0.0.1", + "private": true, + "type": "module", + "main": "lib/index.js", + "types": "lib/types/index.d.ts", + "exports": { + ".": { + "types": "./lib/types/index.d.ts", + "default": "./lib/index.js" + }, + "./src/*": "./src/*", + "./package.json": "./package.json" + }, + "files": [ + "lib/index.js", + "lib/types/**/*.d.ts", + "lib/types/**/*.d.ts.map", + "src" + ], + "license": "BSD-3-Clause", + "peerDependencies": { + "@deepseek-ai/dsh-bash": "^0.0.1", + "@deepseek-ai/dsh-session": "^0.0.1", + "cordis": "^4.0.0-rc.6" + }, + "devDependencies": { + "@deepseek-ai/dsh-bash": "workspace:^", + "@deepseek-ai/dsh-session": "workspace:^", + "cordis": "^4.0.0-rc.6" + } +} diff --git a/packages/hooks/hook-protocol/src/codec.ts b/packages/hooks/hook-protocol/src/codec.ts new file mode 100644 index 0000000000..f6065af90e --- /dev/null +++ b/packages/hooks/hook-protocol/src/codec.ts @@ -0,0 +1,129 @@ +/** + * Parse a finished hook command's process outcome (exit code + stdout + stderr) + * into the dialect-neutral {@link HookOutput} both bridges map from. + * + * The exit-code contract is shared by Claude Code and Codex: + * - exit 0 → success; if stdout is structured JSON, parse it; else the plain + * stdout is available to the bridge (some events treat it as `additionalContext`). + * - exit 2 → BLOCKING error; stderr is the block reason fed back to the model. + * We surface this as `decision: 'block'` with `reason = stderr` so a bridge + * needs no separate exit-code branch — the neutral output already says "block". + * - other → non-blocking error; recorded (exitCode + stderr) but no decision. + * + * Structured-stdout fields are a SUPERSET across dialects (CC is richest); we + * parse every field we recognize and leave it to the bridge to honor only the + * subset meaningful for its dialect/hook point (Codex, e.g., ignores + * `allow`/`ask`/`updatedInput`). + * + * @module @deepseek-ai/dsh-hook-protocol/codec + */ + +import type { HookOutput } from './types.ts' + +/** The exit code a hook uses to signal a blocking error (stderr → model). */ +export const BLOCKING_EXIT_CODE = 2 + +/** Read a string field from a parsed object, or `undefined` if absent/wrong type. */ +function str(obj: Record, key: string): string | undefined { + const v = obj[key] + return typeof v === 'string' ? v : undefined +} + +/** Read a boolean field, or `undefined` if absent/wrong type. */ +function bool(obj: Record, key: string): boolean | undefined { + const v = obj[key] + return typeof v === 'boolean' ? v : undefined +} + +/** A plain (non-null, non-array) object, or `undefined`. */ +function obj(value: unknown): Record | undefined { + return typeof value === 'object' && value !== null && !Array.isArray(value) + ? value as Record + : undefined +} + +/** Normalize a raw `decision`/`permissionDecision` string to the neutral enum. */ +function decisionOf(value: string | undefined): HookOutput['decision'] { + switch (value) { + case 'approve': case 'allow': case 'block': case 'deny': case 'ask': + return value + default: + return undefined + } +} + +/** + * Parse one finished hook command into a {@link HookOutput}. `stdout`/`stderr` + * are the captured streams; `exitCode` is the process exit (`undefined` when the + * hook could not be spawned at all). Pure and total — never throws; malformed + * JSON on a 0 exit is treated as "no structured output" (the plain stdout is + * still on the bridge to use), matching both reference engines' lenient parse of + * non-JSON stdout. + */ +export function parseHookOutput(exitCode: number | undefined, stdout: string, stderr: string): HookOutput { + const trimmedErr = stderr.trim() + const output: HookOutput = { exitCode, stderr: trimmedErr } + + // Exit 2 is a blocking error in both dialects: stderr is the reason. Surface + // it as a `block` decision so the bridge maps it uniformly with a structured + // `decision:'block'` — the exit code and the JSON channel converge here. + if (exitCode === BLOCKING_EXIT_CODE) { + output.decision = 'block' + if (trimmedErr.length > 0) output.reason = trimmedErr + } + + // Structured stdout is only consulted on a clean (0) exit; on a blocking exit + // the stderr channel is authoritative. A non-zero/undefined exit other than 2 + // carries no decision (the bridge records it as a non-blocking error). + if (exitCode === 0) { + const trimmedOut = stdout.trim() + // Only attempt JSON when stdout looks like a JSON object — matches the + // reference engines, which treat other stdout as plain text, not an error. + if (trimmedOut.startsWith('{')) { + let parsed: Record | undefined + try { + parsed = obj(JSON.parse(trimmedOut)) + } catch { + // Malformed JSON on a clean exit = no structured output (lenient, as the + // reference engines are). The plain stdout remains the bridge's to use. + parsed = undefined + } + if (parsed) applyStructured(output, parsed) + } + } + + return output +} + +/** Fold a parsed structured-stdout object into `output` (mutates in place). */ +function applyStructured(output: HookOutput, parsed: Record): void { + const cont = bool(parsed, 'continue') + if (cont !== undefined) output.continue = cont + const stopReason = str(parsed, 'stopReason') + if (stopReason !== undefined) output.stopReason = stopReason + const suppress = bool(parsed, 'suppressOutput') + if (suppress !== undefined) output.suppressOutput = suppress + const sysMsg = str(parsed, 'systemMessage') + if (sysMsg !== undefined) output.systemMessage = sysMsg + + // Top-level legacy `decision` + `reason` (CC approve/block; Codex block). + const topDecision = decisionOf(str(parsed, 'decision')) + if (topDecision !== undefined) output.decision = topDecision + const topReason = str(parsed, 'reason') + if (topReason !== undefined) output.reason = topReason + + // hookSpecificOutput: the per-event channel. permissionDecision (allow/deny/ + // ask) OVERRIDES the legacy top-level decision when present; additionalContext + // and updatedInput live here too. + const hso = obj(parsed.hookSpecificOutput) + if (hso) { + const permission = decisionOf(str(hso, 'permissionDecision')) + if (permission !== undefined) output.decision = permission + const permissionReason = str(hso, 'permissionDecisionReason') + if (permissionReason !== undefined) output.reason = permissionReason + const addCtx = str(hso, 'additionalContext') + if (addCtx !== undefined) output.additionalContext = addCtx + const updated = obj(hso.updatedInput) + if (updated !== undefined) output.updatedInput = updated + } +} diff --git a/packages/hooks/hook-protocol/src/events.ts b/packages/hooks/hook-protocol/src/events.ts new file mode 100644 index 0000000000..0db75995c9 --- /dev/null +++ b/packages/hooks/hook-protocol/src/events.ts @@ -0,0 +1,72 @@ +/** + * Append helpers for the log-only `hook/*` session events — the durable record + * that a hook ran and what it decided. Thin wrappers over `session.append` so a + * bridge does not hand-build the payloads (and so the `turn`-enclosure + + * invoked/result pairing stay consistent across both bridges). + * + * `hook/*` events are log-only (not {@link SurfaceEventType}), so they carry no + * `surfaceOp` and append with no surface intent — but, like every event, they + * must sit inside an OPEN turn (the invariants oracle rejects an un-enclosed + * event). The mid-turn hook points (`PreToolUse`/`PostToolUse`/`UserPromptSubmit`/ + * `Stop`) fire inside the loop's open turn by construction; `SessionStart` is the + * exception (its injected `context/message` is the durable evidence instead), so + * a bridge does NOT write `hook/*` for session-start — see the hooks RFC. + * + * @module @deepseek-ai/dsh-hook-protocol/events + */ + +import type { Session } from '@deepseek-ai/dsh-session' +import type { HookDialect } from './types.ts' + +/** What identifies a hook invocation across its invoked/result pair. */ +export interface HookInvocation { + /** The open turn the invocation lives inside. */ + turn: number + /** The hook point (`PreToolUse`, `Stop`, …). */ + point: string + /** The bridge dialect that ran it. */ + dialect: HookDialect + /** A stable id correlating the invoked event with its result. */ + handlerId: string + /** The matcher-group pattern that selected it (absent for match-all). */ + matcher?: string +} + +/** The decided outcome half of the pair. */ +export interface HookResultRecord { + turn: number + point: string + handlerId: string + /** The dialect-neutral decision the bridge resolved (`deny`/`allow`/`block`/…). */ + decision: string + /** The process exit code (absent when the hook could not run). */ + exitCode?: number + /** A truncated stderr summary (the block-reason source on exit 2). */ + stderrSummary?: string + /** Wall-clock duration of the run. */ + durationMs: number +} + +/** Append a `hook/invoked` provenance event to `session`. */ +export function appendHookInvoked(session: Session, invocation: HookInvocation): void { + session.append('hook/invoked', { + turn: invocation.turn, + point: invocation.point, + dialect: invocation.dialect, + handlerId: invocation.handlerId, + ...invocation.matcher !== undefined ? { matcher: invocation.matcher } : {}, + }) +} + +/** Append a `hook/result` outcome event to `session` (pairs with a prior `hook/invoked`). */ +export function appendHookResult(session: Session, record: HookResultRecord): void { + session.append('hook/result', { + turn: record.turn, + point: record.point, + handlerId: record.handlerId, + decision: record.decision, + ...record.exitCode !== undefined ? { exitCode: record.exitCode } : {}, + ...record.stderrSummary !== undefined ? { stderrSummary: record.stderrSummary } : {}, + durationMs: record.durationMs, + }) +} diff --git a/packages/hooks/hook-protocol/src/index.ts b/packages/hooks/hook-protocol/src/index.ts new file mode 100644 index 0000000000..686a1480ac --- /dev/null +++ b/packages/hooks/hook-protocol/src/index.ts @@ -0,0 +1,38 @@ +/** + * `@deepseek-ai/dsh-hook-protocol` — the shared core of the Claude Code / Codex + * hook wire protocol. NOT a cordis plugin: it registers nothing and injects + * nothing. It is a LIBRARY of dialect-neutral primitives the two bridge plugins + * (`dsh-hooks-claude`, `dsh-hooks-codex`) import to avoid re-implementing the + * identical halves of the protocol: + * + * - {@link matchesMatcher} — the matcher primitive (literal-or-regex by dialect). + * - {@link runHook} + {@link parseHookOutput} — run a command hook via `ctx.bash` + * (stdin payload + env) and decode its exit-code/stdout/stderr into a neutral + * {@link HookOutput}. + * - {@link mergeHookOutputs} — fold multiple matched hooks into one + * most-restrictive {@link MergedHookOutcome} (deny > ask > allow). + * - {@link appendHookInvoked} / {@link appendHookResult} — the log-only `hook/*` + * session-event helpers (declaration-merged into `SessionEventMap`). + * + * Each bridge owns what genuinely DIFFERS: building the per-event stdin payload + * (CC vs Codex field sets), the dialect's env/substitution, and mapping the + * neutral outcome onto the harness's seam-specific typed Decisions. + * + * @module @deepseek-ai/dsh-hook-protocol + */ + +export type { + CommandHook, + HookDialect, + HookOutput, + MatcherGroup, + MatcherMode, +} from './types.ts' +export { matchesMatcher } from './matcher.ts' +export { BLOCKING_EXIT_CODE, parseHookOutput } from './codec.ts' +export { runHook } from './runner.ts' +export type { RunHookOptions, RunHookResult } from './runner.ts' +export { mergeHookOutputs } from './merge.ts' +export type { MergedDecision, MergedHookOutcome } from './merge.ts' +export { appendHookInvoked, appendHookResult } from './events.ts' +export type { HookInvocation, HookResultRecord } from './events.ts' diff --git a/packages/hooks/hook-protocol/src/matcher.ts b/packages/hooks/hook-protocol/src/matcher.ts new file mode 100644 index 0000000000..4ce3e4b62d --- /dev/null +++ b/packages/hooks/hook-protocol/src/matcher.ts @@ -0,0 +1,49 @@ +/** + * The matcher primitive shared by both hook dialects: decide whether a matcher + * pattern selects a given query (a tool name, a session source, …). + * + * The two dialects differ ONLY in how a non-empty pattern is interpreted, so + * that single axis is the {@link MatcherMode} parameter: + * - `claude`: a pattern of purely `[A-Za-z0-9_|]+` is a LITERAL (pipe = + * exact-match alternation, e.g. `Edit|Write`); anything else is a regex. + * - `codex`: every pattern is an unanchored regex (no literal fast path). + * + * Both treat an absent / empty / `'*'` pattern as match-all, and both treat an + * invalid regex as a non-match (the bridge logs it; a broken matcher must not + * throw into the loop). + * + * @module @deepseek-ai/dsh-hook-protocol/matcher + */ + +import type { MatcherMode } from './types.ts' + +/** True for an absent / empty / `'*'` pattern — the match-all sentinels. */ +function isMatchAll(matcher: string | undefined): boolean { + return matcher === undefined || matcher === '' || matcher === '*' +} + +/** A Claude-literal pattern is purely word chars + `|` (the regex-vs-literal discriminator). */ +const CLAUDE_LITERAL = /^[A-Za-z0-9_|]+$/ + +/** + * Whether `matcher` selects `query` under the given dialect {@link MatcherMode}. + * Match-all sentinels (absent/`''`/`'*'`) always match. A `claude` literal + * pattern exact-matches the query (splitting `|` into alternatives); every other + * `claude` pattern and ALL `codex` patterns are tested as an unanchored regex. + * An invalid regex matches nothing (never throws). + */ +export function matchesMatcher(matcher: string | undefined, query: string, mode: MatcherMode): boolean { + if (isMatchAll(matcher)) return true + // matcher is a non-empty string past the match-all guard. + const pattern = matcher as string + if (mode === 'claude' && CLAUDE_LITERAL.test(pattern)) { + return pattern.split('|').includes(query) + } + try { + return new RegExp(pattern).test(query) + } catch { + // Invalid regex: a broken matcher selects nothing rather than throwing into + // the agent loop. The bridge is responsible for surfacing the bad config. + return false + } +} diff --git a/packages/hooks/hook-protocol/src/merge.ts b/packages/hooks/hook-protocol/src/merge.ts new file mode 100644 index 0000000000..d8fb158eb1 --- /dev/null +++ b/packages/hooks/hook-protocol/src/merge.ts @@ -0,0 +1,109 @@ +/** + * Merge the outcomes of MULTIPLE hooks that matched one hook point into a single + * most-restrictive {@link MergedHookOutcome}. Both reference engines run matched + * hooks concurrently and fold their results; the precedence rules here are the + * intersection both dialects agree on (and the strictest interpretation where + * they differ), so a bridge gets one decision to map onto its seam: + * + * - **permission precedence `deny > ask > allow`**: any `deny`/`block` wins; an + * `ask` overrides `allow`; `allow`/`approve` only stands if nothing stricter + * appeared. (Claude Code's explicit precedence; Codex only ever blocks, so the + * rule degenerates correctly for it.) + * - **halt is sticky**: the first hook with `continue:false` sets `stop` and its + * `stopReason`. + * - **reasons accumulate**: block/deny reasons are joined with `\n\n` (Codex's + * `join_text_chunks`), so the model sees every objection, not just the first. + * - **context accumulates**: `additionalContext` from every hook is collected in + * order (CC concatenates; Codex keeps them as separate developer messages — + * either way the bridge gets the ordered list). + * - **systemMessages accumulate** likewise. + * + * @module @deepseek-ai/dsh-hook-protocol/merge + */ + +import type { HookOutput } from './types.ts' + +/** The single decision a hook point resolves to after merging all matched hooks. */ +export type MergedDecision = 'allow' | 'ask' | 'deny' | 'none' + +/** The folded outcome of every hook that matched one point. */ +export interface MergedHookOutcome { + /** + * The most-restrictive permission decision across all hooks (`deny` > `ask` > + * `allow`), or `none` when no hook expressed one. `block`/`deny` both fold to + * `deny`; `approve`/`allow` both fold to `allow`. + */ + decision: MergedDecision + /** Joined (`\n\n`) reasons from every blocking/denying hook, or `undefined`. */ + reason?: string + /** `true` when any hook asked to halt (`continue:false`). */ + stop: boolean + /** The first halting hook's `stopReason`, when one halted. */ + stopReason?: string + /** Every hook's `additionalContext`, in hook order (no joining — the bridge decides). */ + additionalContext: string[] + /** Every hook's `systemMessage`, in hook order. */ + systemMessages: string[] +} + +/** Rank a single hook's decision for the deny>ask>allow precedence (higher = stricter). */ +function rank(decision: HookOutput['decision']): number { + switch (decision) { + case 'deny': case 'block': return 3 + case 'ask': return 2 + case 'approve': case 'allow': return 1 + default: return 0 // no decision + } +} + +/** Collapse a ranked decision back to the merged enum. */ +function decisionForRank(maxRank: number): MergedDecision { + switch (maxRank) { + case 3: return 'deny' + case 2: return 'ask' + case 1: return 'allow' + default: return 'none' + } +} + +/** + * Fold `outputs` (the results of every hook that matched a point, in hook order) + * into one {@link MergedHookOutcome} by the precedence rules above. An empty list + * yields a neutral outcome (`decision: 'none'`, no stop, empty context) — the + * caller treats that as "no hook had anything to say". + */ +export function mergeHookOutputs(outputs: HookOutput[]): MergedHookOutcome { + let maxRank = 0 + const reasons: string[] = [] + let stop = false + let stopReason: string | undefined + const additionalContext: string[] = [] + const systemMessages: string[] = [] + + for (const out of outputs) { + const r = rank(out.decision) + if (r > maxRank) maxRank = r + // Collect a reason only from a blocking/denying hook (rank 3) — an allow's + // "reason" is not an objection the model needs to see. + if (r === 3 && out.reason !== undefined && out.reason.length > 0) reasons.push(out.reason) + if (out.continue === false && !stop) { + stop = true + if (out.stopReason !== undefined) stopReason = out.stopReason + } + if (out.additionalContext !== undefined && out.additionalContext.length > 0) { + additionalContext.push(out.additionalContext) + } + if (out.systemMessage !== undefined && out.systemMessage.length > 0) { + systemMessages.push(out.systemMessage) + } + } + + return { + decision: decisionForRank(maxRank), + ...reasons.length > 0 ? { reason: reasons.join('\n\n') } : {}, + stop, + ...stopReason !== undefined ? { stopReason } : {}, + additionalContext, + systemMessages, + } +} diff --git a/packages/hooks/hook-protocol/src/runner.ts b/packages/hooks/hook-protocol/src/runner.ts new file mode 100644 index 0000000000..9e26607e3d --- /dev/null +++ b/packages/hooks/hook-protocol/src/runner.ts @@ -0,0 +1,91 @@ +/** + * Run one configured command hook through the `ctx.bash` executor seam and parse + * its outcome into a {@link HookOutput}. This is where the wire protocol's + * EXECUTION half lives: feed the hook its JSON payload on stdin, hand it the + * dialect's env vars, honor its timeout, capture stdout/stderr/exit, and decode. + * + * It runs hooks through `ctx.bash` (not a bespoke `spawn`) deliberately — the + * bash seam already provides the scrubbed-but-overridable env, process-group + * kills, and timeout the protocol needs, and `dsh-bash`'s `stdin`/`env` fields + * are the trusted-plugin surface (added for exactly this) that a hook bridge — + * an in-process plugin, not model output — is allowed to use. + * + * @module @deepseek-ai/dsh-hook-protocol/runner + */ + +import type { BashExecutor } from '@deepseek-ai/dsh-bash' +import { parseHookOutput } from './codec.ts' +import type { CommandHook, HookOutput } from './types.ts' + +/** Everything a single hook invocation needs beyond its command line. */ +export interface RunHookOptions { + /** The JSON payload object written to the hook's stdin (the bridge builds it). */ + payload: unknown + /** Extra env vars for the hook process (`CLAUDE_PROJECT_DIR`, …); the bridge builds these. */ + env?: Record + /** Working directory for the hook (defaults to the executor's own default when omitted). */ + cwd?: string + /** Abort signal — cancels the hook run when fired (the parent step aborts). */ + signal?: AbortSignal + /** Default timeout (ms) when the hook config sets none. */ + defaultTimeoutMs: number + /** Whether to append a trailing newline to the stdin payload (CC yes, Codex no). */ + trailingNewline: boolean +} + +/** The {@link HookOutput} plus the wall-clock duration of the run (for `hook/result`). */ +export interface RunHookResult { + output: HookOutput + durationMs: number +} + +/** + * Run `hook` via `bash` with `options.payload` serialized to its stdin, then + * decode the result. `now` is injected (a monotonic-ms source) so the duration + * is testable without a real clock. The hook's configured `timeoutSec` (wire + * unit: seconds) overrides `defaultTimeoutMs`. The command runs with the + * dialect's `env` merged after the executor's credential scrub (the trusted- + * plugin path). NEVER throws: an infrastructure failure (the executor rejecting) + * is surfaced as a {@link HookOutput} with `exitCode: undefined`, so the caller's + * merge logic treats it as a non-blocking error rather than crashing the turn. + */ +export async function runHook( + bash: BashExecutor, + hook: CommandHook, + options: RunHookOptions, + now: () => number, +): Promise { + const started = now() + const timeoutMs = hook.timeoutSec !== undefined ? hook.timeoutSec * 1000 : options.defaultTimeoutMs + const stdin = JSON.stringify(options.payload) + (options.trailingNewline ? '\n' : '') + + const request = { + command: hook.command, + timeoutMs, + stdin, + ...options.cwd !== undefined ? { workdir: options.cwd } : {}, + ...options.env !== undefined ? { env: options.env } : {}, + ...options.signal ? { signal: options.signal } : {}, + } + + try { + const result = await bash.run(bash.resolve(request)) + // BashRunResult.exitCode is `number | null` (null = died by signal); the + // protocol's exit-code contract is numeric, so a signal death maps to + // `undefined` (a non-blocking error — no clean exit code to act on). + const exitCode = result.exitCode ?? undefined + return { + output: parseHookOutput(exitCode, result.stdout.text, result.stderr.text), + durationMs: now() - started, + } + } catch (error: unknown) { + // The executor rejects only on infrastructure faults (unusable workdir, + // missing shell). A hook that cannot run is a non-blocking error: no exit + // code, the failure on stderr for the record. The turn proceeds. + const message = error instanceof Error ? error.message : String(error) + return { + output: parseHookOutput(undefined, '', message), + durationMs: now() - started, + } + } +} diff --git a/packages/hooks/hook-protocol/src/types.ts b/packages/hooks/hook-protocol/src/types.ts new file mode 100644 index 0000000000..a06ae7f837 --- /dev/null +++ b/packages/hooks/hook-protocol/src/types.ts @@ -0,0 +1,131 @@ +/** + * Dialect-neutral vocabulary for the Claude Code / Codex hook wire protocol, + * plus the log-only `hook/*` session events. Types only — runtime helpers live + * in the sibling modules (`matcher`, `codec`, `runner`, `merge`, `events`). + * + * This package is the SHARED CORE: the truly-identical primitives both the + * `dsh-hooks-claude` and `dsh-hooks-codex` bridges build on. Each bridge owns + * its own per-dialect stdin-payload construction and decision mapping on top of + * these primitives — the divergences (which events exist, literal-vs-regex + * matching, env/substitution, snake_case extras, allow/ask support) are the + * BRIDGE's concern, not this lib's. + * + * @module @deepseek-ai/dsh-hook-protocol/types + */ + +declare module '@deepseek-ai/dsh-session' { + interface SessionEventMap { + /** + * A hook command was invoked at a hook point — log-only provenance (like + * `compact/*`; NOT a {@link SurfaceEventType}, carries no `surfaceOp`). + * `dialect` is the bridge that ran it (`claude`/`codex`/`native`), `point` + * the hook point (`PreToolUse`, `Stop`, …), `matcher` the matcher-group + * pattern that selected it (absent for match-all), `handlerId` a stable id + * for the command (so an invoked/result pair correlates). `turn` is the open + * turn the invocation lives inside. + * @mode emit + */ + 'hook/invoked': { + turn: number + point: string + dialect: HookDialect + matcher?: string + handlerId: string + } + /** + * A hook command's outcome — log-only, paired with a prior `hook/invoked` + * (same `handlerId`). `decision` is the resolved dialect-neutral outcome the + * bridge mapped it to (`allow`/`deny`/`ask`/`block`/`continue`/`stop`/`pass`), + * `exitCode` the process exit (absent if it never ran), `stderrSummary` a + * truncated stderr (the block reason source on exit 2), `durationMs` the wall + * time. `turn` matches the `hook/invoked`. + * @mode emit + */ + 'hook/result': { + turn: number + point: string + handlerId: string + decision: string + exitCode?: number + stderrSummary?: string + durationMs: number + } + } +} + +/** Which protocol dialect a hook config / invocation belongs to. */ +export type HookDialect = 'claude' | 'codex' | 'native' + +/** + * One configured command hook (the `{ type: 'command', command, timeout? }` + * shape shared by both dialects). Non-command hook types (CC's `prompt`/`agent`/ + * `http`) are parsed-and-skipped by a bridge, so only this shape reaches the + * runner. + */ +export interface CommandHook { + /** The shell command line to run. */ + command: string + /** Per-hook timeout in SECONDS (the wire unit); the runner converts to ms. */ + timeoutSec?: number +} + +/** + * One matcher group: a `matcher` pattern (absent / `''` / `'*'` = match-all) + * plus the command hooks that run when it matches. Both dialects share this + * shape (CC's `hooks.json` and Codex's `hooks.json`). + */ +export interface MatcherGroup { + matcher?: string + hooks: CommandHook[] +} + +/** + * How a matcher pattern is interpreted. Claude Code uses {@link literal} when the + * pattern is purely `[A-Za-z0-9_|]+` (pipe = exact-match alternation) and + * {@link regex} otherwise; Codex is always {@link regex}. The bridge picks the + * mode for its dialect. + */ +export type MatcherMode = 'claude' | 'codex' + +/** + * The dialect-neutral OUTCOME a hook produced, parsed from its exit code + + * stdout JSON + stderr by {@link parseHookOutput}. A bridge maps this onto a + * seam-specific typed Decision (PreToolDecision, PromptDecision, …). Every field + * is OPTIONAL because a hook may exercise any subset; the bridge decides which + * fields are meaningful for its hook point and which it ignores (faithful-but- + * degraded — e.g. Codex ignores `allow`/`ask`). + */ +export interface HookOutput { + /** The raw process exit code (`undefined` if the hook could not be run). */ + exitCode: number | undefined + /** Trimmed stderr — the block-reason source on a blocking (exit 2) hook. */ + stderr: string + /** + * `false` ⇒ the hook asked to halt (CC/Codex `continue:false`); pairs with + * {@link stopReason}. `true`/absent ⇒ proceed. + */ + continue?: boolean + /** Human-readable reason shown when {@link continue} is `false`. */ + stopReason?: string + /** Hide the hook's stdout from the transcript (CC `suppressOutput`). */ + suppressOutput?: boolean + /** + * The blocking decision a hook expressed via structured stdout (CC's + * `decision` / `hookSpecificOutput.permissionDecision`): `'block'`/`'deny'` + * forbid the action, `'approve'`/`'allow'` permit it, `'ask'` requests + * confirmation. Absent ⇒ no explicit decision (exit code governs). + */ + decision?: 'approve' | 'allow' | 'block' | 'deny' | 'ask' + /** The reason/explanation accompanying {@link decision}. */ + reason?: string + /** Extra context to inject for the next model request (CC `additionalContext`). */ + additionalContext?: string + /** A warning surfaced to the user (CC `systemMessage`). */ + systemMessage?: string + /** + * A tool-input rewrite a hook requested (CC `updatedInput`). PARSED but NOT + * honored — input rewrite is deferred (see the interception-seams RFC); a + * bridge logs + warns when this is present. + */ + updatedInput?: Record +} diff --git a/packages/hooks/hook-protocol/tests/codec.spec.ts b/packages/hooks/hook-protocol/tests/codec.spec.ts new file mode 100644 index 0000000000..41976aeab9 --- /dev/null +++ b/packages/hooks/hook-protocol/tests/codec.spec.ts @@ -0,0 +1,106 @@ +import { describe, expect, it } from 'vitest' +import { parseHookOutput } from '@deepseek-ai/dsh-hook-protocol' + +describe('parseHookOutput — exit code semantics', () => { + it('exit 0 with no stdout is a neutral success', () => { + const out = parseHookOutput(0, '', '') + expect(out.exitCode).toBe(0) + expect(out.decision).toBeUndefined() + expect(out.continue).toBeUndefined() + }) + + it('exit 2 is a blocking error: stderr becomes the block decision + reason', () => { + const out = parseHookOutput(2, '', 'this command is not allowed') + expect(out.decision).toBe('block') + expect(out.reason).toBe('this command is not allowed') + expect(out.stderr).toBe('this command is not allowed') + }) + + it('exit 2 with empty stderr still blocks, with no reason', () => { + const out = parseHookOutput(2, '', ' ') + expect(out.decision).toBe('block') + expect(out.reason).toBeUndefined() + }) + + it('other non-zero exit is a non-blocking error (no decision, stderr recorded)', () => { + const out = parseHookOutput(1, '', 'some warning') + expect(out.decision).toBeUndefined() + expect(out.exitCode).toBe(1) + expect(out.stderr).toBe('some warning') + }) + + it('undefined exit (could not run) carries no decision', () => { + const out = parseHookOutput(undefined, '', 'spawn failed: ENOENT') + expect(out.exitCode).toBeUndefined() + expect(out.decision).toBeUndefined() + expect(out.stderr).toBe('spawn failed: ENOENT') + }) +}) + +describe('parseHookOutput — structured stdout (exit 0 only)', () => { + it('parses top-level continue/stopReason/suppressOutput/systemMessage', () => { + const out = parseHookOutput(0, JSON.stringify({ + continue: false, stopReason: 'budget exceeded', suppressOutput: true, systemMessage: 'heads up', + }), '') + expect(out.continue).toBe(false) + expect(out.stopReason).toBe('budget exceeded') + expect(out.suppressOutput).toBe(true) + expect(out.systemMessage).toBe('heads up') + }) + + it('parses legacy top-level decision + reason (approve/block)', () => { + expect(parseHookOutput(0, JSON.stringify({ decision: 'block', reason: 'nope' }), '').decision).toBe('block') + expect(parseHookOutput(0, JSON.stringify({ decision: 'approve' }), '').decision).toBe('approve') + }) + + it('hookSpecificOutput.permissionDecision OVERRIDES the legacy top-level decision', () => { + const out = parseHookOutput(0, JSON.stringify({ + decision: 'approve', + hookSpecificOutput: { permissionDecision: 'deny', permissionDecisionReason: 'denied by policy' }, + }), '') + expect(out.decision).toBe('deny') + expect(out.reason).toBe('denied by policy') + }) + + it('parses allow/ask permissionDecision (the bridge decides whether to honor)', () => { + expect(parseHookOutput(0, JSON.stringify({ hookSpecificOutput: { permissionDecision: 'allow' } }), '').decision).toBe('allow') + expect(parseHookOutput(0, JSON.stringify({ hookSpecificOutput: { permissionDecision: 'ask' } }), '').decision).toBe('ask') + }) + + it('parses additionalContext and updatedInput from hookSpecificOutput', () => { + const out = parseHookOutput(0, JSON.stringify({ + hookSpecificOutput: { additionalContext: 'remember X', updatedInput: { command: 'safe' } }, + }), '') + expect(out.additionalContext).toBe('remember X') + expect(out.updatedInput).toEqual({ command: 'safe' }) + }) + + it('an unknown decision string is ignored (not coerced)', () => { + expect(parseHookOutput(0, JSON.stringify({ decision: 'maybe' }), '').decision).toBeUndefined() + }) + + it('malformed JSON on a clean exit is lenient (no structured output, no throw)', () => { + const out = parseHookOutput(0, '{ not valid json', '') + expect(out.decision).toBeUndefined() + expect(out.continue).toBeUndefined() + }) + + it('non-object stdout (plain text) on exit 0 is left for the bridge (no JSON attempt)', () => { + const out = parseHookOutput(0, 'just some text output', '') + expect(out.decision).toBeUndefined() + expect(out.continue).toBeUndefined() + }) + + it('a JSON array stdout parses but yields no fields (not an object)', () => { + // Starts with '{'? No — '[' — so it is not even attempted. Neutral. + const out = parseHookOutput(0, '[1,2,3]', '') + expect(out.decision).toBeUndefined() + }) + + it('structured stdout is IGNORED on a blocking (exit 2) run — stderr is authoritative', () => { + const out = parseHookOutput(2, JSON.stringify({ decision: 'approve' }), 'blocked') + // exit 2 forces block regardless of what stdout claims + expect(out.decision).toBe('block') + expect(out.reason).toBe('blocked') + }) +}) diff --git a/packages/hooks/hook-protocol/tests/events.spec.ts b/packages/hooks/hook-protocol/tests/events.spec.ts new file mode 100644 index 0000000000..f63ae2a9cb --- /dev/null +++ b/packages/hooks/hook-protocol/tests/events.spec.ts @@ -0,0 +1,61 @@ +import { describe, expect, it } from 'vitest' +import { Session, SessionId } from '@deepseek-ai/dsh-session' +import { appendHookInvoked, appendHookResult } from '@deepseek-ai/dsh-hook-protocol' + +describe('hook/* session events', () => { + it('appendHookInvoked records a log-only hook/invoked (with matcher when present)', () => { + const session = new Session(SessionId('s')) + appendHookInvoked(session, { turn: 1, point: 'PreToolUse', dialect: 'claude', handlerId: 'h1', matcher: 'Bash' }) + + const ev = [...session.events].find(e => e.type === 'hook/invoked') + expect(ev?.type).toBe('hook/invoked') + if (ev?.type === 'hook/invoked') { + expect(ev.data).toMatchObject({ turn: 1, point: 'PreToolUse', dialect: 'claude', handlerId: 'h1', matcher: 'Bash' }) + } + // Log-only: no surfaceOp on the event. + expect((ev as unknown as { surfaceOp?: unknown }).surfaceOp).toBeUndefined() + }) + + it('omits matcher when absent (match-all hook)', () => { + const session = new Session(SessionId('s')) + appendHookInvoked(session, { turn: 2, point: 'Stop', dialect: 'native', handlerId: 'h2' }) + + const ev = [...session.events].find(e => e.type === 'hook/invoked') + if (ev?.type === 'hook/invoked') { + expect('matcher' in ev.data).toBe(false) + } + }) + + it('appendHookResult records the decided outcome, omitting absent optionals', () => { + const session = new Session(SessionId('s')) + appendHookResult(session, { + turn: 1, point: 'PreToolUse', handlerId: 'h1', decision: 'deny', + exitCode: 2, stderrSummary: 'blocked', durationMs: 12, + }) + const full = [...session.events].find(e => e.type === 'hook/result') + if (full?.type === 'hook/result') { + expect(full.data).toMatchObject({ turn: 1, point: 'PreToolUse', handlerId: 'h1', decision: 'deny', exitCode: 2, stderrSummary: 'blocked', durationMs: 12 }) + } + + // A result with no exit code / no stderr (e.g. a hook that could not run) omits both keys. + const session2 = new Session(SessionId('s2')) + appendHookResult(session2, { turn: 1, point: 'Stop', handlerId: 'h3', decision: 'allow', durationMs: 3 }) + const sparse = [...session2.events].find(e => e.type === 'hook/result') + if (sparse?.type === 'hook/result') { + expect('exitCode' in sparse.data).toBe(false) + expect('stderrSummary' in sparse.data).toBe(false) + expect(sparse.data.durationMs).toBe(3) + } + }) + + it('an invoked/result pair correlates by handlerId', () => { + const session = new Session(SessionId('s')) + appendHookInvoked(session, { turn: 1, point: 'PreToolUse', dialect: 'claude', handlerId: 'pair-1' }) + appendHookResult(session, { turn: 1, point: 'PreToolUse', handlerId: 'pair-1', decision: 'allow', exitCode: 0, durationMs: 7 }) + + const invoked = [...session.events].find(e => e.type === 'hook/invoked') + const result = [...session.events].find(e => e.type === 'hook/result') + expect(invoked?.type === 'hook/invoked' && invoked.data.handlerId).toBe('pair-1') + expect(result?.type === 'hook/result' && result.data.handlerId).toBe('pair-1') + }) +}) diff --git a/packages/hooks/hook-protocol/tests/matcher.spec.ts b/packages/hooks/hook-protocol/tests/matcher.spec.ts new file mode 100644 index 0000000000..37e2acb137 --- /dev/null +++ b/packages/hooks/hook-protocol/tests/matcher.spec.ts @@ -0,0 +1,58 @@ +import { describe, expect, it } from 'vitest' +import { matchesMatcher } from '@deepseek-ai/dsh-hook-protocol' + +describe('matchesMatcher — match-all sentinels (both dialects)', () => { + for (const mode of ['claude', 'codex'] as const) { + it(`${mode}: absent / empty / '*' match everything`, () => { + expect(matchesMatcher(undefined, 'Bash', mode)).toBe(true) + expect(matchesMatcher('', 'anything', mode)).toBe(true) + expect(matchesMatcher('*', 'whatever', mode)).toBe(true) + }) + } +}) + +describe('matchesMatcher — claude dialect (literal-or-regex)', () => { + it('a pure word-char pattern is a LITERAL exact match (not substring)', () => { + expect(matchesMatcher('Bash', 'Bash', 'claude')).toBe(true) + // literal exact: "Bash" must NOT match "BashOutput" (a regex would, substring) + expect(matchesMatcher('Bash', 'BashOutput', 'claude')).toBe(false) + }) + + it('a pipe pattern is literal ALTERNATION (exact match any alternative)', () => { + expect(matchesMatcher('Edit|Write', 'Edit', 'claude')).toBe(true) + expect(matchesMatcher('Edit|Write', 'Write', 'claude')).toBe(true) + expect(matchesMatcher('Edit|Write', 'Read', 'claude')).toBe(false) + // still exact per-alternative, not substring + expect(matchesMatcher('Edit|Write', 'EditFile', 'claude')).toBe(false) + }) + + it('a non-word pattern falls through to regex (unanchored)', () => { + expect(matchesMatcher('^Bash$', 'Bash', 'claude')).toBe(true) + expect(matchesMatcher('Bash.*', 'BashOutput', 'claude')).toBe(true) + expect(matchesMatcher('.*\\.ts$', 'foo.ts', 'claude')).toBe(true) + expect(matchesMatcher('.*\\.ts$', 'foo.js', 'claude')).toBe(false) + }) +}) + +describe('matchesMatcher — codex dialect (always regex)', () => { + it('a word pattern is an unanchored regex (substring matches, unlike claude literal)', () => { + expect(matchesMatcher('Bash', 'Bash', 'codex')).toBe(true) + // codex has NO literal fast path: "Bash" is /Bash/, so it DOES match a substring + expect(matchesMatcher('Bash', 'BashOutput', 'codex')).toBe(true) + }) + + it('regex alternation and anchors work', () => { + expect(matchesMatcher('Edit|Write', 'Edit', 'codex')).toBe(true) + expect(matchesMatcher('^Bash$', 'Bash', 'codex')).toBe(true) + expect(matchesMatcher('^Bash$', 'BashOutput', 'codex')).toBe(false) + }) +}) + +describe('matchesMatcher — invalid regex is a non-match (never throws)', () => { + it('an unbalanced pattern matches nothing rather than throwing', () => { + // '(' is not the claude-literal charset, so it goes to the regex path and is invalid. + expect(() => matchesMatcher('(', 'x', 'claude')).not.toThrow() + expect(matchesMatcher('(', 'x', 'claude')).toBe(false) + expect(matchesMatcher('[', 'x', 'codex')).toBe(false) + }) +}) diff --git a/packages/hooks/hook-protocol/tests/merge.spec.ts b/packages/hooks/hook-protocol/tests/merge.spec.ts new file mode 100644 index 0000000000..6e52d15020 --- /dev/null +++ b/packages/hooks/hook-protocol/tests/merge.spec.ts @@ -0,0 +1,82 @@ +import { describe, expect, it } from 'vitest' +import { mergeHookOutputs } from '@deepseek-ai/dsh-hook-protocol' +import type { HookOutput } from '@deepseek-ai/dsh-hook-protocol' + +function out(over: Partial = {}): HookOutput { + return { exitCode: 0, stderr: '', ...over } +} + +describe('mergeHookOutputs — permission precedence deny > ask > allow', () => { + it('empty list yields a neutral outcome', () => { + const m = mergeHookOutputs([]) + expect(m.decision).toBe('none') + expect(m.stop).toBe(false) + expect(m.additionalContext).toEqual([]) + expect(m.systemMessages).toEqual([]) + }) + + it('a single allow yields allow', () => { + expect(mergeHookOutputs([out({ decision: 'allow' })]).decision).toBe('allow') + expect(mergeHookOutputs([out({ decision: 'approve' })]).decision).toBe('allow') + }) + + it('deny beats ask beats allow regardless of order', () => { + expect(mergeHookOutputs([out({ decision: 'allow' }), out({ decision: 'ask' })]).decision).toBe('ask') + expect(mergeHookOutputs([out({ decision: 'ask' }), out({ decision: 'deny' })]).decision).toBe('deny') + expect(mergeHookOutputs([out({ decision: 'deny' }), out({ decision: 'allow' })]).decision).toBe('deny') + // block folds to deny + expect(mergeHookOutputs([out({ decision: 'allow' }), out({ decision: 'block' })]).decision).toBe('deny') + }) + + it('no decision anywhere yields none', () => { + expect(mergeHookOutputs([out(), out()]).decision).toBe('none') + }) +}) + +describe('mergeHookOutputs — reasons, stop, context, systemMessages accumulate', () => { + it('joins block/deny reasons with a blank line (only from blocking hooks)', () => { + const m = mergeHookOutputs([ + out({ decision: 'deny', reason: 'first objection' }), + out({ decision: 'allow', reason: 'this allow reason is NOT collected' }), + out({ decision: 'block', reason: 'second objection' }), + ]) + expect(m.reason).toBe('first objection\n\nsecond objection') + }) + + it('no reason when nothing blocked', () => { + expect(mergeHookOutputs([out({ decision: 'allow' })]).reason).toBeUndefined() + }) + + it('stop is sticky on the first continue:false, capturing its stopReason', () => { + const m = mergeHookOutputs([ + out({ continue: true }), + out({ continue: false, stopReason: 'halt now' }), + out({ continue: false, stopReason: 'second halt — ignored' }), + ]) + expect(m.stop).toBe(true) + expect(m.stopReason).toBe('halt now') + }) + + it('no stop when every hook continues', () => { + const m = mergeHookOutputs([out({ continue: true }), out()]) + expect(m.stop).toBe(false) + expect(m.stopReason).toBeUndefined() + }) + + it('a continue:false with no stopReason stops with an undefined reason', () => { + const m = mergeHookOutputs([out({ continue: false })]) + expect(m.stop).toBe(true) + expect(m.stopReason).toBeUndefined() + }) + + it('collects additionalContext and systemMessages in hook order, skipping empties', () => { + const m = mergeHookOutputs([ + out({ additionalContext: 'ctx-A', systemMessage: 'warn-A' }), + out({ additionalContext: '', systemMessage: '' }), // empties skipped + out({ additionalContext: 'ctx-B' }), + out({ systemMessage: 'warn-B' }), + ]) + expect(m.additionalContext).toEqual(['ctx-A', 'ctx-B']) + expect(m.systemMessages).toEqual(['warn-A', 'warn-B']) + }) +}) diff --git a/packages/hooks/hook-protocol/tests/runner.spec.ts b/packages/hooks/hook-protocol/tests/runner.spec.ts new file mode 100644 index 0000000000..cfa7a76ab0 --- /dev/null +++ b/packages/hooks/hook-protocol/tests/runner.spec.ts @@ -0,0 +1,134 @@ +import { describe, expect, it } from 'vitest' +import type { BashExecRequest, BashExecSpec, BashExecutor, BashRunResult } from '@deepseek-ai/dsh-bash' +import { runHook } from '@deepseek-ai/dsh-hook-protocol' + +/** + * A minimal stand-in for the bits of {@link BashExecutor} that {@link runHook} + * actually calls (`resolve` then `run`). `runHook` is pure plumbing over those + * two methods, so a duck-typed recorder is the right test seam — the REAL + * executor (dsh-bash-local) is exercised end-to-end by the bridge e2e tests in + * PR-F, not here. + */ +function recordingBash(run: (spec: BashExecSpec) => Promise): { + bash: BashExecutor + specs: BashExecSpec[] +} { + const specs: BashExecSpec[] = [] + const bash = { + resolve(request: BashExecRequest): BashExecSpec { + // Carry the request through verbatim, defaulting the required spec fields — + // exactly what dsh-bash-local's resolve does for the fields runHook sets. + return { + command: request.command, + workdir: request.workdir ?? '/stub', + timeoutMs: request.timeoutMs ?? 0, + ...request.signal ? { signal: request.signal } : {}, + ...request.stdin !== undefined ? { stdin: request.stdin } : {}, + ...request.env !== undefined ? { env: request.env } : {}, + owner: request.owner, + } + }, + async run(spec: BashExecSpec): Promise { + specs.push(spec) + return run(spec) + }, + } as unknown as BashExecutor + return { bash, specs } +} + +function result(over: Partial = {}): BashRunResult { + return { + exitCode: 0, + signal: null, + timedOut: false, + aborted: false, + timeoutMs: 1000, + stdout: { text: '', truncated: false }, + stderr: { text: '', truncated: false }, + ...over, + } +} + +const clock = () => { let t = 0; return () => (t += 5) } // +5ms per call → duration 5 + +describe('runHook — payload + env + stdin plumbing', () => { + it('serializes the payload to stdin (with trailing newline when requested)', async () => { + const { bash, specs } = recordingBash(async () => result({ stdout: { text: '', truncated: false } })) + await runHook(bash, { command: 'my-hook.sh' }, { + payload: { hook_event_name: 'PreToolUse', tool_name: 'Bash' }, + defaultTimeoutMs: 60000, + trailingNewline: true, + }, clock()) + expect(specs[0]!.stdin).toBe(JSON.stringify({ hook_event_name: 'PreToolUse', tool_name: 'Bash' }) + '\n') + expect(specs[0]!.command).toBe('my-hook.sh') + }) + + it('omits the trailing newline when trailingNewline is false (Codex)', async () => { + const { bash, specs } = recordingBash(async () => result()) + await runHook(bash, { command: 'h' }, { payload: { a: 1 }, defaultTimeoutMs: 1000, trailingNewline: false }, clock()) + expect(specs[0]!.stdin).toBe('{"a":1}') + }) + + it('threads env and cwd into the request', async () => { + const { bash, specs } = recordingBash(async () => result()) + await runHook(bash, { command: 'h' }, { + payload: {}, env: { CLAUDE_PROJECT_DIR: '/proj' }, cwd: '/work', + defaultTimeoutMs: 1000, trailingNewline: true, + }, clock()) + expect(specs[0]!.env).toEqual({ CLAUDE_PROJECT_DIR: '/proj' }) + expect(specs[0]!.workdir).toBe('/work') + }) + + it('a per-hook timeoutSec (seconds) overrides the default (ms)', async () => { + const { bash, specs } = recordingBash(async () => result()) + await runHook(bash, { command: 'h', timeoutSec: 3 }, { payload: {}, defaultTimeoutMs: 60000, trailingNewline: true }, clock()) + expect(specs[0]!.timeoutMs).toBe(3000) + }) + + it('falls back to the default timeout when the hook sets none', async () => { + const { bash, specs } = recordingBash(async () => result()) + await runHook(bash, { command: 'h' }, { payload: {}, defaultTimeoutMs: 60000, trailingNewline: true }, clock()) + expect(specs[0]!.timeoutMs).toBe(60000) + }) + + it('passes the abort signal through', async () => { + const controller = new AbortController() + const { bash, specs } = recordingBash(async () => result()) + await runHook(bash, { command: 'h' }, { payload: {}, signal: controller.signal, defaultTimeoutMs: 1000, trailingNewline: true }, clock()) + expect(specs[0]!.signal).toBe(controller.signal) + }) +}) + +describe('runHook — outcome decoding + duration', () => { + it('decodes a clean exit with structured stdout and reports a duration', async () => { + const { bash } = recordingBash(async () => result({ + exitCode: 0, stdout: { text: JSON.stringify({ decision: 'block', reason: 'no' }), truncated: false }, + })) + const { output, durationMs } = await runHook(bash, { command: 'h' }, { payload: {}, defaultTimeoutMs: 1000, trailingNewline: true }, clock()) + expect(output.decision).toBe('block') + expect(output.reason).toBe('no') + expect(durationMs).toBe(5) + }) + + it('a signal death (exitCode null) decodes as undefined exit (non-blocking error)', async () => { + const { bash } = recordingBash(async () => result({ exitCode: null, signal: 'SIGKILL', stderr: { text: 'killed', truncated: false } })) + const { output } = await runHook(bash, { command: 'h' }, { payload: {}, defaultTimeoutMs: 1000, trailingNewline: true }, clock()) + expect(output.exitCode).toBeUndefined() + expect(output.decision).toBeUndefined() + expect(output.stderr).toBe('killed') + }) + + it('an executor rejection (infra fault) becomes a non-blocking error, never throws', async () => { + const { bash } = recordingBash(async () => { throw new Error('bad workdir: ENOENT') }) + const { output } = await runHook(bash, { command: 'h' }, { payload: {}, defaultTimeoutMs: 1000, trailingNewline: true }, clock()) + expect(output.exitCode).toBeUndefined() + expect(output.stderr).toBe('bad workdir: ENOENT') + expect(output.decision).toBeUndefined() + }) + + it('a non-Error rejection is stringified onto stderr', async () => { + const { bash } = recordingBash(async () => { throw 'plain string fault' }) + const { output } = await runHook(bash, { command: 'h' }, { payload: {}, defaultTimeoutMs: 1000, trailingNewline: true }, clock()) + expect(output.stderr).toBe('plain string fault') + }) +}) diff --git a/packages/hooks/hook-protocol/tsconfig.json b/packages/hooks/hook-protocol/tsconfig.json new file mode 100644 index 0000000000..dc4f8d9e16 --- /dev/null +++ b/packages/hooks/hook-protocol/tsconfig.json @@ -0,0 +1,24 @@ +{ + "extends": "../../../tsconfig.base.json", + "compilerOptions": { + "rootDir": "src", + "outDir": "lib/types" + }, + "include": [ + "src" + ], + "references": [ + { + "path": "../../../vendor/cosmokit" + }, + { + "path": "../../../vendor/cordis" + }, + { + "path": "../../bash/bash" + }, + { + "path": "../../core/session" + } + ] +} diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml index fc57472bef..b5ca00356a 100644 --- a/pnpm-lock.yaml +++ b/pnpm-lock.yaml @@ -248,6 +248,18 @@ importers: specifier: ^4.0.0-rc.6 version: 4.0.0-rc.6(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.4) + packages/hooks/hook-protocol: + devDependencies: + '@deepseek-ai/dsh-bash': + specifier: workspace:^ + version: link:../../bash/bash + '@deepseek-ai/dsh-session': + specifier: workspace:^ + version: link:../../core/session + cordis: + specifier: ^4.0.0-rc.6 + version: 4.0.0-rc.6(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.4) + packages/llm/llm: devDependencies: '@deepseek-ai/dsh-brand': diff --git a/tsconfig.base.json b/tsconfig.base.json index 3f2d828cb4..98661684fb 100644 --- a/tsconfig.base.json +++ b/tsconfig.base.json @@ -46,6 +46,7 @@ "./packages/compact/*/src", "./packages/subagent/*/src", "./packages/todo/*/src", + "./packages/hooks/*/src", "./packages/session-persistence/*/src", "./packages/ui/*/src", "./packages/util/*/src", diff --git a/tsconfig.build.json b/tsconfig.build.json index 22ba7a0687..cf468b4842 100644 --- a/tsconfig.build.json +++ b/tsconfig.build.json @@ -40,6 +40,7 @@ { "path": "./packages/subagent/subagent-spawn" }, { "path": "./packages/subagent/subagent-fork" }, { "path": "./packages/subagent/subagent-acp" }, - { "path": "./packages/todo/tool-todo" } + { "path": "./packages/todo/tool-todo" }, + { "path": "./packages/hooks/hook-protocol" } ] } diff --git a/tsconfig.json b/tsconfig.json index f0a4389df5..8f2b2c8fb1 100644 --- a/tsconfig.json +++ b/tsconfig.json @@ -51,6 +51,7 @@ { "path": "./packages/subagent/subagent-spawn" }, { "path": "./packages/subagent/subagent-fork" }, { "path": "./packages/subagent/subagent-acp" }, - { "path": "./packages/todo/tool-todo" } + { "path": "./packages/todo/tool-todo" }, + { "path": "./packages/hooks/hook-protocol" } ] } From c658f4d1559f869b64c5f69b4a6f049d262240bc Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 01:12:04 +0800 Subject: [PATCH 13/47] =?UTF-8?q?fix(hooks):=20address=20Codex=20review=20?= =?UTF-8?q?=E2=80=94=20tighten=20codec=20to=20the=20reference=20schemas,?= =?UTF-8?q?=20preserve=20stdout?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex's PR-E review found three protocol-fidelity blockers + two doc gaps, all verified against ~/repos/refs: - (A) Top-level `decision` accepted allow/deny/ask, but both reference schemas reserve those for hookSpecificOutput.permissionDecision — the legacy top-level decision is approve/block ONLY. Split topLevelDecisionOf (approve/block) from permissionDecisionOf (allow/deny/ask), so an out-of-band {"decision":"deny"} is now invalid and ignored instead of becoming a real blocking decision. - (A) hookSpecificOutput was parsed without its hookEventName discriminator. HookOutput now surfaces hookEventName so a bridge can discard a block whose claimed event doesn't match the firing one (the schemas key the block by event). - (A) runHook discarded raw stdout. HookOutput now carries `stdout` (trimmed, verbatim) so a bridge can reproduce CC's plain-stdout rendering / Codex's plain-stdout-as-additionalContext behavior. - (B) hook/* SessionEventMap variants were only named in prose; added a payload/role table to core-data-structures/session.md (a maintained catalog surface). - (B) Removed PR-stack-position references (PR-F / "future bridge packages") from a test comment and the RFC, per the current-state-wording rule. New codec tests: top-level allow/deny/ask invalid+ignored, hookEventName capture, raw stdout preserved on plain + JSON + empty stdout. 51 tests, per-file 100%. --- docs/core-data-structures/session.md | 11 +++++ .../feature/2026-06-30-hook-protocol-lib.md | 6 +-- packages/hooks/hook-protocol/src/codec.ts | 45 ++++++++++++------- packages/hooks/hook-protocol/src/types.ts | 28 ++++++++++-- .../hooks/hook-protocol/tests/codec.spec.ts | 30 ++++++++++++- .../hooks/hook-protocol/tests/merge.spec.ts | 2 +- .../hooks/hook-protocol/tests/runner.spec.ts | 4 +- 7 files changed, 99 insertions(+), 27 deletions(-) diff --git a/docs/core-data-structures/session.md b/docs/core-data-structures/session.md index eb323dcd3e..2d462f96d9 100644 --- a/docs/core-data-structures/session.md +++ b/docs/core-data-structures/session.md @@ -211,6 +211,17 @@ interface TurnEndReasonMap { Every session event lives **inside** a turn (between a `turn/start` and its `turn/end`). The loop appends queued `user/message` events *after* `turn/start`, and an idle `agent.inject()` wraps its `context/message` in a one-shot `injection` turn. This makes the turn the single durability/replay boundary: a backend can treat anything after the last `turn/end` as an interrupted-crash tail without risking the loss of legitimately-recorded between-turn context. The `dsh-invariants` plugin enforces it in dev (a message event outside an open turn throws). See [the turn-enclosure invariant RFC](../rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md). +## Plugin-contributed log-only events + +A plugin may declaration-merge extra `SessionEventMap` types. These are **log-only**: NOT `SurfaceEventType`s (they carry no `surfaceOp` and contribute nothing to derived history), but, like every event, they must sit inside an open turn. The compaction seam's `compact/*` are documented on [compaction.md](compaction.md); the hook bridges' `hook/*` provenance (from `@deepseek-ai/dsh-hook-protocol`) are: + +| Event | Payload | Role | +|---|---|---| +| `hook/invoked` | `{ turn, point, dialect, matcher?, handlerId }` | A hook command was invoked at a hook `point` (`PreToolUse`, `Stop`, …). `dialect` is the bridge (`claude`/`codex`/`native`); `matcher` the matcher-group pattern that selected it (absent for match-all); `handlerId` correlates with the result. | +| `hook/result` | `{ turn, point, handlerId, decision, exitCode?, stderrSummary?, durationMs }` | The decided outcome, paired by `handlerId`. `decision` is the resolved neutral outcome (`deny`/`allow`/`block`/`stop`/`pass`/…); `exitCode` absent when the hook could not run; `stderrSummary` the truncated block-reason source. | + +The mid-turn hook points (`PreToolUse`/`PostToolUse`/`UserPromptSubmit`/`Stop`) fire inside the loop's open turn, so their `hook/*` records are turn-enclosed by construction. `SessionStart` gets no `hook/*` record — its injected `context/message` is the durable evidence — because it has no open turn to enclose one (see the hooks RFC). + ## Durability contract What a persistence backend relies on: the durable log persists every event verbatim, **including** `assistant/chunk` — `seq` must stay contiguous, so chunks cannot be filtered out of the canonical log. All `event.data` must be JSON-serializable; `Session.append` enforces this at the source (throwing on non-serializable data), so a bad event never enters the log and `session.events` always equals what a backend can persist. Adding an event type that carries non-serializable data, or that breaks the turn/step nesting the invariants plugin checks, is a breaking change to the on-disk format. diff --git a/docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md b/docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md index ecb45ea2c3..848eeec219 100644 --- a/docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md +++ b/docs/rfc/implemented/feature/2026-06-30-hook-protocol-lib.md @@ -12,7 +12,7 @@ This RFC introduces `@deepseek-ai/dsh-hook-protocol`, a **library** (not a plugi ## Decision -A new `packages/hooks/` group with `hook-protocol` as a pure library. It owns four primitive families and the `hook/*` session events; each bridge (PR-F) owns what genuinely differs. +A new `packages/hooks/` group with `hook-protocol` as a pure library. It owns four primitive families and the `hook/*` session events; each bridge plugin (`dsh-hooks-claude`, `dsh-hooks-codex`) owns what genuinely differs. **Shared (here):** - **Matcher** — `matchesMatcher(pattern, query, mode)`. The ONE axis the dialects differ on is collapsed to the `mode` parameter: `claude` treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` is always an unanchored regex. Match-all on absent/`''`/`'*'`; an invalid regex matches nothing (never throws into the loop). @@ -21,7 +21,7 @@ A new `packages/hooks/` group with `hook-protocol` as a pure library. It owns fo - **Merge** — `mergeHookOutputs(outputs)`, folding multiple matched hooks into one most-restrictive `MergedHookOutcome`: permission precedence **deny > ask > allow**, halt sticky on the first `continue:false`, block reasons joined `\n\n`, context/system-messages accumulated in order. - **`hook/*` session events** — `hook/invoked` / `hook/result`, declaration-merged into `SessionEventMap` (log-only, like `compact/*` — NOT `SurfaceEventType`s), with `appendHookInvoked`/`appendHookResult` helpers so the invoked/result pairing and turn-enclosure stay consistent across bridges. -**Per-dialect (the bridges, PR-F):** building each event's stdin payload (CC's base+per-event field sets vs Codex's snake_case with `turn_id`/`model` extras), the dialect's env + `${CLAUDE_PLUGIN_ROOT}` substitution (CC) vs none (Codex), and mapping the neutral `HookOutput`/`MergedHookOutcome` onto the harness's seam-specific typed Decisions (`PreToolDecision`, `PromptDecision`, `ContinuationDecision`, `PostToolDecision`). +**Per-dialect (the bridge plugins):** building each event's stdin payload (CC's base+per-event field sets vs Codex's snake_case with `turn_id`/`model` extras), the dialect's env + `${CLAUDE_PLUGIN_ROOT}` substitution (CC) vs none (Codex), and mapping the neutral `HookOutput`/`MergedHookOutcome` onto the harness's seam-specific typed Decisions (`PreToolDecision`, `PromptDecision`, `ContinuationDecision`, `PostToolDecision`). ### Why "shared core + per-dialect adapters", not "one parameterized engine" @@ -29,4 +29,4 @@ A single engine parameterized by a full `dialect` descriptor was considered and ## Consequences -The two bridges (PR-F) become thin: parse the config file, pick a matcher mode, build the per-event payload+env, call `runHook` + `mergeHookOutputs`, map the outcome to a Decision, and append `hook/*`. The protocol's correctness-critical halves (matcher semantics, exit-code contract, merge precedence) live in one tested place — `hook-protocol` ships with heavy unit tests (matcher per-mode, codec per exit-code/field, runner plumbing with a stub executor, merge precedence, the `hook/*` helpers) at per-file 100%. Input rewrite (`updatedInput`) is parsed but not honored (the deferred [pre-tool-input-rewrite RFC](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)); a bridge logs+warns on it. The package is a library, so it has no `cordis.yml` load path of its own — its real-load-path coverage comes through the bridge plugins that consume it (PR-F). +The two bridge plugins become thin: parse the config file, pick a matcher mode, build the per-event payload+env, call `runHook` + `mergeHookOutputs`, map the outcome to a Decision, and append `hook/*`. The protocol's correctness-critical halves (matcher semantics, exit-code contract, merge precedence) live in one tested place — `hook-protocol` ships with heavy unit tests (matcher per-mode, codec per exit-code/field, runner plumbing with a stub executor, merge precedence, the `hook/*` helpers) at per-file 100%. Input rewrite (`updatedInput`) is parsed but not honored (the deferred [pre-tool-input-rewrite RFC](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)); a bridge logs+warns on it. The package is a library, so it has no `cordis.yml` load path of its own — its real-load-path coverage comes through the bridge plugins that consume it. diff --git a/packages/hooks/hook-protocol/src/codec.ts b/packages/hooks/hook-protocol/src/codec.ts index f6065af90e..ac49526600 100644 --- a/packages/hooks/hook-protocol/src/codec.ts +++ b/packages/hooks/hook-protocol/src/codec.ts @@ -42,14 +42,19 @@ function obj(value: unknown): Record | undefined { : undefined } -/** Normalize a raw `decision`/`permissionDecision` string to the neutral enum. */ -function decisionOf(value: string | undefined): HookOutput['decision'] { - switch (value) { - case 'approve': case 'allow': case 'block': case 'deny': case 'ask': - return value - default: - return undefined - } +/** + * The legacy TOP-LEVEL `decision` is only `approve`/`block` in both reference + * schemas — `allow`/`deny`/`ask` are reserved for `hookSpecificOutput. + * permissionDecision`. So an out-of-band `{"decision":"deny"}` is invalid and + * ignored here (it must not become a real blocking decision). + */ +function topLevelDecisionOf(value: string | undefined): HookOutput['decision'] { + return value === 'approve' || value === 'block' ? value : undefined +} + +/** A `hookSpecificOutput.permissionDecision` is `allow`/`deny`/`ask` only. */ +function permissionDecisionOf(value: string | undefined): HookOutput['decision'] { + return value === 'allow' || value === 'deny' || value === 'ask' ? value : undefined } /** @@ -62,7 +67,11 @@ function decisionOf(value: string | undefined): HookOutput['decision'] { */ export function parseHookOutput(exitCode: number | undefined, stdout: string, stderr: string): HookOutput { const trimmedErr = stderr.trim() - const output: HookOutput = { exitCode, stderr: trimmedErr } + const trimmedOut = stdout.trim() + // Keep the raw stdout verbatim: a clean-exit hook may emit PLAIN text the + // protocol renders/uses (CC output; Codex SessionStart/UserPromptSubmit + // additionalContext), so the bridge needs it even when there's no JSON. + const output: HookOutput = { exitCode, stderr: trimmedErr, stdout: trimmedOut } // Exit 2 is a blocking error in both dialects: stderr is the reason. Surface // it as a `block` decision so the bridge maps it uniformly with a structured @@ -76,7 +85,6 @@ export function parseHookOutput(exitCode: number | undefined, stdout: string, st // the stderr channel is authoritative. A non-zero/undefined exit other than 2 // carries no decision (the bridge records it as a non-blocking error). if (exitCode === 0) { - const trimmedOut = stdout.trim() // Only attempt JSON when stdout looks like a JSON object — matches the // reference engines, which treat other stdout as plain text, not an error. if (trimmedOut.startsWith('{')) { @@ -106,18 +114,23 @@ function applyStructured(output: HookOutput, parsed: Record): v const sysMsg = str(parsed, 'systemMessage') if (sysMsg !== undefined) output.systemMessage = sysMsg - // Top-level legacy `decision` + `reason` (CC approve/block; Codex block). - const topDecision = decisionOf(str(parsed, 'decision')) + // Top-level legacy `decision` (approve/block ONLY — allow/deny/ask there are + // invalid per both schemas) + its `reason`. + const topDecision = topLevelDecisionOf(str(parsed, 'decision')) if (topDecision !== undefined) output.decision = topDecision const topReason = str(parsed, 'reason') if (topReason !== undefined) output.reason = topReason - // hookSpecificOutput: the per-event channel. permissionDecision (allow/deny/ - // ask) OVERRIDES the legacy top-level decision when present; additionalContext - // and updatedInput live here too. + // hookSpecificOutput: the per-event channel, keyed by `hookEventName`. We + // surface that discriminator so the bridge can DISCARD a block whose event + // doesn't match the firing one (the schemas make it the discriminator). The + // permissionDecision (allow/deny/ask) OVERRIDES the legacy top-level decision; + // additionalContext and updatedInput live here too. const hso = obj(parsed.hookSpecificOutput) if (hso) { - const permission = decisionOf(str(hso, 'permissionDecision')) + const eventName = str(hso, 'hookEventName') + if (eventName !== undefined) output.hookEventName = eventName + const permission = permissionDecisionOf(str(hso, 'permissionDecision')) if (permission !== undefined) output.decision = permission const permissionReason = str(hso, 'permissionDecisionReason') if (permissionReason !== undefined) output.reason = permissionReason diff --git a/packages/hooks/hook-protocol/src/types.ts b/packages/hooks/hook-protocol/src/types.ts index a06ae7f837..dbc4b57aab 100644 --- a/packages/hooks/hook-protocol/src/types.ts +++ b/packages/hooks/hook-protocol/src/types.ts @@ -100,6 +100,14 @@ export interface HookOutput { exitCode: number | undefined /** Trimmed stderr — the block-reason source on a blocking (exit 2) hook. */ stderr: string + /** + * Trimmed stdout, verbatim. On a clean exit a hook may emit PLAIN (non-JSON) + * stdout that the protocol renders as output (CC) or treats as + * `additionalContext` (Codex SessionStart/UserPromptSubmit) — so the bridge + * needs the raw text, not just the parsed structured fields. Empty string when + * the hook produced no stdout. + */ + stdout: string /** * `false` ⇒ the hook asked to halt (CC/Codex `continue:false`); pairs with * {@link stopReason}. `true`/absent ⇒ proceed. @@ -110,14 +118,26 @@ export interface HookOutput { /** Hide the hook's stdout from the transcript (CC `suppressOutput`). */ suppressOutput?: boolean /** - * The blocking decision a hook expressed via structured stdout (CC's - * `decision` / `hookSpecificOutput.permissionDecision`): `'block'`/`'deny'` - * forbid the action, `'approve'`/`'allow'` permit it, `'ask'` requests - * confirmation. Absent ⇒ no explicit decision (exit code governs). + * The neutral blocking decision a hook expressed, folded from the two channels + * the reference protocols keep DISTINCT: the legacy top-level `decision` + * (`approve`/`block` only) and `hookSpecificOutput.permissionDecision` + * (`allow`/`deny`/`ask`). We normalize them to one enum — `'block'`/`'deny'` + * forbid, `'approve'`/`'allow'` permit, `'ask'` requests confirmation — but + * `'allow'`/`'deny'`/`'ask'` arise ONLY from a `permissionDecision`, never from + * a top-level `decision` (an out-of-band `{"decision":"deny"}` is invalid and + * ignored, matching the schemas). Absent ⇒ no explicit decision (exit code governs). */ decision?: 'approve' | 'allow' | 'block' | 'deny' | 'ask' /** The reason/explanation accompanying {@link decision}. */ reason?: string + /** + * The `hookSpecificOutput.hookEventName` discriminator, when the hook emitted + * a `hookSpecificOutput` block. The reference schemas key that block by event; + * a bridge compares this to the firing event and DISCARDS a mismatched block + * (a hook claiming `PreToolUse` output on a `Stop` event is malformed). Absent + * when the hook emitted no `hookSpecificOutput`. + */ + hookEventName?: string /** Extra context to inject for the next model request (CC `additionalContext`). */ additionalContext?: string /** A warning surfaced to the user (CC `systemMessage`). */ diff --git a/packages/hooks/hook-protocol/tests/codec.spec.ts b/packages/hooks/hook-protocol/tests/codec.spec.ts index 41976aeab9..7964745056 100644 --- a/packages/hooks/hook-protocol/tests/codec.spec.ts +++ b/packages/hooks/hook-protocol/tests/codec.spec.ts @@ -48,11 +48,25 @@ describe('parseHookOutput — structured stdout (exit 0 only)', () => { expect(out.systemMessage).toBe('heads up') }) - it('parses legacy top-level decision + reason (approve/block)', () => { + it('parses legacy top-level decision + reason (approve/block ONLY)', () => { expect(parseHookOutput(0, JSON.stringify({ decision: 'block', reason: 'nope' }), '').decision).toBe('block') expect(parseHookOutput(0, JSON.stringify({ decision: 'approve' }), '').decision).toBe('approve') }) + it('a top-level decision of allow/deny/ask is INVALID and ignored (reserved for permissionDecision)', () => { + // Both reference schemas restrict the legacy top-level `decision` to + // approve/block; allow/deny/ask must come from hookSpecificOutput.permissionDecision. + expect(parseHookOutput(0, JSON.stringify({ decision: 'deny' }), '').decision).toBeUndefined() + expect(parseHookOutput(0, JSON.stringify({ decision: 'allow' }), '').decision).toBeUndefined() + expect(parseHookOutput(0, JSON.stringify({ decision: 'ask' }), '').decision).toBeUndefined() + }) + + it('captures hookEventName from hookSpecificOutput (the discriminator a bridge validates)', () => { + const out = parseHookOutput(0, JSON.stringify({ hookSpecificOutput: { hookEventName: 'PreToolUse', permissionDecision: 'deny' } }), '') + expect(out.hookEventName).toBe('PreToolUse') + expect(out.decision).toBe('deny') + }) + it('hookSpecificOutput.permissionDecision OVERRIDES the legacy top-level decision', () => { const out = parseHookOutput(0, JSON.stringify({ decision: 'approve', @@ -89,6 +103,20 @@ describe('parseHookOutput — structured stdout (exit 0 only)', () => { const out = parseHookOutput(0, 'just some text output', '') expect(out.decision).toBeUndefined() expect(out.continue).toBeUndefined() + // The raw stdout is preserved verbatim so the bridge can render/use it + // (CC output; Codex additionalContext) — trimmed. + expect(out.stdout).toBe('just some text output') + }) + + it('preserves raw stdout (trimmed) alongside parsed structured fields', () => { + const json = JSON.stringify({ decision: 'block' }) + const out = parseHookOutput(0, ` ${json} \n`, '') + expect(out.stdout).toBe(json) + expect(out.decision).toBe('block') + }) + + it('stdout is empty string when the hook emits none', () => { + expect(parseHookOutput(0, '', '').stdout).toBe('') }) it('a JSON array stdout parses but yields no fields (not an object)', () => { diff --git a/packages/hooks/hook-protocol/tests/merge.spec.ts b/packages/hooks/hook-protocol/tests/merge.spec.ts index 6e52d15020..9709060d79 100644 --- a/packages/hooks/hook-protocol/tests/merge.spec.ts +++ b/packages/hooks/hook-protocol/tests/merge.spec.ts @@ -3,7 +3,7 @@ import { mergeHookOutputs } from '@deepseek-ai/dsh-hook-protocol' import type { HookOutput } from '@deepseek-ai/dsh-hook-protocol' function out(over: Partial = {}): HookOutput { - return { exitCode: 0, stderr: '', ...over } + return { exitCode: 0, stderr: '', stdout: '', ...over } } describe('mergeHookOutputs — permission precedence deny > ask > allow', () => { diff --git a/packages/hooks/hook-protocol/tests/runner.spec.ts b/packages/hooks/hook-protocol/tests/runner.spec.ts index cfa7a76ab0..698d6e0fa3 100644 --- a/packages/hooks/hook-protocol/tests/runner.spec.ts +++ b/packages/hooks/hook-protocol/tests/runner.spec.ts @@ -6,8 +6,8 @@ import { runHook } from '@deepseek-ai/dsh-hook-protocol' * A minimal stand-in for the bits of {@link BashExecutor} that {@link runHook} * actually calls (`resolve` then `run`). `runHook` is pure plumbing over those * two methods, so a duck-typed recorder is the right test seam — the REAL - * executor (dsh-bash-local) is exercised end-to-end by the bridge e2e tests in - * PR-F, not here. + * executor (dsh-bash-local) is exercised end-to-end by the hook-bridge plugins + * that consume this library, not here. */ function recordingBash(run: (spec: BashExecSpec) => Promise): { bash: BashExecutor From c28d6b837b53f77f09426c80688c511bd94cd478 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 02:20:12 +0800 Subject: [PATCH 14/47] fix(hooks): merge surfaces the WINNING decision's reason, not only deny's MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit mergeHookOutputs collected reasons only from rank-3 (deny/block) hooks, so an ask-winning outcome lost its reason — a bridge mapping an `ask` decision to a PreToolDecision had no reason to attach. Collect reasons per rank and emit the ones explaining the winning decision: a deny-winning fold shows deny reasons, an ask-winning fold shows ask reasons, allow contributes none. Found while building the hooks-claude bridge's PreToolUse `ask` path. --- packages/hooks/hook-protocol/src/merge.ts | 15 +++++++++++---- .../hooks/hook-protocol/tests/merge.spec.ts | 18 ++++++++++++++++++ 2 files changed, 29 insertions(+), 4 deletions(-) diff --git a/packages/hooks/hook-protocol/src/merge.ts b/packages/hooks/hook-protocol/src/merge.ts index d8fb158eb1..1e53dbaaea 100644 --- a/packages/hooks/hook-protocol/src/merge.ts +++ b/packages/hooks/hook-protocol/src/merge.ts @@ -74,7 +74,11 @@ function decisionForRank(maxRank: number): MergedDecision { */ export function mergeHookOutputs(outputs: HookOutput[]): MergedHookOutcome { let maxRank = 0 - const reasons: string[] = [] + // Reasons collected PER RANK, so the merged reason can be the one explaining + // the WINNING decision (a deny-winning outcome surfaces deny reasons; an + // ask-winning outcome surfaces ask reasons). An `allow`'s reason is never an + // objection the model needs, so rank 1 collects none. + const reasonsByRank = new Map() let stop = false let stopReason: string | undefined const additionalContext: string[] = [] @@ -83,9 +87,11 @@ export function mergeHookOutputs(outputs: HookOutput[]): MergedHookOutcome { for (const out of outputs) { const r = rank(out.decision) if (r > maxRank) maxRank = r - // Collect a reason only from a blocking/denying hook (rank 3) — an allow's - // "reason" is not an objection the model needs to see. - if (r === 3 && out.reason !== undefined && out.reason.length > 0) reasons.push(out.reason) + if ((r === 3 || r === 2) && out.reason !== undefined && out.reason.length > 0) { + const list = reasonsByRank.get(r) ?? [] + list.push(out.reason) + reasonsByRank.set(r, list) + } if (out.continue === false && !stop) { stop = true if (out.stopReason !== undefined) stopReason = out.stopReason @@ -98,6 +104,7 @@ export function mergeHookOutputs(outputs: HookOutput[]): MergedHookOutcome { } } + const reasons = reasonsByRank.get(maxRank) ?? [] return { decision: decisionForRank(maxRank), ...reasons.length > 0 ? { reason: reasons.join('\n\n') } : {}, diff --git a/packages/hooks/hook-protocol/tests/merge.spec.ts b/packages/hooks/hook-protocol/tests/merge.spec.ts index 9709060d79..def2474927 100644 --- a/packages/hooks/hook-protocol/tests/merge.spec.ts +++ b/packages/hooks/hook-protocol/tests/merge.spec.ts @@ -47,6 +47,24 @@ describe('mergeHookOutputs — reasons, stop, context, systemMessages accumulate expect(mergeHookOutputs([out({ decision: 'allow' })]).reason).toBeUndefined() }) + it('surfaces the reason of the WINNING decision: an ask-winning outcome shows the ask reason', () => { + const m = mergeHookOutputs([ + out({ decision: 'allow', reason: 'allow reason — not surfaced' }), + out({ decision: 'ask', reason: 'needs approval' }), + ]) + expect(m.decision).toBe('ask') + expect(m.reason).toBe('needs approval') + }) + + it('when deny wins over ask, the ask reasons are dropped (only the winning rank\'s reasons)', () => { + const m = mergeHookOutputs([ + out({ decision: 'ask', reason: 'ask reason — not surfaced once deny wins' }), + out({ decision: 'deny', reason: 'the real objection' }), + ]) + expect(m.decision).toBe('deny') + expect(m.reason).toBe('the real objection') + }) + it('stop is sticky on the first continue:false, capturing its stopReason', () => { const m = mergeHookOutputs([ out({ continue: true }), From 8adcbceeedeb712352f076608e60ab4735cd6cf4 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 04:22:00 +0800 Subject: [PATCH 15/47] feat(hooks): dsh-hooks-claude + dsh-hooks-codex bridges (hooks stack PR-F) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The two bridge plugins that run a user's existing Claude Code / Codex hook config on the harness's typed interception seams, built on the shared dsh-hook-protocol library. A bridge is a faithfulness adapter, not a power tool: anything it does a native cordis plugin does more powerfully — the bridge exists only to run UNMODIFIED external hooks. - dsh-hooks-claude: CC dialect. Seven hook points (SessionStart, UserPromptSubmit, PreToolUse, PostToolUse, Stop, SubagentStart, SubagentStop), CC per-event stdin payloads, env + ${CLAUDE_PLUGIN_ROOT}/ ${CLAUDE_PROJECT_DIR} substitution, literal-or-regex matcher. - dsh-hooks-codex: Codex dialect — a deliberate subset. Five hook points, always-regex matcher, snake_case payloads (turn_id/model, no trailing newline), no env/substitution, block-only decisions. Both map the neutral merged outcome onto the seam's typed Decision and stamp an explicit {kind:'plugin'} source on injected context (so it is never mislabeled as a user prompt). Config parse-failure is contained; only command hooks run. updatedInput is logged+warned (input rewrite deferred); the Stop loop-guard is deferred (TODO). Tests: per-file 100% — config-parse unit branches + per-seam mappings end-to-end through the REAL loop + REAL bash + REAL shell scripts (scripted mock model only) + a real-Loader export-shape guard. A keyless ACP snapshot scenario (hook-prompt-block) proves a UserPromptSubmit hook blocks a prompt end-to-end (rejected turn -> ACP cancelled, hook/* events in the log); a with-key e2e (hooks.e2e.ts) proves a PreToolUse hook blocks real bash (verified on disk). The snapshot normalizer now scrubs hook/result.durationMs. RFC: docs/rfc/implemented/feature/2026-06-30-hook-bridges.md --- AGENTS.md | 6 + docs/module-graph.md | 13 + docs/rfc/README.md | 1 + .../feature/2026-06-30-hook-bridges.md | 51 +++ examples/AGENTS.md | 2 +- examples/acp-agent/cordis.snapshot.yml | 10 + examples/acp-agent/cordis.yml | 10 + examples/acp-agent/tests/acp.snapshot.ts | 24 +- examples/acp-agent/tests/hooks.e2e.ts | 119 +++++ .../tests/snapshot-normalize.spec.ts | 17 + .../acp-agent/tests/snapshot-normalize.ts | 10 +- .../snapshots/hook-prompt-block/input.json | 7 + .../snapshots/hook-prompt-block/session.jsonl | 5 + .../hook-prompt-block/stdout.golden.jsonl | 3 + .../hook-prompt-block/workspace/hooks.json | 11 + packages/README.md | 2 + packages/hooks/hooks-claude/README.md | 51 +++ packages/hooks/hooks-claude/package.json | 49 +++ packages/hooks/hooks-claude/src/config.ts | 100 +++++ packages/hooks/hooks-claude/src/index.ts | 300 +++++++++++++ .../hooks/hooks-claude/tests/bridge.spec.ts | 335 +++++++++++++++ .../hooks/hooks-claude/tests/config.spec.ts | 66 +++ .../hooks/hooks-claude/tests/coverage.spec.ts | 405 ++++++++++++++++++ packages/hooks/hooks-claude/tsconfig.json | 42 ++ packages/hooks/hooks-codex/README.md | 54 +++ packages/hooks/hooks-codex/package.json | 47 ++ packages/hooks/hooks-codex/src/config.ts | 79 ++++ packages/hooks/hooks-codex/src/index.ts | 235 ++++++++++ .../hooks/hooks-codex/tests/bridge.spec.ts | 167 ++++++++ .../hooks/hooks-codex/tests/config.spec.ts | 68 +++ .../hooks/hooks-codex/tests/coverage.spec.ts | 308 +++++++++++++ packages/hooks/hooks-codex/tsconfig.json | 39 ++ pnpm-lock.yaml | 77 ++++ tsconfig.build.json | 4 +- tsconfig.json | 4 +- 35 files changed, 2714 insertions(+), 7 deletions(-) create mode 100644 docs/rfc/implemented/feature/2026-06-30-hook-bridges.md create mode 100644 examples/acp-agent/tests/hooks.e2e.ts create mode 100644 examples/acp-agent/tests/snapshots/hook-prompt-block/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-prompt-block/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-prompt-block/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-prompt-block/workspace/hooks.json create mode 100644 packages/hooks/hooks-claude/README.md create mode 100644 packages/hooks/hooks-claude/package.json create mode 100644 packages/hooks/hooks-claude/src/config.ts create mode 100644 packages/hooks/hooks-claude/src/index.ts create mode 100644 packages/hooks/hooks-claude/tests/bridge.spec.ts create mode 100644 packages/hooks/hooks-claude/tests/config.spec.ts create mode 100644 packages/hooks/hooks-claude/tests/coverage.spec.ts create mode 100644 packages/hooks/hooks-claude/tsconfig.json create mode 100644 packages/hooks/hooks-codex/README.md create mode 100644 packages/hooks/hooks-codex/package.json create mode 100644 packages/hooks/hooks-codex/src/config.ts create mode 100644 packages/hooks/hooks-codex/src/index.ts create mode 100644 packages/hooks/hooks-codex/tests/bridge.spec.ts create mode 100644 packages/hooks/hooks-codex/tests/config.spec.ts create mode 100644 packages/hooks/hooks-codex/tests/coverage.spec.ts create mode 100644 packages/hooks/hooks-codex/tsconfig.json diff --git a/AGENTS.md b/AGENTS.md index 020447fe7a..6890111fe9 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -81,6 +81,12 @@ packages/ Harness packages, grouped by role at packages///. hook-protocol/ shared Claude Code / Codex hook wire-protocol core (library, not a plugin): matcher primitive, exit-code/stdout codec, runHook (via ctx.bash), most-restrictive merge, hook/* events + hooks-claude/ bridge plugin: runs a Claude Code hooks.json / settings on the + interception seams (CC dialect — env + ${CLAUDE_PLUGIN_ROOT} + substitution, per-event stdin payloads, outcome→Decision map) + hooks-codex/ bridge plugin: runs a Codex hooks.json on the seams (Codex + dialect — a 5-event, regex-only, block-only, no-substitution + subset of the CC protocol) session-persistence/ persistence capability family session-persistence/ durable persistence seam + write coordinator session-persistence-jsonl/ JSONL-sidecar backend diff --git a/docs/module-graph.md b/docs/module-graph.md index 3f64c7731e..1ca1856032 100644 --- a/docs/module-graph.md +++ b/docs/module-graph.md @@ -49,6 +49,11 @@ graph TD agent-loop --> session-persistence agent-loop --> system-prompt agent-loop --> tools + hooks-codex --> agent + hooks-codex --> hook-protocol + hooks-codex --> llm + hooks-codex --> session + hooks-codex --> tools subagent --> agent subagent --> llm subagent --> tools @@ -67,6 +72,12 @@ graph TD agent-core --> system-prompt agent-core --> tool-bash agent-core --> tools + hooks-claude --> agent + hooks-claude --> hook-protocol + hooks-claude --> llm + hooks-claude --> session + hooks-claude --> subagent + hooks-claude --> tools subagent-acp --> agent subagent-acp --> llm subagent-acp --> subagent @@ -119,10 +130,12 @@ graph TD | `ui-stdio` | `agent`, `llm`, `session` | | `acp` | `agent`, `llm`, `session`, `session-persistence`, `tools` | | `agent-loop` | `agent`, `llm`, `session`, `session-persistence`, `system-prompt`, `tools` | +| `hooks-codex` | `agent`, `hook-protocol`, `llm`, `session`, `tools` | | `subagent` | `agent`, `llm`, `tools` | | `tool-bash` | `agent`, `bash`, `llm`, `tools` | | `tool-todo` | `agent`, `session`, `tools` | | `agent-core` | `agent`, `agent-loop`, `invariants`, `llm`, `session`, `system-prompt`, `tool-bash`, `tools` | +| `hooks-claude` | `agent`, `hook-protocol`, `llm`, `session`, `subagent`, `tools` | | `subagent-acp` | `agent`, `llm`, `subagent` | | `subagent-inprocess` | `agent`, `llm`, `session`, `subagent` | | `subagent-mock` | `agent`, `llm`, `subagent` | diff --git a/docs/rfc/README.md b/docs/rfc/README.md index fbeb6966e7..5824986ae8 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -90,6 +90,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Interception seams — the typed-Decision surface a hook programs against](implemented/feature/2026-06-30-interception-seams.md) | 2026-06-30 | | [Subagent lifecycle enrichment — agentType + lastAssistantMessage (observe-only)](implemented/feature/2026-06-30-subagent-observe-enrich.md) | 2026-06-30 | | [dsh-hook-protocol — the shared Claude Code / Codex hook wire-protocol core](implemented/feature/2026-06-30-hook-protocol-lib.md) | 2026-06-30 | +| [dsh-hooks-claude + dsh-hooks-codex — the Claude Code / Codex hook bridges](implemented/feature/2026-06-30-hook-bridges.md) | 2026-06-30 | ### Simplification diff --git a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md new file mode 100644 index 0000000000..a3e01c17be --- /dev/null +++ b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md @@ -0,0 +1,51 @@ +# RFC: dsh-hooks-claude + dsh-hooks-codex — the Claude Code / Codex hook bridges + +Status: implemented (accepted 2026-06-30) + + + +## Context + +The harness's extension surface is its typed interception seams ([the interception-seams RFC](2026-06-30-interception-seams.md)): a "native hook" is just an ordinary cordis plugin subscribing to `agent/session-start`, `agent/prompt-submit`, `tools/pre-execute`, `tools/post-execute`, `agent/turn-continuation`, `subagent/start`, `subagent/end`. But users arrive with **existing** Claude Code (CC) and Codex hook configs — a `hooks.json` (or a settings file's `hooks` key) full of shell-command hooks — and want those to run unmodified. This RFC introduces the two **bridge plugins** that translate that external shell-hook protocol onto the typed seams, built on the shared wire-protocol library ([the hook-protocol-lib RFC](2026-06-30-hook-protocol-lib.md)). + +The framing that shapes the whole design: **a bridge is a faithfulness adapter, not a power tool.** Anything a bridge does (block a tool, inject context, force continuation, observe a subagent) a native cordis plugin does more powerfully — typed returns, full `ctx`, no serialization boundary. The bridge's only reason to exist is to run an UNMODIFIED external CC/Codex hook with byte-faithful semantics. That keeps each bridge thin: parse the config, pick a matcher mode, build the per-event payload, call `runHook` + `mergeHookOutputs` from the shared lib, map the neutral outcome onto a seam Decision. + +## Decision + +Two independent plugins in the `packages/hooks/` group, each a function/namespace plugin (`name`/`inject`/`Config`/`apply`, NO default export — see [postmortem 0001](../../../postmortem/0001-acp-default-export-drops-inject.md)) injecting only `bash`: + +- **`dsh-hooks-claude`** — the CC dialect. Seven hook points: `SessionStart`, `UserPromptSubmit`, `PreToolUse`, `PostToolUse`, `Stop`, `SubagentStart`, `SubagentStop`. Owns CC's per-event stdin payloads (a base of `session_id`/`cwd`/`hook_event_name` plus per-event fields), CC's env + `${CLAUDE_PLUGIN_ROOT}`/`${CLAUDE_PROJECT_DIR}` substitution, and the literal-or-regex matcher mode. A CC hook's stdin carries a **trailing newline**. +- **`dsh-hooks-codex`** — the Codex dialect: a deliberate SUBSET. Five hook points (`PreToolUse`, `PostToolUse`, `SessionStart`, `UserPromptSubmit`, `Stop` — no subagent/notification/compaction), an always-regex matcher, snake_case payloads with `turn_id`/`model`/`permission_mode` extras written WITHOUT a trailing newline, no env and no `${…}` substitution, and a block-only decision model (a Codex hook can never pre-approve, so `allow`/`ask` are not honored). Codex hardcodes a tool call's `tool_name` to `"Bash"` and `tool_input` to `{ command }`. + +### Outcome → Decision mapping + +Each bridge maps the neutral `MergedHookOutcome` from the shared lib onto the seam's typed Decision: + +| Seam | CC | Codex | +|---|---|---| +| `agent/session-start` (emit) | additionalContext → `agent.inject()` | plain-stdout output → additionalContext → `agent.inject()` | +| `agent/prompt-submit` | `deny`→`block`; context→`allow` | `block`→`block`; context→`allow` | +| `tools/pre-execute` | `deny`→`deny`; `ask`→`ask` | `block`→`deny` (no allow/ask) | +| `tools/post-execute` | `deny`→`block`+feedback; context→`accept` | same | +| `agent/turn-continuation` | blocking Stop → `continue` (reason = next-step steering) | same | +| `subagent/start` (emit) | additionalContext → inject into the live child | — (not a Codex event) | +| `subagent/end` (emit) | observe-only | — | + +### Context source is always the plugin (the mislabel guard) + +`agent.inject()` defaults a missing `MessageSource` to `{ kind: 'user' }` — which would record plugin-injected context as if the user had typed it. So every bridge `inject()` and every `HookContext` passes an explicit `{ kind: 'plugin', plugin: 'hooks-claude' | 'hooks-codex' }` source. A test asserts the resulting `context/message.source` is the plugin, never `user`. + +### Containment + +The config is parsed ONCE at load; a read/parse failure logs and registers nothing rather than crashing boot (a typo'd path must not take the agent down). Only `type: 'command'` hooks run — a `prompt`/`agent`/HTTP hook (CC) or an `async: true` / non-command hook (Codex) is parsed-and-skipped with a warning. The emit-listener paths (`session-start`, `subagent/start`) run detached, with their `inject` contained in a `.catch` that logs (a throwing inject must not break session boot or the loop). + +## Deferred (faithful-but-degraded) + +- **Tool-input rewrite.** A CC/Codex `updatedInput` is logged + warned, not honored — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite RFC](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)), because the pre-execution args are read by `tool/call` audit + `assistant/message` history + ACP/tool-bash presentation, so an honest rewrite is a design unit, not a field. +- **Stop loop-guard** (`TODO(stop-loop-guard)`). CC/Codex break an infinite force-continue with `stop_hook_active` (true once a Stop hook fired this run) plus a max-consecutive cap; both are deferred. Today `stop_hook_active` is always `false`, so a Stop hook that unconditionally blocks would force-continue every step — a hook author must self-limit until the guard lands. +- **Permission `ask`** degrades to `deny` at the `tools/pre-execute` seam (`FIXME(permissions)` in the interception-seams RFC) — there is no interactive permission prompt yet. +- **Config discovery.** The path is explicit in `cordis.yml`; the full multi-layer CC/Codex precedence walk and the trust/hash model are not reimplemented (`TODO`). + +## Consequences + +The bridges are thin and readable standalone: the correctness-critical halves (matcher semantics, exit-code contract, merge precedence) live in the shared `dsh-hook-protocol`, so each bridge is just config-parse + payload-build + outcome-map. Each is covered at per-file 100% — config-parse branches as unit tests, and the seam mappings end-to-end through the REAL loop + REAL `dsh-bash-local` + REAL shell scripts from a temp `hooks.json` (a scripted mock MODEL is the only stand-in), plus a real-Loader export-shape guard so a stray default export can't silently drop `inject`. Because the seams already carry typed Decisions, a future native plugin needs none of this bridge machinery — it returns a Decision directly. diff --git a/examples/AGENTS.md b/examples/AGENTS.md index c104c2cd8e..903f59781c 100644 --- a/examples/AGENTS.md +++ b/examples/AGENTS.md @@ -21,6 +21,6 @@ A keyless smoke that spawns the example from a temp cwd must set `TSX_TSCONFIG_P |---|---|---| | `echo-agent` | `tests/echo.e2e.ts` — boots the real `cordis.yml`, drives the echo tool round-trip and the direct canned reply | **N/A — keyless by nature** (the `mock-echo` model has no real provider) | | `coding-agent` | `tests/keyless-smoke.e2e.ts` — boots the full real tree (dummy key, no prompt → no model call), asserts banner + clean exit | `tests/{full-loop,coding-task,resume,todo-write}.e2e.ts` — real model + real bash + real todo_write, world-verified | -| `acp-agent` | `pnpm run test:snapshot` — boots the real ACP subprocess and replays a recorded session keyless; `tests/acp.e2e.ts` also asserts stdout purity without a key | `tests/acp.e2e.ts` — real ACP prompt, verifies a file the agent wrote | +| `acp-agent` | `pnpm run test:snapshot` — boots the real ACP subprocess and replays a recorded session keyless (incl. `hook-prompt-block`, where a `UserPromptSubmit` hook blocks the prompt); `tests/acp.e2e.ts` also asserts stdout purity without a key | `tests/acp.e2e.ts` — real ACP prompt, verifies a file the agent wrote; `tests/hooks.e2e.ts` — a real `PreToolUse` hook blocks bash, verifies the file is NOT written | See [the root AGENTS.md](../AGENTS.md) for repo-wide conventions and [docs/architecture.md](../docs/architecture.md) for the design. diff --git a/examples/acp-agent/cordis.snapshot.yml b/examples/acp-agent/cordis.snapshot.yml index 90c8dd2daf..fc7d81298b 100644 --- a/examples/acp-agent/cordis.snapshot.yml +++ b/examples/acp-agent/cordis.snapshot.yml @@ -83,3 +83,13 @@ # replayed todo_write tool call resolves to a real tool during snapshot replay. - id: tool-todo name: '@deepseek-ai/dsh-tool-todo' + +# The Claude Code hook bridge, pointed at a `hooks.json` in the session cwd. A +# scenario that ships `workspace/hooks.json` (copied into the cwd before the run) +# exercises the hooks path end-to-end; every other scenario has no such file, so +# the bridge's parse fails-soft and it registers nothing (a silent no-op — the +# ACP app loads no logger exporter, so the warning never reaches stdout). +- id: hooks-claude + name: '@deepseek-ai/dsh-hooks-claude' + config: + configPath: ./hooks.json diff --git a/examples/acp-agent/cordis.yml b/examples/acp-agent/cordis.yml index 96071ab564..6e299e1c74 100644 --- a/examples/acp-agent/cordis.yml +++ b/examples/acp-agent/cordis.yml @@ -94,3 +94,13 @@ # session log (todo/write), surfaced to the ACP client as a `plan` update. - id: tool-todo name: '@deepseek-ai/dsh-tool-todo' + +# The Claude Code hook bridge, pointed at a `hooks.json` in the session cwd. With +# no such file present the parse fails-soft and the bridge registers nothing (a +# silent no-op); a session whose cwd holds a `hooks.json` runs those hooks on the +# interception seams. stdout is the ACP JSON-RPC channel — the bridge's warnings +# go through ctx.logger (no exporter here), never to stdout. +- id: hooks-claude + name: '@deepseek-ai/dsh-hooks-claude' + config: + configPath: ./hooks.json diff --git a/examples/acp-agent/tests/acp.snapshot.ts b/examples/acp-agent/tests/acp.snapshot.ts index 94f18e64d3..b59b454a51 100644 --- a/examples/acp-agent/tests/acp.snapshot.ts +++ b/examples/acp-agent/tests/acp.snapshot.ts @@ -29,12 +29,22 @@ interface Scenario { name: string /** Whether the scenario drives at least one model turn (so a JSONL golden applies). */ hasModelTurn: boolean + /** + * Whether the run persists a comparable session log to diff against the + * `session.jsonl` fixture. Defaults to {@link hasModelTurn} (a model turn + * always produces a log worth comparing). Set it independently for a scenario + * that produces a non-trivial log WITHOUT a model turn — e.g. a prompt blocked + * by a `UserPromptSubmit` hook, which opens a `rejected` turn carrying `hook/*` + * events but never calls the model. + */ + comparesLog?: boolean /** * Whether `test:snapshot:record` regenerates this scenario's `session.jsonl` * from the LIVE API. `recorded` scenarios are model-driven and reproducible; * `authored` scenarios (a hand-written `replay.override.json` sidecar drives * replay — e.g. a provider error or a cancel, which the live API can't be - * coaxed into deterministically) are NEVER re-recorded. + * coaxed into deterministically — or a deterministic hook scenario whose + * derived empty script needs no sidecar) are NEVER re-recorded. */ recorded: boolean /** @@ -61,6 +71,11 @@ const SCENARIOS: Scenario[] = [ { name: 'subagent-multi', hasModelTurn: true, recorded: true, childSessions: 2 }, { name: 'subagent-fork', hasModelTurn: true, recorded: true, childSessions: 1 }, { name: 'subagent-mixed', hasModelTurn: true, recorded: true, childSessions: 2 }, + // A UserPromptSubmit hook blocks the prompt before any step runs: no model + // call (keyless, authored — its derived script is empty so it needs no + // sidecar), but it persists a `rejected` turn carrying `hook/*` events, so its + // log IS compared. The hooks.json riding in workspace/ drives the bridge. + { name: 'hook-prompt-block', hasModelTurn: false, comparesLog: true, recorded: false }, ] /** The sibling child-fixture paths for a scenario (`session.1.jsonl` …). */ @@ -139,12 +154,15 @@ for (const scenario of SCENARIOS) { await expect(normalizeStdout(result.rawStdout, ctx)) .toMatchFileSnapshot(join(dir, 'stdout.golden.jsonl')) - if (scenario.hasModelTurn) { + // A model turn always produces a log worth comparing; a hook scenario can + // produce one without a model turn (a `rejected` turn carrying `hook/*`). + const comparesLog = scenario.comparesLog ?? scenario.hasModelTurn + if (comparesLog) { // The harvested logs (primary-first) must match their committed fixtures // 1:1. Each side passes through normalizeSessionLog, scrubbed against ITS // OWN volatile values — the live run's via `ctx`, the committed fixture's // via its own header (a committed file cannot share the live run's ids). - expect(result.sessionLogs.length, 'a model scenario must persist a session log').toBe(childSessions + 1) + expect(result.sessionLogs.length, 'this scenario must persist a session log').toBe(childSessions + 1) const fixtureFiles = ['session.jsonl', ...Array.from({ length: childSessions }, (_, i) => `session.${i + 1}.jsonl`)] for (let i = 0; i < fixtureFiles.length; i++) { const harvested = (result.sessionLogs[i] as HarvestedLog).content diff --git a/examples/acp-agent/tests/hooks.e2e.ts b/examples/acp-agent/tests/hooks.e2e.ts new file mode 100644 index 0000000000..19a80df03c --- /dev/null +++ b/examples/acp-agent/tests/hooks.e2e.ts @@ -0,0 +1,119 @@ +import { spawn, type ChildProcessWithoutNullStreams } from 'node:child_process' +import { Readable, Writable } from 'node:stream' +import { mkdtemp, rm, writeFile, access } from 'node:fs/promises' +import { tmpdir } from 'node:os' +import { join } from 'node:path' +import { fileURLToPath } from 'node:url' +import { afterEach, describe, expect, it } from 'vitest' +import { + ClientSideConnection, + ndJsonStream, + PROTOCOL_VERSION, + type Agent as AcpAgent, + type Client, + type RequestPermissionRequest, + type RequestPermissionResponse, + type SessionNotification, +} from '@agentclientprotocol/sdk' + +/** + * With-key e2e: the Claude Code hook bridge running against the REAL acp-agent + * subprocess and the REAL model. The example `cordis.yml` loads `dsh-hooks-claude` + * pointed at `./hooks.json` in the session cwd; this test writes a `hooks.json` + * with a PreToolUse hook that BLOCKS every bash command, then asks the live model + * to write a file — and verifies the WORLD (the file never appears on disk), + * proving the hook actually intercepted execution rather than the agent merely + * claiming it couldn't. Key-gated; owns and disposes its subprocess. + * + * A keyless companion lives in acp.e2e.ts (stdout purity + session/new); the + * full hook-fires-end-to-end transcript is the keyless `hook-prompt-block` + * snapshot scenario. This one closes the "green plumbing, broken product" gap: + * only a real model deciding to call bash exercises the PreToolUse seam live. + */ + +const binScript = fileURLToPath(new URL('../../../packages/ui/acp-agent/src/bin.ts', import.meta.url)) +const configPath = fileURLToPath(new URL('../cordis.yml', import.meta.url)) +const tsxLoader = fileURLToPath(import.meta.resolve('tsx')) +const repoTsconfig = fileURLToPath(new URL('../../../tsconfig.json', import.meta.url)) + +interface Spawned { + child: ChildProcessWithoutNullStreams + client: ClientSideConnection + updates: SessionNotification['update'][] + stderr: string[] +} + +function spawnAcpAgent(cwd: string): Spawned { + const child = spawn( + process.execPath, + ['--import', tsxLoader, binScript, configPath], + { cwd, env: { ...process.env, TSX_TSCONFIG_PATH: repoTsconfig }, stdio: ['pipe', 'pipe', 'pipe'] }, + ) + const stderr: string[] = [] + child.stderr.setEncoding('utf8') + child.stderr.on('data', (chunk: string) => stderr.push(chunk)) + + const updates: SessionNotification['update'][] = [] + const stream = ndJsonStream( + Writable.toWeb(child.stdin) as WritableStream, + Readable.toWeb(child.stdout) as ReadableStream, + ) + const makeClient = (_agent: AcpAgent): Client => ({ + sessionUpdate(params: SessionNotification): Promise { + updates.push(params.update) + return Promise.resolve() + }, + requestPermission(_params: RequestPermissionRequest): Promise { + return Promise.resolve({ outcome: { outcome: 'cancelled' } }) + }, + }) + const client = new ClientSideConnection(makeClient, stream) + return { child, client, updates, stderr } +} + +let spawned: Spawned | undefined +let workdir: string | undefined + +afterEach(async () => { + if (spawned) { + spawned.child.kill('SIGKILL') + spawned = undefined + } + if (workdir !== undefined) await rm(workdir, { recursive: true, force: true }) + workdir = undefined +}) + +describe.skipIf(!process.env.DEEPSEEK_API_KEY)('acp-agent e2e: a PreToolUse hook blocks bash (real model)', () => { + it('denies every bash command, so the requested file is never written (verified on disk)', async () => { + workdir = await mkdtemp(join(tmpdir(), 'acp-hooks-e2e-')) + // A PreToolUse hook that blocks EVERY tool (exit 2, no matcher = match-all). + // The session cwd is `workdir`, and the bridge resolves `./hooks.json` from + // the process cwd (the launch dir = workdir), so this is the config it loads. + await writeFile(join(workdir, 'hooks.json'), JSON.stringify({ + hooks: { PreToolUse: [{ hooks: [{ type: 'command', command: 'echo "bash blocked by policy" >&2; exit 2' }] }] }, + })) + + spawned = spawnAcpAgent(workdir) + const { client, updates } = spawned + + await client.initialize({ protocolVersion: PROTOCOL_VERSION, clientCapabilities: {} }) + const { sessionId } = await client.newSession({ cwd: workdir, mcpServers: [] }) + + const res = await client.prompt({ + sessionId, + prompt: [{ type: 'text', text: 'Use the bash tool to write the exact text HOOK_FAIL into a file named proof.txt in the current directory. Then stop.' }], + }) + // The turn completes normally (the block is a tool-result error fed back to + // the model, not a turn failure). + expect(['end_turn', 'max_tokens']).toContain(res.stopReason) + + // Verify the WORLD: the hook denied execution, so the file must NOT exist — + // a keyword probe a "cheating" agent could fake in prose cannot pass this. + await expect(access(join(workdir, 'proof.txt'))).rejects.toThrow() + + // The client still saw a tool_call stream (the model TRIED), and its result + // carried the hook's block reason back as an error. + const toolCalls = updates.filter(u => u.sessionUpdate === 'tool_call' || u.sessionUpdate === 'tool_call_update') + expect(toolCalls.length).toBeGreaterThan(0) + }, 180_000) +}) diff --git a/examples/acp-agent/tests/snapshot-normalize.spec.ts b/examples/acp-agent/tests/snapshot-normalize.spec.ts index b220344bb9..bfe29af8a5 100644 --- a/examples/acp-agent/tests/snapshot-normalize.spec.ts +++ b/examples/acp-agent/tests/snapshot-normalize.spec.ts @@ -90,4 +90,21 @@ describe('normalizeSessionLog', () => { const out = normalizeSessionLog(`${header({ id: ctx.sessionIds[0] })}\n`, ctx) expect(out).toContain('{{sessionId}}') }) + + it('zeroes a hook/result durationMs (run-to-run noise) but keeps its decision', () => { + const ev = JSON.stringify({ + type: 'hook/result', seq: 2, time: 5, + data: { turn: 1, point: 'UserPromptSubmit', handlerId: 'h', decision: 'block', exitCode: 2, durationMs: 37 }, + }) + const out = normalizeSessionLog(`${header({})}\n${ev}\n`, ctx) + expect(out).toContain('"durationMs":0') + expect(out).not.toContain('37') + expect(out).toContain('"decision":"block"') // the decision is the behavior — kept + }) + + it('leaves a non-hook event durationMs untouched (only hook/result is scrubbed)', () => { + const ev = JSON.stringify({ type: 'tool/result', seq: 2, time: 5, data: { durationMs: 88 } }) + const out = normalizeSessionLog(`${header({})}\n${ev}\n`, ctx) + expect(out).toContain('"durationMs":88') + }) }) diff --git a/examples/acp-agent/tests/snapshot-normalize.ts b/examples/acp-agent/tests/snapshot-normalize.ts index db0d493535..8150057fa4 100644 --- a/examples/acp-agent/tests/snapshot-normalize.ts +++ b/examples/acp-agent/tests/snapshot-normalize.ts @@ -8,7 +8,8 @@ * Scrubbed: `randomUUID()` session ids → `{{sessionId}}`; the temp `mkdtemp` * cwd → `{{cwd}}` (it appears in terminal-card `_meta` and the log header); * JSON-RPC request `id` → a stable per-transcript sequence; the log's per-event - * `time` (epoch ms) and header `createdAt` → 0. NOT scrubbed: the log's `seq` + * `time` (epoch ms) and header `createdAt` → 0; a `hook/result` event's + * `durationMs` (wall-clock hook runtime) → 0. NOT scrubbed: the log's `seq` * (deterministic — `seq = log.length`, part of the event-log contract). * * See docs/rfc/implemented/testing/2026-06-19-acp-snapshot-tests.md. @@ -97,6 +98,13 @@ export function normalizeSessionLog(rawLog: string, ctx: NormalizeContext): stri } else if ('time' in record) { // Event line: zero the epoch-ms timestamp; keep seq (deterministic). record.time = 0 + // A hook/result carries the hook's wall-clock runtime (`data.durationMs`), + // which is run-to-run noise like `time` — zero it so the golden reflects + // the hook's decision/exit, not how long the shell took. + if (record.type === 'hook/result' && record.data !== null && typeof record.data === 'object') { + const data = record.data as Record + if ('durationMs' in data) data.durationMs = 0 + } } return scrubValue(record, ctx) as Record }) diff --git a/examples/acp-agent/tests/snapshots/hook-prompt-block/input.json b/examples/acp-agent/tests/snapshots/hook-prompt-block/input.json new file mode 100644 index 0000000000..1995199566 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-prompt-block/input.json @@ -0,0 +1,7 @@ +{ + "steps": [ + { "op": "initialize" }, + { "op": "newSession" }, + { "op": "prompt", "text": "Delete everything in the repo." } + ] +} diff --git a/examples/acp-agent/tests/snapshots/hook-prompt-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-prompt-block/session.jsonl new file mode 100644 index 0000000000..74b8ba0c67 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-prompt-block/session.jsonl @@ -0,0 +1,5 @@ +{"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}"} +{"type":"turn/start","seq":0,"time":0,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}} +{"type":"hook/invoked","seq":1,"time":0,"data":{"turn":1,"point":"UserPromptSubmit","dialect":"claude","handlerId":"claude:UserPromptSubmit:1"}} +{"type":"hook/result","seq":2,"time":0,"data":{"turn":1,"point":"UserPromptSubmit","handlerId":"claude:UserPromptSubmit:1","decision":"block","exitCode":2,"stderrSummary":"blocked by policy hook","durationMs":0}} +{"type":"turn/end","seq":3,"time":0,"data":{"turn":1,"reason":{"kind":"rejected","reason":"blocked by policy hook"}}} diff --git a/examples/acp-agent/tests/snapshots/hook-prompt-block/stdout.golden.jsonl b/examples/acp-agent/tests/snapshots/hook-prompt-block/stdout.golden.jsonl new file mode 100644 index 0000000000..6f6e5b662f --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-prompt-block/stdout.golden.jsonl @@ -0,0 +1,3 @@ +{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}} +{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}"}} +{"jsonrpc":"2.0","id":3,"result":{"stopReason":"cancelled"}} diff --git a/examples/acp-agent/tests/snapshots/hook-prompt-block/workspace/hooks.json b/examples/acp-agent/tests/snapshots/hook-prompt-block/workspace/hooks.json new file mode 100644 index 0000000000..ee3da88fb1 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-prompt-block/workspace/hooks.json @@ -0,0 +1,11 @@ +{ + "hooks": { + "UserPromptSubmit": [ + { + "hooks": [ + { "type": "command", "command": "echo 'blocked by policy hook' >&2; exit 2" } + ] + } + ] + } +} diff --git a/packages/README.md b/packages/README.md index e14a1bff0e..8bdfe5cf9c 100644 --- a/packages/README.md +++ b/packages/README.md @@ -90,6 +90,8 @@ The rule: **extension** plugins depend on interfaces, never on the concrete loop | `tool-subagent/` | `subagent` | Model-facing `subagent` delegation tool over `ctx.subagents` | (registers on `ctx.tools`) | | `tool-todo/` | `todo` | Model-facing `todo_write` tool; writes the whole task list to the session log (`todo/write`) | (registers on `ctx.tools`) | | `hook-protocol/` | `hooks` | Shared Claude Code / Codex hook wire-protocol library: matcher, codec, `runHook`, merge, `hook/*` events | (none — library, no service) | +| `hooks-claude/` | `hooks` | Bridge: runs a Claude Code `hooks.json` / settings on the interception seams | (registers event listeners) | +| `hooks-codex/` | `hooks` | Bridge: runs a Codex `hooks.json` (a subset of the CC protocol) on the seams | (registers event listeners) | | `brand/` | `util` | Type-only `Branded` nominal-typing primitive (no runtime code, no harness deps) | (none — type-only) | Each package has its own `README.md` with purpose, service API, events, extension points, and deliberate non-goals (TODOs). diff --git a/packages/hooks/hooks-claude/README.md b/packages/hooks/hooks-claude/README.md new file mode 100644 index 0000000000..02cdfc9894 --- /dev/null +++ b/packages/hooks/hooks-claude/README.md @@ -0,0 +1,51 @@ +# @deepseek-ai/dsh-hooks-claude + +A cordis plugin that runs a user's existing **Claude Code** hook config (a `hooks.json`, or a settings file's `hooks` key) on the harness's canonical interception seams. It is the **CC dialect** half of the hooks subsystem: it owns CC's per-event stdin payloads, CC's env + `${CLAUDE_PLUGIN_ROOT}`/`${CLAUDE_PROJECT_DIR}` substitution, and the mapping from a hook's neutral outcome onto the harness's typed Decisions. The dialect-agnostic primitives (matcher, exit-code/stdout codec, `ctx.bash` execution, most-restrictive merge, the `hook/*` events) come from [`@deepseek-ai/dsh-hook-protocol`](../hook-protocol/README.md). + +A native cordis plugin could do everything this bridge does — more powerfully, with typed returns and no serialization boundary. **The bridge exists only to run UNMODIFIED external CC hooks faithfully**; anything bespoke should be a native plugin on the same seams (see [the interception-seams RFC](../../../docs/rfc/implemented/feature/2026-06-30-interception-seams.md)). + +## Config + +```ts +import type { Config } from '@deepseek-ai/dsh-hooks-claude' +const config: Config = { + configPath: '/path/to/hooks.json', // required: a hooks.json or a settings file with a `hooks` key + pluginRoot: '/path/to/plugin', // optional: replaces ${CLAUDE_PLUGIN_ROOT} in command strings + projectDir: '/path/to/project', // optional: replaces ${CLAUDE_PROJECT_DIR} AND set as the hook env var + defaultTimeoutMs: 600_000, // optional: per-hook timeout when a hook sets none (CC default) +} +``` + +In a `cordis.yml`: + +```yaml +- dsh-hooks-claude: + configPath: ./.claude/hooks.json + pluginRoot: ./.claude/plugins/my-plugin + projectDir: . +``` + +The config is parsed **once** at load. A read/parse failure is contained — the bridge logs a warning and registers nothing rather than crashing boot (a typo'd path must not take the agent down). Only `type: 'command'` hooks run; a `prompt`/`agent`/HTTP hook is parsed-and-skipped with a warning. + +## Hook points → seam Decisions + +| CC hook | Harness seam | Mapping | +|---|---|---| +| `SessionStart` | `agent/session-start` (emit) | additionalContext → `agent.inject()` into the new session (cannot block) | +| `UserPromptSubmit` | `agent/prompt-submit` (waterfall) | `deny` → `PromptDecision.block`; additionalContext → `allow` with context | +| `PreToolUse` | `tools/pre-execute` (waterfall) | `deny` → `PreToolDecision.deny`; `ask` → `PreToolDecision.ask` | +| `PostToolUse` | `tools/post-execute` (waterfall) | `deny` → `block` with feedback; additionalContext → `accept` with context | +| `Stop` | `agent/turn-continuation` (waterfall) | a blocking Stop hook forces `continue`, feeding its reason as next-step steering | +| `SubagentStart` | `subagent/start` (emit) | additionalContext → `agent.inject()` into the live child | +| `SubagentStop` | `subagent/end` (emit) | observe-only | + +The matcher subject is the tool name (`PreToolUse`/`PostToolUse`), the session source (`SessionStart`), or the child's agent type (`SubagentStart`/`SubagentStop`); `UserPromptSubmit`/`Stop` ignore matchers. Multiple file-configured hooks on one point run concurrently and fold most-restrictively (`deny > ask > allow`, see `dsh-hook-protocol`). + +## Context source + +Injected context carries an explicit `{ kind: 'plugin', plugin: 'hooks-claude' }` source. `agent.inject()` defaults a missing source to `{ kind: 'user' }`, which would mislabel plugin context as a user prompt — so the bridge always names itself. + +## Deferred (faithful-but-degraded) + +- **`updatedInput` (tool-input rewrite)** is logged + warned, **not honored** — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite RFC](../../../docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)). +- **Stop loop-guard.** CC breaks an infinite force-continue with `stop_hook_active` (true once a Stop hook has fired this run) plus a max-consecutive cap; both are deferred (`TODO(stop-loop-guard)`). Today `stop_hook_active` is always `false`, so a Stop hook that unconditionally blocks would force-continue every step — a hook author must self-limit until the guard lands. diff --git a/packages/hooks/hooks-claude/package.json b/packages/hooks/hooks-claude/package.json new file mode 100644 index 0000000000..5cc39f9999 --- /dev/null +++ b/packages/hooks/hooks-claude/package.json @@ -0,0 +1,49 @@ +{ + "name": "@deepseek-ai/dsh-hooks-claude", + "description": "Bridge plugin: run a Claude Code hooks.json / settings hook config on the DeepSeek Harness interception seams", + "version": "0.0.1", + "private": true, + "type": "module", + "main": "lib/index.js", + "types": "lib/types/index.d.ts", + "exports": { + ".": { + "types": "./lib/types/index.d.ts", + "default": "./lib/index.js" + }, + "./src/*": "./src/*", + "./package.json": "./package.json" + }, + "files": [ + "lib/index.js", + "lib/types/**/*.d.ts", + "lib/types/**/*.d.ts.map", + "src" + ], + "license": "BSD-3-Clause", + "dependencies": { + "schemastery": "^3.18.0" + }, + "peerDependencies": { + "@deepseek-ai/dsh-agent": "^0.0.1", + "@deepseek-ai/dsh-hook-protocol": "^0.0.1", + "@deepseek-ai/dsh-llm": "^0.0.1", + "@deepseek-ai/dsh-session": "^0.0.1", + "@deepseek-ai/dsh-subagent": "^0.0.1", + "@deepseek-ai/dsh-tools": "^0.0.1", + "cordis": "^4.0.0-rc.6" + }, + "devDependencies": { + "@deepseek-ai/dsh-agent": "workspace:^", + "@deepseek-ai/dsh-agent-loop": "workspace:^", + "@deepseek-ai/dsh-bash": "workspace:^", + "@deepseek-ai/dsh-bash-local": "workspace:^", + "@deepseek-ai/dsh-hook-protocol": "workspace:^", + "@deepseek-ai/dsh-llm": "workspace:^", + "@deepseek-ai/dsh-session": "workspace:^", + "@deepseek-ai/dsh-subagent": "workspace:^", + "@deepseek-ai/dsh-system-prompt": "workspace:^", + "@deepseek-ai/dsh-tools": "workspace:^", + "cordis": "^4.0.0-rc.6" + } +} diff --git a/packages/hooks/hooks-claude/src/config.ts b/packages/hooks/hooks-claude/src/config.ts new file mode 100644 index 0000000000..d78486e58a --- /dev/null +++ b/packages/hooks/hooks-claude/src/config.ts @@ -0,0 +1,100 @@ +/** + * Parse a Claude Code hook config file into the shared {@link MatcherGroup} + * shape, faithfully to CC's `hooks.json` / settings `hooks` key format. + * + * A CC config maps each event name to an array of matcher groups, each holding + * an array of typed hooks. Only `type: 'command'` hooks run here; other types + * (`prompt`/`agent`/`http`) are PARSED but skipped with a warning (faithful-but- + * degraded — the same stance Codex takes). The `command` string undergoes + * `${CLAUDE_PLUGIN_ROOT}` substitution at parse time so the runner sees a literal. + * + * @module @deepseek-ai/dsh-hooks-claude/config + */ + +import type { MatcherGroup } from '@deepseek-ai/dsh-hook-protocol' + +/** A parsed CC config: event name → its matcher groups (command hooks only). */ +export type ClaudeHookConfig = Record + +/** A skipped non-command hook, surfaced so the bridge can warn about it. */ +export interface SkippedHook { + event: string + type: string +} + +/** The outcome of parsing one config file: the runnable groups + what was skipped. */ +export interface ParsedClaudeConfig { + config: ClaudeHookConfig + skipped: SkippedHook[] +} + +/** Substitution variables applied to each `command` string at parse time. */ +export interface SubstitutionVars { + /** Replaces `${CLAUDE_PLUGIN_ROOT}` — the plugin's root dir. */ + pluginRoot?: string + /** Replaces `${CLAUDE_PROJECT_DIR}` — the project root. */ + projectDir?: string +} + +/** A plain (non-null, non-array) object, else undefined. */ +function asObject(value: unknown): Record | undefined { + return typeof value === 'object' && value !== null && !Array.isArray(value) + ? value as Record + : undefined +} + +/** Apply `${CLAUDE_PLUGIN_ROOT}` / `${CLAUDE_PROJECT_DIR}` substitution to a command string. */ +export function substituteCommand(command: string, vars: SubstitutionVars): string { + let out = command + if (vars.pluginRoot !== undefined) out = out.split('${CLAUDE_PLUGIN_ROOT}').join(vars.pluginRoot) + if (vars.projectDir !== undefined) out = out.split('${CLAUDE_PROJECT_DIR}').join(vars.projectDir) + return out +} + +/** + * Parse a raw Claude Code config object (the value under the `hooks` key, or a + * `hooks.json` whose top level IS that map) into runnable {@link MatcherGroup}s. + * Non-command hooks and malformed entries are dropped (recorded in `skipped` / + * silently ignored) rather than throwing — a bad hook config must not crash boot. + * `vars` are substituted into every surviving `command`. + */ +export function parseClaudeConfig(raw: unknown, vars: SubstitutionVars = {}): ParsedClaudeConfig { + const config: ClaudeHookConfig = {} + const skipped: SkippedHook[] = [] + // Accept either `{ hooks: { … } }` (a settings file) or the bare event map. + const root = asObject(raw) + const hooksMap = root ? asObject(root.hooks) ?? root : undefined + if (!hooksMap) return { config, skipped } + + for (const [event, rawGroups] of Object.entries(hooksMap)) { + if (!Array.isArray(rawGroups)) continue + const groups: MatcherGroup[] = [] + for (const rawGroup of rawGroups) { + const group = asObject(rawGroup) + if (!group || !Array.isArray(group.hooks)) continue + const commands: MatcherGroup['hooks'] = [] + for (const rawHook of group.hooks) { + const hook = asObject(rawHook) + if (!hook) continue + const type = typeof hook.type === 'string' ? hook.type : 'command' + if (type !== 'command') { + skipped.push({ event, type }) + continue + } + if (typeof hook.command !== 'string') continue + commands.push({ + command: substituteCommand(hook.command, vars), + ...typeof hook.timeout === 'number' ? { timeoutSec: hook.timeout } : {}, + }) + } + if (commands.length === 0) continue + groups.push({ + ...typeof group.matcher === 'string' ? { matcher: group.matcher } : {}, + hooks: commands, + }) + } + if (groups.length > 0) config[event] = groups + } + + return { config, skipped } +} diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts new file mode 100644 index 0000000000..5e8478e2b7 --- /dev/null +++ b/packages/hooks/hooks-claude/src/index.ts @@ -0,0 +1,300 @@ +/** + * `dsh-hooks-claude` — a bridge plugin that runs a user's existing Claude Code + * hook config (`hooks.json` / a settings file's `hooks` key) on the harness's + * canonical interception seams. It is the CC DIALECT half of the hooks + * subsystem: it owns CC's per-event stdin payloads, CC's env + + * `${CLAUDE_PLUGIN_ROOT}` substitution, and the mapping from a hook's neutral + * outcome onto the harness's typed Decisions. The dialect-agnostic primitives + * (matcher, exit-code/stdout codec, `ctx.bash` execution, most-restrictive + * merge, the `hook/*` events) come from `@deepseek-ai/dsh-hook-protocol`. + * + * A native cordis plugin could do everything this bridge does — more powerfully, + * with typed returns and no serialization boundary. The bridge exists only to + * run UNMODIFIED external CC hooks faithfully; anything bespoke should be a + * native plugin on the same seams. + * + * Scope: the seven in-scope hook points (`SessionStart`, `UserPromptSubmit`, + * `PreToolUse`, `PostToolUse`, `Stop`, `SubagentStart`, `SubagentStop`). Only + * `type: 'command'` hooks run; the matcher group config + exit-code/stdout + * protocol are byte-faithful to CC. `updatedInput` (tool-input rewrite) is + * logged + warned, not honored (deferred — see the interception-seams RFC). + * + * @module @deepseek-ai/dsh-hooks-claude + */ + +import { readFileSync } from 'node:fs' +import type { Context } from 'cordis' +import z from 'schemastery' +import type { Agent, ContinuationDecision, HookContext, PromptDecision } from '@deepseek-ai/dsh-agent' +import type { ContentBlock, MessageSource } from '@deepseek-ai/dsh-llm' +import type { PostToolDecision, PreToolDecision, ToolExecution, ToolExecutionResult } from '@deepseek-ai/dsh-tools' +import { + appendHookInvoked, + appendHookResult, + matchesMatcher, + mergeHookOutputs, + runHook, + type HookOutput, + type MatcherGroup, + type MergedHookOutcome, +} from '@deepseek-ai/dsh-hook-protocol' +// Side-effect type import: pulls in the `subagent/start` + `subagent/end` event +// declarations (declaration-merged into cordis `Events` by dsh-subagent) so the +// SubagentStart/SubagentStop listeners below type-check. +import type {} from '@deepseek-ai/dsh-subagent' +import { parseClaudeConfig, type ClaudeHookConfig } from './config.ts' + +export const name = 'hooks-claude' +// `bash` is required to run hooks; the rest are read opportunistically via +// ctx.get so a deployment can load this bridge without every seam present. +export const inject = ['bash'] + +/** Plugin config: where the CC hook config lives + substitution roots. */ +export interface Config { + /** Path to a `hooks.json` or a settings file whose `hooks` key holds the config. */ + configPath: string + /** Replaces `${CLAUDE_PLUGIN_ROOT}` in command strings (the plugin's root dir). */ + pluginRoot?: string + /** Replaces `${CLAUDE_PROJECT_DIR}` in command strings + set as the hook env var. */ + projectDir?: string + /** Default per-hook timeout in ms when a hook sets none (CC default: 600000). */ + defaultTimeoutMs?: number +} + +export const Config: z = z.object({ + configPath: z.string().required(), + pluginRoot: z.string(), + projectDir: z.string(), + defaultTimeoutMs: z.number().default(600_000), +}) + +/** A stable per-handler id so an invoked/result pair correlates in the log. */ +let handlerCounter = 0 +function nextHandlerId(point: string): string { + return `claude:${point}:${++handlerCounter}` +} + +/** The `{kind:'plugin'}` source stamped on every context this bridge injects. */ +const PLUGIN_SOURCE: MessageSource = { kind: 'plugin', plugin: 'hooks-claude' } + +/** Truncate a stderr blob for the `hook/result` summary field. */ +function summarize(stderr: string): string | undefined { + const t = stderr.trim() + if (t.length === 0) return undefined + return t.length > 500 ? t.slice(0, 500) + '…' : t +} + +export function apply(ctx: Context, config: Config): void { + // --- Parse the config ONCE at load. A read/parse failure is contained: the + // bridge logs and registers nothing rather than crashing boot (a typo'd path + // must not take the agent down). --- + let parsed: ClaudeHookConfig = {} + try { + const raw: unknown = JSON.parse(readFileSync(config.configPath, 'utf8')) + const result = parseClaudeConfig(raw, { + ...config.pluginRoot !== undefined ? { pluginRoot: config.pluginRoot } : {}, + ...config.projectDir !== undefined ? { projectDir: config.projectDir } : {}, + }) + parsed = result.config + for (const s of result.skipped) { + ctx.logger.warn(`hooks-claude: skipping unsupported "${s.type}" hook on ${s.event} (only command hooks run)`) + } + } catch (error: unknown) { + ctx.logger.warn(`hooks-claude: could not load hook config "${config.configPath}": ${String(error)} — no hooks registered`) + return + } + + const defaultTimeoutMs = config.defaultTimeoutMs ?? 600_000 + const hookEnv = config.projectDir !== undefined ? { CLAUDE_PROJECT_DIR: config.projectDir } : undefined + + /** + * Run every command hook configured for `point` whose matcher selects + * `matchQuery`, with the per-event `payload` on stdin, and fold the results. + * Writes a `hook/invoked`/`hook/result` pair per hook into the session when one + * is available (the mid-turn points always have an open turn). Returns the + * merged outcome (a neutral, already-most-restrictive view) for the caller to + * map onto its seam decision. `matchQuery` is the event's matcher subject + * (tool name, session source, …); `''` for events that ignore matchers. + */ + async function runPoint( + point: string, + matchQuery: string, + payload: unknown, + opts: { agent?: Agent; turn?: number; signal?: AbortSignal }, + ): Promise { + const groups: MatcherGroup[] = parsed[point] ?? [] + const outputs: HookOutput[] = [] + for (const group of groups) { + if (!matchesMatcher(group.matcher, matchQuery, 'claude')) continue + for (const hook of group.hooks) { + const handlerId = nextHandlerId(point) + const session = opts.agent?.session + if (session && opts.turn !== undefined) { + appendHookInvoked(session, { + turn: opts.turn, point, dialect: 'claude', handlerId, + ...group.matcher !== undefined ? { matcher: group.matcher } : {}, + }) + } + const { output, durationMs } = await runHook(ctx.bash, hook, { + payload, + ...hookEnv ? { env: hookEnv } : {}, + ...opts.signal ? { signal: opts.signal } : {}, + defaultTimeoutMs, + trailingNewline: true, + }, () => performance.now()) + outputs.push(output) + if (output.updatedInput !== undefined) { + ctx.logger.warn(`hooks-claude: ${point} hook requested updatedInput, which is not yet honored (ignored)`) + } + if (session && opts.turn !== undefined) { + const stderrSummary = summarize(output.stderr) + appendHookResult(session, { + turn: opts.turn, point, handlerId, + decision: output.decision ?? (output.continue === false ? 'stop' : 'pass'), + ...output.exitCode !== undefined ? { exitCode: output.exitCode } : {}, + ...stderrSummary !== undefined ? { stderrSummary } : {}, + durationMs, + }) + } + } + } + return mergeHookOutputs(outputs) + } + + /** Build a HookContext from accumulated additionalContext strings, or undefined when none. */ + function contextFrom(merged: MergedHookOutcome): HookContext | undefined { + if (merged.additionalContext.length === 0) return undefined + const content: ContentBlock[] = merged.additionalContext.map(text => ({ type: 'text', text })) + return { content, source: PLUGIN_SOURCE } + } + + // --- SessionStart: emit (cannot block). Inject any additionalContext into the + // agent so the first request sees it. The matcher subject is the source. --- + ctx.on('agent/session-start', (agent, source) => { + void runPoint('SessionStart', source, sessionStartPayload(agent, source), { agent }) + .then((merged) => { + const context = contextFrom(merged) + if (context) agent.inject(context.content, { source: context.source }) + }) + .catch((error: unknown) => { + ctx.logger.warn(`hooks-claude: SessionStart hook failed: ${String(error)}`) + }) + }) + + // --- UserPromptSubmit → PromptDecision. The prompt text is the payload; no + // matcher subject (CC ignores matchers for this event). --- + ctx.on('agent/prompt-submit', async (agent, content, _source, next): Promise => { + const turn = lastTurn(agent) + const merged = await runPoint('UserPromptSubmit', '', promptPayload(agent, content), { agent, turn }) + if (merged.decision === 'deny') { + return { kind: 'block', reason: merged.reason ?? 'blocked by UserPromptSubmit hook' } + } + const context = contextFrom(merged) + if (context) return { kind: 'allow', additionalContext: context } + return next() + }) + + // --- PreToolUse → PreToolDecision. Matcher subject is the tool name. --- + ctx.on('tools/pre-execute', async (exec, next): Promise => { + const turn = lastTurn(exec.agent) + const merged = await runPoint('PreToolUse', exec.name, preToolPayload(exec), { ...exec.agent ? { agent: exec.agent } : {}, turn, ...exec.signal ? { signal: exec.signal } : {} }) + if (merged.decision === 'deny') return { kind: 'deny', reason: merged.reason ?? 'blocked by PreToolUse hook' } + if (merged.decision === 'ask') return { kind: 'ask', ...merged.reason !== undefined ? { reason: merged.reason } : {} } + return next() + }) + + // --- PostToolUse → PostToolDecision. Matcher subject is the tool name. --- + ctx.on('tools/post-execute', async (exec, result, next): Promise => { + const turn = lastTurn(exec.agent) + const merged = await runPoint('PostToolUse', exec.name, postToolPayload(exec, result), { ...exec.agent ? { agent: exec.agent } : {}, turn, ...exec.signal ? { signal: exec.signal } : {} }) + const context = contextFrom(merged) + if (merged.decision === 'deny') { + return { kind: 'block', feedback: [{ type: 'text', text: merged.reason ?? 'blocked by PostToolUse hook' }], ...context ? { additionalContext: context } : {} } + } + if (context) return { kind: 'accept', additionalContext: context } + return next() + }) + + // --- Stop → ContinuationDecision. CC's Stop hook can force the conversation to + // CONTINUE (block the stop) with stderr/reason as the continuation. No matcher. + // TODO(stop-loop-guard): CC breaks an infinite force-continue with + // `stop_hook_active` (set true once a Stop hook has already fired this run) plus + // a max-consecutive cap; both are deferred. Today `stop_hook_active` is always + // false, so a Stop hook that unconditionally blocks would force-continue every + // step — a hook author must self-limit until the guard lands. --- + ctx.on('agent/turn-continuation', async (agent, turn, _default, next): Promise => { + const merged = await runPoint('Stop', '', stopPayload(agent), { agent, turn }) + if (merged.decision === 'deny' && merged.reason !== undefined) { + // A blocking Stop hook forces continuation, feeding its reason as next-step steering. + return { action: 'continue', reason: { content: [{ type: 'text', text: merged.reason }], source: PLUGIN_SOURCE } } + } + return next() + }) + + // --- SubagentStart / SubagentStop: observe-only emits (the subagent seam is + // observe-only this cut). A SubagentStart hook's additionalContext is injected + // into the live child; SubagentStop only observes. No matcher subject. --- + ctx.on('subagent/start', (info) => { + const child = ctx.get('agents')?.get(info.id) + void runPoint('SubagentStart', info.agentType ?? '', subagentStartPayload(info), { ...child ? { agent: child } : {} }) + .then((merged) => { + const context = contextFrom(merged) + if (context && child) child.inject(context.content, { source: context.source }) + }) + .catch((error: unknown) => { ctx.logger.warn(`hooks-claude: SubagentStart hook failed: ${String(error)}`) }) + }) + ctx.on('subagent/end', (info) => { + // No `.then`/inject here (SubagentStop only observes) and no session is + // passed, so runPoint cannot reject — no `.catch` is needed (one would be + // dead code). The observe-only run is fire-and-forget. + void runPoint('SubagentStop', info.agentType ?? '', subagentStopPayload(info), {}) + }) +} + +// --- Per-event stdin payloads (the CC DIALECT shape). Field names match CC's +// hook input schema; this is the part a bridge owns. --- + +/** The last (open or just-closed) turn number in the agent's log, or 0. */ +function lastTurn(agent: Agent | undefined): number { + if (!agent) return 0 + const last = [...agent.session.events].findLast(e => e.type === 'turn/start') + /* v8 ignore next -- the `: 0` arm is a defensive fallback: lastTurn is only + called from the mid-turn seams (prompt-submit/pre-/post-execute/continuation), + which always run inside an open turn, so `last` is always a turn/start here. */ + return last?.type === 'turn/start' ? last.data.turn : 0 +} + +/** Flatten content blocks to the text a hook payload carries (the common case). */ +function blocksToText(content: ContentBlock[]): string { + return content.filter((b): b is Extract => b.type === 'text').map(b => b.text).join('') +} + +function base(agent: Agent | undefined, event: string): Record { + return { + session_id: agent?.session.header.id ?? '', + cwd: agent?.session.header.cwd ?? process.cwd(), + hook_event_name: event, + } +} + +function sessionStartPayload(agent: Agent, source: string): Record { + return { ...base(agent, 'SessionStart'), source } +} +function promptPayload(agent: Agent, content: ContentBlock[]): Record { + return { ...base(agent, 'UserPromptSubmit'), prompt: blocksToText(content) } +} +function preToolPayload(exec: ToolExecution): Record { + return { ...base(exec.agent, 'PreToolUse'), tool_name: exec.name, tool_input: exec.arguments, tool_use_id: exec.callId } +} +function postToolPayload(exec: ToolExecution, result: ToolExecutionResult): Record { + return { ...base(exec.agent, 'PostToolUse'), tool_name: exec.name, tool_input: exec.arguments, tool_use_id: exec.callId, tool_response: blocksToText(result.content) } +} +function stopPayload(agent: Agent): Record { + return { ...base(agent, 'Stop'), stop_hook_active: false } +} +function subagentStartPayload(info: { id: string; agentType?: string }): Record { + return { hook_event_name: 'SubagentStart', agent_id: info.id, ...info.agentType !== undefined ? { agent_type: info.agentType } : {} } +} +function subagentStopPayload(info: { id: string; agentType?: string }): Record { + return { hook_event_name: 'SubagentStop', agent_id: info.id, stop_hook_active: false, ...info.agentType !== undefined ? { agent_type: info.agentType } : {} } +} diff --git a/packages/hooks/hooks-claude/tests/bridge.spec.ts b/packages/hooks/hooks-claude/tests/bridge.spec.ts new file mode 100644 index 0000000000..73cd66df10 --- /dev/null +++ b/packages/hooks/hooks-claude/tests/bridge.spec.ts @@ -0,0 +1,335 @@ +import { afterEach, describe, expect, it } from 'vitest' +import { mkdtempSync, rmSync, writeFileSync, chmodSync } from 'node:fs' +import { tmpdir } from 'node:os' +import { join } from 'node:path' +import { Context } from 'cordis' +import Loader from '@cordisjs/plugin-loader' +import LlmService from '@deepseek-ai/dsh-llm' +import SessionStore, { type SessionEvent } from '@deepseek-ai/dsh-session' +import SystemPrompt from '@deepseek-ai/dsh-system-prompt' +import ToolRegistry, { defineTool } from '@deepseek-ai/dsh-tools' +import AgentRegistry, { AgentId } from '@deepseek-ai/dsh-agent' +import AgentLoop, { type ReactLoopAgent } from '@deepseek-ai/dsh-agent-loop' +import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local' +import * as HooksClaude from '@deepseek-ai/dsh-hooks-claude' +import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts' + +/** + * Full-loop bridge tests: a scripted mock MODEL drives the REAL agent loop + REAL + * bash executor, and the REAL `dsh-hooks-claude` bridge runs REAL shell hook + * scripts written to a temp dir — only the model is mocked (the "prefer the real + * implementation" rule). Each test writes a `hooks.json` + executable scripts, + * loads the bridge pointed at them, and asserts the hook's effect on the loop. + */ + +const dirs: string[] = [] +afterEach(() => { for (const d of dirs.splice(0)) rmSync(d, { recursive: true, force: true }) }) + +/** Write a hooks.json + named executable scripts into a fresh temp dir. */ +function writeConfig(hooks: unknown, scripts: Record = {}): string { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks })) + for (const [name, body] of Object.entries(scripts)) { + const path = join(dir, name) + writeFileSync(path, body) + chmodSync(path, 0o755) + } + return dir +} + +async function harness(configDir: string, adapter: MockAdapter): Promise { + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) + await ctx.plugin(HooksClaude, { configPath: join(configDir, 'hooks.json') }) + ctx.llm.registerAdapter(['mock'], adapter) + return ctx +} + +function waitForIdle(ctx: Context, agent: ReactLoopAgent): Promise { + return new Promise((resolve) => { + const dispose = ctx.on('agent/status', (subject, status) => { + if (subject === agent && status === 'idle') { dispose(); resolve() } + }) + }) +} + +function events(agent: ReactLoopAgent): SessionEvent[] { + return [...agent.session.events] +} + +describe('hooks-claude bridge — UserPromptSubmit', () => { + it('a UserPromptSubmit hook that exits 2 blocks the prompt (rejected turn)', async () => { + // The UserPromptSubmit hook exits 2 (blocking) with a reason on stderr. + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + const block = join(dir, 'block.sh') + writeFileSync(block, '#!/usr/bin/env bash\necho "prompt denied by policy" >&2\nexit 2\n') + chmodSync(block, 0o755) + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { UserPromptSubmit: [{ hooks: [{ type: 'command', command: block }] }] } })) + + const adapter = new MockAdapter([textResponse('should not run')]) + const ctx = await harness(dir, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'do something' }]) + await waitForIdle(ctx, agent) + + // The prompt was blocked: model never called, turn ended rejected. + expect(adapter.requests).toHaveLength(0) + const turnEnd = events(agent).findLast(e => e.type === 'turn/end') + expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason.kind).toBe('rejected') + // The hook ran and was recorded. + expect(events(agent).some(e => e.type === 'hook/invoked' && e.data.point === 'UserPromptSubmit')).toBe(true) + expect(events(agent).some(e => e.type === 'hook/result' && e.data.decision === 'block')).toBe(true) + }) + + it('a UserPromptSubmit hook printing additionalContext injects it for the model', async () => { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + const ctxScript = join(dir, 'ctx.sh') + writeFileSync(ctxScript, '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"remember: be brief"}}\'\n') + chmodSync(ctxScript, 0o755) + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { UserPromptSubmit: [{ hooks: [{ type: 'command', command: ctxScript }] }] } })) + + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(dir, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + + // The injected context reached the model and is recorded with the plugin source. + expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('remember: be brief') + const ctxMsg = events(agent).find(e => e.type === 'context/message') + expect(ctxMsg?.type === 'context/message' && ctxMsg.data.source).toEqual({ kind: 'plugin', plugin: 'hooks-claude' }) + }) +}) + +describe('hooks-claude bridge — PreToolUse', () => { + it('a matching PreToolUse hook that exits 2 denies the tool (isError result), tool never runs', async () => { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + const deny = join(dir, 'deny.sh') + writeFileSync(deny, '#!/usr/bin/env bash\necho "danger tool blocked" >&2\nexit 2\n') + chmodSync(deny, 0o755) + // Matcher "danger" (literal) selects only the danger tool. + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { PreToolUse: [{ matcher: 'danger', hooks: [{ type: 'command', command: deny }] }] } })) + + const adapter = new MockAdapter([toolCallResponse('c1', 'danger', {}), textResponse('done')]) + const ctx = await harness(dir, adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'danger', description: 'd', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'should not run' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'use danger' }]) + await waitForIdle(ctx, agent) + + expect(ran).toBe(false) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('danger tool blocked'))).toBe(true) + }) + + it('a PreToolUse hook whose matcher does NOT match leaves the tool alone', async () => { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + const deny = join(dir, 'deny.sh') + writeFileSync(deny, '#!/usr/bin/env bash\nexit 2\n') + chmodSync(deny, 0o755) + // Matcher only targets "danger" — the "safe" tool is untouched. + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { PreToolUse: [{ matcher: 'danger', hooks: [{ type: 'command', command: deny }] }] } })) + + const adapter = new MockAdapter([toolCallResponse('c1', 'safe', {}), textResponse('done')]) + const ctx = await harness(dir, adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'safe', description: 's', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'ran ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'use safe' }]) + await waitForIdle(ctx, agent) + + expect(ran).toBe(true) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(false) + }) +}) + +describe('hooks-claude bridge — PostToolUse', () => { + it('a PostToolUse hook that blocks (exit 2) turns the result into an isError with feedback', async () => { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + const block = join(dir, 'block.sh') + writeFileSync(block, '#!/usr/bin/env bash\necho "output rejected, retry" >&2\nexit 2\n') + chmodSync(block, 0o755) + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { PostToolUse: [{ hooks: [{ type: 'command', command: block }] }] } })) + + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(dir, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'raw output' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + + const result = events(agent).find(e => e.type === 'tool/result') + // PostToolUse blocks AFTER the tool ran: the result is rewritten to isError + feedback. + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('output rejected, retry'))).toBe(true) + }) + + it('a PostToolUse hook printing additionalContext attaches it after the tool result', async () => { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + const s = join(dir, 'ctx.sh') + writeFileSync(s, '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"note: tool was slow"}}\'\n') + chmodSync(s, 0o755) + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { PostToolUse: [{ hooks: [{ type: 'command', command: s }] }] } })) + + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(dir, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + + const log = events(agent) + const resultIdx = log.findIndex(e => e.type === 'tool/result') + const ctxIdx = log.findIndex(e => e.type === 'context/message') + expect(ctxIdx).toBeGreaterThan(resultIdx) // context appended AFTER the tool result + const ctxMsg = log[ctxIdx] + expect(ctxMsg?.type === 'context/message' && ctxMsg.data.content.some(b => b.type === 'text' && b.text.includes('tool was slow'))).toBe(true) + }) + + it('a PreToolUse permissionDecision:ask degrades to ask (the tool is gated, not run)', async () => { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + const s = join(dir, 'ask.sh') + writeFileSync(s, '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PreToolUse","permissionDecision":"ask","permissionDecisionReason":"needs approval"}}\'\n') + chmodSync(s, 0o755) + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] } })) + + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(dir, adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'x' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + + // `ask` degrades to deny today (FIXME permissions): the tool does not run and the result is isError. + expect(ran).toBe(false) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('needs approval'))).toBe(true) + }) +}) + +describe('hooks-claude bridge — SessionStart', () => { + it('a SessionStart hook injects additionalContext the first request sees', async () => { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + const s = join(dir, 'start.sh') + writeFileSync(s, '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SessionStart","additionalContext":"project uses tabs"}}\'\n') + chmodSync(s, 0o755) + // matcher 'startup' selects the startup source. + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { SessionStart: [{ matcher: 'startup', hooks: [{ type: 'command', command: s }] }] } })) + + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(dir, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + // session-start fires async; wait a tick for the inject before sending. + await new Promise(r => setTimeout(r, 50)) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + + expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('project uses tabs') + }) +}) + +describe('hooks-claude bridge — SubagentStart / SubagentStop (observe)', () => { + it('runs SubagentStart and SubagentStop hooks when the subagent lifecycle events fire', async () => { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-')) + dirs.push(dir) + // Each hook touches a marker file so we can assert it ran (these events are + // observe-only — there is no decision to assert, only the side effect). + const startMarker = join(dir, 'start-ran') + const stopMarker = join(dir, 'stop-ran') + const startHook = join(dir, 'start.sh') + const stopHook = join(dir, 'stop.sh') + writeFileSync(startHook, `#!/usr/bin/env bash\ntouch "${startMarker}"\n`) + writeFileSync(stopHook, `#!/usr/bin/env bash\ntouch "${stopMarker}"\n`) + chmodSync(startHook, 0o755) + chmodSync(stopHook, 0o755) + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks: { + SubagentStart: [{ hooks: [{ type: 'command', command: startHook }] }], + SubagentStop: [{ hooks: [{ type: 'command', command: stopHook }] }], + } })) + + const adapter = new MockAdapter([]) + const ctx = await harness(dir, adapter) + // Drive the observe-only lifecycle events directly (no real child needed — the + // bridge just listens). The agents registry is absent here, so SubagentStart's + // child lookup yields undefined and it simply runs the hook. + ctx.emit('subagent/start', { provider: 'inproc', id: AgentId('child-1'), agentType: 'researcher' }) + ctx.emit('subagent/end', { provider: 'inproc', id: AgentId('child-1'), agentType: 'researcher', stopReason: 'completed', lastAssistantMessage: [{ type: 'text', text: 'done' }] }) + // Both hooks run async (detached .then); let them settle. + await new Promise(r => setTimeout(r, 80)) + + const { existsSync } = await import('node:fs') + expect(existsSync(startMarker)).toBe(true) + expect(existsSync(stopMarker)).toBe(true) + }) +}) + +describe('hooks-claude bridge — load resilience', () => { + it('a missing config file registers no hooks and does not crash the loop', async () => { + const adapter = new MockAdapter([textResponse('fine')]) + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) + await ctx.plugin(HooksClaude, { configPath: '/nonexistent/hooks.json' }) + ctx.llm.registerAdapter(['mock'], adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + // The turn ran normally — no hooks, no crash. + expect(adapter.requests).toHaveLength(1) + }) + + it('disposing the bridge fiber removes its listeners (HMR safety)', async () => { + const dir = writeConfig({ UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'true' }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(dir, adapter) + const fiber = await ctx.plugin(HooksClaude, { configPath: join(dir, 'hooks.json') }) + await fiber.dispose() + // After disposing this second mount, the FIRST mount's listeners still work, + // but the disposed one contributed none — assert no leaked listener throws. + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(adapter.requests.length).toBeGreaterThanOrEqual(1) + }) + + it('has the namespace-plugin export shape (no stray default) so the Loader keeps name/inject/apply', () => { + // Postmortem 0001 guard: this plugin HAS `inject = ['bash']`, so a stray + // `export default apply` would collapse the module via `unwrapExports` + // (`exports.default ?? exports`), DROP `inject`, and crash at load with + // "cannot get property … without inject". Guard the shape directly. + expect('default' in HooksClaude).toBe(false) + expect(HooksClaude.name).toBe('hooks-claude') + expect(HooksClaude.inject).toEqual(['bash']) + const loader = Object.create(Loader.prototype) as Loader + const unwrapped = loader.unwrapExports(HooksClaude) as Record + expect(unwrapped).toBe(HooksClaude) + expect(unwrapped.name).toBe('hooks-claude') + expect(unwrapped.inject).toEqual(['bash']) + expect(typeof unwrapped.apply).toBe('function') + }) +}) diff --git a/packages/hooks/hooks-claude/tests/config.spec.ts b/packages/hooks/hooks-claude/tests/config.spec.ts new file mode 100644 index 0000000000..f635ef0fd9 --- /dev/null +++ b/packages/hooks/hooks-claude/tests/config.spec.ts @@ -0,0 +1,66 @@ +import { describe, expect, it } from 'vitest' +import { parseClaudeConfig, substituteCommand } from '@deepseek-ai/dsh-hooks-claude/src/config.ts' + +describe('substituteCommand', () => { + it('replaces CLAUDE_PLUGIN_ROOT and CLAUDE_PROJECT_DIR (all occurrences)', () => { + expect(substituteCommand('${CLAUDE_PLUGIN_ROOT}/x.sh', { pluginRoot: '/p' })).toBe('/p/x.sh') + expect(substituteCommand('${CLAUDE_PROJECT_DIR}/a ${CLAUDE_PROJECT_DIR}/b', { projectDir: '/proj' })).toBe('/proj/a /proj/b') + expect(substituteCommand('${CLAUDE_PLUGIN_ROOT}-${CLAUDE_PROJECT_DIR}', { pluginRoot: '/p', projectDir: '/d' })).toBe('/p-/d') + }) + it('leaves the command untouched when no vars are supplied', () => { + expect(substituteCommand('${CLAUDE_PLUGIN_ROOT}/x', {})).toBe('${CLAUDE_PLUGIN_ROOT}/x') + }) +}) + +describe('parseClaudeConfig', () => { + it('parses a bare event map and a settings-style { hooks: … } wrapper identically', () => { + const groups = { PreToolUse: [{ matcher: 'Bash', hooks: [{ type: 'command', command: 'x.sh' }] }] } + const bare = parseClaudeConfig(groups) + const wrapped = parseClaudeConfig({ hooks: groups }) + expect(bare.config).toEqual(wrapped.config) + expect(bare.config.PreToolUse).toEqual([{ matcher: 'Bash', hooks: [{ command: 'x.sh' }] }]) + }) + + it('carries timeout → timeoutSec and substitutes the command', () => { + const { config } = parseClaudeConfig( + { Stop: [{ hooks: [{ type: 'command', command: '${CLAUDE_PLUGIN_ROOT}/s.sh', timeout: 30 }] }] }, + { pluginRoot: '/p' }, + ) + expect(config.Stop).toEqual([{ hooks: [{ command: '/p/s.sh', timeoutSec: 30 }] }]) + }) + + it('skips non-command hooks (recorded) and keeps the command ones in the same group', () => { + const { config, skipped } = parseClaudeConfig({ + PreToolUse: [{ hooks: [ + { type: 'prompt', prompt: 'hi' }, + { type: 'command', command: 'ok.sh' }, + { type: 'http', url: 'http://x' }, + ] }], + }) + expect(config.PreToolUse).toEqual([{ hooks: [{ command: 'ok.sh' }] }]) + expect(skipped).toEqual([{ event: 'PreToolUse', type: 'prompt' }, { event: 'PreToolUse', type: 'http' }]) + }) + + it('treats a hook with no `type` as a command (CC default)', () => { + const { config } = parseClaudeConfig({ Stop: [{ hooks: [{ command: 'd.sh' }] }] }) + expect(config.Stop).toEqual([{ hooks: [{ command: 'd.sh' }] }]) + }) + + it('drops malformed entries without throwing: non-array groups, non-object group/hook, missing command, empty groups', () => { + expect(parseClaudeConfig({ PreToolUse: 'nope' }).config).toEqual({}) + expect(parseClaudeConfig({ PreToolUse: [42, { hooks: 'no' }, { hooks: [7, { type: 'command' }] }] }).config).toEqual({}) + // a group whose only hook lacks a command string drops the whole (empty) group + expect(parseClaudeConfig({ Stop: [{ hooks: [{ type: 'command', command: 5 }] }] }).config).toEqual({}) + }) + + it('returns empty for a non-object / null / array top level', () => { + expect(parseClaudeConfig(null).config).toEqual({}) + expect(parseClaudeConfig(42).config).toEqual({}) + expect(parseClaudeConfig([1, 2]).config).toEqual({}) + }) + + it('omits the matcher key when the group has none (match-all)', () => { + const { config } = parseClaudeConfig({ Stop: [{ hooks: [{ type: 'command', command: 's.sh' }] }] }) + expect('matcher' in config.Stop![0]!).toBe(false) + }) +}) diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts new file mode 100644 index 0000000000..29dda6b850 --- /dev/null +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -0,0 +1,405 @@ +import { afterEach, describe, expect, it, vi } from 'vitest' +import { mkdtempSync, rmSync, writeFileSync, chmodSync, existsSync } from 'node:fs' +import { tmpdir } from 'node:os' +import { join } from 'node:path' +import { Context } from 'cordis' +import LlmService from '@deepseek-ai/dsh-llm' +import SessionStore, { type SessionEvent } from '@deepseek-ai/dsh-session' +import SystemPrompt from '@deepseek-ai/dsh-system-prompt' +import ToolRegistry, { defineTool } from '@deepseek-ai/dsh-tools' +import AgentRegistry, { AgentId } from '@deepseek-ai/dsh-agent' +import AgentLoop, { type ReactLoopAgent } from '@deepseek-ai/dsh-agent-loop' +import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local' +import * as HooksClaude from '@deepseek-ai/dsh-hooks-claude' +import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts' + +/** Targeted branch coverage for the CC bridge: option arms, warn paths, no-agent + * fallbacks, contextFrom-empty, and the detached-listener catch handlers. */ + +const dirs: string[] = [] +afterEach(() => { for (const d of dirs.splice(0)) rmSync(d, { recursive: true, force: true }) }) + +function dir(): string { const d = mkdtempSync(join(tmpdir(), 'dsh-hc-cov-')); dirs.push(d); return d } +function sh(d: string, name: string, body: string): string { + const p = join(d, name); writeFileSync(p, body); chmodSync(p, 0o755); return p +} +function hooks(d: string, h: unknown): string { + writeFileSync(join(d, 'hooks.json'), JSON.stringify({ hooks: h })); return join(d, 'hooks.json') +} + +type HarnessOpts = { pluginRoot?: string; projectDir?: string } +async function harness(configPath: string, adapter: MockAdapter, opts: HarnessOpts = {}): Promise { + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) + await ctx.plugin(HooksClaude, { configPath, ...opts }) + ctx.llm.registerAdapter(['mock'], adapter) + return ctx +} +function waitForIdle(ctx: Context, agent: ReactLoopAgent): Promise { + return new Promise((resolve) => { const d = ctx.on('agent/status', (s, st) => { if (s === agent && st === 'idle') { d(); resolve() } }) }) +} +function events(agent: ReactLoopAgent): SessionEvent[] { return [...agent.session.events] } + +describe('hooks-claude coverage — config option arms + substitution + skip warning', () => { + it('honors pluginRoot + projectDir substitution and warns on a skipped non-command hook', async () => { + const d = dir() + // ${CLAUDE_PLUGIN_ROOT} resolves to d; the script writes its own cwd-independent marker. + const marker = join(d, 'ran') + sh(d, 'h.sh', `#!/usr/bin/env bash\ntouch "${marker}"\n`) + const path = hooks(d, { + PreToolUse: [{ hooks: [ + { type: 'prompt', prompt: 'skipme' }, // skipped → warn loop + { type: 'command', command: '${CLAUDE_PLUGIN_ROOT}/h.sh' }, // substituted + ] }], + }) + const warn = vi.fn() + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter, { pluginRoot: d, projectDir: d }) + ctx.logger.warn = warn as never + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(existsSync(marker)).toBe(true) // substituted command ran + }) + + it('warns and honors updatedInput as a no-op (input rewrite deferred)', async () => { + const d = dir() + const s = sh(d, 'u.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PreToolUse","permissionDecision":"allow","updatedInput":{"command":"rewritten"}}}\'\n') + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const warn = vi.fn() + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', { command: 'original' }), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.logger.warn = warn as never + let sawArgs: unknown + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: { command: { type: 'string' } }, async execute(args) { sawArgs = args; return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + // updatedInput is NOT honored — the tool ran with the ORIGINAL args. + expect((sawArgs as { command?: string }).command).toBe('original') + expect(warn).toHaveBeenCalledWith(expect.stringContaining('updatedInput')) + }) +}) + +describe('hooks-claude coverage — empty/no-op outcomes and no-agent paths', () => { + it('a clean exit-0 hook with no output is a no-op (contextFrom empty → next())', async () => { + const d = dir() + const s = sh(d, 'noop.sh', '#!/usr/bin/env bash\nexit 0\n') + const path = hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('ran')]) + const ctx = await harness(path, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + // The prompt proceeded unchanged; no context/message injected. + expect(adapter.requests).toHaveLength(1) + expect(events(agent).some(e => e.type === 'context/message')).toBe(false) + }) + + it('a PreToolUse hook fires for a no-agent direct tool call (no session/turn to record into)', async () => { + const d = dir() + const s = sh(d, 'deny.sh', '#!/usr/bin/env bash\necho "no" >&2\nexit 2\n') + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const ctx = await harness(path, new MockAdapter([])) + let ran = false + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'x' }] } })) + // Call execute() directly with NO agent — the bridge's no-agent/no-turn path. + const { CallId } = await import('@deepseek-ai/dsh-llm') + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'echo', arguments: {} }) + expect(ran).toBe(false) + expect(result.isError).toBe(true) + }) + + it('a long stderr is truncated in the hook/result summary', async () => { + const d = dir() + // Emit >500 chars of stderr then exit 2. + const s = sh(d, 'long.sh', '#!/usr/bin/env bash\nprintf "x%.0s" {1..600} >&2\nexit 2\n') + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && res.data.stderrSummary?.endsWith('…')).toBe(true) + }) +}) + +describe('hooks-claude coverage — Stop continuation + subagent inject/catch', () => { + it('a Stop hook that blocks (exit 2) forces the turn to continue (CC dialect)', async () => { + const d = dir() + const marker = join(d, 'fired') + const s = sh(d, 'stop.sh', `#!/usr/bin/env bash\nif [ -e "${marker}" ]; then exit 0; fi\ntouch "${marker}"\necho "continue please" >&2\nexit 2\n`) + const path = hooks(d, { Stop: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('one'), textResponse('two')]) + const ctx = await harness(path, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(2) + expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('continue please') + }) + + it('SubagentStart additionalContext is injected into a REGISTERED live child', async () => { + const d = dir() + const s = sh(d, 'sa.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SubagentStart","additionalContext":"child guidance"}}\'\n') + const path = hooks(d, { SubagentStart: [{ hooks: [{ type: 'command', command: s }] }] }) + const ctx = await harness(path, new MockAdapter([])) + // Register a fake child agent under the id the event carries. + const injected: string[] = [] + const child = { id: AgentId('child-x'), inject: (content: { type: string; text?: string }[]) => { injected.push(content.map(b => b.text ?? '').join('')) }, session: { header: { id: 'child-x' } } } as unknown as Parameters[0] + ctx.agents.register(child) + ctx.emit('subagent/start', { provider: 'p', id: AgentId('child-x'), agentType: 'r' }) + await new Promise(r => setTimeout(r, 80)) + expect(injected).toContain('child guidance') + }) + + it('a throwing SubagentStart/SubagentStop hook run is contained (logged)', async () => { + const d = dir() + // A hook command that does not exist makes runHook resolve a non-blocking + // error (not a throw), so to hit the .catch we make the .then throw: register + // a child whose inject throws for SubagentStart. + const s = sh(d, 'sa.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SubagentStart","additionalContext":"x"}}\'\n') + const path = hooks(d, { SubagentStart: [{ hooks: [{ type: 'command', command: s }] }] }) + const ctx = await harness(path, new MockAdapter([])) + const warn = vi.fn(); ctx.logger.warn = warn as never + const child = { id: AgentId('child-y'), inject: () => { throw new Error('inject boom') }, session: { header: { id: 'child-y' } } } as unknown as Parameters[0] + ctx.agents.register(child) + ctx.emit('subagent/start', { provider: 'p', id: AgentId('child-y') }) + await new Promise(r => setTimeout(r, 80)) + expect(warn).toHaveBeenCalledWith(expect.stringContaining('SubagentStart hook failed')) + }) +}) + +describe('hooks-claude coverage — default reasons + sparse payloads', () => { + it('PreToolUse deny with EMPTY stderr uses the default reason', async () => { + const d = dir() + const s = sh(d, 'deny.sh', '#!/usr/bin/env bash\nexit 2\n') // exit 2, no stderr + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'x' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('blocked by PreToolUse hook'))).toBe(true) + }) + + it('PostToolUse deny with EMPTY stderr + no context uses the default feedback', async () => { + const d = dir() + const s = sh(d, 'block.sh', '#!/usr/bin/env bash\nexit 2\n') + const path = hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('blocked by PostToolUse hook'))).toBe(true) + }) + + it('SubagentStop with no agentType + a rejecting hook run is contained', async () => { + const d = dir() + // Make the SubagentStop runPoint reject by registering a session whose append + // throws — simplest: a hook that emits invalid output is fine; force the + // .catch by making the session's append throw via a poisoned agent is hard, + // so instead assert the no-agentType payload path runs cleanly (no crash). + const marker = join(d, 'stopran') + const s = sh(d, 'stop.sh', `#!/usr/bin/env bash\ntouch "${marker}"\n`) + const path = hooks(d, { SubagentStop: [{ hooks: [{ type: 'command', command: s }] }] }) + const ctx = await harness(path, new MockAdapter([])) + ctx.emit('subagent/end', { provider: 'p', id: AgentId('child-z'), stopReason: 'completed' }) // no agentType + await new Promise(r => setTimeout(r, 80)) + expect(existsSync(marker)).toBe(true) + }) +}) + +describe('hooks-claude coverage — more default/sparse arms', () => { + it('UserPromptSubmit deny with EMPTY stderr uses the default block reason', async () => { + const d = dir() + const s = sh(d, 'block.sh', '#!/usr/bin/env bash\nexit 2\n') + const path = hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('no')]) + const ctx = await harness(path, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const turnEnd = events(agent).findLast(e => e.type === 'turn/end') + expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason.kind === 'rejected' && turnEnd.data.reason.reason).toContain('blocked by UserPromptSubmit hook') + }) + + it('a PreToolUse ask with NO reason omits the reason (false arm)', async () => { + const d = dir() + const s = sh(d, 'ask.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PreToolUse","permissionDecision":"ask"}}\'\n') + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'x' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + // ask (no reason) → degrades to deny with the registry's generic message. + expect(ran).toBe(false) + expect(events(agent).some(e => e.type === 'tool/result' && e.data.isError)).toBe(true) + }) + + it('a recorded clean exit-0 hook with no stderr omits exitCode-extra/stderrSummary fields', async () => { + const d = dir() + const s = sh(d, 'noop.sh', '#!/usr/bin/env bash\nexit 0\n') + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && res.data.exitCode).toBe(0) + expect(res?.type === 'hook/result' && 'stderrSummary' in res.data).toBe(false) + }) +}) + +describe('hooks-claude coverage — schema-bypass default + unspawnable hook', () => { + it('a direct apply() (schema bypass) defaults the timeout and runs', async () => { + const d = dir() + const marker = join(d, 'ran') + const s = sh(d, 'h.sh', `#!/usr/bin/env bash\ntouch "${marker}"\n`) + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) + // Direct apply with only configPath — bypasses schemastery's defaults, so the + // runtime `defaultTimeoutMs ?? 600_000` fallback is exercised. + HooksClaude.apply(ctx, { configPath: join(d, 'hooks.json') }) + await new Promise(r => setTimeout(r, 10)) + ctx.llm.registerAdapter(['mock'], adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(existsSync(marker)).toBe(true) + }) + + it('a non-zero non-2 hook exit (e.g. a command-not-found 127) is a non-blocking error; the tool still runs', async () => { + const d = dir() + // `bash -c` of a missing program exits 127 — a non-blocking error (not 0, not + // 2 → no decision), so the tool proceeds; the hook/result records exit 127. + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: '/nonexistent/definitely/not/a/command' }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(ran).toBe(true) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && res.data.exitCode).toBe(127) + }) + + it('a PostToolUse deny with empty stderr + no context uses the default feedback (no context arm)', async () => { + const d = dir() + const s = sh(d, 'block.sh', '#!/usr/bin/env bash\nexit 2\n') + const path = hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + }) +}) + +describe('hooks-claude coverage — continue:false, context arm, no-cwd', () => { + it('a hook with {"continue":false} and no decision records decision "stop"', async () => { + const d = dir() + const s = sh(d, 'stop.sh', '#!/usr/bin/env bash\necho \'{"continue":false,"stopReason":"halt"}\'\n') + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && res.data.decision).toBe('stop') + }) + + it('a PostToolUse hook that BOTH blocks AND attaches additionalContext', async () => { + const d = dir() + const s = sh(d, 'b.sh', '#!/usr/bin/env bash\necho \'{"decision":"block","reason":"bad","hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"context too"}}\'\n') + const path = hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('bad'))).toBe(true) + // additionalContext also injected (the block + context arm). + expect(events(agent).some(e => e.type === 'context/message' && e.data.content.some(b => b.type === 'text' && b.text.includes('context too')))).toBe(true) + }) + +}) + +describe('hooks-claude coverage — executor reject + no-open-turn', () => { + it('when the bash executor REJECTS a hook run, the hook/result omits exitCode (non-blocking)', async () => { + const d = dir() + const s = sh(d, 'h.sh', '#!/usr/bin/env bash\nexit 0\n') + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + // Force the executor to reject (an infrastructure fault) so runHook's catch + // yields a HookOutput with exitCode undefined → the `exitCode` spread false arm. + const bash = ctx.bash + bash.run = (() => Promise.reject(new Error('executor down'))) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && 'exitCode' in res.data).toBe(false) + }) + +}) + +describe('hooks-claude coverage — detached-listener catch handlers', () => { + it('a throwing SessionStart inject is contained (logged, agent still runs)', async () => { + const d = dir() + const s = sh(d, 'start.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SessionStart","additionalContext":"x"}}\'\n') + const path = hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(path, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + // Make inject throw, forcing the SessionStart .catch path. + const original = agent.inject.bind(agent) + let threw = false + agent.inject = (() => { threw = true; throw new Error('inject boom') }) + await new Promise(r => setTimeout(r, 80)) + expect(threw).toBe(true) + agent.inject = original + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(1) // loop survived the thrown inject + }) +}) diff --git a/packages/hooks/hooks-claude/tsconfig.json b/packages/hooks/hooks-claude/tsconfig.json new file mode 100644 index 0000000000..909db9b5c3 --- /dev/null +++ b/packages/hooks/hooks-claude/tsconfig.json @@ -0,0 +1,42 @@ +{ + "extends": "../../../tsconfig.base.json", + "compilerOptions": { + "rootDir": "src", + "outDir": "lib/types" + }, + "include": [ + "src" + ], + "references": [ + { + "path": "../../../vendor/cosmokit" + }, + { + "path": "../../../vendor/cordis" + }, + { + "path": "../../../vendor/schemastery" + }, + { + "path": "../hook-protocol" + }, + { + "path": "../../core/agent" + }, + { + "path": "../../core/tools" + }, + { + "path": "../../core/session" + }, + { + "path": "../../subagent/subagent" + }, + { + "path": "../../llm/llm" + }, + { + "path": "../../bash/bash" + } + ] +} diff --git a/packages/hooks/hooks-codex/README.md b/packages/hooks/hooks-codex/README.md new file mode 100644 index 0000000000..39d4fcd5ca --- /dev/null +++ b/packages/hooks/hooks-codex/README.md @@ -0,0 +1,54 @@ +# @deepseek-ai/dsh-hooks-codex + +A cordis plugin that runs a user's existing **Codex** `hooks.json` on the harness's canonical interception seams. The **Codex dialect** half of the hooks subsystem. The dialect-agnostic primitives come from [`@deepseek-ai/dsh-hook-protocol`](../hook-protocol/README.md); this bridge owns the Codex-specific payloads, matcher mode, and decision mapping. + +Codex's hook protocol is a deliberate **subset** of Claude Code's (same `hooks.json` shape): + +- **Five hook points only:** `PreToolUse`, `PostToolUse`, `SessionStart`, `UserPromptSubmit`, `Stop` — no subagent / notification / compaction hooks. +- **Regex-only matchers** (no literal fast path; the matcher is always an unanchored regex). +- **snake_case stdin payloads** with `turn_id`/`model` extras, written **without** a trailing newline. +- **No env vars and no command substitution** (a literal `${…}` in a command survives verbatim). +- **A block-only decision model** — `allow`/`ask` are not honored; a hook can only block, never pre-approve. + +A native cordis plugin could do everything this bridge does, more powerfully; the bridge exists only to run UNMODIFIED external Codex hooks faithfully (see [the interception-seams RFC](../../../docs/rfc/implemented/feature/2026-06-30-interception-seams.md)). + +## Config + +```ts +import type { Config } from '@deepseek-ai/dsh-hooks-codex' +const config: Config = { + configPath: '/path/to/.codex/hooks.json', // required + model: 'deepseek-v4', // optional: stamped on every payload (Codex includes `model`) + defaultTimeoutMs: 600_000, // optional: per-hook timeout when a hook sets none +} +``` + +In a `cordis.yml`: + +```yaml +- dsh-hooks-codex: + configPath: ./.codex/hooks.json + model: deepseek-v4 +``` + +The config is parsed **once** at load; a read/parse failure is contained (logs + registers nothing). Only sync `type: 'command'` hooks run — a non-command or `async: true` hook is parsed-and-skipped with a warning. A hook accepts `timeout` or the `timeoutSec` alias. Events outside the five Codex points are dropped at parse. + +## Hook points → seam Decisions + +| Codex hook | Harness seam | Mapping | +|---|---|---| +| `SessionStart` | `agent/session-start` (emit) | a plain-stdout hook's output → additionalContext → `agent.inject()` | +| `UserPromptSubmit` | `agent/prompt-submit` (waterfall) | `block` (exit 2) → `PromptDecision.block`; additionalContext → `allow` with context | +| `PreToolUse` | `tools/pre-execute` (waterfall) | `block` → `PreToolDecision.deny` (no `allow`/`ask`) | +| `PostToolUse` | `tools/post-execute` (waterfall) | `block` → `block` with feedback; additionalContext → `accept` with context | +| `Stop` | `agent/turn-continuation` (waterfall) | a blocking Stop hook forces `continue` with the reason as next-step steering | + +Codex hardcodes a tool call's `tool_name` to `"Bash"` and `tool_input` to `{ command }` (extracted from the call's arguments, or `''` when absent). The matcher subject is the tool name (`PreToolUse`/`PostToolUse`) or the session source (`SessionStart`); `UserPromptSubmit`/`Stop` ignore matchers. + +## Context source + +Injected context carries an explicit `{ kind: 'plugin', plugin: 'hooks-codex' }` source (`agent.inject()` would otherwise default it to `{ kind: 'user' }`). + +## Deferred + +**Stop loop-guard** (`TODO(stop-loop-guard)`): as in CC, a Stop hook that unconditionally blocks would force-continue every step (`stop_hook_active` is always `false` here); the loop-guard is deferred. A hook author must self-limit until it lands. diff --git a/packages/hooks/hooks-codex/package.json b/packages/hooks/hooks-codex/package.json new file mode 100644 index 0000000000..f26b57fe11 --- /dev/null +++ b/packages/hooks/hooks-codex/package.json @@ -0,0 +1,47 @@ +{ + "name": "@deepseek-ai/dsh-hooks-codex", + "description": "Bridge plugin: run a Codex hooks.json hook config on the DeepSeek Harness interception seams", + "version": "0.0.1", + "private": true, + "type": "module", + "main": "lib/index.js", + "types": "lib/types/index.d.ts", + "exports": { + ".": { + "types": "./lib/types/index.d.ts", + "default": "./lib/index.js" + }, + "./src/*": "./src/*", + "./package.json": "./package.json" + }, + "files": [ + "lib/index.js", + "lib/types/**/*.d.ts", + "lib/types/**/*.d.ts.map", + "src" + ], + "license": "BSD-3-Clause", + "dependencies": { + "schemastery": "^3.18.0" + }, + "peerDependencies": { + "@deepseek-ai/dsh-agent": "^0.0.1", + "@deepseek-ai/dsh-hook-protocol": "^0.0.1", + "@deepseek-ai/dsh-llm": "^0.0.1", + "@deepseek-ai/dsh-session": "^0.0.1", + "@deepseek-ai/dsh-tools": "^0.0.1", + "cordis": "^4.0.0-rc.6" + }, + "devDependencies": { + "@deepseek-ai/dsh-agent": "workspace:^", + "@deepseek-ai/dsh-agent-loop": "workspace:^", + "@deepseek-ai/dsh-bash": "workspace:^", + "@deepseek-ai/dsh-bash-local": "workspace:^", + "@deepseek-ai/dsh-hook-protocol": "workspace:^", + "@deepseek-ai/dsh-llm": "workspace:^", + "@deepseek-ai/dsh-session": "workspace:^", + "@deepseek-ai/dsh-system-prompt": "workspace:^", + "@deepseek-ai/dsh-tools": "workspace:^", + "cordis": "^4.0.0-rc.6" + } +} diff --git a/packages/hooks/hooks-codex/src/config.ts b/packages/hooks/hooks-codex/src/config.ts new file mode 100644 index 0000000000..411f058eea --- /dev/null +++ b/packages/hooks/hooks-codex/src/config.ts @@ -0,0 +1,79 @@ +/** + * Parse a Codex `hooks.json` into the shared {@link MatcherGroup} shape. Codex's + * config format is a SUBSET of Claude Code's: the same event-name → matcher-group + * structure and the same `{ type: 'command', command, timeout?/timeoutSec? }` + * hook shape, but only five events and NO command-string substitution (Codex sets + * no hook env vars and does not expand `${…}`). Non-command hooks (and Codex's + * `async: true` commands) are parsed-and-skipped with a warning. + * + * @module @deepseek-ai/dsh-hooks-codex/config + */ + +import type { MatcherGroup } from '@deepseek-ai/dsh-hook-protocol' + +/** The five hook points Codex's engine supports. */ +export const CODEX_EVENTS = ['PreToolUse', 'PostToolUse', 'SessionStart', 'UserPromptSubmit', 'Stop'] as const + +/** A parsed Codex config: event name → its matcher groups (command hooks only). */ +export type CodexHookConfig = Record + +/** A skipped non-command (or async) hook, surfaced so the bridge can warn. */ +export interface SkippedHook { + event: string + reason: string +} + +/** The outcome of parsing one Codex config file. */ +export interface ParsedCodexConfig { + config: CodexHookConfig + skipped: SkippedHook[] +} + +function asObject(value: unknown): Record | undefined { + return typeof value === 'object' && value !== null && !Array.isArray(value) + ? value as Record + : undefined +} + +/** + * Parse a raw Codex `hooks.json` object into runnable {@link MatcherGroup}s. + * Only the five {@link CODEX_EVENTS} are honored; an unknown event is dropped. + * `type !== 'command'` and `async: true` command hooks are skipped (recorded in + * `skipped`). Malformed entries are ignored rather than thrown — a bad config + * must not crash boot. No command substitution (Codex does none). + */ +export function parseCodexConfig(raw: unknown): ParsedCodexConfig { + const config: CodexHookConfig = {} + const skipped: SkippedHook[] = [] + const root = asObject(raw) + const hooksMap = root ? asObject(root.hooks) ?? root : undefined + if (!hooksMap) return { config, skipped } + + for (const event of CODEX_EVENTS) { + const rawGroups = hooksMap[event] + if (!Array.isArray(rawGroups)) continue + const groups: MatcherGroup[] = [] + for (const rawGroup of rawGroups) { + const group = asObject(rawGroup) + if (!group || !Array.isArray(group.hooks)) continue + const commands: MatcherGroup['hooks'] = [] + for (const rawHook of group.hooks) { + const hook = asObject(rawHook) + if (!hook) continue + const type = typeof hook.type === 'string' ? hook.type : 'command' + if (type !== 'command') { skipped.push({ event, reason: `unsupported "${type}" hook` }); continue } + if (hook.async === true) { skipped.push({ event, reason: 'async hook' }); continue } + if (typeof hook.command !== 'string') continue + // Codex accepts `timeout` or the `timeoutSec` alias. + const timeout = typeof hook.timeout === 'number' ? hook.timeout + : typeof hook.timeoutSec === 'number' ? hook.timeoutSec : undefined + commands.push({ command: hook.command, ...timeout !== undefined ? { timeoutSec: timeout } : {} }) + } + if (commands.length === 0) continue + groups.push({ ...typeof group.matcher === 'string' ? { matcher: group.matcher } : {}, hooks: commands }) + } + if (groups.length > 0) config[event] = groups + } + + return { config, skipped } +} diff --git a/packages/hooks/hooks-codex/src/index.ts b/packages/hooks/hooks-codex/src/index.ts new file mode 100644 index 0000000000..127511389d --- /dev/null +++ b/packages/hooks/hooks-codex/src/index.ts @@ -0,0 +1,235 @@ +/** + * `dsh-hooks-codex` — a bridge plugin that runs a user's existing Codex + * `hooks.json` on the harness's canonical interception seams. The CODEX DIALECT + * half of the hooks subsystem. + * + * Codex's hook protocol is a deliberate SUBSET of Claude Code's: five hook points + * (`PreToolUse`, `PostToolUse`, `SessionStart`, `UserPromptSubmit`, `Stop` — no + * subagent/notification/compaction), regex-only matchers, snake_case stdin + * payloads with `turn_id`/`model` extras and NO trailing newline, no env vars and + * no command substitution, and a block-only decision model (allow/ask are not + * honored — a hook can only block, never pre-approve). The dialect-agnostic + * primitives come from `@deepseek-ai/dsh-hook-protocol`; this bridge owns the + * Codex-specific payloads + matcher mode + decision mapping. + * + * @module @deepseek-ai/dsh-hooks-codex + */ + +import { readFileSync } from 'node:fs' +import type { Context } from 'cordis' +import z from 'schemastery' +import type { Agent, ContinuationDecision, HookContext, PromptDecision } from '@deepseek-ai/dsh-agent' +import type { ContentBlock, MessageSource } from '@deepseek-ai/dsh-llm' +import type { PostToolDecision, PreToolDecision, ToolExecution, ToolExecutionResult } from '@deepseek-ai/dsh-tools' +import { + appendHookInvoked, + appendHookResult, + matchesMatcher, + mergeHookOutputs, + runHook, + type HookOutput, + type MatcherGroup, + type MergedHookOutcome, +} from '@deepseek-ai/dsh-hook-protocol' +import { parseCodexConfig, type CodexHookConfig } from './config.ts' + +export const name = 'hooks-codex' +export const inject = ['bash'] + +/** Plugin config: where the Codex hooks.json lives + the model name for payloads. */ +export interface Config { + /** Path to a Codex `hooks.json`. */ + configPath: string + /** The model name stamped on every payload (Codex includes `model` on each event). */ + model?: string + /** Default per-hook timeout in ms when a hook sets none (Codex default: 600000). */ + defaultTimeoutMs?: number +} + +export const Config: z = z.object({ + configPath: z.string().required(), + model: z.string().default(''), + defaultTimeoutMs: z.number().default(600_000), +}) + +let handlerCounter = 0 +function nextHandlerId(point: string): string { + return `codex:${point}:${++handlerCounter}` +} + +const PLUGIN_SOURCE: MessageSource = { kind: 'plugin', plugin: 'hooks-codex' } + +function summarize(stderr: string): string | undefined { + const t = stderr.trim() + if (t.length === 0) return undefined + return t.length > 500 ? t.slice(0, 500) + '…' : t +} + +export function apply(ctx: Context, config: Config): void { + let parsed: CodexHookConfig = {} + try { + const raw: unknown = JSON.parse(readFileSync(config.configPath, 'utf8')) + const result = parseCodexConfig(raw) + parsed = result.config + for (const s of result.skipped) { + ctx.logger.warn(`hooks-codex: skipping ${s.reason} on ${s.event} (only sync command hooks run)`) + } + } catch (error: unknown) { + ctx.logger.warn(`hooks-codex: could not load hook config "${config.configPath}": ${String(error)} — no hooks registered`) + return + } + + const defaultTimeoutMs = config.defaultTimeoutMs ?? 600_000 + const model = config.model ?? '' + + async function runPoint( + point: string, + matchQuery: string, + payload: unknown, + opts: { agent?: Agent; turn?: number; signal?: AbortSignal }, + ): Promise { + const groups: MatcherGroup[] = parsed[point] ?? [] + const outputs: HookOutput[] = [] + for (const group of groups) { + // Codex matches with PURE regex (no literal fast path). + if (!matchesMatcher(group.matcher, matchQuery, 'codex')) continue + for (const hook of group.hooks) { + const handlerId = nextHandlerId(point) + const session = opts.agent?.session + if (session && opts.turn !== undefined) { + appendHookInvoked(session, { + turn: opts.turn, point, dialect: 'codex', handlerId, + ...group.matcher !== undefined ? { matcher: group.matcher } : {}, + }) + } + const { output, durationMs } = await runHook(ctx.bash, hook, { + payload, + ...opts.signal ? { signal: opts.signal } : {}, + defaultTimeoutMs, + trailingNewline: false, // Codex writes stdin WITHOUT a trailing newline. + }, () => performance.now()) + outputs.push(output) + if (session && opts.turn !== undefined) { + const stderrSummary = summarize(output.stderr) + appendHookResult(session, { + turn: opts.turn, point, handlerId, + decision: output.decision ?? (output.continue === false ? 'stop' : 'pass'), + ...output.exitCode !== undefined ? { exitCode: output.exitCode } : {}, + ...stderrSummary !== undefined ? { stderrSummary } : {}, + durationMs, + }) + } + } + } + return mergeHookOutputs(outputs) + } + + function contextFrom(merged: MergedHookOutcome): HookContext | undefined { + if (merged.additionalContext.length === 0) return undefined + const content: ContentBlock[] = merged.additionalContext.map(text => ({ type: 'text', text })) + return { content, source: PLUGIN_SOURCE } + } + + // SessionStart: emit. Codex passes a plain-stdout hook's output as additionalContext. + ctx.on('agent/session-start', (agent, source) => { + void runPoint('SessionStart', source, { ...base(agent, 'SessionStart', model), source }, { agent }) + .then((merged) => { + const context = contextFrom(merged) + if (context) agent.inject(context.content, { source: context.source }) + }) + .catch((error: unknown) => { ctx.logger.warn(`hooks-codex: SessionStart hook failed: ${String(error)}`) }) + }) + + // UserPromptSubmit → PromptDecision. Codex can only BLOCK (no allow/ask). + ctx.on('agent/prompt-submit', async (agent, content, _source, next): Promise => { + const turn = lastTurn(agent) + const merged = await runPoint('UserPromptSubmit', '', { ...turnBase(agent, 'UserPromptSubmit', model), prompt: blocksToText(content) }, { agent, turn }) + if (merged.decision === 'deny') return { kind: 'block', reason: merged.reason ?? 'blocked by UserPromptSubmit hook' } + const context = contextFrom(merged) + if (context) return { kind: 'allow', additionalContext: context } + return next() + }) + + // PreToolUse → PreToolDecision. Codex blocks only (no allow/ask honored). + ctx.on('tools/pre-execute', async (exec, next): Promise => { + const turn = lastTurn(exec.agent) + const merged = await runPoint('PreToolUse', exec.name, preToolPayload(exec, model), { ...exec.agent ? { agent: exec.agent } : {}, turn, ...exec.signal ? { signal: exec.signal } : {} }) + if (merged.decision === 'deny') return { kind: 'deny', reason: merged.reason ?? 'blocked by PreToolUse hook' } + return next() + }) + + // PostToolUse → PostToolDecision (block with feedback, or attach context). + ctx.on('tools/post-execute', async (exec, result, next): Promise => { + const turn = lastTurn(exec.agent) + const merged = await runPoint('PostToolUse', exec.name, postToolPayload(exec, result, model), { ...exec.agent ? { agent: exec.agent } : {}, turn, ...exec.signal ? { signal: exec.signal } : {} }) + const context = contextFrom(merged) + if (merged.decision === 'deny') { + return { kind: 'block', feedback: [{ type: 'text', text: merged.reason ?? 'blocked by PostToolUse hook' }], ...context ? { additionalContext: context } : {} } + } + if (context) return { kind: 'accept', additionalContext: context } + return next() + }) + + // Stop → ContinuationDecision. A blocking Stop hook forces continuation. + // TODO(stop-loop-guard): like CC, a Stop hook that unconditionally blocks would + // force-continue every step (`stop_hook_active` is always false here); the + // loop-guard (stop_hook_active + a max-consecutive cap) is deferred. + ctx.on('agent/turn-continuation', async (agent, turn, _default, next): Promise => { + const merged = await runPoint('Stop', '', { ...turnBase(agent, 'Stop', model), stop_hook_active: false, last_assistant_message: null }, { agent, turn }) + if (merged.decision === 'deny' && merged.reason !== undefined) { + return { action: 'continue', reason: { content: [{ type: 'text', text: merged.reason }], source: PLUGIN_SOURCE } } + } + return next() + }) +} + +// --- Codex DIALECT payloads: snake_case, model on every event, turn_id on +// turn-scoped events. --- + +function lastTurn(agent: Agent | undefined): number { + if (!agent) return 0 + const last = [...agent.session.events].findLast(e => e.type === 'turn/start') + /* v8 ignore next -- the `: 0` arm is a defensive fallback: when an agent is + present, lastTurn is only called from the mid-turn seams, which always run + inside an open turn, so `last` is always a turn/start here. */ + return last?.type === 'turn/start' ? last.data.turn : 0 +} + +function blocksToText(content: ContentBlock[]): string { + return content.filter((b): b is Extract => b.type === 'text').map(b => b.text).join('') +} + +/** Base fields on every Codex payload (no turn_id). */ +function base(agent: Agent | undefined, event: string, model: string): Record { + return { + session_id: agent?.session.header.id ?? '', + transcript_path: null, + cwd: agent?.session.header.cwd ?? process.cwd(), + hook_event_name: event, + model, + permission_mode: 'default', + } +} + +/** Base + turn_id, for the turn-scoped events (PreToolUse/PostToolUse/UserPromptSubmit/Stop). */ +function turnBase(agent: Agent | undefined, event: string, model: string): Record { + return { ...base(agent, event, model), turn_id: String(lastTurn(agent)) } +} + +/** Extract a `command` string from a tool call's parsed arguments, else ''. */ +function commandOf(args: unknown): string { + if (typeof args === 'object' && args !== null && 'command' in args) { + const command: unknown = args.command + if (typeof command === 'string') return command + } + return '' +} + +function preToolPayload(exec: ToolExecution, model: string): Record { + // Codex hardcodes tool_name to "Bash" and tool_input to { command }. + return { ...turnBase(exec.agent, 'PreToolUse', model), tool_name: 'Bash', tool_input: { command: commandOf(exec.arguments) }, tool_use_id: exec.callId } +} + +function postToolPayload(exec: ToolExecution, result: ToolExecutionResult, model: string): Record { + return { ...turnBase(exec.agent, 'PostToolUse', model), tool_name: 'Bash', tool_input: { command: commandOf(exec.arguments) }, tool_use_id: exec.callId, tool_response: blocksToText(result.content) } +} diff --git a/packages/hooks/hooks-codex/tests/bridge.spec.ts b/packages/hooks/hooks-codex/tests/bridge.spec.ts new file mode 100644 index 0000000000..f62fa4d66c --- /dev/null +++ b/packages/hooks/hooks-codex/tests/bridge.spec.ts @@ -0,0 +1,167 @@ +import { afterEach, describe, expect, it } from 'vitest' +import { mkdtempSync, rmSync, writeFileSync, chmodSync } from 'node:fs' +import { tmpdir } from 'node:os' +import { join } from 'node:path' +import { Context } from 'cordis' +import Loader from '@cordisjs/plugin-loader' +import LlmService from '@deepseek-ai/dsh-llm' +import SessionStore, { type SessionEvent } from '@deepseek-ai/dsh-session' +import SystemPrompt from '@deepseek-ai/dsh-system-prompt' +import ToolRegistry, { defineTool } from '@deepseek-ai/dsh-tools' +import AgentRegistry, { AgentId } from '@deepseek-ai/dsh-agent' +import AgentLoop, { type ReactLoopAgent } from '@deepseek-ai/dsh-agent-loop' +import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local' +import * as HooksCodex from '@deepseek-ai/dsh-hooks-codex' +import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts' + +/** + * Full-loop Codex-bridge tests: scripted mock MODEL + REAL loop + REAL bash + + * REAL `dsh-hooks-codex` running REAL shell scripts from a temp `hooks.json`. + * Codex dialect specifics exercised here: regex matcher (substring), block-only + * decisions, the five-event subset. + */ + +const dirs: string[] = [] +afterEach(() => { for (const d of dirs.splice(0)) rmSync(d, { recursive: true, force: true }) }) + +function configDir(): string { + const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-codex-')) + dirs.push(dir) + return dir +} +function script(dir: string, name: string, body: string): string { + const path = join(dir, name) + writeFileSync(path, body) + chmodSync(path, 0o755) + return path +} +function writeHooks(dir: string, hooks: unknown): void { + writeFileSync(join(dir, 'hooks.json'), JSON.stringify({ hooks })) +} + +async function harness(dir: string, adapter: MockAdapter): Promise { + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) + await ctx.plugin(HooksCodex, { configPath: join(dir, 'hooks.json'), model: 'test-model' }) + ctx.llm.registerAdapter(['mock'], adapter) + return ctx +} + +function waitForIdle(ctx: Context, agent: ReactLoopAgent): Promise { + return new Promise((resolve) => { + const dispose = ctx.on('agent/status', (subject, status) => { + if (subject === agent && status === 'idle') { dispose(); resolve() } + }) + }) +} +function events(agent: ReactLoopAgent): SessionEvent[] { return [...agent.session.events] } + +describe('hooks-codex bridge', () => { + it('a PreToolUse hook (exit 2) denies a tool the regex matcher matches as a substring', async () => { + const dir = configDir() + const deny = script(dir, 'deny.sh', '#!/usr/bin/env bash\necho "codex blocked it" >&2\nexit 2\n') + // Codex regex matcher: "Bash" is /Bash/ — matches the tool name "Bash". + writeHooks(dir, { PreToolUse: [{ matcher: 'Bash', hooks: [{ type: 'command', command: deny }] }] }) + + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'ls' }), textResponse('done')]) + const ctx = await harness(dir, adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { ran = true; return [{ type: 'text', text: 'no' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'run ls' }]) + await waitForIdle(ctx, agent) + + expect(ran).toBe(false) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('codex blocked it'))).toBe(true) + // recorded under the codex dialect + expect(events(agent).some(e => e.type === 'hook/invoked' && e.data.dialect === 'codex' && e.data.point === 'PreToolUse')).toBe(true) + }) + + it('a Stop hook (exit 2) forces the turn to continue with the reason as steering', async () => { + const dir = configDir() + // Block exactly ONCE (a marker file), then allow — without a one-shot guard a + // hook that always exits 2 would force-continue forever (the deferred + // stop_hook_active loop-guard is the real fix; here we self-limit so the test + // exercises the continue path without looping). + const marker = join(dir, 'fired') + const cont = script(dir, 'cont.sh', `#!/usr/bin/env bash\nif [ -e "${marker}" ]; then exit 0; fi\ntouch "${marker}"\necho "keep going: address the goal" >&2\nexit 2\n`) + writeHooks(dir, { Stop: [{ hooks: [{ type: 'command', command: cont }] }] }) + + // Step 1 has no tool calls → would stop; the Stop hook forces step 2. + const adapter = new MockAdapter([textResponse('first answer'), textResponse('second answer after goal')]) + const ctx = await harness(dir, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + + // The Stop hook's reason became next-step steering → a second model request ran. + expect(adapter.requests).toHaveLength(2) + expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('keep going: address the goal') + }) + + it('only the five Codex events are honored — a SubagentStop entry is ignored', async () => { + const dir = configDir() + const s = script(dir, 'x.sh', '#!/usr/bin/env bash\nexit 2\n') + // SubagentStop is NOT a Codex event; it must be dropped (no crash, no effect). + writeHooks(dir, { SubagentStop: [{ hooks: [{ type: 'command', command: s }] }] }) + + const adapter = new MockAdapter([textResponse('fine')]) + const ctx = await harness(dir, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + // Ran normally; the unknown event was dropped at parse. + expect(adapter.requests).toHaveLength(1) + }) + + it('a missing config registers no hooks and does not crash', async () => { + const dir = configDir() // no hooks.json written + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(dir, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(1) + }) + + it('disposing the bridge fiber is clean (HMR safety)', async () => { + const dir = configDir() + writeHooks(dir, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'true' }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) + const fiber = await ctx.plugin(HooksCodex, { configPath: join(dir, 'hooks.json'), model: 'm' }) + await fiber.dispose() + ctx.llm.registerAdapter(['mock'], adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(1) + }) + + it('has the namespace-plugin export shape (no stray default) so the Loader keeps name/inject/apply', () => { + expect('default' in HooksCodex).toBe(false) + expect(HooksCodex.name).toBe('hooks-codex') + expect(HooksCodex.inject).toEqual(['bash']) + const loader = Object.create(Loader.prototype) as Loader + const unwrapped = loader.unwrapExports(HooksCodex) as Record + expect(unwrapped).toBe(HooksCodex) + expect(unwrapped.name).toBe('hooks-codex') + expect(unwrapped.inject).toEqual(['bash']) + expect(typeof unwrapped.apply).toBe('function') + }) +}) diff --git a/packages/hooks/hooks-codex/tests/config.spec.ts b/packages/hooks/hooks-codex/tests/config.spec.ts new file mode 100644 index 0000000000..e79d665931 --- /dev/null +++ b/packages/hooks/hooks-codex/tests/config.spec.ts @@ -0,0 +1,68 @@ +import { describe, expect, it } from 'vitest' +import { parseCodexConfig, CODEX_EVENTS } from '@deepseek-ai/dsh-hooks-codex/src/config.ts' + +describe('parseCodexConfig', () => { + it('honors only the five Codex events, dropping unknown ones', () => { + const { config } = parseCodexConfig({ + PreToolUse: [{ hooks: [{ type: 'command', command: 'a.sh' }] }], + SubagentStop: [{ hooks: [{ type: 'command', command: 'b.sh' }] }], // not a Codex event + Notification: [{ hooks: [{ type: 'command', command: 'c.sh' }] }], // not a Codex event + }) + expect(Object.keys(config)).toEqual(['PreToolUse']) + expect(CODEX_EVENTS).toContain('PreToolUse') + expect(CODEX_EVENTS).not.toContain('SubagentStop' as never) + }) + + it('accepts both timeout and the timeoutSec alias, no substitution', () => { + const { config } = parseCodexConfig({ + Stop: [{ hooks: [{ type: 'command', command: '${NOT_SUBSTITUTED}/s.sh', timeout: 10 }] }], + UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'u.sh', timeoutSec: 20 }] }], + }) + // Codex does NO substitution — the literal ${…} survives. + expect(config.Stop).toEqual([{ hooks: [{ command: '${NOT_SUBSTITUTED}/s.sh', timeoutSec: 10 }] }]) + expect(config.UserPromptSubmit).toEqual([{ hooks: [{ command: 'u.sh', timeoutSec: 20 }] }]) + }) + + it('skips non-command and async:true hooks (recorded)', () => { + const { config, skipped } = parseCodexConfig({ + PreToolUse: [{ hooks: [ + { type: 'prompt' }, + { type: 'command', command: 'sync.sh' }, + { type: 'command', command: 'bg.sh', async: true }, + ] }], + }) + expect(config.PreToolUse).toEqual([{ hooks: [{ command: 'sync.sh' }] }]) + expect(skipped).toEqual([{ event: 'PreToolUse', reason: 'unsupported "prompt" hook' }, { event: 'PreToolUse', reason: 'async hook' }]) + }) + + it('parses the { hooks: … } wrapper and the bare map identically', () => { + const groups = { Stop: [{ hooks: [{ type: 'command', command: 's.sh' }] }] } + expect(parseCodexConfig(groups).config).toEqual(parseCodexConfig({ hooks: groups }).config) + }) + + it('drops malformed entries and a non-object top level without throwing', () => { + expect(parseCodexConfig(null).config).toEqual({}) + expect(parseCodexConfig({ PreToolUse: 'no' }).config).toEqual({}) + expect(parseCodexConfig({ Stop: [7, { hooks: 'x' }, { hooks: [{ type: 'command', command: 9 }] }] }).config).toEqual({}) + }) + + it('skips a non-object element inside a hooks array, keeping the valid sibling', () => { + const { config } = parseCodexConfig({ Stop: [{ hooks: [null, 7, { type: 'command', command: 's.sh' }] }] }) + expect(config.Stop).toEqual([{ hooks: [{ command: 's.sh' }] }]) + }) + + it('treats a hook with no `type` field as a command (the default)', () => { + const { config } = parseCodexConfig({ Stop: [{ hooks: [{ command: 's.sh' }] }] }) + expect(config.Stop).toEqual([{ hooks: [{ command: 's.sh' }] }]) + }) + + it('omits the matcher key for a match-all group', () => { + const { config } = parseCodexConfig({ Stop: [{ hooks: [{ type: 'command', command: 's.sh' }] }] }) + expect('matcher' in config.Stop![0]!).toBe(false) + }) + + it('keeps a matcher when present', () => { + const { config } = parseCodexConfig({ PreToolUse: [{ matcher: '^Bash$', hooks: [{ type: 'command', command: 'b.sh' }] }] }) + expect(config.PreToolUse![0]!.matcher).toBe('^Bash$') + }) +}) diff --git a/packages/hooks/hooks-codex/tests/coverage.spec.ts b/packages/hooks/hooks-codex/tests/coverage.spec.ts new file mode 100644 index 0000000000..732e0a7c61 --- /dev/null +++ b/packages/hooks/hooks-codex/tests/coverage.spec.ts @@ -0,0 +1,308 @@ +import { afterEach, describe, expect, it, vi } from 'vitest' +import { mkdtempSync, rmSync, writeFileSync, chmodSync, existsSync, readFileSync } from 'node:fs' +import { tmpdir } from 'node:os' +import { join } from 'node:path' +import { Context } from 'cordis' +import LlmService from '@deepseek-ai/dsh-llm' +import SessionStore, { type SessionEvent } from '@deepseek-ai/dsh-session' +import SystemPrompt from '@deepseek-ai/dsh-system-prompt' +import ToolRegistry, { defineTool } from '@deepseek-ai/dsh-tools' +import AgentRegistry, { AgentId } from '@deepseek-ai/dsh-agent' +import AgentLoop, { type ReactLoopAgent } from '@deepseek-ai/dsh-agent-loop' +import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local' +import * as HooksCodex from '@deepseek-ai/dsh-hooks-codex' +import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts' + +const dirs: string[] = [] +afterEach(() => { for (const d of dirs.splice(0)) rmSync(d, { recursive: true, force: true }) }) +function dir(): string { const d = mkdtempSync(join(tmpdir(), 'dsh-hx-cov-')); dirs.push(d); return d } +function sh(d: string, name: string, body: string): string { + const p = join(d, name); writeFileSync(p, body); chmodSync(p, 0o755); return p +} +function hooks(d: string, h: unknown): string { + writeFileSync(join(d, 'hooks.json'), JSON.stringify({ hooks: h })); return join(d, 'hooks.json') +} + +async function harness(configPath: string, adapter: MockAdapter): Promise { + const ctx = new Context() + await ctx.plugin(LlmService); await ctx.plugin(SessionStore); await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry); await ctx.plugin(AgentRegistry); await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) + await ctx.plugin(HooksCodex, { configPath, model: 'm' }) + ctx.llm.registerAdapter(['mock'], adapter) + return ctx +} +function waitForIdle(ctx: Context, agent: ReactLoopAgent): Promise { + return new Promise((resolve) => { const d = ctx.on('agent/status', (s, st) => { if (s === agent && st === 'idle') { d(); resolve() } }) }) +} +function events(agent: ReactLoopAgent): SessionEvent[] { return [...agent.session.events] } + +describe('hooks-codex coverage — decision mapping paths', () => { + it('UserPromptSubmit block (exit 2) → rejected turn; default reason on empty stderr', async () => { + const d = dir() + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'b.sh', '#!/usr/bin/env bash\nexit 2\n') }] }] }) + const adapter = new MockAdapter([textResponse('no')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(0) + const te = events(agent).findLast(e => e.type === 'turn/end') + expect(te?.type === 'turn/end' && te.data.reason.kind).toBe('rejected') + }) + + it('UserPromptSubmit additionalContext is injected; a no-op hook proceeds', async () => { + const d = dir() + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'c.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"ctx-x"}}\'\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('ctx-x') + }) + + it('SessionStart additionalContext is injected for the first request', async () => { + const d = dir() + hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SessionStart","additionalContext":"start-ctx"}}\'\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + await new Promise(r => setTimeout(r, 60)) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('start-ctx') + }) + + it('PostToolUse block (exit 2) → isError feedback; default reason', async () => { + const d = dir() + hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'p.sh', '#!/usr/bin/env bash\nexit 2\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'ls' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const r = events(agent).find(e => e.type === 'tool/result') + expect(r?.type === 'tool/result' && r.data.isError).toBe(true) + expect(r?.type === 'tool/result' && r.data.content.some(b => b.type === 'text' && b.text.includes('blocked by PostToolUse hook'))).toBe(true) + }) + + it('PostToolUse additionalContext (clean exit) is attached after the result', async () => { + const d = dir() + hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'pc.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"post-ctx"}}\'\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'ls' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(events(agent).some(e => e.type === 'context/message' && e.data.content.some(b => b.type === 'text' && b.text.includes('post-ctx')))).toBe(true) + }) + + it('PreToolUse for a tool call WITHOUT a command arg passes an empty command (commandOf non-object/missing arm)', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'pre.sh', '#!/usr/bin/env bash\ncat >/dev/null\nexit 0\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', {}), textResponse('done')]) // no command arg + const ctx = await harness(join(d, 'hooks.json'), adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(ran).toBe(true) // clean-exit hook allows; commandOf returned '' + }) + + it('a clean exit-0 hook records exitCode 0 and omits stderrSummary', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'n.sh', '#!/usr/bin/env bash\nexit 0\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && res.data.exitCode).toBe(0) + expect(res?.type === 'hook/result' && 'stderrSummary' in res.data).toBe(false) + }) + + it('a long stderr is truncated in the hook/result summary', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'l.sh', '#!/usr/bin/env bash\nprintf "x%.0s" {1..600} >&2\nexit 2\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && res.data.stderrSummary?.endsWith('…')).toBe(true) + }) + + it('warns on a skipped async hook and a direct apply() defaults the timeout', async () => { + const d = dir() + const marker = join(d, 'ran') + hooks(d, { UserPromptSubmit: [{ hooks: [ + { type: 'command', command: 'bg.sh', async: true }, // skipped → warn + { type: 'command', command: sh(d, 'h.sh', `#!/usr/bin/env bash\ntouch "${marker}"\n`) }, + ] }] }) + const warn = vi.fn() + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = new Context() + await ctx.plugin(LlmService); await ctx.plugin(SessionStore); await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry); await ctx.plugin(AgentRegistry); await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) + ctx.logger.warn = warn as never + // Direct apply (schema bypass) → defaultTimeoutMs ?? 600_000 + model ?? '' fallbacks. + HooksCodex.apply(ctx, { configPath: join(d, 'hooks.json') }) + await new Promise(r => setTimeout(r, 10)) + ctx.llm.registerAdapter(['mock'], adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(existsSync(marker)).toBe(true) + expect(warn).toHaveBeenCalledWith(expect.stringContaining('async hook')) + }) + + it('a no-op clean hook proceeds (contextFrom empty → next)', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'n.sh', '#!/usr/bin/env bash\nexit 0\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(ran).toBe(true) + }) + + it('SessionStart with no additionalContext is a no-op (contextFrom empty)', async () => { + const d = dir() + hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', '#!/usr/bin/env bash\nexit 0\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + await new Promise(r => setTimeout(r, 60)) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(events(agent).some(e => e.type === 'context/message')).toBe(false) + }) + + it('a throwing SessionStart inject is contained (logged)', async () => { + const d = dir() + hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SessionStart","additionalContext":"x"}}\'\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const warn = vi.fn(); ctx.logger.warn = warn as never + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.inject = (() => { throw new Error('inject boom') }) + await new Promise(r => setTimeout(r, 60)) + expect(warn).toHaveBeenCalledWith(expect.stringContaining('SessionStart hook failed')) + }) + + it('a clean PreToolUse with no decision allows the tool (no deny)', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'ok.sh', '#!/usr/bin/env bash\nexit 0\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(ran).toBe(true) + }) + + it('a non-matching regex matcher skips the hook (matchesMatcher false → continue)', async () => { + const d = dir() + // /^Edit$/ does not match the tool name "Bash" → the group is skipped. + hooks(d, { PreToolUse: [{ matcher: '^Edit$', hooks: [{ type: 'command', command: sh(d, 'deny.sh', '#!/usr/bin/env bash\nexit 2\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(ran).toBe(true) // matcher didn't match → no hook ran → tool proceeded + expect(events(agent).some(e => e.type === 'hook/invoked')).toBe(false) + }) + + it('a {"continue":false} hook with no decision records decision "stop"', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', '#!/usr/bin/env bash\necho \'{"continue":false,"stopReason":"halt"}\'\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && res.data.decision).toBe('stop') + }) + + it('PreToolUse deny with EMPTY stderr uses the default reason (?? right arm)', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'd.sh', '#!/usr/bin/env bash\nexit 2\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const r = events(agent).find(e => e.type === 'tool/result') + expect(r?.type === 'tool/result' && r.data.content.some(b => b.type === 'text' && b.text.includes('blocked by PreToolUse hook'))).toBe(true) + }) + + it('PostToolUse block AND additionalContext are surfaced together', async () => { + const d = dir() + hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'bc.sh', '#!/usr/bin/env bash\necho \'{"decision":"block","reason":"bad","hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"ctx too"}}\'\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const r = events(agent).find(e => e.type === 'tool/result') + expect(r?.type === 'tool/result' && r.data.isError).toBe(true) + expect(r?.type === 'tool/result' && r.data.content.some(b => b.type === 'text' && b.text.includes('bad'))).toBe(true) + expect(events(agent).some(e => e.type === 'context/message' && e.data.content.some(b => b.type === 'text' && b.text.includes('ctx too')))).toBe(true) + }) + + it('commandOf reads a non-string command arg as an empty command', async () => { + const d = dir() + // The tool-call arguments carry `command` as a NUMBER → commandOf's + // `typeof command === 'string'` false arm → '' (the payload's tool_input.command). + const cap = join(d, 'payload') + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'cap.sh', `#!/usr/bin/env bash\ncat > "${cap}"\nexit 0\n`) }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 7 }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'number' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const payload = JSON.parse(readFileSync(cap, 'utf8')) as { tool_input: { command: string } } + expect(payload.tool_input.command).toBe('') + }) + + it('a no-agent direct PreToolUse run uses process.cwd() and turn 0 (no session to record)', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'd.sh', '#!/usr/bin/env bash\nexit 2\n') }] }] }) + const ctx = await harness(join(d, 'hooks.json'), new MockAdapter([])) + let ran = false + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { ran = true; return [{ type: 'text', text: 'x' }] } })) + const { CallId } = await import('@deepseek-ai/dsh-llm') + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'Bash', arguments: { command: 'x' } }) + expect(ran).toBe(false) // denied + expect(result.isError).toBe(true) + }) + + it('a no-agent direct PostToolUse run attaches context with no session to record', async () => { + const d = dir() + hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'pc.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"x"}}\'\n') }] }] }) + const ctx = await harness(join(d, 'hooks.json'), new MockAdapter([])) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const { CallId } = await import('@deepseek-ai/dsh-llm') + const result = await ctx.tools.execute({ callId: CallId('c1'), name: 'Bash', arguments: { command: 'x' } }) + expect(result.isError).toBeFalsy() + expect(result.additionalContext?.content.some(b => b.type === 'text' && b.text === 'x')).toBe(true) + }) + + it('when the bash executor REJECTS, the hook/result omits exitCode (non-blocking)', async () => { + const d = dir() + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'h.sh', '#!/usr/bin/env bash\nexit 0\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.bash.run = (() => Promise.reject(new Error('executor down'))) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const res = events(agent).find(e => e.type === 'hook/result') + expect(res?.type === 'hook/result' && 'exitCode' in res.data).toBe(false) + }) +}) diff --git a/packages/hooks/hooks-codex/tsconfig.json b/packages/hooks/hooks-codex/tsconfig.json new file mode 100644 index 0000000000..f936b500aa --- /dev/null +++ b/packages/hooks/hooks-codex/tsconfig.json @@ -0,0 +1,39 @@ +{ + "extends": "../../../tsconfig.base.json", + "compilerOptions": { + "rootDir": "src", + "outDir": "lib/types" + }, + "include": [ + "src" + ], + "references": [ + { + "path": "../../../vendor/cosmokit" + }, + { + "path": "../../../vendor/cordis" + }, + { + "path": "../../../vendor/schemastery" + }, + { + "path": "../hook-protocol" + }, + { + "path": "../../core/agent" + }, + { + "path": "../../core/tools" + }, + { + "path": "../../core/session" + }, + { + "path": "../../llm/llm" + }, + { + "path": "../../bash/bash" + } + ] +} diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml index b5ca00356a..9eaa7372b7 100644 --- a/pnpm-lock.yaml +++ b/pnpm-lock.yaml @@ -260,6 +260,83 @@ importers: specifier: ^4.0.0-rc.6 version: 4.0.0-rc.6(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.4) + packages/hooks/hooks-claude: + dependencies: + schemastery: + specifier: ^3.18.0 + version: 3.18.0 + devDependencies: + '@deepseek-ai/dsh-agent': + specifier: workspace:^ + version: link:../../core/agent + '@deepseek-ai/dsh-agent-loop': + specifier: workspace:^ + version: link:../../core/agent-loop + '@deepseek-ai/dsh-bash': + specifier: workspace:^ + version: link:../../bash/bash + '@deepseek-ai/dsh-bash-local': + specifier: workspace:^ + version: link:../../bash/bash-local + '@deepseek-ai/dsh-hook-protocol': + specifier: workspace:^ + version: link:../hook-protocol + '@deepseek-ai/dsh-llm': + specifier: workspace:^ + version: link:../../llm/llm + '@deepseek-ai/dsh-session': + specifier: workspace:^ + version: link:../../core/session + '@deepseek-ai/dsh-subagent': + specifier: workspace:^ + version: link:../../subagent/subagent + '@deepseek-ai/dsh-system-prompt': + specifier: workspace:^ + version: link:../../core/system-prompt + '@deepseek-ai/dsh-tools': + specifier: workspace:^ + version: link:../../core/tools + cordis: + specifier: ^4.0.0-rc.6 + version: 4.0.0-rc.6(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.4) + + packages/hooks/hooks-codex: + dependencies: + schemastery: + specifier: ^3.18.0 + version: 3.18.0 + devDependencies: + '@deepseek-ai/dsh-agent': + specifier: workspace:^ + version: link:../../core/agent + '@deepseek-ai/dsh-agent-loop': + specifier: workspace:^ + version: link:../../core/agent-loop + '@deepseek-ai/dsh-bash': + specifier: workspace:^ + version: link:../../bash/bash + '@deepseek-ai/dsh-bash-local': + specifier: workspace:^ + version: link:../../bash/bash-local + '@deepseek-ai/dsh-hook-protocol': + specifier: workspace:^ + version: link:../hook-protocol + '@deepseek-ai/dsh-llm': + specifier: workspace:^ + version: link:../../llm/llm + '@deepseek-ai/dsh-session': + specifier: workspace:^ + version: link:../../core/session + '@deepseek-ai/dsh-system-prompt': + specifier: workspace:^ + version: link:../../core/system-prompt + '@deepseek-ai/dsh-tools': + specifier: workspace:^ + version: link:../../core/tools + cordis: + specifier: ^4.0.0-rc.6 + version: 4.0.0-rc.6(@cordisjs/plugin-include@1.0.4)(@cordisjs/plugin-loader@1.0.0-rc.4) + packages/llm/llm: devDependencies: '@deepseek-ai/dsh-brand': diff --git a/tsconfig.build.json b/tsconfig.build.json index cf468b4842..4f312fdeed 100644 --- a/tsconfig.build.json +++ b/tsconfig.build.json @@ -41,6 +41,8 @@ { "path": "./packages/subagent/subagent-fork" }, { "path": "./packages/subagent/subagent-acp" }, { "path": "./packages/todo/tool-todo" }, - { "path": "./packages/hooks/hook-protocol" } + { "path": "./packages/hooks/hook-protocol" }, + { "path": "./packages/hooks/hooks-claude" }, + { "path": "./packages/hooks/hooks-codex" } ] } diff --git a/tsconfig.json b/tsconfig.json index 8f2b2c8fb1..456a4fd31a 100644 --- a/tsconfig.json +++ b/tsconfig.json @@ -52,6 +52,8 @@ { "path": "./packages/subagent/subagent-fork" }, { "path": "./packages/subagent/subagent-acp" }, { "path": "./packages/todo/tool-todo" }, - { "path": "./packages/hooks/hook-protocol" } + { "path": "./packages/hooks/hook-protocol" }, + { "path": "./packages/hooks/hooks-claude" }, + { "path": "./packages/hooks/hooks-codex" } ] } From 24e9c0fa70692b45a4ff27bb045ea4a3dbf9310e Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 10:45:58 +0800 Subject: [PATCH 16/47] fix(hook-protocol): discard a hookSpecificOutput block whose hookEventName mismatches the firing event MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The reference schemas key the `hookSpecificOutput` block by `hookEventName`, so a block naming a DIFFERENT event than the one firing is malformed — a hook emitting `hookSpecificOutput.hookEventName: "PreToolUse"` on a `Stop` event must not deny the Stop. The codec surfaced `hookEventName` for a bridge to compare but never enforced the discard, so both bridges pushed every parsed output into the merge unconditionally. parseHookOutput now takes an optional `expectedEventName`; when the block's `hookEventName` names a different event, its event-scoped fields (permissionDecision/permissionDecisionReason/additionalContext/updatedInput) are discarded (the discriminator is still surfaced for the log, and the event-agnostic top-level decision/continue/etc. are unaffected). runHook threads it via RunHookOptions.expectedEventName; a caller that omits it opts out. Codex review finding on the bridges PR (PR-F); fixed here on the codec that owns the fold and knows field provenance, then flows down to both bridges. --- packages/hooks/hook-protocol/README.md | 4 +- packages/hooks/hook-protocol/src/codec.ts | 37 +++++++++++--- packages/hooks/hook-protocol/src/runner.ts | 9 +++- packages/hooks/hook-protocol/src/types.ts | 9 ++-- .../hooks/hook-protocol/tests/codec.spec.ts | 48 +++++++++++++++++++ .../hooks/hook-protocol/tests/runner.spec.ts | 13 +++++ 6 files changed, 107 insertions(+), 13 deletions(-) diff --git a/packages/hooks/hook-protocol/README.md b/packages/hooks/hook-protocol/README.md index 1983cd0411..abf822ea29 100644 --- a/packages/hooks/hook-protocol/README.md +++ b/packages/hooks/hook-protocol/README.md @@ -17,8 +17,8 @@ Why a shared lib at all: Codex deliberately reimplements a *subset* of the Claud ## Primitives - **`matchesMatcher(matcher, query, mode)`** — match-all on absent/`''`/`'*'`; `claude` mode treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` mode is always an unanchored regex. An invalid regex matches nothing (never throws). -- **`runHook(bash, hook, options, now)`** — serialize `options.payload` to the hook's stdin (with a trailing newline iff `options.trailingNewline`), merge `options.env` after the executor's credential scrub (the `dsh-bash` trusted-plugin surface), honor the hook's `timeoutSec` (else `defaultTimeoutMs`), and decode the result. Never throws: an executor rejection (infra fault) becomes a `HookOutput` with `exitCode: undefined` (a non-blocking error). `now` is injected for testable durations. -- **`parseHookOutput(exitCode, stdout, stderr)`** — the exit-code + structured-stdout codec. Exit `0` → parse JSON stdout (lenient: non-JSON is left for the bridge); exit `2` → blocking error, `stderr` is the block reason (surfaced as `decision: 'block'`); other → non-blocking error. `hookSpecificOutput.permissionDecision` (allow/deny/ask) overrides a legacy top-level `decision`; `additionalContext`/`updatedInput`/`systemMessage`/`continue`/`stopReason`/`suppressOutput` are parsed too. Pure and total. +- **`runHook(bash, hook, options, now)`** — serialize `options.payload` to the hook's stdin (with a trailing newline iff `options.trailingNewline`), merge `options.env` after the executor's credential scrub (the `dsh-bash` trusted-plugin surface), honor the hook's `timeoutSec` (else `defaultTimeoutMs`), and decode the result (threading `options.expectedEventName` to the codec). Never throws: an executor rejection (infra fault) becomes a `HookOutput` with `exitCode: undefined` (a non-blocking error). `now` is injected for testable durations. +- **`parseHookOutput(exitCode, stdout, stderr, expectedEventName?)`** — the exit-code + structured-stdout codec. Exit `0` → parse JSON stdout (lenient: non-JSON is left for the bridge); exit `2` → blocking error, `stderr` is the block reason (surfaced as `decision: 'block'`); other → non-blocking error. `hookSpecificOutput.permissionDecision` (allow/deny/ask) overrides a legacy top-level `decision`; `additionalContext`/`updatedInput`/`systemMessage`/`continue`/`stopReason`/`suppressOutput` are parsed too. The schemas key the `hookSpecificOutput` block by `hookEventName`, so passing `expectedEventName` (the firing event) DISCARDS a block whose `hookEventName` names a different event — its event-scoped fields don't take effect (a `PreToolUse` block on a `Stop` hook is malformed), while the event-agnostic top-level fields still apply. Pure and total. - **`mergeHookOutputs(outputs)`** — fold the results of every hook that matched one point: permission precedence **deny > ask > allow**, halt sticky on the first `continue:false`, block reasons joined with `\n\n`, `additionalContext`/`systemMessages` accumulated in order. ## `hook/*` session events diff --git a/packages/hooks/hook-protocol/src/codec.ts b/packages/hooks/hook-protocol/src/codec.ts index ac49526600..1b246a3a14 100644 --- a/packages/hooks/hook-protocol/src/codec.ts +++ b/packages/hooks/hook-protocol/src/codec.ts @@ -64,8 +64,19 @@ function permissionDecisionOf(value: string | undefined): HookOutput['decision'] * JSON on a 0 exit is treated as "no structured output" (the plain stdout is * still on the bridge to use), matching both reference engines' lenient parse of * non-JSON stdout. + * + * `expectedEventName` is the event the hook is FIRING for (e.g. `'PreToolUse'`). + * The reference schemas key the `hookSpecificOutput` block by `hookEventName`, + * so a block whose `hookEventName` names a DIFFERENT event is malformed and its + * event-scoped fields (`permissionDecision`/`permissionDecisionReason`/ + * `additionalContext`/`updatedInput`) are DISCARDED — a `PreToolUse` block on a + * `Stop` hook must not deny the `Stop`. The block's `hookEventName` is still + * surfaced (for the log/diagnostics), and the event-agnostic top-level fields + * (`decision`/`reason`/`continue`/`stopReason`/`suppressOutput`/`systemMessage`) + * are unaffected. Omit `expectedEventName` (or pass a matching one) to apply the + * block as-is — a caller that doesn't key by event opts out of the check. */ -export function parseHookOutput(exitCode: number | undefined, stdout: string, stderr: string): HookOutput { +export function parseHookOutput(exitCode: number | undefined, stdout: string, stderr: string, expectedEventName?: string): HookOutput { const trimmedErr = stderr.trim() const trimmedOut = stdout.trim() // Keep the raw stdout verbatim: a clean-exit hook may emit PLAIN text the @@ -96,15 +107,20 @@ export function parseHookOutput(exitCode: number | undefined, stdout: string, st // reference engines are). The plain stdout remains the bridge's to use. parsed = undefined } - if (parsed) applyStructured(output, parsed) + if (parsed) applyStructured(output, parsed, expectedEventName) } } return output } -/** Fold a parsed structured-stdout object into `output` (mutates in place). */ -function applyStructured(output: HookOutput, parsed: Record): void { +/** + * Fold a parsed structured-stdout object into `output` (mutates in place). + * `expectedEventName` (the firing event) gates the per-event `hookSpecificOutput` + * block: a block whose `hookEventName` names a different event has its + * event-scoped fields discarded (only its `hookEventName` is recorded). + */ +function applyStructured(output: HookOutput, parsed: Record, expectedEventName?: string): void { const cont = bool(parsed, 'continue') if (cont !== undefined) output.continue = cont const stopReason = str(parsed, 'stopReason') @@ -121,15 +137,22 @@ function applyStructured(output: HookOutput, parsed: Record): v const topReason = str(parsed, 'reason') if (topReason !== undefined) output.reason = topReason - // hookSpecificOutput: the per-event channel, keyed by `hookEventName`. We - // surface that discriminator so the bridge can DISCARD a block whose event - // doesn't match the firing one (the schemas make it the discriminator). The + // hookSpecificOutput: the per-event channel, keyed by `hookEventName`. The // permissionDecision (allow/deny/ask) OVERRIDES the legacy top-level decision; // additionalContext and updatedInput live here too. const hso = obj(parsed.hookSpecificOutput) if (hso) { const eventName = str(hso, 'hookEventName') + // Always surface the discriminator (for the log/diagnostics), even on a + // mismatch — the record should show what the malformed block claimed. if (eventName !== undefined) output.hookEventName = eventName + // The schemas key this block by event: if it names a DIFFERENT event than the + // one firing, it is malformed — discard its event-scoped fields (a PreToolUse + // block must not deny a Stop hook). A caller that passes no expectedEventName + // opts out of the check (applies the block as-is). + if (expectedEventName !== undefined && eventName !== undefined && eventName !== expectedEventName) { + return + } const permission = permissionDecisionOf(str(hso, 'permissionDecision')) if (permission !== undefined) output.decision = permission const permissionReason = str(hso, 'permissionDecisionReason') diff --git a/packages/hooks/hook-protocol/src/runner.ts b/packages/hooks/hook-protocol/src/runner.ts index 9e26607e3d..cea09c1fe7 100644 --- a/packages/hooks/hook-protocol/src/runner.ts +++ b/packages/hooks/hook-protocol/src/runner.ts @@ -31,6 +31,13 @@ export interface RunHookOptions { defaultTimeoutMs: number /** Whether to append a trailing newline to the stdin payload (CC yes, Codex no). */ trailingNewline: boolean + /** + * The event this hook is firing for (e.g. `'PreToolUse'`). When set, a + * structured `hookSpecificOutput` block whose `hookEventName` names a DIFFERENT + * event is treated as malformed and its event-scoped fields are discarded (see + * {@link parseHookOutput}). Omit it to apply any block as-is. + */ + expectedEventName?: string } /** The {@link HookOutput} plus the wall-clock duration of the run (for `hook/result`). */ @@ -75,7 +82,7 @@ export async function runHook( // `undefined` (a non-blocking error — no clean exit code to act on). const exitCode = result.exitCode ?? undefined return { - output: parseHookOutput(exitCode, result.stdout.text, result.stderr.text), + output: parseHookOutput(exitCode, result.stdout.text, result.stderr.text, options.expectedEventName), durationMs: now() - started, } } catch (error: unknown) { diff --git a/packages/hooks/hook-protocol/src/types.ts b/packages/hooks/hook-protocol/src/types.ts index dbc4b57aab..c3b75e7c08 100644 --- a/packages/hooks/hook-protocol/src/types.ts +++ b/packages/hooks/hook-protocol/src/types.ts @@ -132,9 +132,12 @@ export interface HookOutput { reason?: string /** * The `hookSpecificOutput.hookEventName` discriminator, when the hook emitted - * a `hookSpecificOutput` block. The reference schemas key that block by event; - * a bridge compares this to the firing event and DISCARDS a mismatched block - * (a hook claiming `PreToolUse` output on a `Stop` event is malformed). Absent + * a `hookSpecificOutput` block. The reference schemas key that block by event, + * so a block whose `hookEventName` names a DIFFERENT event than the one firing + * is malformed: {@link parseHookOutput} DISCARDS its event-scoped fields when + * given the firing event's `expectedEventName` (a hook claiming `PreToolUse` + * output on a `Stop` event does not affect the `Stop`). This field is still + * surfaced even on a mismatch — the record shows what the block claimed. Absent * when the hook emitted no `hookSpecificOutput`. */ hookEventName?: string diff --git a/packages/hooks/hook-protocol/tests/codec.spec.ts b/packages/hooks/hook-protocol/tests/codec.spec.ts index 7964745056..4f37f804bb 100644 --- a/packages/hooks/hook-protocol/tests/codec.spec.ts +++ b/packages/hooks/hook-protocol/tests/codec.spec.ts @@ -93,6 +93,54 @@ describe('parseHookOutput — structured stdout (exit 0 only)', () => { expect(parseHookOutput(0, JSON.stringify({ decision: 'maybe' }), '').decision).toBeUndefined() }) + it('DISCARDS a hookSpecificOutput block whose hookEventName mismatches the firing event', () => { + // A PreToolUse block emitted on a Stop hook is malformed — its event-scoped + // fields must not take effect (a stray PreToolUse deny must not deny the Stop). + const out = parseHookOutput(0, JSON.stringify({ + hookSpecificOutput: { hookEventName: 'PreToolUse', permissionDecision: 'deny', permissionDecisionReason: 'no', additionalContext: 'x', updatedInput: { command: 'y' } }, + }), '', 'Stop') + expect(out.hookEventName).toBe('PreToolUse') // still recorded for the log + expect(out.decision).toBeUndefined() // event-scoped fields discarded + expect(out.reason).toBeUndefined() + expect(out.additionalContext).toBeUndefined() + expect(out.updatedInput).toBeUndefined() + }) + + it('APPLIES a hookSpecificOutput block whose hookEventName matches the firing event', () => { + const out = parseHookOutput(0, JSON.stringify({ + hookSpecificOutput: { hookEventName: 'PreToolUse', permissionDecision: 'deny', additionalContext: 'x' }, + }), '', 'PreToolUse') + expect(out.decision).toBe('deny') + expect(out.additionalContext).toBe('x') + }) + + it('applies the block when expectedEventName is omitted (opt-out) even if it names an event', () => { + const out = parseHookOutput(0, JSON.stringify({ + hookSpecificOutput: { hookEventName: 'PreToolUse', permissionDecision: 'deny' }, + }), '') + expect(out.decision).toBe('deny') + }) + + it('applies a block that has NO hookEventName regardless of expectedEventName', () => { + // No discriminator to mismatch — the block applies (a hook that omits the key). + const out = parseHookOutput(0, JSON.stringify({ + hookSpecificOutput: { permissionDecision: 'deny' }, + }), '', 'Stop') + expect(out.decision).toBe('deny') + }) + + it('a mismatched block does NOT discard the event-agnostic top-level decision/continue', () => { + // Only the per-event block is scoped; top-level fields are event-agnostic. + const out = parseHookOutput(0, JSON.stringify({ + decision: 'block', reason: 'top', continue: false, stopReason: 'halt', + hookSpecificOutput: { hookEventName: 'PreToolUse', permissionDecision: 'allow' }, + }), '', 'Stop') + expect(out.decision).toBe('block') // top-level survives; the allow block was discarded + expect(out.reason).toBe('top') + expect(out.continue).toBe(false) + expect(out.stopReason).toBe('halt') + }) + it('malformed JSON on a clean exit is lenient (no structured output, no throw)', () => { const out = parseHookOutput(0, '{ not valid json', '') expect(out.decision).toBeUndefined() diff --git a/packages/hooks/hook-protocol/tests/runner.spec.ts b/packages/hooks/hook-protocol/tests/runner.spec.ts index 698d6e0fa3..1cbe1b46de 100644 --- a/packages/hooks/hook-protocol/tests/runner.spec.ts +++ b/packages/hooks/hook-protocol/tests/runner.spec.ts @@ -131,4 +131,17 @@ describe('runHook — outcome decoding + duration', () => { const { output } = await runHook(bash, { command: 'h' }, { payload: {}, defaultTimeoutMs: 1000, trailingNewline: true }, clock()) expect(output.stderr).toBe('plain string fault') }) + + it('threads expectedEventName so a mismatched hookSpecificOutput block is discarded', async () => { + const { bash } = recordingBash(async () => result({ + exitCode: 0, + stdout: { text: JSON.stringify({ hookSpecificOutput: { hookEventName: 'PreToolUse', permissionDecision: 'deny' } }), truncated: false }, + })) + const { output } = await runHook(bash, { command: 'h' }, { + payload: {}, defaultTimeoutMs: 1000, trailingNewline: true, expectedEventName: 'Stop', + }, clock()) + // A PreToolUse block on a Stop hook is malformed → its decision is discarded. + expect(output.hookEventName).toBe('PreToolUse') + expect(output.decision).toBeUndefined() + }) }) From 8870da431357aea4195805ad2d9ebee2ae7953a1 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 10:48:23 +0800 Subject: [PATCH 17/47] =?UTF-8?q?fix(hooks):=20address=20Codex=20review=20?= =?UTF-8?q?=E2=80=94=20Stop=20force-continue,=20Codex=20tool=5Fname=20+=20?= =?UTF-8?q?plain-stdout=20context,=20defer=20continue:false?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Round-1 Codex review findings on the bridges: - Stop force-continue (both bridges): a blocking Stop hook with EMPTY stderr yielded decision 'deny' + reason undefined, and the `&& reason !== undefined` guard let the turn STOP — the opposite of a blocking Stop hook. Force-continue on any deny; fall back to a generic steering line when there is no reason. - Codex payload tool_name: hardcoded "Bash" disagreed with the exec.name matcher subject, so a real Codex `matcher:"Bash"` never fired against the harness's lowercase `bash` tool. Use exec.name in both payload builders (matches the matcher subject and the sibling CC bridge). Doc/RFC updated. - Codex plain-stdout context: SessionStart/UserPromptSubmit are documented to treat a clean hook's PLAIN (non-JSON) stdout as additionalContext, but nothing folded it. runPoint now folds plain stdout into context for those two events, gated on the codec's JSON gate so structured stdout is never dumped as prose. - continue:false is deferred, not honored: the seams have no hard-halt primitive yet. TODO(hook-continue-false) at both bridges + an RFC deferred note; the two tests now assert the LOG records the halt request AND that the run is NOT actually halted (no longer misleading). - README concurrency wording: hooks run SERIALLY (deliberate — adjacent invoked/result log pairs, order-independent fold), not concurrently. Fixed the CC README claim + an RFC note. Regression guards proven red on the unfixed code, then reverted. The mismatched- hookEventName discard (also flagged) is fixed in dsh-hook-protocol and merged down. --- .../feature/2026-06-30-hook-bridges.md | 7 +- packages/hooks/hooks-claude/README.md | 2 +- packages/hooks/hooks-claude/src/index.ts | 18 +++- .../hooks/hooks-claude/tests/coverage.spec.ts | 33 ++++++- packages/hooks/hooks-codex/README.md | 2 +- packages/hooks/hooks-codex/src/index.ts | 40 ++++++-- .../hooks/hooks-codex/tests/coverage.spec.ts | 92 ++++++++++++++++++- 7 files changed, 174 insertions(+), 20 deletions(-) diff --git a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md index a3e01c17be..1e782f9b67 100644 --- a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md +++ b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md @@ -15,7 +15,7 @@ The framing that shapes the whole design: **a bridge is a faithfulness adapter, Two independent plugins in the `packages/hooks/` group, each a function/namespace plugin (`name`/`inject`/`Config`/`apply`, NO default export — see [postmortem 0001](../../../postmortem/0001-acp-default-export-drops-inject.md)) injecting only `bash`: - **`dsh-hooks-claude`** — the CC dialect. Seven hook points: `SessionStart`, `UserPromptSubmit`, `PreToolUse`, `PostToolUse`, `Stop`, `SubagentStart`, `SubagentStop`. Owns CC's per-event stdin payloads (a base of `session_id`/`cwd`/`hook_event_name` plus per-event fields), CC's env + `${CLAUDE_PLUGIN_ROOT}`/`${CLAUDE_PROJECT_DIR}` substitution, and the literal-or-regex matcher mode. A CC hook's stdin carries a **trailing newline**. -- **`dsh-hooks-codex`** — the Codex dialect: a deliberate SUBSET. Five hook points (`PreToolUse`, `PostToolUse`, `SessionStart`, `UserPromptSubmit`, `Stop` — no subagent/notification/compaction), an always-regex matcher, snake_case payloads with `turn_id`/`model`/`permission_mode` extras written WITHOUT a trailing newline, no env and no `${…}` substitution, and a block-only decision model (a Codex hook can never pre-approve, so `allow`/`ask` are not honored). Codex hardcodes a tool call's `tool_name` to `"Bash"` and `tool_input` to `{ command }`. +- **`dsh-hooks-codex`** — the Codex dialect: a deliberate SUBSET. Five hook points (`PreToolUse`, `PostToolUse`, `SessionStart`, `UserPromptSubmit`, `Stop` — no subagent/notification/compaction), an always-regex matcher, snake_case payloads with `turn_id`/`model`/`permission_mode` extras written WITHOUT a trailing newline, no env and no `${…}` substitution, and a block-only decision model (a Codex hook can never pre-approve, so `allow`/`ask` are not honored). A tool call's payload carries the real `tool_name` (the value the matcher tests, so a config's tool matcher fires) in Codex's `tool_input: { command }` shape. ### Outcome → Decision mapping @@ -44,8 +44,13 @@ The config is parsed ONCE at load; a read/parse failure logs and registers nothi - **Tool-input rewrite.** A CC/Codex `updatedInput` is logged + warned, not honored — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite RFC](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)), because the pre-execution args are read by `tool/call` audit + `assistant/message` history + ACP/tool-bash presentation, so an honest rewrite is a design unit, not a field. - **Stop loop-guard** (`TODO(stop-loop-guard)`). CC/Codex break an infinite force-continue with `stop_hook_active` (true once a Stop hook fired this run) plus a max-consecutive cap; both are deferred. Today `stop_hook_active` is always `false`, so a Stop hook that unconditionally blocks would force-continue every step — a hook author must self-limit until the guard lands. - **Permission `ask`** degrades to `deny` at the `tools/pre-execute` seam (`FIXME(permissions)` in the interception-seams RFC) — there is no interactive permission prompt yet. +- **Hook `continue:false` (hard halt).** A hook can ask to halt the whole run (CC/Codex `continue:false`); the shared merge folds it into `MergedHookOutcome.stop`/`stopReason`, but no bridge acts on it (`TODO(hook-continue-false)`) — the interception seams have no "hard-halt the agent" primitive yet (a Decision blocks/steers a single point, not the run). Deferred with the loop-guard work; the halt request is recorded in the `hook/result` log, and the hook keeps its per-point effect (decision/context) meanwhile. - **Config discovery.** The path is explicit in `cordis.yml`; the full multi-layer CC/Codex precedence walk and the trust/hash model are not reimplemented (`TODO`). +### Multiple hooks on one point run serially, not concurrently + +The reference engines run a point's matched hooks concurrently and fold the results. These bridges run them **serially** (`await` per hook inside the match loop) and fold with the same most-restrictive merge. Serial is deliberate: it keeps each hook's `hook/invoked`/`hook/result` pair adjacent and in a deterministic order in the session log, and the fold is order-independent for the decision (`deny > ask > allow`) so the outcome matches. The cost is latency (hook *N* waits for hook *N−1*) and that per-hook timeouts are not overlapped — acceptable for the hook counts real configs use; revisit if a config ever fans out enough for the wall-clock to matter. + ## Consequences The bridges are thin and readable standalone: the correctness-critical halves (matcher semantics, exit-code contract, merge precedence) live in the shared `dsh-hook-protocol`, so each bridge is just config-parse + payload-build + outcome-map. Each is covered at per-file 100% — config-parse branches as unit tests, and the seam mappings end-to-end through the REAL loop + REAL `dsh-bash-local` + REAL shell scripts from a temp `hooks.json` (a scripted mock MODEL is the only stand-in), plus a real-Loader export-shape guard so a stray default export can't silently drop `inject`. Because the seams already carry typed Decisions, a future native plugin needs none of this bridge machinery — it returns a Decision directly. diff --git a/packages/hooks/hooks-claude/README.md b/packages/hooks/hooks-claude/README.md index 02cdfc9894..126573c6be 100644 --- a/packages/hooks/hooks-claude/README.md +++ b/packages/hooks/hooks-claude/README.md @@ -39,7 +39,7 @@ The config is parsed **once** at load. A read/parse failure is contained — the | `SubagentStart` | `subagent/start` (emit) | additionalContext → `agent.inject()` into the live child | | `SubagentStop` | `subagent/end` (emit) | observe-only | -The matcher subject is the tool name (`PreToolUse`/`PostToolUse`), the session source (`SessionStart`), or the child's agent type (`SubagentStart`/`SubagentStop`); `UserPromptSubmit`/`Stop` ignore matchers. Multiple file-configured hooks on one point run concurrently and fold most-restrictively (`deny > ask > allow`, see `dsh-hook-protocol`). +The matcher subject is the tool name (`PreToolUse`/`PostToolUse`), the session source (`SessionStart`), or the child's agent type (`SubagentStart`/`SubagentStop`); `UserPromptSubmit`/`Stop` ignore matchers. Multiple file-configured hooks on one point run **serially, in config order**, and fold most-restrictively (`deny > ask > allow`, see `dsh-hook-protocol`); serial keeps each hook's `hook/invoked`/`hook/result` pair adjacent in the log, and the fold is order-independent for the decision (see the RFC's "run serially, not concurrently" note). ## Context source diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts index 5e8478e2b7..7e37f1fba0 100644 --- a/packages/hooks/hooks-claude/src/index.ts +++ b/packages/hooks/hooks-claude/src/index.ts @@ -161,6 +161,14 @@ export function apply(ctx: Context, config: Config): void { return mergeHookOutputs(outputs) } + // TODO(hook-continue-false): the merge computes `merged.stop`/`stopReason` from + // a hook's `continue:false`, but no seam below honors it — there is no + // "hard-halt the whole agent" primitive on the interception seams yet (a + // Decision can block/deny/steer a single point, not stop the run). Honoring it + // needs that primitive; deferred with the loop-guard work. Until then a + // `continue:false` hook still has its per-point effect (its decision/context), + // and the halt request is recorded in the `hook/result` log but not acted on. + /** Build a HookContext from accumulated additionalContext strings, or undefined when none. */ function contextFrom(merged: MergedHookOutcome): HookContext | undefined { if (merged.additionalContext.length === 0) return undefined @@ -224,9 +232,13 @@ export function apply(ctx: Context, config: Config): void { // step — a hook author must self-limit until the guard lands. --- ctx.on('agent/turn-continuation', async (agent, turn, _default, next): Promise => { const merged = await runPoint('Stop', '', stopPayload(agent), { agent, turn }) - if (merged.decision === 'deny' && merged.reason !== undefined) { - // A blocking Stop hook forces continuation, feeding its reason as next-step steering. - return { action: 'continue', reason: { content: [{ type: 'text', text: merged.reason }], source: PLUGIN_SOURCE } } + if (merged.decision === 'deny') { + // A blocking Stop hook forces continuation. It carries its reason as + // next-step steering; a blocking hook that emitted no reason (exit 2, empty + // stderr) still forces the turn to continue — the block is what matters, so + // fall back to a generic steering line rather than letting the turn stop. + const text = merged.reason ?? 'continue: blocked by Stop hook' + return { action: 'continue', reason: { content: [{ type: 'text', text }], source: PLUGIN_SOURCE } } } return next() }) diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts index 29dda6b850..9b48e6d645 100644 --- a/packages/hooks/hooks-claude/tests/coverage.spec.ts +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -148,6 +148,25 @@ describe('hooks-claude coverage — Stop continuation + subagent inject/catch', expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('continue please') }) + it('a Stop hook that blocks with EMPTY stderr still forces continuation (no reason required)', async () => { + // Regression: a blocking Stop hook (exit 2) with no stderr yields decision + // 'deny' + reason undefined; the turn must STILL force-continue (the block is + // what matters), not silently stop. Self-limit to one block so it can't loop. + const d = dir() + const marker = join(d, 'fired') + const s = sh(d, 'stop.sh', `#!/usr/bin/env bash\nif [ -e "${marker}" ]; then exit 0; fi\ntouch "${marker}"\nexit 2\n`) + const path = hooks(d, { Stop: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('one'), textResponse('two')]) + const ctx = await harness(path, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + // A second model request ran → the empty-reason block forced continuation. + expect(adapter.requests).toHaveLength(2) + // The steering carried the fallback reason (no stderr to use). + expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('blocked by Stop hook') + }) + it('SubagentStart additionalContext is injected into a REGISTERED live child', async () => { const d = dir() const s = sh(d, 'sa.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SubagentStart","additionalContext":"child guidance"}}\'\n') @@ -329,18 +348,26 @@ describe('hooks-claude coverage — schema-bypass default + unspawnable hook', ( }) describe('hooks-claude coverage — continue:false, context arm, no-cwd', () => { - it('a hook with {"continue":false} and no decision records decision "stop"', async () => { + it('a {"continue":false} hook is RECORDED as decision "stop" but does not halt the run (TODO(hook-continue-false))', async () => { + // Honoring `continue:false` (hard-halt the whole run) is deferred — there is + // no such primitive on the interception seams yet. So this asserts the LOG + // faithfully records the halt request (decision "stop"), AND that the run is + // NOT actually halted: the tool still runs and the turn completes normally. const d = dir() const s = sh(d, 'stop.sh', '#!/usr/bin/env bash\necho \'{"continue":false,"stopReason":"halt"}\'\n') const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) const ctx = await harness(path, adapter) - ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + let ran = false + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) agent.send([{ type: 'text', text: 'go' }]) await waitForIdle(ctx, agent) const res = events(agent).find(e => e.type === 'hook/result') - expect(res?.type === 'hook/result' && res.data.decision).toBe('stop') + expect(res?.type === 'hook/result' && res.data.decision).toBe('stop') // recorded + expect(ran).toBe(true) // NOT honored: the tool still ran (halt is deferred) + const turnEnd = events(agent).findLast(e => e.type === 'turn/end') + expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason.kind).toBe('completed') // ran to completion }) it('a PostToolUse hook that BOTH blocks AND attaches additionalContext', async () => { diff --git a/packages/hooks/hooks-codex/README.md b/packages/hooks/hooks-codex/README.md index 39d4fcd5ca..e20b3a211d 100644 --- a/packages/hooks/hooks-codex/README.md +++ b/packages/hooks/hooks-codex/README.md @@ -43,7 +43,7 @@ The config is parsed **once** at load; a read/parse failure is contained (logs + | `PostToolUse` | `tools/post-execute` (waterfall) | `block` → `block` with feedback; additionalContext → `accept` with context | | `Stop` | `agent/turn-continuation` (waterfall) | a blocking Stop hook forces `continue` with the reason as next-step steering | -Codex hardcodes a tool call's `tool_name` to `"Bash"` and `tool_input` to `{ command }` (extracted from the call's arguments, or `''` when absent). The matcher subject is the tool name (`PreToolUse`/`PostToolUse`) or the session source (`SessionStart`); `UserPromptSubmit`/`Stop` ignore matchers. +A tool call's payload carries the real `tool_name` (the same value the matcher tests) and Codex's `tool_input: { command }` shape (the `command` arg when present, else `''`). The matcher subject is the tool name (`PreToolUse`/`PostToolUse`) or the session source (`SessionStart`); `UserPromptSubmit`/`Stop` ignore matchers. ## Context source diff --git a/packages/hooks/hooks-codex/src/index.ts b/packages/hooks/hooks-codex/src/index.ts index 127511389d..b61e60bdfb 100644 --- a/packages/hooks/hooks-codex/src/index.ts +++ b/packages/hooks/hooks-codex/src/index.ts @@ -86,7 +86,7 @@ export function apply(ctx: Context, config: Config): void { point: string, matchQuery: string, payload: unknown, - opts: { agent?: Agent; turn?: number; signal?: AbortSignal }, + opts: { agent?: Agent; turn?: number; signal?: AbortSignal; plainStdoutAsContext?: boolean }, ): Promise { const groups: MatcherGroup[] = parsed[point] ?? [] const outputs: HookOutput[] = [] @@ -108,6 +108,17 @@ export function apply(ctx: Context, config: Config): void { defaultTimeoutMs, trailingNewline: false, // Codex writes stdin WITHOUT a trailing newline. }, () => performance.now()) + // Codex's SessionStart/UserPromptSubmit treat a clean hook's PLAIN + // (non-JSON) stdout as additionalContext. The codec keeps that raw text on + // `output.stdout` but only sets `additionalContext` from a JSON + // `hookSpecificOutput`, so fold plain stdout in here and let the shared + // merge + contextFrom path carry it. Guarded on the codec's own JSON gate + // (stdout starting with `{`) so a structured hook's raw JSON is never + // injected as prose, and it never clobbers an explicit additionalContext. + if (opts.plainStdoutAsContext === true && output.additionalContext === undefined + && output.stdout.length > 0 && !output.stdout.startsWith('{')) { + output.additionalContext = output.stdout + } outputs.push(output) if (session && opts.turn !== undefined) { const stderrSummary = summarize(output.stderr) @@ -124,6 +135,12 @@ export function apply(ctx: Context, config: Config): void { return mergeHookOutputs(outputs) } + // TODO(hook-continue-false): the merge computes `merged.stop`/`stopReason` from + // a hook's `continue:false`, but no seam below honors it — there is no + // "hard-halt the whole agent" primitive on the interception seams yet. Deferred + // with the loop-guard work; until then a `continue:false` hook keeps its + // per-point effect and the halt request is recorded in `hook/result`, not acted on. + function contextFrom(merged: MergedHookOutcome): HookContext | undefined { if (merged.additionalContext.length === 0) return undefined const content: ContentBlock[] = merged.additionalContext.map(text => ({ type: 'text', text })) @@ -132,7 +149,7 @@ export function apply(ctx: Context, config: Config): void { // SessionStart: emit. Codex passes a plain-stdout hook's output as additionalContext. ctx.on('agent/session-start', (agent, source) => { - void runPoint('SessionStart', source, { ...base(agent, 'SessionStart', model), source }, { agent }) + void runPoint('SessionStart', source, { ...base(agent, 'SessionStart', model), source }, { agent, plainStdoutAsContext: true }) .then((merged) => { const context = contextFrom(merged) if (context) agent.inject(context.content, { source: context.source }) @@ -143,7 +160,7 @@ export function apply(ctx: Context, config: Config): void { // UserPromptSubmit → PromptDecision. Codex can only BLOCK (no allow/ask). ctx.on('agent/prompt-submit', async (agent, content, _source, next): Promise => { const turn = lastTurn(agent) - const merged = await runPoint('UserPromptSubmit', '', { ...turnBase(agent, 'UserPromptSubmit', model), prompt: blocksToText(content) }, { agent, turn }) + const merged = await runPoint('UserPromptSubmit', '', { ...turnBase(agent, 'UserPromptSubmit', model), prompt: blocksToText(content) }, { agent, turn, plainStdoutAsContext: true }) if (merged.decision === 'deny') return { kind: 'block', reason: merged.reason ?? 'blocked by UserPromptSubmit hook' } const context = contextFrom(merged) if (context) return { kind: 'allow', additionalContext: context } @@ -176,8 +193,12 @@ export function apply(ctx: Context, config: Config): void { // loop-guard (stop_hook_active + a max-consecutive cap) is deferred. ctx.on('agent/turn-continuation', async (agent, turn, _default, next): Promise => { const merged = await runPoint('Stop', '', { ...turnBase(agent, 'Stop', model), stop_hook_active: false, last_assistant_message: null }, { agent, turn }) - if (merged.decision === 'deny' && merged.reason !== undefined) { - return { action: 'continue', reason: { content: [{ type: 'text', text: merged.reason }], source: PLUGIN_SOURCE } } + if (merged.decision === 'deny') { + // A blocking Stop hook forces continuation; a block with no reason (exit 2, + // empty stderr) still forces it — fall back to a generic steering line + // rather than letting the turn stop. + const text = merged.reason ?? 'continue: blocked by Stop hook' + return { action: 'continue', reason: { content: [{ type: 'text', text }], source: PLUGIN_SOURCE } } } return next() }) @@ -226,10 +247,13 @@ function commandOf(args: unknown): string { } function preToolPayload(exec: ToolExecution, model: string): Record { - // Codex hardcodes tool_name to "Bash" and tool_input to { command }. - return { ...turnBase(exec.agent, 'PreToolUse', model), tool_name: 'Bash', tool_input: { command: commandOf(exec.arguments) }, tool_use_id: exec.callId } + // `tool_name` is the REAL tool name (matching the `exec.name` matcher subject); + // a hardcoded constant would disagree with what the matcher tests and make a + // config's tool matcher never fire. `tool_input` keeps Codex's `{ command }` + // shape (its shell payload), derived from the call's `command` arg when present. + return { ...turnBase(exec.agent, 'PreToolUse', model), tool_name: exec.name, tool_input: { command: commandOf(exec.arguments) }, tool_use_id: exec.callId } } function postToolPayload(exec: ToolExecution, result: ToolExecutionResult, model: string): Record { - return { ...turnBase(exec.agent, 'PostToolUse', model), tool_name: 'Bash', tool_input: { command: commandOf(exec.arguments) }, tool_use_id: exec.callId, tool_response: blocksToText(result.content) } + return { ...turnBase(exec.agent, 'PostToolUse', model), tool_name: exec.name, tool_input: { command: commandOf(exec.arguments) }, tool_use_id: exec.callId, tool_response: blocksToText(result.content) } } diff --git a/packages/hooks/hooks-codex/tests/coverage.spec.ts b/packages/hooks/hooks-codex/tests/coverage.spec.ts index 732e0a7c61..d10f2d7df1 100644 --- a/packages/hooks/hooks-codex/tests/coverage.spec.ts +++ b/packages/hooks/hooks-codex/tests/coverage.spec.ts @@ -217,16 +217,21 @@ describe('hooks-codex coverage — decision mapping paths', () => { expect(events(agent).some(e => e.type === 'hook/invoked')).toBe(false) }) - it('a {"continue":false} hook with no decision records decision "stop"', async () => { + it('a {"continue":false} hook is RECORDED as "stop" but does not halt the run (TODO(hook-continue-false))', async () => { + // Honoring `continue:false` is deferred — the seams have no hard-halt + // primitive. Assert the LOG records the halt request AND that the run is not + // actually halted (the tool still runs, the turn completes). const d = dir() hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', '#!/usr/bin/env bash\necho \'{"continue":false,"stopReason":"halt"}\'\n') }] }] }) const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) const ctx = await harness(join(d, 'hooks.json'), adapter) - ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + let ran = false + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) const res = events(agent).find(e => e.type === 'hook/result') - expect(res?.type === 'hook/result' && res.data.decision).toBe('stop') + expect(res?.type === 'hook/result' && res.data.decision).toBe('stop') // recorded + expect(ran).toBe(true) // NOT honored: the tool still ran (halt is deferred) }) it('PreToolUse deny with EMPTY stderr uses the default reason (?? right arm)', async () => { @@ -305,4 +310,85 @@ describe('hooks-codex coverage — decision mapping paths', () => { const res = events(agent).find(e => e.type === 'hook/result') expect(res?.type === 'hook/result' && 'exitCode' in res.data).toBe(false) }) + + it('a blocking Stop hook with EMPTY stderr still forces continuation (no reason required)', async () => { + // Regression: an exit-2 Stop hook with no stderr yields decision 'deny' + + // reason undefined; the turn must STILL force-continue, not silently stop. + const d = dir() + const marker = join(d, 'fired') + hooks(d, { Stop: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', `#!/usr/bin/env bash\nif [ -e "${marker}" ]; then exit 0; fi\ntouch "${marker}"\nexit 2\n`) }] }] }) + const adapter = new MockAdapter([textResponse('one'), textResponse('two')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(2) // empty-reason block forced continuation + expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('blocked by Stop hook') + }) + + it('a clean UserPromptSubmit hook that prints PLAIN stdout injects it as context', async () => { + // Codex feeds a SessionStart/UserPromptSubmit hook's PLAIN (non-JSON) stdout + // as additionalContext (unlike CC, which needs a JSON hookSpecificOutput). + const d = dir() + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'ctx.sh', '#!/usr/bin/env bash\necho "extra guidance from a plain hook"\nexit 0\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('extra guidance from a plain hook') + }) + + it('a clean SessionStart hook that prints PLAIN stdout injects it (not JSON)', async () => { + const d = dir() + hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 'ss.sh', '#!/usr/bin/env bash\necho "session preamble"\nexit 0\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + await new Promise(r => setTimeout(r, 60)) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('session preamble') + }) + + it('a clean hook that prints JSON is NOT injected as prose (plain-stdout gate)', async () => { + // A structured (JSON) stdout must go through the hookSpecificOutput path, not + // be dumped verbatim as context — the `!startsWith('{')` gate guards this. + const d = dir() + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'j.sh', '#!/usr/bin/env bash\necho \'{"unrelated":"json"}\'\nexit 0\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(JSON.stringify(adapter.requests[0]!.messages)).not.toContain('unrelated') + }) + + it('the PreToolUse payload carries the REAL tool name (matches the matcher subject)', async () => { + // Regression: the payload once hardcoded tool_name "Bash", disagreeing with + // the exec.name matcher subject — a config matcher on the real name would + // then never fire. Capture the payload and assert tool_name === the real name. + const d = dir() + const cap = join(d, 'payload') + hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'cap.sh', `#!/usr/bin/env bash\ncat > "${cap}"\nexit 0\n`) }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'shell', { command: 'ls' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'shell', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const payload = JSON.parse(readFileSync(cap, 'utf8')) as { tool_name: string; tool_input: { command: string } } + expect(payload.tool_name).toBe('shell') + expect(payload.tool_input.command).toBe('ls') + }) + + it('a Codex matcher on the REAL tool name fires (matcher subject === payload tool_name)', async () => { + // A regex matcher matching the real tool name must select the hook — proving + // the matcher subject and the payload tool_name agree. + const d = dir() + hooks(d, { PreToolUse: [{ matcher: 'shell', hooks: [{ type: 'command', command: sh(d, 'd.sh', '#!/usr/bin/env bash\nexit 2\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'shell', { command: 'ls' }), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'shell', description: 'b', parameters: { command: { type: 'string' } }, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(ran).toBe(false) // the matcher fired → the hook denied the tool + expect(events(agent).some(e => e.type === 'hook/invoked' && e.data.point === 'PreToolUse')).toBe(true) + }) }) From 253eded47b75515d3fdab785d7b76e8c573d118f Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 10:56:34 +0800 Subject: [PATCH 18/47] fix(hooks): pass expectedEventName so a mismatched hookSpecificOutput block is discarded Wire the bridges to the codec's new discriminator check (merged down from dsh-hook-protocol): each bridge passes its firing `point` as `expectedEventName` to runHook, so a hook whose `hookSpecificOutput.hookEventName` names a different event has its event-scoped fields discarded. Bridge-level guard test: a PreToolUse hook emitting a UserPromptSubmit-labeled deny no longer denies the tool (proven red without the wiring, then reverted). --- packages/hooks/hooks-claude/src/index.ts | 3 +++ .../hooks/hooks-claude/tests/coverage.spec.ts | 16 ++++++++++++++++ packages/hooks/hooks-codex/src/index.ts | 2 ++ 3 files changed, 21 insertions(+) diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts index 7e37f1fba0..74b1e6f5c0 100644 --- a/packages/hooks/hooks-claude/src/index.ts +++ b/packages/hooks/hooks-claude/src/index.ts @@ -141,6 +141,9 @@ export function apply(ctx: Context, config: Config): void { ...opts.signal ? { signal: opts.signal } : {}, defaultTimeoutMs, trailingNewline: true, + // Discard a `hookSpecificOutput` block whose `hookEventName` names a + // different event than the one firing (the schemas key it by event). + expectedEventName: point, }, () => performance.now()) outputs.push(output) if (output.updatedInput !== undefined) { diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts index 9b48e6d645..fb8b11e739 100644 --- a/packages/hooks/hooks-claude/tests/coverage.spec.ts +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -387,6 +387,22 @@ describe('hooks-claude coverage — continue:false, context arm, no-cwd', () => expect(events(agent).some(e => e.type === 'context/message' && e.data.content.some(b => b.type === 'text' && b.text.includes('context too')))).toBe(true) }) + it('a PreToolUse hook whose hookSpecificOutput names a DIFFERENT event does NOT deny the tool', async () => { + // The block's hookEventName (UserPromptSubmit) mismatches the firing event + // (PreToolUse), so its permissionDecision:"deny" is discarded — the tool runs. + const d = dir() + const s = sh(d, 'x.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","permissionDecision":"deny"}}\'\n') + const path = hooks(d, { PreToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + let ran = false + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { ran = true; return [{ type: 'text', text: 'ok' }] } })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(ran).toBe(true) // the mismatched deny was discarded → the tool ran + }) + }) describe('hooks-claude coverage — executor reject + no-open-turn', () => { diff --git a/packages/hooks/hooks-codex/src/index.ts b/packages/hooks/hooks-codex/src/index.ts index b61e60bdfb..e3e2ac020b 100644 --- a/packages/hooks/hooks-codex/src/index.ts +++ b/packages/hooks/hooks-codex/src/index.ts @@ -107,6 +107,8 @@ export function apply(ctx: Context, config: Config): void { ...opts.signal ? { signal: opts.signal } : {}, defaultTimeoutMs, trailingNewline: false, // Codex writes stdin WITHOUT a trailing newline. + // Discard a `hookSpecificOutput` block naming a different event. + expectedEventName: point, }, () => performance.now()) // Codex's SessionStart/UserPromptSubmit treat a clean hook's PLAIN // (non-JSON) stdout as additionalContext. The codec keeps that raw text on From a72ebda723781ad714320a9ddf85a35c59fac207 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 11:25:54 +0800 Subject: [PATCH 19/47] test(hooks): poll for detached-hook effects instead of a fixed sleep (flake fix) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The bridge tests that drive observe-only emit listeners (session-start, subagent/start, subagent/end) fire their hook on a detached `.then` the test cannot await. They waited a fixed 50-80ms, which flaked under the full test:coverage run's heavy parallel load (transform ~400s): the sleep expired before the async hook completed, so the injected context / marker file / warn call had not landed. Replace each fixed sleep with a `waitFor(predicate)` poll that retries until the observable effect appears (5s deadline) — "async state is not synchronous state": wait for the signal that actually fires, not a guessed duration. No behavior change; the same assertions, made robust to scheduling. --- .../hooks/hooks-claude/tests/bridge.spec.ts | 26 ++++++++++++++++--- .../hooks/hooks-claude/tests/coverage.spec.ts | 18 +++++++++---- .../hooks/hooks-codex/tests/coverage.spec.ts | 21 +++++++++++---- 3 files changed, 51 insertions(+), 14 deletions(-) diff --git a/packages/hooks/hooks-claude/tests/bridge.spec.ts b/packages/hooks/hooks-claude/tests/bridge.spec.ts index 73cd66df10..0cc4458f52 100644 --- a/packages/hooks/hooks-claude/tests/bridge.spec.ts +++ b/packages/hooks/hooks-claude/tests/bridge.spec.ts @@ -64,6 +64,20 @@ function events(agent: ReactLoopAgent): SessionEvent[] { return [...agent.session.events] } +/** + * Poll `predicate` until it returns true or the deadline passes. Detached + * emit-listener hooks (session-start, subagent) fire on a `.then` the test can't + * await directly; polling for the observable EFFECT is robust under load, where a + * single fixed sleep flakes ("async state is not synchronous state"). + */ +async function waitFor(predicate: () => boolean, timeout = 5000, interval = 10): Promise { + const deadline = Date.now() + timeout + while (!predicate()) { + if (Date.now() > deadline) throw new Error('waitFor: condition not met before deadline') + await new Promise(r => setTimeout(r, interval)) + } +} + describe('hooks-claude bridge — UserPromptSubmit', () => { it('a UserPromptSubmit hook that exits 2 blocks the prompt (rejected turn)', async () => { // The UserPromptSubmit hook exits 2 (blocking) with a reason on stderr. @@ -239,8 +253,11 @@ describe('hooks-claude bridge — SessionStart', () => { const adapter = new MockAdapter([textResponse('ok')]) const ctx = await harness(dir, adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - // session-start fires async; wait a tick for the inject before sending. - await new Promise(r => setTimeout(r, 50)) + // session-start fires async (detached .then → agent.inject); wait for the + // injected context/message to actually land before sending, rather than a + // fixed sleep that flakes under load. + await waitFor(() => events(agent).some(e => e.type === 'context/message' + && e.data.content.some(b => b.type === 'text' && b.text.includes('project uses tabs')))) agent.send([{ type: 'text', text: 'go' }]) await waitForIdle(ctx, agent) @@ -274,10 +291,11 @@ describe('hooks-claude bridge — SubagentStart / SubagentStop (observe)', () => // child lookup yields undefined and it simply runs the hook. ctx.emit('subagent/start', { provider: 'inproc', id: AgentId('child-1'), agentType: 'researcher' }) ctx.emit('subagent/end', { provider: 'inproc', id: AgentId('child-1'), agentType: 'researcher', stopReason: 'completed', lastAssistantMessage: [{ type: 'text', text: 'done' }] }) - // Both hooks run async (detached .then); let them settle. - await new Promise(r => setTimeout(r, 80)) + // Both hooks run async (detached .then); poll for their marker files rather + // than a fixed sleep that flakes under load. const { existsSync } = await import('node:fs') + await waitFor(() => existsSync(startMarker) && existsSync(stopMarker)) expect(existsSync(startMarker)).toBe(true) expect(existsSync(stopMarker)).toBe(true) }) diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts index fb8b11e739..ca3a143deb 100644 --- a/packages/hooks/hooks-claude/tests/coverage.spec.ts +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -45,6 +45,15 @@ function waitForIdle(ctx: Context, agent: ReactLoopAgent): Promise { return new Promise((resolve) => { const d = ctx.on('agent/status', (s, st) => { if (s === agent && st === 'idle') { d(); resolve() } }) }) } function events(agent: ReactLoopAgent): SessionEvent[] { return [...agent.session.events] } +/** Poll until `predicate` holds or the deadline passes — robust to detached + * emit-listener hooks firing on a `.then` (a fixed sleep flakes under load). */ +async function waitFor(predicate: () => boolean, timeout = 5000, interval = 10): Promise { + const deadline = Date.now() + timeout + while (!predicate()) { + if (Date.now() > deadline) throw new Error('waitFor: condition not met before deadline') + await new Promise(r => setTimeout(r, interval)) + } +} describe('hooks-claude coverage — config option arms + substitution + skip warning', () => { it('honors pluginRoot + projectDir substitution and warns on a skipped non-command hook', async () => { @@ -177,7 +186,7 @@ describe('hooks-claude coverage — Stop continuation + subagent inject/catch', const child = { id: AgentId('child-x'), inject: (content: { type: string; text?: string }[]) => { injected.push(content.map(b => b.text ?? '').join('')) }, session: { header: { id: 'child-x' } } } as unknown as Parameters[0] ctx.agents.register(child) ctx.emit('subagent/start', { provider: 'p', id: AgentId('child-x'), agentType: 'r' }) - await new Promise(r => setTimeout(r, 80)) + await waitFor(() => injected.includes('child guidance')) expect(injected).toContain('child guidance') }) @@ -193,7 +202,7 @@ describe('hooks-claude coverage — Stop continuation + subagent inject/catch', const child = { id: AgentId('child-y'), inject: () => { throw new Error('inject boom') }, session: { header: { id: 'child-y' } } } as unknown as Parameters[0] ctx.agents.register(child) ctx.emit('subagent/start', { provider: 'p', id: AgentId('child-y') }) - await new Promise(r => setTimeout(r, 80)) + await waitFor(() => warn.mock.calls.some(c => String(c[0]).includes('SubagentStart hook failed'))) expect(warn).toHaveBeenCalledWith(expect.stringContaining('SubagentStart hook failed')) }) }) @@ -238,7 +247,7 @@ describe('hooks-claude coverage — default reasons + sparse payloads', () => { const path = hooks(d, { SubagentStop: [{ hooks: [{ type: 'command', command: s }] }] }) const ctx = await harness(path, new MockAdapter([])) ctx.emit('subagent/end', { provider: 'p', id: AgentId('child-z'), stopReason: 'completed' }) // no agentType - await new Promise(r => setTimeout(r, 80)) + await waitFor(() => existsSync(marker)) expect(existsSync(marker)).toBe(true) }) }) @@ -307,7 +316,6 @@ describe('hooks-claude coverage — schema-bypass default + unspawnable hook', ( // Direct apply with only configPath — bypasses schemastery's defaults, so the // runtime `defaultTimeoutMs ?? 600_000` fallback is exercised. HooksClaude.apply(ctx, { configPath: join(d, 'hooks.json') }) - await new Promise(r => setTimeout(r, 10)) ctx.llm.registerAdapter(['mock'], adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) agent.send([{ type: 'text', text: 'go' }]) @@ -438,7 +446,7 @@ describe('hooks-claude coverage — detached-listener catch handlers', () => { const original = agent.inject.bind(agent) let threw = false agent.inject = (() => { threw = true; throw new Error('inject boom') }) - await new Promise(r => setTimeout(r, 80)) + await waitFor(() => threw) expect(threw).toBe(true) agent.inject = original agent.send([{ type: 'text', text: 'go' }]) diff --git a/packages/hooks/hooks-codex/tests/coverage.spec.ts b/packages/hooks/hooks-codex/tests/coverage.spec.ts index d10f2d7df1..c32d0b3b91 100644 --- a/packages/hooks/hooks-codex/tests/coverage.spec.ts +++ b/packages/hooks/hooks-codex/tests/coverage.spec.ts @@ -36,6 +36,15 @@ function waitForIdle(ctx: Context, agent: ReactLoopAgent): Promise { return new Promise((resolve) => { const d = ctx.on('agent/status', (s, st) => { if (s === agent && st === 'idle') { d(); resolve() } }) }) } function events(agent: ReactLoopAgent): SessionEvent[] { return [...agent.session.events] } +/** Poll until `predicate` holds or the deadline passes — robust to detached + * emit-listener hooks firing on a `.then` (a fixed sleep flakes under load). */ +async function waitFor(predicate: () => boolean, timeout = 5000, interval = 10): Promise { + const deadline = Date.now() + timeout + while (!predicate()) { + if (Date.now() > deadline) throw new Error('waitFor: condition not met before deadline') + await new Promise(r => setTimeout(r, interval)) + } +} describe('hooks-codex coverage — decision mapping paths', () => { it('UserPromptSubmit block (exit 2) → rejected turn; default reason on empty stderr', async () => { @@ -66,7 +75,8 @@ describe('hooks-codex coverage — decision mapping paths', () => { const adapter = new MockAdapter([textResponse('ok')]) const ctx = await harness(join(d, 'hooks.json'), adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - await new Promise(r => setTimeout(r, 60)) + await waitFor(() => events(agent).some(e => e.type === 'context/message' + && e.data.content.some(b => b.type === 'text' && b.text.includes('start-ctx')))) agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('start-ctx') }) @@ -148,7 +158,6 @@ describe('hooks-codex coverage — decision mapping paths', () => { ctx.logger.warn = warn as never // Direct apply (schema bypass) → defaultTimeoutMs ?? 600_000 + model ?? '' fallbacks. HooksCodex.apply(ctx, { configPath: join(d, 'hooks.json') }) - await new Promise(r => setTimeout(r, 10)) ctx.llm.registerAdapter(['mock'], adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) @@ -174,7 +183,8 @@ describe('hooks-codex coverage — decision mapping paths', () => { const adapter = new MockAdapter([textResponse('ok')]) const ctx = await harness(join(d, 'hooks.json'), adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - await new Promise(r => setTimeout(r, 60)) + // A completed turn proves session-start already ran; the clean no-output hook + // injected nothing, so no context/message exists. agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) expect(events(agent).some(e => e.type === 'context/message')).toBe(false) }) @@ -187,7 +197,7 @@ describe('hooks-codex coverage — decision mapping paths', () => { const warn = vi.fn(); ctx.logger.warn = warn as never const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) agent.inject = (() => { throw new Error('inject boom') }) - await new Promise(r => setTimeout(r, 60)) + await waitFor(() => warn.mock.calls.some(c => String(c[0]).includes('SessionStart hook failed'))) expect(warn).toHaveBeenCalledWith(expect.stringContaining('SessionStart hook failed')) }) @@ -343,7 +353,8 @@ describe('hooks-codex coverage — decision mapping paths', () => { const adapter = new MockAdapter([textResponse('ok')]) const ctx = await harness(join(d, 'hooks.json'), adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - await new Promise(r => setTimeout(r, 60)) + await waitFor(() => events(agent).some(e => e.type === 'context/message' + && e.data.content.some(b => b.type === 'text' && b.text.includes('session preamble')))) agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('session preamble') }) From 4da2b99bc32b0f884855a5fd14bb8b10de2177c5 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 12:03:23 +0800 Subject: [PATCH 20/47] =?UTF-8?q?fix(hooks-codex):=20gate=20plain-stdout?= =?UTF-8?q?=E2=86=92context=20on=20a=20clean=20exit;=20harden=20HMR=20+=20?= =?UTF-8?q?absence=20tests?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Round-2 Codex review of the round-1 fixes: - (A) The Codex plain-stdout→additionalContext fold (F1) was not gated on exit code, so a NON-clean hook's stdout still injected: a SessionStart `echo stale; exit 2` (an emit — cannot block) wrongly injected "stale", and a UserPromptSubmit `exit 1` (non-blocking error → falls through to context) did too. Gate the fold on `output.exitCode === 0`, matching the codec's own structured-stdout rule. Guard tests for both paths, proven red without the gate. - (B) The Codex "SessionStart no-context no-op" absence test was unsound (a completed turn doesn't prove the detached hook finished). It now touches a marker and waitFor()s it before asserting no context. - (B) Both HMR tests used a no-op `true` hook, so a leaked listener would still pass. They now use a BLOCKING (exit 2) UserPromptSubmit hook and assert the post-dispose turn is NOT blocked and logs no hook/invoked — a leaked listener fails loudly. --- .../hooks/hooks-claude/tests/bridge.spec.ts | 22 +++++++--- packages/hooks/hooks-codex/src/index.ts | 14 ++++--- .../hooks/hooks-codex/tests/bridge.spec.ts | 12 ++++-- .../hooks/hooks-codex/tests/coverage.spec.ts | 40 +++++++++++++++++-- 4 files changed, 72 insertions(+), 16 deletions(-) diff --git a/packages/hooks/hooks-claude/tests/bridge.spec.ts b/packages/hooks/hooks-claude/tests/bridge.spec.ts index 0cc4458f52..0b6afd7e4c 100644 --- a/packages/hooks/hooks-claude/tests/bridge.spec.ts +++ b/packages/hooks/hooks-claude/tests/bridge.spec.ts @@ -322,17 +322,29 @@ describe('hooks-claude bridge — load resilience', () => { }) it('disposing the bridge fiber removes its listeners (HMR safety)', async () => { - const dir = writeConfig({ UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'true' }] }] }) + // A BLOCKING UserPromptSubmit hook: if the listener leaked past dispose it + // would veto the prompt (0 model requests) and log a hook/invoked. Build the + // ctx WITHOUT the harness's own bridge mount so this is the ONLY mount, then + // dispose it — a leaked listener fails the test (a no-op `true` hook would + // pass even leaked, so it proved nothing). + const dir = writeConfig({ UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'exit 2' }] }] }) const adapter = new MockAdapter([textResponse('ok')]) - const ctx = await harness(dir, adapter) + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 }) const fiber = await ctx.plugin(HooksClaude, { configPath: join(dir, 'hooks.json') }) await fiber.dispose() - // After disposing this second mount, the FIRST mount's listeners still work, - // but the disposed one contributed none — assert no leaked listener throws. + ctx.llm.registerAdapter(['mock'], adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) agent.send([{ type: 'text', text: 'go' }]) await waitForIdle(ctx, agent) - expect(adapter.requests.length).toBeGreaterThanOrEqual(1) + expect(adapter.requests).toHaveLength(1) // not blocked → the listener is gone + expect(events(agent).some(e => e.type === 'hook/invoked')).toBe(false) // no hook ran }) it('has the namespace-plugin export shape (no stray default) so the Loader keeps name/inject/apply', () => { diff --git a/packages/hooks/hooks-codex/src/index.ts b/packages/hooks/hooks-codex/src/index.ts index e3e2ac020b..3ef1d2806a 100644 --- a/packages/hooks/hooks-codex/src/index.ts +++ b/packages/hooks/hooks-codex/src/index.ts @@ -110,14 +110,18 @@ export function apply(ctx: Context, config: Config): void { // Discard a `hookSpecificOutput` block naming a different event. expectedEventName: point, }, () => performance.now()) - // Codex's SessionStart/UserPromptSubmit treat a clean hook's PLAIN + // Codex's SessionStart/UserPromptSubmit treat a CLEAN hook's PLAIN // (non-JSON) stdout as additionalContext. The codec keeps that raw text on // `output.stdout` but only sets `additionalContext` from a JSON // `hookSpecificOutput`, so fold plain stdout in here and let the shared - // merge + contextFrom path carry it. Guarded on the codec's own JSON gate - // (stdout starting with `{`) so a structured hook's raw JSON is never - // injected as prose, and it never clobbers an explicit additionalContext. - if (opts.plainStdoutAsContext === true && output.additionalContext === undefined + // merge + contextFrom path carry it. Gated exactly like the codec's own + // structured-stdout parse: only on a clean `exitCode === 0` (a non-zero + // exit is an error, not context — an `echo x; exit 2` must not inject + // `x`), only when stdout is non-JSON (`!startsWith('{')` — a structured + // hook's raw JSON is never dumped as prose), and never clobbering an + // explicit additionalContext from a JSON block. + if (opts.plainStdoutAsContext === true && output.exitCode === 0 + && output.additionalContext === undefined && output.stdout.length > 0 && !output.stdout.startsWith('{')) { output.additionalContext = output.stdout } diff --git a/packages/hooks/hooks-codex/tests/bridge.spec.ts b/packages/hooks/hooks-codex/tests/bridge.spec.ts index f62fa4d66c..0148da104e 100644 --- a/packages/hooks/hooks-codex/tests/bridge.spec.ts +++ b/packages/hooks/hooks-codex/tests/bridge.spec.ts @@ -132,9 +132,14 @@ describe('hooks-codex bridge', () => { expect(adapter.requests).toHaveLength(1) }) - it('disposing the bridge fiber is clean (HMR safety)', async () => { + it('disposing the bridge fiber removes its listeners (HMR safety)', async () => { const dir = configDir() - writeHooks(dir, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: 'true' }] }] }) + // A BLOCKING UserPromptSubmit hook: if the listener leaked past dispose, it + // would veto the prompt (0 model requests) and log a hook/invoked. After a + // clean dispose the turn must proceed untouched — this fails loudly on a leak + // (a no-op `true` hook would pass even with a leaked listener). + const deny = script(dir, 'deny.sh', '#!/usr/bin/env bash\nexit 2\n') + writeHooks(dir, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: deny }] }] }) const adapter = new MockAdapter([textResponse('ok')]) const ctx = new Context() await ctx.plugin(LlmService) @@ -150,7 +155,8 @@ describe('hooks-codex bridge', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) agent.send([{ type: 'text', text: 'go' }]) await waitForIdle(ctx, agent) - expect(adapter.requests).toHaveLength(1) + expect(adapter.requests).toHaveLength(1) // not blocked → the listener is gone + expect(events(agent).some(e => e.type === 'hook/invoked')).toBe(false) // no hook ran }) it('has the namespace-plugin export shape (no stray default) so the Loader keeps name/inject/apply', () => { diff --git a/packages/hooks/hooks-codex/tests/coverage.spec.ts b/packages/hooks/hooks-codex/tests/coverage.spec.ts index c32d0b3b91..bc4008ab1e 100644 --- a/packages/hooks/hooks-codex/tests/coverage.spec.ts +++ b/packages/hooks/hooks-codex/tests/coverage.spec.ts @@ -179,12 +179,15 @@ describe('hooks-codex coverage — decision mapping paths', () => { it('SessionStart with no additionalContext is a no-op (contextFrom empty)', async () => { const d = dir() - hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', '#!/usr/bin/env bash\nexit 0\n') }] }] }) + // The hook touches a marker so we can wait for it to ACTUALLY FINISH before + // asserting absence — a completed turn alone would not prove the detached + // session-start hook ran, making the absence check a false pass. + const marker = join(d, 'ss-ran') + hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', `#!/usr/bin/env bash\ntouch "${marker}"\nexit 0\n`) }] }] }) const adapter = new MockAdapter([textResponse('ok')]) const ctx = await harness(join(d, 'hooks.json'), adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - // A completed turn proves session-start already ran; the clean no-output hook - // injected nothing, so no context/message exists. + await waitFor(() => existsSync(marker)) // the clean no-output hook has finished agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) expect(events(agent).some(e => e.type === 'context/message')).toBe(false) }) @@ -347,6 +350,37 @@ describe('hooks-codex coverage — decision mapping paths', () => { expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('extra guidance from a plain hook') }) + it('a NON-clean SessionStart hook (exit 2) does NOT inject its stdout as context', async () => { + // The plain-stdout→context fold is gated on exitCode === 0, matching the + // codec's structured-stdout rule. SessionStart is an EMIT (cannot block), so + // an `echo stale; exit 2` here is the exact case the gate guards: without it, + // the non-clean hook's stdout would wrongly inject "stale". A marker lets us + // wait for the detached hook to finish before asserting absence. + const d = dir() + const marker = join(d, 'ran') + hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 'b.sh', `#!/usr/bin/env bash\ntouch "${marker}"\necho "stale"\nexit 2\n`) }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + await waitFor(() => existsSync(marker)) // the exit-2 hook has finished + expect(events(agent).some(e => e.type === 'context/message' + && e.data.content.some(b => b.type === 'text' && b.text.includes('stale')))).toBe(false) + }) + + it('a UserPromptSubmit hook with a non-blocking error exit (1) + stdout does NOT inject it', async () => { + // Exit 1 is a non-blocking error (no decision), so the prompt is NOT blocked + // and the handler falls through to the context path — the gate must still + // suppress the error hook's stdout ("stale" never reaches the model). + const d = dir() + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'e.sh', '#!/usr/bin/env bash\necho "stale"\nexit 1\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(1) // exit 1 is non-blocking → the turn ran + expect(JSON.stringify(adapter.requests[0]!.messages)).not.toContain('stale') + }) + it('a clean SessionStart hook that prints PLAIN stdout injects it (not JSON)', async () => { const d = dir() hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 'ss.sh', '#!/usr/bin/env bash\necho "session preamble"\nexit 0\n') }] }] }) From 7097e4fb506ea93e63be4dd8dde9604e424da487 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 15:23:09 +0800 Subject: [PATCH 21/47] docs(bash-local): clarify the stdin error handler swallows ANY write error, not just EPIPE MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Review noted the handler's comment said "EPIPE" while the code swallowed every stdin 'error'. Swallowing any stdin-write error IS correct here — the write is best-effort and the command's authoritative outcome is its exit code + captured output (reported by the `close` handler regardless of whether the write landed). A rare non-EPIPE pipe fault means the command ran with incomplete stdin, which it surfaces itself via its own exit/output; rejecting `done` would instead discard that real output and turn it into an opaque infrastructure error. Widen the comment to state this rather than implying only EPIPE is caught. No behavior change. --- packages/bash/bash-local/src/run.ts | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/packages/bash/bash-local/src/run.ts b/packages/bash/bash-local/src/run.ts index 4b043e3fe3..5b67bbdc1b 100644 --- a/packages/bash/bash-local/src/run.ts +++ b/packages/bash/bash-local/src/run.ts @@ -308,12 +308,6 @@ export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningB detached: true, }) - // A child that exits without reading stdin makes the write error EPIPE — - // swallow it (the command's outcome rides on its exit code/output, not the - // stdin write) so it never crashes the host or rejects `done`. - child.stdin.on('error', () => { /* EPIPE: child closed stdin early; outcome rides on exit. */ }) - child.stdin.end(spec.stdin ?? '') - const stdout = new OutputCollector(spec.maxOutputBytes, 'stdout', spillDir) const stderr = new OutputCollector(spec.maxOutputBytes, 'stderr', spillDir) child.stdout.on('data', (chunk: Buffer) => { stdout.push(chunk) }) @@ -347,6 +341,20 @@ export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningB } spec.signal?.addEventListener('abort', onAbort, { once: true }) + // Write stdin and close it. This handler must exist: an unhandled 'error' on + // the stream would throw and crash the host. We swallow the error rather than + // reject `done`, and that is correct for ANY stdin-write error, not just the + // common one — the stdin write is BEST-EFFORT, while the command's authoritative + // outcome is its exit code + captured output, which the `close` handler reports + // regardless of whether the write landed. The expected case is EPIPE (the child + // exited without reading, so closing our end of a still-full pipe fails); a rare + // non-EPIPE pipe fault means the command ran with incomplete stdin, and it + // surfaces that itself through its own exit/output (e.g. a hook that gets + // truncated JSON errors out) — rejecting here would instead discard that real + // output and turn it into an opaque infrastructure error, which is worse. + child.stdin.on('error', () => { /* stdin write is best-effort; outcome rides on exit/output. */ }) + child.stdin.end(spec.stdin ?? '') + const done = new Promise((resolve, reject) => { child.on('error', (error) => { // Spawn-level failure (ENOENT cwd, EACCES, …): no close event with From 3712f67bc647083fe45c66230a05f0fc86b00d90 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 15:39:08 +0800 Subject: [PATCH 22/47] =?UTF-8?q?fix(events):=20address=20review=20?= =?UTF-8?q?=E2=80=94=20core.md=20turn-only=20taxonomy,=20RFC=20mechanism?= =?UTF-8?q?=20names,=20post-execute=20content=20snapshot?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - core-data-structures/core.md: the `agent/*` taxonomy said "turn/step boundaries", but the step-boundary mirror emits were dropped — `agent/*` mirrors only turn boundaries; step boundaries are durable `step/start`/ `step/end` session events. Narrow the catalog so plugin authors aren't pointed at nonexistent `agent/*` step events. - interception-seams RFC: replace stack-position phrasing ("a later stack PR", "the stack's first change", "the PR that makes...") with durable mechanism/RFC names (the hook bridge packages, the event-domain-semantics RFC). - tools/post-execute snapshot: `dispatched.content` was the same array reference as `result.content`, so a listener's in-place `push`/`splice` leaked into the returned content while a reassignment was masked — the "protect from tampering" comment over-claimed. Copy content into a fresh array so the snapshot guards the array structure; comment now states it is not deep immutability. Regression extended to push a block in-place and assert it does not leak (proven red without the copy). --- docs/core-data-structures/core.md | 2 +- .../implemented/feature/2026-06-30-interception-seams.md | 8 ++++---- packages/core/tools/src/index.ts | 7 +++++-- packages/core/tools/tests/tools.spec.ts | 5 ++++- 4 files changed, 14 insertions(+), 8 deletions(-) diff --git a/docs/core-data-structures/core.md b/docs/core-data-structures/core.md index 2a430cebab..8141df44da 100644 --- a/docs/core-data-structures/core.md +++ b/docs/core-data-structures/core.md @@ -306,7 +306,7 @@ interface Agent { } ``` -`AgentStatus` is `'idle' | 'running' | 'disposed'`. `AgentId` is a branded string. `AgentOptions` (`model?`, `systemPrompt?`) is merge-extensible — plugins add creation options by declaration merging. The `agent/*` event taxonomy (lifecycle, turn/step boundaries, the `agent/prompt-submit`/`agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls) is in [architecture.md § Event taxonomy](../architecture.md#event-taxonomy). +`AgentStatus` is `'idle' | 'running' | 'disposed'`. `AgentId` is a branded string. `AgentOptions` (`model?`, `systemPrompt?`) is merge-extensible — plugins add creation options by declaration merging. The `agent/*` event taxonomy (lifecycle, live turn boundaries, the `agent/prompt-submit`/`agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls) is in [architecture.md § Event taxonomy](../architecture.md#event-taxonomy); step boundaries are durable `step/start`/`step/end` session events only — `agent/*` mirrors turn boundaries, not steps. ## Interception decisions diff --git a/docs/rfc/implemented/feature/2026-06-30-interception-seams.md b/docs/rfc/implemented/feature/2026-06-30-interception-seams.md index 5c00760c46..c79f237343 100644 --- a/docs/rfc/implemented/feature/2026-06-30-interception-seams.md +++ b/docs/rfc/implemented/feature/2026-06-30-interception-seams.md @@ -6,9 +6,9 @@ Status: implemented (accepted 2026-06-30) ## Context -The harness needs a hooks subsystem: users extend or gate the agent at lifecycle points the way Claude Code (CC) and Codex do. The key reframe driving this design is that **"native hooks" are not a package** — a native hook is just an ordinary Cordis plugin subscribing to the canonical lifecycle events. So the real product is a *powerful, well-typed canonical event surface*; the CC/Codex bridges (a later stack PR) are merely translators that map an external shell-hook protocol onto that same surface. Anything a bridge can do, a plain plugin can do directly — more powerfully (no serialization boundary, full `ctx`, typed returns). +The harness needs a hooks subsystem: users extend or gate the agent at lifecycle points the way Claude Code (CC) and Codex do. The key reframe driving this design is that **"native hooks" are not a package** — a native hook is just an ordinary Cordis plugin subscribing to the canonical lifecycle events. So the real product is a *powerful, well-typed canonical event surface*; the CC/Codex bridges (the `dsh-hooks-claude` / `dsh-hooks-codex` packages) are merely translators that map an external shell-hook protocol onto that same surface. Anything a bridge can do, a plain plugin can do directly — more powerfully (no serialization boundary, full `ctx`, typed returns). -Before this change the interception surface was incomplete and inconsistent for that goal: there was no per-prompt seam (CC's `UserPromptSubmit`), no session-start signal (CC's `SessionStart`), the single `tools/execute` waterfall conflated the pre-gate and post-inspect phases (CC splits `PreToolUse`/`PostToolUse`), and `agent/turn-continuation` returned a bare `boolean` with no room for a force-continue *reason*. The [event-domain-semantics RFC](../architecture/2026-06-30-event-domain-semantics.md) (the stack's first change) pinned down the three-domain rule and the typed-Decision idiom as the interception convention; this RFC builds the actual seams on top of it. +Before this change the interception surface was incomplete and inconsistent for that goal: there was no per-prompt seam (CC's `UserPromptSubmit`), no session-start signal (CC's `SessionStart`), the single `tools/execute` waterfall conflated the pre-gate and post-inspect phases (CC splits `PreToolUse`/`PostToolUse`), and `agent/turn-continuation` returned a bare `boolean` with no room for a force-continue *reason*. The [event-domain-semantics RFC](../architecture/2026-06-30-event-domain-semantics.md) pinned down the three-domain rule and the typed-Decision idiom as the interception convention; this RFC builds the actual seams on top of it. ## Decision @@ -38,8 +38,8 @@ Add/​reshape the interception seams so every one returns a small, seam-specifi ### What this PR does NOT do -It does **not** declare `hook/*` SessionEvents (the durable hook-invocation log) — those belong to the `dsh-hook-protocol` library (a later stack PR), because a native plugin can already use the typed Decisions without a durable hook log. A worked native-plugin example/test in this PR (`packages/core/agent-loop/tests/interception.spec.ts`) proves all the seams compose end-to-end through the REAL loop with NO `hook/*` involved — the concrete proof that "native hooks are just a plugin". Compaction (`PreCompact`/`PostCompact`), the Notification hook, Codex `PermissionRequest`, the permission/`ask` system, and the Stop loop-guard remain deferred (`FIXME(permissions)` marks the `ask`→deny degrade). +It does **not** declare `hook/*` SessionEvents (the durable hook-invocation log) — those belong to the `dsh-hook-protocol` library, because a native plugin can already use the typed Decisions without a durable hook log. A worked native-plugin example/test in this PR (`packages/core/agent-loop/tests/interception.spec.ts`) proves all the seams compose end-to-end through the REAL loop with NO `hook/*` involved — the concrete proof that "native hooks are just a plugin". Compaction (`PreCompact`/`PostCompact`), the Notification hook, Codex `PermissionRequest`, the permission/`ask` system, and the Stop loop-guard remain deferred (`FIXME(permissions)` marks the `ask`→deny degrade). ## Consequences -The canonical interception surface is now complete and uniformly typed: a native plugin returns typed decisions directly, and a CC/Codex bridge maps its protocol fields onto the same unions. The loop gained four firing points (session-start emit, prompt-submit waterfall, the post-tool context buffer, the continuation reshape) and the `dsh-tools` registry runs a two-waterfall pipeline; both are documented in [architecture.md](../../../architecture.md) and the package READMEs, and the decision types in [core-data-structures](../../../core-data-structures/core.md#interception-decisions) + [tools.md](../../../core-data-structures/tools.md). All existing `tools/execute` and `turn-continuation` listeners (tests, docs) migrated to the new seams. The ACP bridge maps the new `rejected` reason to `cancelled` (its codec). A pure internal change with no editor-visible transcript shift for the existing scenarios — the new behavior only fires when a hook is registered — so the snapshot goldens are unchanged; a hook-driven snapshot scenario lands with the bridges (the PR that makes a hook observable end-to-end through ACP). +The canonical interception surface is now complete and uniformly typed: a native plugin returns typed decisions directly, and a CC/Codex bridge maps its protocol fields onto the same unions. The loop gained four firing points (session-start emit, prompt-submit waterfall, the post-tool context buffer, the continuation reshape) and the `dsh-tools` registry runs a two-waterfall pipeline; both are documented in [architecture.md](../../../architecture.md) and the package READMEs, and the decision types in [core-data-structures](../../../core-data-structures/core.md#interception-decisions) + [tools.md](../../../core-data-structures/tools.md). All existing `tools/execute` and `turn-continuation` listeners (tests, docs) migrated to the new seams. The ACP bridge maps the new `rejected` reason to `cancelled` (its codec). A pure internal change with no editor-visible transcript shift for the existing scenarios — the new behavior only fires when a hook is registered — so the snapshot goldens are unchanged; a hook-driven snapshot scenario lands with the `dsh-hooks-claude` bridge, which is what makes a hook observable end-to-end through ACP. diff --git a/packages/core/tools/src/index.ts b/packages/core/tools/src/index.ts index b08403503e..73500d9d13 100644 --- a/packages/core/tools/src/index.ts +++ b/packages/core/tools/src/index.ts @@ -471,10 +471,13 @@ export class ToolRegistry extends Service { // authoritative-call-id requirement and the "preserve the dispatched // isError/error" contract. The decision is the ONLY sanctioned channel for a // listener to change the outcome (block, or accept-with-replacement); the - // call id is always the authoritative `exec.callId`. + // call id is always the authoritative `exec.callId`. `content` is copied into + // a fresh array so a listener's in-place `push`/`splice` on `result.content` + // cannot leak into the returned content either (the elements are the same + // references — the snapshot guards the array structure, not deep immutability). const dispatched = { callId: exec.callId, - content: result.content, + content: [...result.content], isError: result.isError, ...result.error ? { error: result.error } : {}, } diff --git a/packages/core/tools/tests/tools.spec.ts b/packages/core/tools/tests/tools.spec.ts index ef67eddb95..a924ab234b 100644 --- a/packages/core/tools/tests/tools.spec.ts +++ b/packages/core/tools/tests/tools.spec.ts @@ -211,10 +211,11 @@ describe('ToolRegistry', () => { ctx.tools.register(echoTool) ctx.on('tools/post-execute', async (_exec, result, next) => { - const mutable = result as { callId: string; isError: boolean; error?: unknown } + const mutable = result as { callId: string; isError: boolean; error?: unknown; content: unknown[] } mutable.callId = 'hijacked' mutable.isError = true mutable.error = { name: 'Evil', code: 'EVIL' } + mutable.content.push({ type: 'text', text: 'INJECTED' }) // in-place array mutation return next() // delegate to the default accept — no decision-level override }) @@ -222,7 +223,9 @@ describe('ToolRegistry', () => { expect(result.callId).toBe(CallId('c1')) // authoritative exec.callId, not 'hijacked' expect(result.isError).toBe(false) // the real (successful) dispatch outcome expect(result.error).toBeUndefined() // no listener-injected error + expect(result.content).toHaveLength(1) // the in-place push did not leak in expect(result.content[0]).toMatchObject({ text: 'hi' }) + expect(result.content.some(b => (b as { text?: string }).text === 'INJECTED')).toBe(false) }) it('composes pre + post waterfalls around dispatch (sandbox-wrap pattern)', async () => { From 826fda3f577f9813cf91cfff6aaf5966e841f6c5 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 15:53:16 +0800 Subject: [PATCH 23/47] fix(subagent): contain a structuredClone failure on the detached subagent/end path MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Review noted the deep-clone of the child output runs inside `onFulfilled`, OUTSIDE emitLifecycle's per-listener containment, and the settle `.then` is `void`ed — so an uncloneable output (a future non-serializable content-block type, or a contract-violating result) would throw and become an UNHANDLED rejection, contradicting the "any throw is contained" guarantee the comment claims. Wrap the clone in try/catch: on failure, log via ctx.logger.warn and emit subagent/end WITHOUT lastAssistantMessage (preserving stopReason/agentType) rather than dropping the event or crashing. Regression proves the unfixed code produces an unhandled rejection. --- packages/subagent/subagent/src/index.ts | 16 +++++++-- .../subagent/subagent/tests/service.spec.ts | 35 +++++++++++++++++++ 2 files changed, 49 insertions(+), 2 deletions(-) diff --git a/packages/subagent/subagent/src/index.ts b/packages/subagent/subagent/src/index.ts index ec66118ec6..ee6540f44a 100644 --- a/packages/subagent/subagent/src/index.ts +++ b/packages/subagent/subagent/src/index.ts @@ -207,8 +207,20 @@ export class SubagentService extends Service { // the SAME array reference the caller consumes would let a mutating // `subagent/end` listener corrupt the caller's SubagentResult.output — // breaking the observe-only contract. A snapshot makes the event a - // read-only view, not a shared handle. - this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: result.stopReason, lastAssistantMessage: structuredClone(result.output) }) + // read-only view, not a shared handle. The clone is wrapped: it runs + // inside `onFulfilled`, OUTSIDE emitLifecycle's per-listener containment, + // so an uncloneable value (a future non-serializable content-block type, + // or a contract-violating result with no `output`) would otherwise become + // an unhandled rejection on this detached `.then`. On clone failure, log + // and emit the event WITHOUT lastAssistantMessage rather than dropping the + // whole `subagent/end`. + let lastAssistantMessage: SubagentResult['output'] | undefined + try { + lastAssistantMessage = structuredClone(result.output) + } catch (error: unknown) { + this.ctx.logger.warn(`subagent: could not clone ${name} output for subagent/end: ${String(error)}`) + } + this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: result.stopReason, ...lastAssistantMessage !== undefined ? { lastAssistantMessage } : {} }) }, () => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: 'error' }) }, ) diff --git a/packages/subagent/subagent/tests/service.spec.ts b/packages/subagent/subagent/tests/service.spec.ts index 2e5a3ef8a7..9db02ebe34 100644 --- a/packages/subagent/subagent/tests/service.spec.ts +++ b/packages/subagent/subagent/tests/service.spec.ts @@ -277,6 +277,41 @@ describe('SubagentService', () => { expect('lastAssistantMessage' in endInfo).toBe(false) // but no output exists }) + it('contains a structuredClone failure: emits subagent/end without lastAssistantMessage (no unhandled rejection)', async () => { + // The clone runs inside onFulfilled, OUTSIDE emitLifecycle's per-listener + // containment. An uncloneable output (here a content block carrying a + // function) would otherwise throw and become an unhandled rejection on the + // detached `.then`. The handler must instead log and emit the event WITHOUT + // lastAssistantMessage, still carrying the real stopReason/agentType. + const ctx = new Context() + await ctx.plugin(SubagentService) + const warn = vi.fn(); ctx.logger.warn = warn as never + // An output value structuredClone cannot handle (a function is uncloneable). + const uncloneable = [{ type: 'text', text: 'x', evil: () => 0 }] as unknown as SubagentResult['output'] + ctx.subagents.registerProvider({ + name: 'unclone', + capabilities: NO_CAPS, + start: () => ({ + id: AgentId('unclone-child'), + result: Promise.resolve({ output: uncloneable, stopReason: 'completed' } as SubagentResult), + cancel() {}, + dispose: async () => {}, + }), + }) + + const ended = vi.fn() + ctx.on('subagent/end', ended) + const run = ctx.subagents.start('unclone', baseRequest({ agentType: 'researcher' })) + await run.result + await Promise.resolve() + + const endInfo = ended.mock.calls[0]![0] as Record + expect(endInfo.stopReason).toBe('completed') // the real outcome is preserved + expect(endInfo.agentType).toBe('researcher') + expect('lastAssistantMessage' in endInfo).toBe(false) // clone failed → omitted, not crashed + expect(warn).toHaveBeenCalledWith(expect.stringContaining('could not clone')) + }) + it('emits subagent/end with stopReason "error" when the run result promise rejects', async () => { const ctx = new Context() await ctx.plugin(SubagentService) From 8f2ef9dc9bb493bdd22fffeaaa39ea092b49f611 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 15:58:56 +0800 Subject: [PATCH 24/47] docs(hook-protocol): matcher's invalid-regex handling is SILENT, not bridge-logged MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Review noted the module docs promised an invalid regex is "logged by the bridge", but matchesMatcher only returns `false` — callers cannot distinguish a genuine non-match from a compile failure, so a typo'd pattern silently disables that matcher with no warning. Both bridges call matchesMatcher directly, so no log happens anywhere. Correct the docs to state the silence explicitly; surfacing bad config would need a diagnostic-returning variant or parse-time validation, marked TODO(matcher-diagnostics). No behavior change. --- packages/hooks/hook-protocol/src/matcher.ts | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/packages/hooks/hook-protocol/src/matcher.ts b/packages/hooks/hook-protocol/src/matcher.ts index 4ce3e4b62d..ee1dd324b3 100644 --- a/packages/hooks/hook-protocol/src/matcher.ts +++ b/packages/hooks/hook-protocol/src/matcher.ts @@ -9,8 +9,11 @@ * - `codex`: every pattern is an unanchored regex (no literal fast path). * * Both treat an absent / empty / `'*'` pattern as match-all, and both treat an - * invalid regex as a non-match (the bridge logs it; a broken matcher must not - * throw into the loop). + * invalid regex as a non-match: a broken matcher selects nothing rather than + * throwing into the loop. This is SILENT — the boolean return cannot distinguish + * "did not match" from "failed to compile", so a typo'd pattern (e.g. `[`) + * quietly disables that matcher with no warning. Surfacing bad config would need + * a diagnostic-returning variant or parse-time validation (`TODO(matcher-diagnostics)`). * * @module @deepseek-ai/dsh-hook-protocol/matcher */ @@ -43,7 +46,9 @@ export function matchesMatcher(matcher: string | undefined, query: string, mode: return new RegExp(pattern).test(query) } catch { // Invalid regex: a broken matcher selects nothing rather than throwing into - // the agent loop. The bridge is responsible for surfacing the bad config. + // the agent loop. This is silent — callers get `false`, indistinguishable + // from a genuine non-match, so a typo'd pattern quietly disables the matcher. + // Surfacing it needs a diagnostic-returning variant (TODO(matcher-diagnostics)). return false } } From 09c8e549b060f5fe90a1d2a8354a2ea19b48b2e3 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Wed, 1 Jul 2026 16:34:28 +0800 Subject: [PATCH 25/47] fix(hooks): run hooks in the session cwd; honest process-level config + best-effort session-start; surface systemMessage drop MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address review on the bridges: - Hook cwd (blocking): the bridges never passed a workdir to runHook, so hooks ran in the executor default (the ACP server launch dir), not the session cwd — a hook doing `pwd`/relative reads/marker writes operated in the wrong tree. Both bridges now thread the agent's session `header.cwd` (the session/new.cwd) as the hook workdir for agent-scoped points. Regression per bridge: server cwd ≠ session cwd, a `pwd` hook proves it ran in the session workspace (proven red without the workdir). - Example config honesty (blocking): `configPath: ./hooks.json` is read ONCE at load against the PROCESS cwd, not per-session — the comment/README now say so explicitly (a project-local per-session hooks.json is not discovered; TODO(per-session-hook-config)). The hooks-run-in-session-cwd fix above is the distinct, separately-documented half. - Session-start timing (blocking): agent/session-start is a synchronous emit and the hook runs on a detached .then, so injected context is BEST-EFFORT — not guaranteed before the first request. Downgrade the contract in code comments + README + RFC (TODO(session-start-gating)) rather than implying "first request sees it", and add a no-wait regression that asserts the safe properties without pre-waiting for the inject. - systemMessage (non-blocking): the merge collects merged.systemMessages but no bridge surfaced it. Warn per hook (like updatedInput) and document it as deferred in both READMEs + the RFC; tests assert the warn + non-surfacing. --- .../feature/2026-06-30-hook-bridges.md | 7 +- examples/acp-agent/cordis.snapshot.yml | 13 ++-- examples/acp-agent/cordis.yml | 15 ++-- packages/hooks/hooks-claude/README.md | 5 +- packages/hooks/hooks-claude/src/index.ts | 27 ++++++- .../hooks/hooks-claude/tests/coverage.spec.ts | 76 +++++++++++++++++++ packages/hooks/hooks-codex/README.md | 6 +- packages/hooks/hooks-codex/src/index.ts | 19 ++++- .../hooks/hooks-codex/tests/coverage.spec.ts | 37 +++++++++ 9 files changed, 189 insertions(+), 16 deletions(-) diff --git a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md index 1e782f9b67..d6aea68b17 100644 --- a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md +++ b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md @@ -39,13 +39,18 @@ Each bridge maps the neutral `MergedHookOutcome` from the shared lib onto the se The config is parsed ONCE at load; a read/parse failure logs and registers nothing rather than crashing boot (a typo'd path must not take the agent down). Only `type: 'command'` hooks run — a `prompt`/`agent`/HTTP hook (CC) or an `async: true` / non-command hook (Codex) is parsed-and-skipped with a warning. The emit-listener paths (`session-start`, `subagent/start`) run detached, with their `inject` contained in a `.catch` that logs (a throwing inject must not break session boot or the loop). +### Where hooks run, and where their config comes from + +Two different cwds, kept distinct on purpose. The hooks **themselves** run in the agent's **session workspace**: for the agent-scoped points the bridge threads the session's `cwd` (`session/new.cwd`, on the session header) to `runHook` as the process working directory, so a hook's `pwd` / relative-file read / marker write operates in the user's project tree, not the server's launch directory. The **config path**, by contrast, is **process-level**: `configPath` is resolved and parsed once at load against the process launch cwd, so a single `hooks.json` applies to the whole process — there is no per-session config discovery that reads a project-local `hooks.json` from each `session/new.cwd` (`TODO(per-session-hook-config)`). This is an honest limitation of the current cut: the example `cordis.yml` documents that its `./hooks.json` is process-level, not per-project. + ## Deferred (faithful-but-degraded) - **Tool-input rewrite.** A CC/Codex `updatedInput` is logged + warned, not honored — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite RFC](../../proposed/feature/2026-06-30-pre-tool-input-rewrite.md)), because the pre-execution args are read by `tool/call` audit + `assistant/message` history + ACP/tool-bash presentation, so an honest rewrite is a design unit, not a field. - **Stop loop-guard** (`TODO(stop-loop-guard)`). CC/Codex break an infinite force-continue with `stop_hook_active` (true once a Stop hook fired this run) plus a max-consecutive cap; both are deferred. Today `stop_hook_active` is always `false`, so a Stop hook that unconditionally blocks would force-continue every step — a hook author must self-limit until the guard lands. - **Permission `ask`** degrades to `deny` at the `tools/pre-execute` seam (`FIXME(permissions)` in the interception-seams RFC) — there is no interactive permission prompt yet. - **Hook `continue:false` (hard halt).** A hook can ask to halt the whole run (CC/Codex `continue:false`); the shared merge folds it into `MergedHookOutcome.stop`/`stopReason`, but no bridge acts on it (`TODO(hook-continue-false)`) — the interception seams have no "hard-halt the agent" primitive yet (a Decision blocks/steers a single point, not the run). Deferred with the loop-guard work; the halt request is recorded in the `hook/result` log, and the hook keeps its per-point effect (decision/context) meanwhile. -- **Config discovery.** The path is explicit in `cordis.yml`; the full multi-layer CC/Codex precedence walk and the trust/hash model are not reimplemented (`TODO`). +- **Config discovery.** The path is explicit in `cordis.yml` and process-level (see above); the full multi-layer CC/Codex precedence walk, per-session project-local discovery, and the trust/hash model are not reimplemented (`TODO(per-session-hook-config)`). +- **Session-start / subagent-start context is best-effort, not gated (`TODO(session-start-gating)`).** `agent/session-start` is a synchronous emit and the bridge runs its hook on a detached `.then`, so the injected `additionalContext` is not guaranteed to land before the first turn reaches the model — a slow hook can miss the first request (the context then arrives as a later injection). `subagent/start` is sharper: an in-process provider may have already queued the child's prompt before the listener runs, and a short-lived child can finish before the detached inject fires. Making startup context a gated/awaited primitive is a loop-level change deferred to the interception seams; today the contract is "injected as soon as the hook resolves", not "before the first request". The bridge tests do NOT wait on the injection where they assert the guaranteed-timing behavior, so they document the real (best-effort) timing rather than masking it. ### Multiple hooks on one point run serially, not concurrently diff --git a/examples/acp-agent/cordis.snapshot.yml b/examples/acp-agent/cordis.snapshot.yml index 329f9dc858..aa65e540b4 100644 --- a/examples/acp-agent/cordis.snapshot.yml +++ b/examples/acp-agent/cordis.snapshot.yml @@ -86,11 +86,14 @@ - id: tool-todo name: '@deepseek-ai/dsh-tool-todo' -# The Claude Code hook bridge, pointed at a `hooks.json` in the session cwd. A -# scenario that ships `workspace/hooks.json` (copied into the cwd before the run) -# exercises the hooks path end-to-end; every other scenario has no such file, so -# the bridge's parse fails-soft and it registers nothing (a silent no-op — the -# ACP app loads no logger exporter, so the warning never reaches stdout). +# The Claude Code hook bridge. `configPath` is read ONCE at load and resolves +# `./hooks.json` against the PROCESS cwd (not per-session) — in these snapshot +# runs the harness launches the subprocess with process cwd = the scenario's temp +# workspace, so a scenario that ships `workspace/hooks.json` (copied into that cwd +# before the run) exercises the hooks path end-to-end; every other scenario has no +# such file, so the parse fails-soft and the bridge registers nothing (a silent +# no-op — the ACP app loads no logger exporter, so the warning never reaches +# stdout). Hooks themselves run in the session cwd (the bridge passes it as workdir). - id: hooks-claude name: '@deepseek-ai/dsh-hooks-claude' config: diff --git a/examples/acp-agent/cordis.yml b/examples/acp-agent/cordis.yml index e483d9ee31..8ade4ce847 100644 --- a/examples/acp-agent/cordis.yml +++ b/examples/acp-agent/cordis.yml @@ -96,11 +96,16 @@ - id: tool-todo name: '@deepseek-ai/dsh-tool-todo' -# The Claude Code hook bridge, pointed at a `hooks.json` in the session cwd. With -# no such file present the parse fails-soft and the bridge registers nothing (a -# silent no-op); a session whose cwd holds a `hooks.json` runs those hooks on the -# interception seams. stdout is the ACP JSON-RPC channel — the bridge's warnings -# go through ctx.logger (no exporter here), never to stdout. +# The Claude Code hook bridge. `configPath` is PROCESS-LEVEL: it is read ONCE at +# load and the relative `./hooks.json` resolves against the ACP server's launch +# cwd, NOT each `session/new.cwd`. So a single `hooks.json` next to where the +# server starts applies to every session; a project-local, per-session hooks.json +# is NOT discovered (per-session config resolution is a TODO — see the bridge +# README). With no file present the parse fails-soft and the bridge registers +# nothing (a silent no-op). Hooks THEMSELVES run in the session cwd (the bridge +# passes it as the workdir); only WHERE the config is read from is process-level. +# stdout is the ACP JSON-RPC channel — the bridge's warnings go through ctx.logger +# (no exporter here), never to stdout. - id: hooks-claude name: '@deepseek-ai/dsh-hooks-claude' config: diff --git a/packages/hooks/hooks-claude/README.md b/packages/hooks/hooks-claude/README.md index 126573c6be..82980ff601 100644 --- a/packages/hooks/hooks-claude/README.md +++ b/packages/hooks/hooks-claude/README.md @@ -25,7 +25,9 @@ In a `cordis.yml`: projectDir: . ``` -The config is parsed **once** at load. A read/parse failure is contained — the bridge logs a warning and registers nothing rather than crashing boot (a typo'd path must not take the agent down). Only `type: 'command'` hooks run; a `prompt`/`agent`/HTTP hook is parsed-and-skipped with a warning. +The config is parsed **once** at load. `configPath` is **process-level**: a relative path resolves against the process's launch cwd at load time, so a single config applies to the whole process — there is no per-session (`session/new.cwd`) config discovery yet (`TODO(per-session-hook-config)`). A read/parse failure is contained — the bridge logs a warning and registers nothing rather than crashing boot (a typo'd path must not take the agent down). Only `type: 'command'` hooks run; a `prompt`/`agent`/HTTP hook is parsed-and-skipped with a warning. + +The hooks **themselves** run in the agent's session workspace: for the agent-scoped points the bridge passes the session's `cwd` (the `session/new.cwd`) as the hook process's working directory, so a hook's `pwd`/relative-path/marker operates in the user's project tree, not the server launch dir. ## Hook points → seam Decisions @@ -48,4 +50,5 @@ Injected context carries an explicit `{ kind: 'plugin', plugin: 'hooks-claude' } ## Deferred (faithful-but-degraded) - **`updatedInput` (tool-input rewrite)** is logged + warned, **not honored** — input rewrite is a deferred consistency-design problem ([the pre-tool-input-rewrite RFC](../../../docs/rfc/proposed/feature/2026-06-30-pre-tool-input-rewrite.md)). +- **`systemMessage`** (a hook's user-facing warning) is logged + warned, **not surfaced** — there is no user-message channel on these seams yet (only model-facing `additionalContext`). The shared merge collects it; the bridge does not yet render it. - **Stop loop-guard.** CC breaks an infinite force-continue with `stop_hook_active` (true once a Stop hook has fired this run) plus a max-consecutive cap; both are deferred (`TODO(stop-loop-guard)`). Today `stop_hook_active` is always `false`, so a Stop hook that unconditionally blocks would force-continue every step — a hook author must self-limit until the guard lands. diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts index 74b1e6f5c0..5b56e5f014 100644 --- a/packages/hooks/hooks-claude/src/index.ts +++ b/packages/hooks/hooks-claude/src/index.ts @@ -51,7 +51,13 @@ export const inject = ['bash'] /** Plugin config: where the CC hook config lives + substitution roots. */ export interface Config { - /** Path to a `hooks.json` or a settings file whose `hooks` key holds the config. */ + /** + * Path to a `hooks.json` or a settings file whose `hooks` key holds the config. + * PROCESS-LEVEL: read once at load, a relative path resolves against the process + * launch cwd, so one config applies to the whole process. + * TODO(per-session-hook-config): per-session discovery of a project-local + * `hooks.json` from each `session/new.cwd` is not yet implemented. + */ configPath: string /** Replaces `${CLAUDE_PLUGIN_ROOT}` in command strings (the plugin's root dir). */ pluginRoot?: string @@ -124,6 +130,12 @@ export function apply(ctx: Context, config: Config): void { ): Promise { const groups: MatcherGroup[] = parsed[point] ?? [] const outputs: HookOutput[] = [] + // Run the hook in the AGENT'S session workspace (the `session/new` cwd on the + // session header), not the executor default (the ACP server's launch dir). + // A hook that does `pwd`, reads a relative file, or writes a marker must + // operate in the user's project tree. Absent for a no-agent run (falls back + // to the executor default). + const workdir = opts.agent?.session.header.cwd for (const group of groups) { if (!matchesMatcher(group.matcher, matchQuery, 'claude')) continue for (const hook of group.hooks) { @@ -138,6 +150,7 @@ export function apply(ctx: Context, config: Config): void { const { output, durationMs } = await runHook(ctx.bash, hook, { payload, ...hookEnv ? { env: hookEnv } : {}, + ...workdir !== undefined ? { cwd: workdir } : {}, ...opts.signal ? { signal: opts.signal } : {}, defaultTimeoutMs, trailingNewline: true, @@ -149,6 +162,9 @@ export function apply(ctx: Context, config: Config): void { if (output.updatedInput !== undefined) { ctx.logger.warn(`hooks-claude: ${point} hook requested updatedInput, which is not yet honored (ignored)`) } + if (output.systemMessage !== undefined) { + ctx.logger.warn(`hooks-claude: ${point} hook emitted a systemMessage, which is not yet surfaced (ignored)`) + } if (session && opts.turn !== undefined) { const stderrSummary = summarize(output.stderr) appendHookResult(session, { @@ -180,7 +196,14 @@ export function apply(ctx: Context, config: Config): void { } // --- SessionStart: emit (cannot block). Inject any additionalContext into the - // agent so the first request sees it. The matcher subject is the source. --- + // agent. The matcher subject is the source. + // TODO(session-start-gating): `agent/session-start` is a SYNCHRONOUS emit and + // this hook runs on a detached `.then`, so the injected context is BEST-EFFORT + // — it is not guaranteed to land before the first turn reaches the model. A + // slow hook can miss the first request (the context then arrives as a later + // injection turn). Gating startup on the hook is a loop-level change deferred + // to the interception seams; today the contract is "injected as soon as the + // hook resolves", not "before the first request". --- ctx.on('agent/session-start', (agent, source) => { void runPoint('SessionStart', source, sessionStartPayload(agent, source), { agent }) .then((merged) => { diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts index ca3a143deb..a1b650f33d 100644 --- a/packages/hooks/hooks-claude/tests/coverage.spec.ts +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -454,3 +454,79 @@ describe('hooks-claude coverage — detached-listener catch handlers', () => { expect(adapter.requests).toHaveLength(1) // loop survived the thrown inject }) }) + +describe('hooks-claude coverage — hook runs in the session cwd, not the server cwd', () => { + it('runs an agent-scoped hook in the session workspace even when the executor default differs', async () => { + // The bug: the bridge passed no workdir, so hooks ran in the executor default + // (the server launch dir), not session/new.cwd. Here the executor default and + // the session cwd are DIFFERENT temp dirs; a PreToolUse hook writes `pwd` to a + // marker and we assert it ran in the SESSION cwd. + const serverDir = dir() + const sessionDir = dir() + const marker = join(sessionDir, 'where') + // The hook is invoked with cwd = session dir, so a relative marker path lands there. + hooks(serverDir, { PreToolUse: [{ hooks: [{ type: 'command', command: 'pwd > where' }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + // Executor default cwd = serverDir (deliberately NOT the session cwd). + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, cwd: serverDir }) + await ctx.plugin(HooksClaude, { configPath: join(serverDir, 'hooks.json') }) + ctx.llm.registerAdapter(['mock'], adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + + const { SessionId } = await import('@deepseek-ai/dsh-session') + const handle = ctx.agents.create({ agentId: AgentId('a1'), sessionId: SessionId('s1'), meta: { cwd: sessionDir }, agentOptions: { model: 'mock' } }) + handle.agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, handle.agent as ReactLoopAgent) + + expect(existsSync(marker)).toBe(true) // the marker landed in the SESSION dir + const { readFileSync } = await import('node:fs') + const where = readFileSync(marker, 'utf8').trim() + // `pwd` may resolve symlinks (/var → /private/var etc.), so compare basenames. + expect(where.endsWith(sessionDir.split('/').pop()!)).toBe(true) + await handle.dispose() + }) +}) + +describe('hooks-claude coverage — systemMessage is warned, not surfaced', () => { + it('a hook emitting a systemMessage is logged as not-yet-surfaced', async () => { + const d = dir() + const s = sh(d, 'sm.sh', '#!/usr/bin/env bash\necho \'{"systemMessage":"heads up"}\'\n') + const path = hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(path, adapter) + const warn = vi.fn(); ctx.logger.warn = warn as never + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(warn).toHaveBeenCalledWith(expect.stringContaining('systemMessage')) + // Not surfaced: the systemMessage text never reaches the model request. + expect(JSON.stringify(adapter.requests[0]!.messages)).not.toContain('heads up') + }) +}) + +describe('hooks-claude coverage — SessionStart timing is best-effort (no-wait)', () => { + it('does NOT crash or block when the prompt is sent immediately (context is best-effort, may miss the first request)', async () => { + // Regression for the documented downgrade: session-start injection is + // detached, so a prompt sent immediately need not observe it. This asserts + // the SAFE properties (no crash, the turn still runs) WITHOUT waiting for the + // inject first — it documents the best-effort timing rather than masking it + // by pre-waiting for context/message (which the guaranteed-timing tests do). + const d = dir() + const s = sh(d, 'start.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SessionStart","additionalContext":"late ctx"}}\'\n') + const path = hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(path, adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + // Send immediately — do NOT wait for the session-start inject. + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(1) // the turn ran regardless of hook timing + }) +}) diff --git a/packages/hooks/hooks-codex/README.md b/packages/hooks/hooks-codex/README.md index e20b3a211d..6b28d7d114 100644 --- a/packages/hooks/hooks-codex/README.md +++ b/packages/hooks/hooks-codex/README.md @@ -31,7 +31,9 @@ In a `cordis.yml`: model: deepseek-v4 ``` -The config is parsed **once** at load; a read/parse failure is contained (logs + registers nothing). Only sync `type: 'command'` hooks run — a non-command or `async: true` hook is parsed-and-skipped with a warning. A hook accepts `timeout` or the `timeoutSec` alias. Events outside the five Codex points are dropped at parse. +The config is parsed **once** at load. `configPath` is **process-level** — a relative path resolves against the process launch cwd at load time, not per-session (`TODO(per-session-hook-config)`). A read/parse failure is contained (logs + registers nothing). Only sync `type: 'command'` hooks run — a non-command or `async: true` hook is parsed-and-skipped with a warning. A hook accepts `timeout` or the `timeoutSec` alias. Events outside the five Codex points are dropped at parse. + +The hooks themselves run in the agent's session workspace: for the agent-scoped points the bridge passes the session's `cwd` as the hook process's working directory, so a hook operates in the user's project tree, not the server launch dir. ## Hook points → seam Decisions @@ -52,3 +54,5 @@ Injected context carries an explicit `{ kind: 'plugin', plugin: 'hooks-codex' }` ## Deferred **Stop loop-guard** (`TODO(stop-loop-guard)`): as in CC, a Stop hook that unconditionally blocks would force-continue every step (`stop_hook_active` is always `false` here); the loop-guard is deferred. A hook author must self-limit until it lands. + +**`systemMessage`**: a hook's user-facing warning is logged + warned, not surfaced — there is no user-message channel on these seams yet (only model-facing `additionalContext`). diff --git a/packages/hooks/hooks-codex/src/index.ts b/packages/hooks/hooks-codex/src/index.ts index 3ef1d2806a..c71a0811ea 100644 --- a/packages/hooks/hooks-codex/src/index.ts +++ b/packages/hooks/hooks-codex/src/index.ts @@ -38,7 +38,12 @@ export const inject = ['bash'] /** Plugin config: where the Codex hooks.json lives + the model name for payloads. */ export interface Config { - /** Path to a Codex `hooks.json`. */ + /** + * Path to a Codex `hooks.json`. PROCESS-LEVEL: read once at load, a relative + * path resolves against the process launch cwd. + * TODO(per-session-hook-config): per-session project-local discovery from each + * `session/new.cwd` is not yet implemented. + */ configPath: string /** The model name stamped on every payload (Codex includes `model` on each event). */ model?: string @@ -90,6 +95,10 @@ export function apply(ctx: Context, config: Config): void { ): Promise { const groups: MatcherGroup[] = parsed[point] ?? [] const outputs: HookOutput[] = [] + // Run the hook in the agent's session workspace (the `session/new` cwd), not + // the executor default (the server launch dir) — a hook reading a relative + // file or `pwd` must see the user's project tree. Absent for a no-agent run. + const workdir = opts.agent?.session.header.cwd for (const group of groups) { // Codex matches with PURE regex (no literal fast path). if (!matchesMatcher(group.matcher, matchQuery, 'codex')) continue @@ -104,6 +113,7 @@ export function apply(ctx: Context, config: Config): void { } const { output, durationMs } = await runHook(ctx.bash, hook, { payload, + ...workdir !== undefined ? { cwd: workdir } : {}, ...opts.signal ? { signal: opts.signal } : {}, defaultTimeoutMs, trailingNewline: false, // Codex writes stdin WITHOUT a trailing newline. @@ -126,6 +136,9 @@ export function apply(ctx: Context, config: Config): void { output.additionalContext = output.stdout } outputs.push(output) + if (output.systemMessage !== undefined) { + ctx.logger.warn(`hooks-codex: ${point} hook emitted a systemMessage, which is not yet surfaced (ignored)`) + } if (session && opts.turn !== undefined) { const stderrSummary = summarize(output.stderr) appendHookResult(session, { @@ -154,6 +167,10 @@ export function apply(ctx: Context, config: Config): void { } // SessionStart: emit. Codex passes a plain-stdout hook's output as additionalContext. + // TODO(session-start-gating): a synchronous emit + detached `.then`, so the + // injected context is BEST-EFFORT — not guaranteed before the first turn reaches + // the model (a slow hook can miss the first request). Gating is a deferred + // loop-level change; the contract is "injected as soon as the hook resolves". ctx.on('agent/session-start', (agent, source) => { void runPoint('SessionStart', source, { ...base(agent, 'SessionStart', model), source }, { agent, plainStdoutAsContext: true }) .then((merged) => { diff --git a/packages/hooks/hooks-codex/tests/coverage.spec.ts b/packages/hooks/hooks-codex/tests/coverage.spec.ts index bc4008ab1e..d7a5806fbd 100644 --- a/packages/hooks/hooks-codex/tests/coverage.spec.ts +++ b/packages/hooks/hooks-codex/tests/coverage.spec.ts @@ -436,4 +436,41 @@ describe('hooks-codex coverage — decision mapping paths', () => { expect(ran).toBe(false) // the matcher fired → the hook denied the tool expect(events(agent).some(e => e.type === 'hook/invoked' && e.data.point === 'PreToolUse')).toBe(true) }) + + it('a hook emitting a systemMessage is warned as not-yet-surfaced', async () => { + const d = dir() + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'sm.sh', '#!/usr/bin/env bash\necho \'{"systemMessage":"heads up"}\'\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + const warn = vi.fn(); ctx.logger.warn = warn as never + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(warn).toHaveBeenCalledWith(expect.stringContaining('systemMessage')) + expect(JSON.stringify(adapter.requests[0]!.messages)).not.toContain('heads up') + }) + + it('runs an agent-scoped hook in the session cwd, not the executor default', async () => { + // Same regression as the CC bridge: the Codex bridge must thread the session + // cwd as the hook workdir. Executor default = serverDir; session cwd = + // sessionDir; the PreToolUse hook's `pwd` marker must land in sessionDir. + const serverDir = dir() + const sessionDir = dir() + const marker = join(sessionDir, 'where') + hooks(serverDir, { PreToolUse: [{ hooks: [{ type: 'command', command: 'pwd > where' }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'Bash', { command: 'x' }), textResponse('done')]) + const ctx = new Context() + await ctx.plugin(LlmService); await ctx.plugin(SessionStore); await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry); await ctx.plugin(AgentRegistry); await ctx.plugin(AgentLoop, { agents: [] }) + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, cwd: serverDir }) + await ctx.plugin(HooksCodex, { configPath: join(serverDir, 'hooks.json'), model: 'm' }) + ctx.llm.registerAdapter(['mock'], adapter) + ctx.tools.register(defineTool({ name: 'Bash', description: 'b', parameters: { command: { type: 'string' } }, async execute() { return [{ type: 'text', text: 'ok' }] } })) + const { SessionId } = await import('@deepseek-ai/dsh-session') + const handle = ctx.agents.create({ agentId: AgentId('a1'), sessionId: SessionId('s1'), meta: { cwd: sessionDir }, agentOptions: { model: 'mock' } }) + handle.agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, handle.agent as ReactLoopAgent) + expect(existsSync(marker)).toBe(true) + expect(readFileSync(marker, 'utf8').trim().endsWith(sessionDir.split('/').pop()!)).toBe(true) + await handle.dispose() + }) }) From 140f818a4245f53670bf3cc5275a0ccfc0031c87 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 03:26:45 +0800 Subject: [PATCH 26/47] refactor(events): remove the turn boundary mirror events MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Complete the boundary-mirror removal begun with the step mirrors: drop `agent/turn-start` and `agent/turn-end` from the agent event taxonomy. Turn and step boundaries are now read exclusively off the durable `session/event` feed (`turn/start`/`turn/end`/`step/start`/`step/end`) — there is no `agent/*` mirror for any boundary. - loop.ts: delete both turn emits; `closeTurn` loses its `emit` parameter and its now-unreachable idempotency guard (it is called exactly once per turn, on mutually exclusive normal/catch paths); `failTurn` loses the dead post-close branch that only a throwing turn-end LISTENER could reach. - ui-stdio: render turn boundaries from `session/event`, recovering the short agent label from an `agent/created`→id map (the `turn/start` event carries only the turn number, and the session id is not reliably the agent id). ui-stdio is a disposable test REPL, so this migration retires the sole justification the event-domain-semantics RFC gave for KEEPING the turn mirrors. - Tests: reason/turn-number collectors and the boundary-ordering test now read `session/event`; the throwing-turn-boundary-LISTENER tests are deleted (that code path no longer exists). A new test covers the outer-catch disposed branch via a pre-step listener that disposes-then-throws (the surviving real path). - Docs: promote the "remove agent boundary mirror events" RFC to implemented (amended/narrowed — `agent/steering` is RETAINED, not a boundary mirror); update the event-domain-semantics + turn-enclosure RFCs, architecture.md, the cookbook, the ACP/agent/ui-stdio prose, and regenerate the cordis catalog. `agent/steering` and `agent/stream-chunk` are explicitly out of scope (not durable-boundary mirrors). ACP is unaffected — it already settles from the log's `turn/end` + `agent/status`; snapshot goldens are byte-unchanged. --- docs/architecture.md | 8 +- docs/cookbook/extension-cookbook.md | 2 +- docs/cordis-catalog/events-and-services.md | 46 +--- docs/rfc/README.md | 2 +- .../2026-06-15-turn-enclosure-invariant.md | 2 +- .../2026-06-30-event-domain-semantics.md | 16 +- ...-20-remove-agent-boundary-mirror-events.md | 37 ++++ ...-20-remove-agent-boundary-mirror-events.md | 31 --- packages/core/agent-loop/src/loop.ts | 73 +++---- packages/core/agent-loop/tests/cancel.spec.ts | 27 ++- .../agent-loop/tests/coverage-edges.spec.ts | 71 +----- packages/core/agent-loop/tests/loop.spec.ts | 33 ++- .../agent-loop/tests/review-fixes.spec.ts | 205 +++++------------- packages/core/agent/README.md | 6 +- packages/core/agent/src/types.ts | 38 +--- packages/support/ui-stdio/README.md | 7 +- packages/support/ui-stdio/src/index.ts | 33 ++- .../support/ui-stdio/tests/ui-stdio.spec.ts | 52 ++++- packages/ui/acp/README.md | 2 +- packages/ui/acp/src/index.ts | 32 +-- 20 files changed, 282 insertions(+), 441 deletions(-) create mode 100644 docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md delete mode 100644 docs/rfc/proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md diff --git a/docs/architecture.md b/docs/architecture.md index da6641440d..8f83625ab0 100644 --- a/docs/architecture.md +++ b/docs/architecture.md @@ -159,7 +159,7 @@ forever: steering pending forces cont = true (from continuation listeners OR from step/end session-event listeners — the /goal pattern; hasSteering override) if !cont: break - session('turn/end'); emit agent/turn-end + session('turn/end') ⟵ durable turn boundary (no agent/* mirror) await ctx.parallel('session/flush', session) ⟵ durability checkpoint (failure reported via agent/error, not fatal) leftover steering re-enqueued as queued messages ⟵ steering is never stranded @@ -170,7 +170,7 @@ Error containment: a throwing `agent/turn-continuation` listener or a broken ste Turn-end reasons: a turn ends with one `TurnEndReason` — `completed`, `aborted`, `error`, `disposed`, or `max-tokens`. `max-tokens` mirrors the model-call `FinishReason` of the same name (DeepSeek's `length`): a step that hit the output-token ceiling makes the turn end `max-tokens` rather than `completed`, by the rule *any `max-tokens` step in the turn surfaces as `max-tokens`* (a continuation plugin may run further steps after one, but the cut-short fact wins; the `disposed`/`aborted`/`error` outcomes still take precedence). This lets a consumer distinguish a clean stop from a truncated one (the ACP bridge maps it to the `max_tokens` stop reason). `TurnEndReason` is merge-extensible; `refusal` and `max_turn_requests` are the next variants to add when an adapter/loop first emits them. -A failure that happens once the turn is already closed has no in-turn position for a turn-end error reason (the turn already ended). So a rejecting `session/flush` (the post-`turn/end` durability checkpoint) and a throwing `agent/turn-end` listener are reported via `agent/error` + the logger only, NOT as a session event; the turn stays balanced and the persistence backend keeps its buffered events for the next flush. +A failure that happens once the turn is already closed has no in-turn position for a turn-end error reason (the turn already ended). So a rejecting `session/flush` (the post-`turn/end` durability checkpoint) is reported via `agent/error` + the logger only, NOT as a session event; the turn stays balanced and the persistence backend keeps its buffered events for the next flush. **Turn-enclosure invariant**: every session event lives inside a turn (between a `turn/start` and its `turn/end`). The loop appends queued `user/message` events *after* `turn/start`, and an idle `agent.inject()` wraps its `context/message` in a one-shot `injection` turn. This makes the turn the single durability/replay boundary: a persistence backend can treat anything after the last `turn/end` as an interrupted-crash tail without risking the loss of legitimately-recorded between-turn context. The `dsh-invariants` plugin enforces it in dev (a message event outside an open turn throws). See [the turn-enclosure invariant](rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md). @@ -196,8 +196,8 @@ Every MVP feature (including the TODO-marked ones), with the mechanism that impl |---|---| | Hook system (user + project level) | listeners on `agent/request`, `agent/step-result`, `tools/execute`, `agent/turn-continuation`; a hooks plugin bridges config files to shell commands | | `/goal` | force-continue via `agent/turn-continuation` + `steer()` reminders | -| `/loop` | on `agent/turn-end`, `send()` the next iteration; or force-continue | -| Dynamic workflow | orchestrator plugin on `agent/turn-end` (or the `step/end` session event) driving `send`/`steer` (+ sub-agents later) | +| `/loop` | on the `turn/end` session event, `send()` the next iteration; or force-continue | +| Dynamic workflow | orchestrator plugin on the `turn/end` (or `step/end`) session event driving `send`/`steer` (+ sub-agents later) | | Queued + steering messages | core `Agent.send()` / `Agent.steer()` | | Context compaction (auto + manual) | the `dsh-compact` seam (`ctx.compact`) + a backend (`dsh-compact-basic`) on the serial `agent/pre-step` seam: a backend summarizes an older surface range into a single `user/message` `replace` op, bracketed by log-only `compact/*` events; auto = check token pressure before each step — runaway-turn survival, manual = a (deferred) `/compact` tool invoking the same `ctx.compact` routine. See the [compaction capability-seam RFC](rfc/implemented/feature/2026-06-18-compaction-capability-seam.md) | | System prompt configurability | `ctx.systemPrompt.section()` with ordering | diff --git a/docs/cookbook/extension-cookbook.md b/docs/cookbook/extension-cookbook.md index e6c0378361..48b3874bd4 100644 --- a/docs/cookbook/extension-cookbook.md +++ b/docs/cookbook/extension-cookbook.md @@ -56,7 +56,7 @@ export function apply(ctx: Context) { ## A client-driver plugin (external protocol bridge) -A *client driver* is a UI plugin whose "user" is another program speaking a wire protocol rather than a human at a terminal. It owns the process's stdio (so it must run with **no stdout logger** — every non-protocol byte corrupts the stream), creates/resumes agents on demand through the `dsh-agent` factory seam, translates harness events (`session/event`, `agent/*`) into outbound protocol messages, and translates inbound requests back into `agent.send()` / `agent.cancel()`. Two harness-specific contracts make it correct: resolve each request exactly once off a settle signal (the turn can end without its `agent/turn-end` event firing — fall back through the logged `turn/end` record), and tear each agent down through its `AgentHandle.dispose()` (which stops the loop, `await`s its exit, and unregisters), not just `cancel()` — disposal must *reach* quiescence, not merely request it. +A *client driver* is a UI plugin whose "user" is another program speaking a wire protocol rather than a human at a terminal. It owns the process's stdio (so it must run with **no stdout logger** — every non-protocol byte corrupts the stream), creates/resumes agents on demand through the `dsh-agent` factory seam, translates harness events (`session/event`, `agent/*`) into outbound protocol messages, and translates inbound requests back into `agent.send()` / `agent.cancel()`. Two harness-specific contracts make it correct: resolve each request exactly once off a settle signal (settle from the durable `turn/end` session event — the boundary is a session event, not an `agent/*` mirror — with `agent/status` as the fallback if a peer listener starved yours), and tear each agent down through its `AgentHandle.dispose()` (which stops the loop, `await`s its exit, and unregisters), not just `cancel()` — disposal must *reach* quiescence, not merely request it. `packages/ui/acp` is the worked example: it bridges the agent to the Agent Client Protocol (JSON-RPC over stdio) so Zed and other ACP editors can drive it. See its README for the full method surface and the deferred-permission-gate note. diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index c26b453a4f..e9a4447aec 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages. Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:165`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:164`](../../packages/core/agent/src/types.ts) #### `agent/disposed` — emit @@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:171`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:170`](../../packages/core/agent/src/types.ts) #### `agent/error` — emit @@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:279`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:263`](../../packages/core/agent/src/types.ts) #### `agent/pre-step` — serial @@ -63,7 +63,7 @@ Serial (awaited in registration order), not a waterfall: a listener mutates the Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:239`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:223`](../../packages/core/agent/src/types.ts) #### `agent/queued` — emit @@ -75,7 +75,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:184`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:183`](../../packages/core/agent/src/types.ts) #### `agent/request` — waterfall @@ -87,7 +87,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:248`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:232`](../../packages/core/agent/src/types.ts) #### `agent/status` — emit @@ -99,7 +99,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:178`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:177`](../../packages/core/agent/src/types.ts) #### `agent/steering` — emit @@ -111,7 +111,7 @@ Steering content was injected into a running turn. Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:273`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:257`](../../packages/core/agent/src/types.ts) #### `agent/step-result` — waterfall @@ -123,7 +123,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:254`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:238`](../../packages/core/agent/src/types.ts) #### `agent/stream-chunk` — emit @@ -135,7 +135,7 @@ A raw StreamChunk arrived from the model (token-level UI/log feed). Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md) -Source: [`packages/core/agent/src/types.ts:268`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:252`](../../packages/core/agent/src/types.ts) #### `agent/turn-continuation` — waterfall @@ -147,31 +147,7 @@ Waterfall: override the turn-continuation decision. The default (computed by the Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:261`](../../packages/core/agent/src/types.ts) - -#### `agent/turn-end` — emit - -A turn ended. `reason` distinguishes a clean stop from a truncated, aborted, failed, disposed, or crash-interrupted one (`completed` | `aborted` | `error` | `disposed` | `max-tokens` | `interrupted`); the reason union is merge-extensible, so a plugin can add further variants. - -```ts cordis-catalog -'agent/turn-end'(agent: Agent, turn: number, reason: TurnEndReason): void -``` - -Types: [Agent](../core-data-structures/core.md) · [TurnEndReason](../core-data-structures/session.md) - -Source: [`packages/core/agent/src/types.ts:205`](../../packages/core/agent/src/types.ts) - -#### `agent/turn-start` — emit - -A turn began. `turn` is the 1-based turn number within the session. - -```ts cordis-catalog -'agent/turn-start'(agent: Agent, turn: number): void -``` - -Types: [Agent](../core-data-structures/core.md) - -Source: [`packages/core/agent/src/types.ts:197`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:245`](../../packages/core/agent/src/types.ts) ### `llm/*` diff --git a/docs/rfc/README.md b/docs/rfc/README.md index 30dbb7702c..64868d475e 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -50,7 +50,6 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | Title | First proposed | |---|---| | [Unify the agent id and the session id](proposed/simplification/2026-06-20-unify-agent-and-session-id.md) | 2026-06-20 | -| [Stop mirroring durable boundaries as agent events](proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md) | 2026-06-20 | ### Architecture @@ -97,6 +96,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Prune dead methods from the persistence seam](implemented/simplification/2026-06-20-prune-dead-seam-methods.md) | 2026-06-20 | | [Keep one public stop primitive](implemented/simplification/2026-06-20-public-agent-stop-surface.md) | 2026-06-20 | | [Fold trace-only session facts into load-bearing events](implemented/simplification/2026-06-20-collapse-trace-only-session-events.md) | 2026-06-20 | +| [Stop mirroring durable boundaries as agent events](implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md) | 2026-06-20 | ### Architecture diff --git a/docs/rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md b/docs/rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md index 42e231430b..63ebc1c875 100644 --- a/docs/rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md +++ b/docs/rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md @@ -37,4 +37,4 @@ Costs: `agent.inject()` while idle now writes three log lines instead of one, an The rule is intentionally producer-enforced and dev-checked rather than reader-tolerated: a future backend (SQLite/WAL) inherits the same clean boundary for free, and a plugin that records an event outside a turn fails loudly in dev instead of silently losing data on the next reload. -The invariant also constrains where the loop may record an `error` event. A failure detected while a turn is open is appended INSIDE the turn (before `turn/end`); but a failure that surfaces once the turn is already closed — a rejecting `session/flush` (which runs as the post-`turn/end` durability checkpoint) or a throwing `agent/turn-end` listener (after `closeTurn` already appended `turn/end`) — has no in-turn position left. Appending an `error` there would land it past the last `turn/end`, exactly the crash-tail position a backend discards. So those post-turn failures are reported via the `agent/error` event and the logger only, never as a `SessionEvent`; the turn stays balanced and persistence keeps its buffered events for the next checkpoint. If durable operational diagnostics are ever needed, they belong on a separate telemetry channel, not the replayable session log. +The invariant also constrains where the loop may record an `error` event. A failure detected while a turn is open is appended INSIDE the turn (before `turn/end`); but a failure that surfaces once the turn is already closed — a rejecting `session/flush`, which runs as the post-`turn/end` durability checkpoint — has no in-turn position left. Appending an `error` there would land it past the last `turn/end`, exactly the crash-tail position a backend discards. So that post-turn failure is reported via the `agent/error` event and the logger only, never as a `SessionEvent`; the turn stays balanced and persistence keeps its buffered events for the next checkpoint. If durable operational diagnostics are ever needed, they belong on a separate telemetry channel, not the replayable session log. diff --git a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md index c33ff3d5b3..5ca6f874b5 100644 --- a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md +++ b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md @@ -22,18 +22,14 @@ This is the foundational change in a stack that adds a Hooks subsystem; it estab - **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/stream-chunk`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`, and the turn boundaries) that notify with the `Agent` in hand. - **`tools/*` — the tool registry + execution seam.** -**The boundary rule:** a durable, replayable fact is a `SessionEvent`; a live interception or a transient/live-object signal is an `agent`/`tools` Cordis event. A datum that is BOTH — a turn or step boundary — lives in the session log, and is mirrored as an `agent/*` emit ONLY where a live consumer provably needs the `Agent` handle at that instant. +**The boundary rule:** a durable, replayable fact is a `SessionEvent`; a live interception or a transient/live-object signal is an `agent`/`tools` Cordis event. A turn or step boundary is a durable fact, so it lives in the session log and is read off the `session/event` feed — it is NOT mirrored as an `agent/*` emit. -**Applying the rule to the boundary twins (prune case-by-case):** - -- `agent/turn-start` — **KEPT.** The stdio UI (`dsh-ui-stdio`) labels turn output by `agent.id`, which the `turn/start` session event does not carry. A genuine live-object need. -- `agent/turn-end` — **KEPT.** The stdio UI listens to print the next-prompt glyph. (Note: the ACP bridge does NOT settle on this event — it settles from `session/event` `turn/end` plus `agent/status`; the surviving justification is the stdio UI alone.) -- `agent/step-start`, `agent/step-end` — **REMOVED.** No production consumer needs the live `Agent` at a step boundary; a consumer that wants per-step boundaries reads the durable `step/start`/`step/end` session events. Removing the two emits also simplifies the loop's `closeStep` (one append, no paired emit). +**Applying the rule to the boundary twins:** all four boundary mirrors — `agent/turn-start`, `agent/turn-end`, `agent/step-start`, `agent/step-end` — are **REMOVED**. No production consumer needs the live `Agent` at a boundary: the ACP bridge settles from `session/event` `turn/end` plus `agent/status`, and the only turn-mirror consumer (`dsh-ui-stdio`, a disposable test REPL) was migrated to render boundaries from `session/event`, recovering the short agent label from an `agent/created`→id map. The step mirrors were removed first (they had no consumer at all); the turn mirrors followed once ui-stdio was migrated — see [the remove-boundary-mirror-events RFC](../simplification/2026-06-20-remove-agent-boundary-mirror-events.md), which owns that decision. Removing the emits also simplifies the loop's `closeStep`/`closeTurn` (one append each, no paired emit). ## Consequences -- The loop no longer emits `agent/step-start`/`agent/step-end`; `closeStep` appends `step/end` only, and a throwing `step/end` session-event listener is the surviving step-boundary-listener failure path (contained by `closeStep` → `failTurn`, the turn closes balanced). -- Tests that observed step boundaries via the removed emits now observe the durable `step/start`/`step/end` session events — the behavior they pin (boundary ordering, step counting, a throwing boundary listener failing the turn balanced) is unchanged; only the feed they read moved to the canonical one. Per [AGENTS.md "tests document behavior, not golden truth"](../../../../AGENTS.md), the behavior and its test moved together. +- The loop no longer emits any boundary mirror; `closeStep` appends `step/end` only and `closeTurn` appends `turn/end` only. A throwing `step/end`/`turn/end` session-event listener is the surviving boundary-listener failure path (contained inside `closeStep`/`closeTurn` — `Session.append` pushes the event before notifying listeners, so the boundary is durable and the turn closes balanced regardless). +- Tests that observed boundaries via the removed emits now observe the durable `turn/start`/`turn/end`/`step/start`/`step/end` session events — the behavior they pin (boundary ordering, step counting) is unchanged; only the feed they read moved to the canonical one. The tests that exercised a *throwing turn-boundary emit listener* were deleted, because that code path no longer exists (there is no emit to throw from). Per [AGENTS.md "tests document behavior, not golden truth"](../../../../AGENTS.md), the behavior and its test moved (or died) together. - The loop marks the step open (`stepOpen = true`) BEFORE appending `step/start`, because `Session.append` pushes the event to the log before notifying `session/event` listeners (validation throws happen earlier, before the push — see [the session append contract](../../../core-data-structures/session.md)). So a throwing `step/start` session-event listener runs with the step already open and the event already in the log: the loop's outer catch then calls `closeStep()`, which appends the balancing `step/end`, and the turn closes balanced with an error (`turn/start → step/start → step/end → turn/end` — verified by the invariants oracle in the regression test). Closing the open step is owed precisely because the marker is set first. -- This is a partial, conservative realization of the broader [proposed simplification "Stop mirroring durable boundaries as agent events"](../../proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md): that RFC proposes removing ALL boundary mirrors (including the turn boundaries and `agent/steering`) and migrating the stdio UI's turn rendering onto `session/event`. This RFC removes only the two step mirrors that have no live consumer; the turn mirrors stay until the stdio UI is migrated. The proposed RFC remains the home for finishing that migration. -- The cordis catalog (`docs/cordis-catalog/events-and-services.md`) is regenerated to drop the two events. +- The full realization of this is [the simplification RFC "Stop mirroring durable boundaries as agent events"](../simplification/2026-06-20-remove-agent-boundary-mirror-events.md): all four boundary mirrors are removed and every consumer reads boundaries off `session/event`. `agent/steering` (a live control signal, not a boundary mirror) is retained; see that RFC's scope section. +- The cordis catalog (`docs/cordis-catalog/events-and-services.md`) is regenerated to drop the mirror events. diff --git a/docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md b/docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md new file mode 100644 index 0000000000..d4cf8bbfe9 --- /dev/null +++ b/docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md @@ -0,0 +1,37 @@ +# RFC: Stop mirroring durable boundaries as agent events + +Status: implemented (accepted 2026-07-01) + + + +## Problem + +The loop records the canonical transcript in `SessionEvent` and also emitted a parallel set of live `agent/*` boundary mirror events: `agent/turn-start`, `agent/turn-end`, `agent/step-start`, and `agent/step-end`. The mirrors made consumers choose between two sources of truth for the SAME durable fact. ACP already chose the session log for the editor-facing transcript because a throwing peer listener can prevent later `agent/*` listeners from observing a boundary, while the session event was already appended. The stdio UI was the only production consumer that still rendered turn boundaries from the mirror events; it already rendered tool calls and results from `session/event`. + +This duplication is not free. Every lifecycle change had to update the session event, the mirror event, docs, invariants, tests, and snapshot expectations. The duplicate boundary events also made failure ordering subtle: a turn can be durably closed before a live `agent/turn-end` listener runs, so a post-boundary listener failure has no valid in-log position left and must be reported out of band. + +## Decision + +Make `session/event` the single live boundary/transcript stream. Consumers that render turns, tool calls, tool results, assistant messages, and durable boundaries subscribe to `session/event` and derive their UI from the same event vocabulary persistence uses. + +The four durable-boundary mirrors — `agent/turn-start`, `agent/turn-end`, `agent/step-start`, `agent/step-end` — are removed from the agent event taxonomy. A UI that wants the agent handle (or its short id) at a boundary keeps a small map from session id to agent id built from `agent/created`/`agent/disposed`; `dsh-ui-stdio` does exactly this to label its `[ turn N]` header, since the `turn/start` session event carries only the turn number. The canonical record remains the event-sourced session log. + +The step mirrors (which had no consumer at all) were removed first, in [the event-domain-semantics RFC](../architecture/2026-06-30-event-domain-semantics.md); that RFC KEPT the turn mirrors on the stated justification that the stdio UI needed the `Agent` handle at the turn boundary. This RFC finishes the job: `dsh-ui-stdio` is a disposable test REPL whose rendering can change freely, so "ui-stdio needs it" is not a reason to keep a mirror — it was migrated to `session/event` + the id map, and the turn mirrors were removed too. + +## Scope: what is and isn't removed + +Removed (durable-boundary mirrors — the session log is authoritative for each): `agent/turn-start`, `agent/turn-end`, `agent/step-start`, `agent/step-end`. + +RETAINED — NOT durable-boundary mirrors, so out of scope for this decision: + +- `agent/steering` — a live control signal, not a boundary. (The original proposal bundled it into the removal; validating against the code, it is not a duplicate of a durable boundary, so removing it here would have been scope creep. Its fate is a separate future decision.) +- `agent/stream-chunk` — the live token stream. `assistant/chunk` persistence remains load-bearing, so the chunk stream could later be evaluated as a mirror, but that is a separate decision. +- `agent/created`, `agent/disposed`, `agent/status`, `agent/error`, `agent/queued` — lifecycle/control events that are not transcript data. `agent/queued` in particular is an inbox acknowledgement that fires before any durable event exists (cancelled queued work may never enter the log), so it is deliberately live-only. + +## What we give up + +A plugin can no longer observe turn/step boundaries from a convenient `Agent`-first event. It must either subscribe to `session/event` or maintain a session-to-agent association. That is an acceptable trade: boundary consumers should not depend on a second event feed that can drift from the durable log. diff --git a/docs/rfc/proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md b/docs/rfc/proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md deleted file mode 100644 index 4b1cd75a56..0000000000 --- a/docs/rfc/proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md +++ /dev/null @@ -1,31 +0,0 @@ -# RFC: Stop mirroring durable boundaries as agent events - -Status: proposed - -## Problem - -The loop records the canonical transcript in `SessionEvent` and also emits a parallel set of live `agent/*` mirror events: `agent/turn-start`, `agent/turn-end`, `agent/step-start`, `agent/step-end`, `agent/stream-chunk`, and `agent/steering`. The mirrors make consumers choose between two sources of truth. ACP already chose the session log for the editor-facing transcript because a throwing peer listener can prevent later `agent/*` listeners from observing a boundary, while the session event was already appended. The stdio UI is the only production consumer that still renders turn boundaries and the token stream from the mirror events; it already renders tool calls and results from `session/event`. - -This duplication is not free. Every lifecycle change has to update the session event, the mirror event, docs, invariants, tests, and snapshot expectations. The duplicate boundary events also make failure ordering subtle: a turn can be durably closed before a live `agent/turn-end` listener runs, so a post-boundary listener failure has no valid in-log position left and must be reported out of band. - -## Proposal - -Make `session/event` the live transcript stream. Consumers that render turns, tool calls, tool results, assistant messages, and durable boundaries subscribe to `session/event` and derive their UI from the same event vocabulary persistence uses. Keep agent lifecycle/control events that are not transcript data: `agent/created`, `agent/disposed`, `agent/status`, `agent/error`, and `agent/queued`. `agent/queued` is an inbox acknowledgement rather than a transcript mirror: it fires before any durable event exists, and cancelled queued work may never enter the log. - -Remove the duplicate durable-boundary mirrors from the agent event taxonomy. If a UI wants an agent handle from a session event, it can keep a small map from session id to agent built from `agent/created`/`agent/disposed`, or the registry can offer an explicit lookup. The canonical record remains the event-sourced session log. - -## Acceptance criteria - -- ACP and stdio render transcript content from `session/event`. -- `agent/turn-start`, `agent/turn-end`, `agent/step-start`, `agent/step-end`, and `agent/steering` are removed or reduced to private implementation details. -- `agent/queued` is either retained and documented as live-only inbox/control state, or deleted in a separate proposal that names the queue-acknowledgement capability loss. -- Tests assert the persisted event stream, not a second mirror stream, for turn and step ordering. -- Documentation presents `SessionEvent` as both the durable source and the live transcript feed. - -## What we give up - -A plugin can no longer observe turn/step boundaries from a convenient `Agent`-first event. It must either subscribe to `session/event` or maintain a session-to-agent association. That is an acceptable trade: transcript consumers should not depend on a second event feed that can drift from the durable log. - -## Related - -Because high-fidelity `assistant/chunk` persistence remains load-bearing, `agent/stream-chunk` can be evaluated as another mirror of durable session data rather than as the only token stream. If a future proposal moves chunks out of the canonical log, `agent/stream-chunk` would need a fresh decision as a deliberately live-only UI signal. diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index f71d6167b8..eba75f9615 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -145,7 +145,7 @@ export interface LoopHandle { * forever: * wait for queued messages (idle) * TURN (error-contained — a throwing plugin ends the turn, never the loop): - * drain queued → 'turn/start' → session('user/message'…) → emit agent/turn-start + * drain queued → 'turn/start' → session('user/message'…) ⟵ durable turn boundary (no agent/* mirror) * STEP loop: * drain steering → session('steering/message') ⟵ catches late steering * assembly = ctx.systemPrompt.assemble() ⟵ waterfall system-prompt/assemble @@ -165,7 +165,7 @@ export interface LoopHandle { * cont = waterfall agent/turn-continuation(default = hadToolCalls || steered) * if !cont && steering arrived from step/end session-event/continuation listeners: cont = true * if !cont: break - * session('turn/end'); emit agent/turn-end + * session('turn/end') ⟵ durable turn boundary (no agent/* mirror) * await ctx.parallel('session/flush', session) ⟵ durability checkpoint * re-enqueue leftover steering as queued ⟵ steering is never stranded * idle (emit agent/status) unless more queued @@ -277,7 +277,6 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, let reason: TurnEndReason = { kind: 'completed' } let step = 0 - let turnEnded = false let stepOpen = false let errorReported = false @@ -320,47 +319,38 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, const failTurn = (err: CodedError): void => { if (errorReported) return errorReported = true - // Set the error reason ONLY while the turn is still open — closeTurn appends - // turn/end with it. If the turn has already ended (the only way here: a - // throwing agent/turn-end listener after closeTurn(true) already appended - // turn/end), the reason can no longer affect the durable log, so log the late - // throw directly instead — otherwise the listener exception would vanish. - if (!turnEnded) { - reason = { kind: 'error', step, ...errorData(err) } - } else { - ctx.logger.warn(`agent "${agent.id}": agent/turn-end listener threw after turn ${turn} closed: ${err.message}`) - } + // The turn is always still open here: the only failure that can reach + // failTurn once turn/end is appended would be a throwing turn-boundary + // listener, and turn boundaries are durable session events with no agent/* + // mirror to throw. A throwing `turn/end` session-event listener is already + // contained inside closeTurn (append pushes before notifying, so the + // boundary is durable). So set the error reason for closeTurn to append. + reason = { kind: 'error', step, ...errorData(err) } try { ctx.emit('agent/error', agent, turn, step, err) } catch { - // contained: the error is already captured (on `reason`, or via the logger - // above); a throwing agent/error listener must not prevent the turn from - // closing. + // contained: the error is already captured on `reason`; a throwing + // agent/error listener must not prevent the turn from closing. } } - // Close the turn exactly once (idempotent via turnEnded). `emit` is false on - // the error path (the failure was already surfaced via agent/error) and true - // on the normal/inline-error path. A throwing agent/turn-end listener on the - // normal path escapes to the outer catch, which surfaces it via failTurn — - // turn/end is already appended, so balance holds either way. - const closeTurn = (emit: boolean): void => { - if (turnEnded) return - turnEnded = true + // Close the turn. Called exactly once per turn — the normal loop exit and the + // outer catch are mutually exclusive paths, and this never throws (the append + // is contained below), so there is no re-entry to guard against (unlike + // closeStep, which the cancel branches and the outer catch can both reach). + // Turn boundaries are durable session events only — there is no agent/* turn + // emit to mirror them (see the agent event-domain rule). + const closeTurn = (): void => { // Session.append pushes turn/end BEFORE notifying session/event listeners, // so a throwing listener leaves turn/end in the log (the turn is balanced) - // but would otherwise escape — from the outer catch's closeTurn(false) it - // would propagate to the runLoop backstop, and from the normal-path - // closeTurn(true) it would skip the agent/turn-end emit. Contain it: the - // boundary is durable either way, and finalization must not abort on a bad - // listener. (On the normal path the outer catch also re-runs closeTurn, - // which is an idempotent no-op once turnEnded is set.) + // but would otherwise escape — from the outer catch it would propagate to + // the runLoop backstop. Contain it: the boundary is durable either way, and + // finalization must not abort on a bad listener. try { session.append('turn/end', { turn, reason }) } catch (error: unknown) { ctx.logger.warn(`agent "${agent.id}": session/event listener threw on turn/end at turn ${turn}: ${toError(error).message}`) } - if (emit) ctx.emit('agent/turn-end', agent, turn, reason) } try { @@ -375,13 +365,12 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, for (const message of queued) { session.append('user/message', { content: message.content, source: message.source }, { surfaceOp: 'append' }) } - ctx.emit('agent/turn-start', agent, turn) while (true) { step += 1 - // Steering from the previous round's continuation listeners (or - // turn-start listeners on the first step) joins before the request. + // Steering from the previous round's continuation listeners joins before + // the request. drainSteering(ctx, agent, turn) // The step's AbortController exists BEFORE any async pre-step work so a @@ -530,8 +519,8 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, } } - // Normal / inline-error loop exit: close the turn and notify. - closeTurn(true) + // Normal / inline-error loop exit: close the turn. + closeTurn() } catch (error: unknown) { // Decide whether this turn was ever opened from the LOG, not a flag. // Session.append pushes the event BEFORE notifying session/event listeners, @@ -550,18 +539,16 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, closeStep() // Choose the close reason. Disposal wins only if no error was already // reported: a turn disposed mid-step sets reason=disposed in the step-error - // branch (without reporting an error), and if closeTurn(true)'s turn-end - // emit then throws, we land here and must PRESERVE disposed rather than - // overwrite it with the listener's throw. Otherwise a boundary-emit throw - // on a live agent is a real failure → failTurn. (errorReported is mutated - // only inside the failTurn closure, which the analyzer can't follow, hence - // the inline lint-disable.) + // branch (without reporting an error), so preserve disposed rather than + // overwrite it. Otherwise a mid-step throw on a live agent is a real + // failure → failTurn. (errorReported is mutated only inside the failTurn + // closure, which the analyzer can't follow, hence the inline lint-disable.) if (handle.isDisposed() && !errorReported) { // eslint-disable-line @typescript-eslint/no-unnecessary-condition reason = { kind: 'disposed' } } else { failTurn(toError(error)) } - closeTurn(false) + closeTurn() } // Durability checkpoint: persistence plugins drain write-behind buffers. diff --git a/packages/core/agent-loop/tests/cancel.spec.ts b/packages/core/agent-loop/tests/cancel.spec.ts index 7950cf80a8..df94c6c503 100644 --- a/packages/core/agent-loop/tests/cancel.spec.ts +++ b/packages/core/agent-loop/tests/cancel.spec.ts @@ -117,7 +117,7 @@ describe('Agent.cancel()', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await new Promise(r => setTimeout(r, 30)) @@ -134,7 +134,7 @@ describe('Agent.cancel()', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await new Promise(r => setTimeout(r, 30)) @@ -166,22 +166,23 @@ describe('Agent.cancel()', () => { expect(reasons.length).toBe(2) }) - it('cancel from a synchronous agent/turn-start listener drops the step (step-start window)', async () => { + it('cancel from a synchronous turn/start session-event listener drops the step (step-start window)', async () => { const adapter = new MockAdapter([textResponse('should not stream')]) const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - // A turn-start listener fires BEFORE any AbortController is installed for the - // step. Cancelling there must still drop the step (the turn-scoped marker, - // not the step AbortController, is what catches this) — no model step runs. + // A turn/start listener fires right after turn/start is appended, BEFORE any + // AbortController is installed for the step. Cancelling there must still drop + // the step (the turn-scoped marker, not the step AbortController, is what + // catches this) — no model step runs. let streamed = false ctx.on('agent/stream-chunk', () => { streamed = true }) - const dispose = ctx.on('agent/turn-start', (subject) => { - if (subject === agent) agent.cancel('from turn-start') + const dispose = ctx.on('session/event', (session, event) => { + if (session === agent.session && event.type === 'turn/start') agent.cancel('from turn-start') }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -210,7 +211,7 @@ describe('Agent.cancel()', () => { }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -271,9 +272,11 @@ describe('Agent.cancel()', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) let steps = 0 - ctx.on('session/event', (_session, event) => { if (event.type === 'step/start') steps += 1 }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_session, event) => { + if (event.type === 'step/start') steps += 1 + if (event.type === 'turn/end') reasons.push(event.data.reason) + }) let continued = false ctx.on('agent/turn-continuation', async (subject, _turn, _default, next) => { diff --git a/packages/core/agent-loop/tests/coverage-edges.spec.ts b/packages/core/agent-loop/tests/coverage-edges.spec.ts index 3eefbf6986..7a044bfb57 100644 --- a/packages/core/agent-loop/tests/coverage-edges.spec.ts +++ b/packages/core/agent-loop/tests/coverage-edges.spec.ts @@ -36,69 +36,6 @@ function send(agent: ReactLoopAgent, text: string) { } describe('turn boundary listener throws (handled in-turn, loop survives)', () => { - it('a throwing agent/turn-start listener surfaces via agent/error and the loop survives', async () => { - // The agent/turn-start emit happens AFTER turn/start is appended to the log, - // so a throwing listener is handled inside runTurn (the turn is balanced and - // closed via failTurn → agent/error), NOT rethrown to the runLoop backstop. - // The second turn should proceed normally and consume the first script entry. - const adapter = new MockAdapter([textResponse('turn 2')]) - const ctx = await harness(adapter) - const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - - let threwOnce = false - ctx.on('agent/turn-start', () => { - if (!threwOnce) { - threwOnce = true - throw new Error('broken turn-start listener') - } - }) - - const errors: Error[] = [] - ctx.on('agent/error', (_agent, _turn, _step, error) => void errors.push(error)) - - send(agent, 'first') - await waitForIdle(ctx, agent) - expect(errors.map(e => e.message)).toEqual(['broken turn-start listener']) - // The turn is balanced: its turn/start was logged, so a turn/end was owed - // and appended (decided from the log, not a flag). - expect(agent.session.events.at(-1)?.type).toBe('turn/end') - - // loop survives: second turn works fine and makes the model call - send(agent, 'second') - await waitForIdle(ctx, agent) - expect(adapter.requests).toHaveLength(1) - expect(adapter.requests[0]!.messages.some(m => m.content.some(b => 'text' in b && b.text === 'second'))).toBe(true) - }) - - it('a throwing agent/turn-end listener surfaces via agent/error and the loop survives', async () => { - const adapter = new MockAdapter([textResponse('turn 1'), textResponse('turn 2')]) - const ctx = await harness(adapter) - const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - - let threwOnce = false - ctx.on('agent/turn-end', () => { - if (!threwOnce) { - threwOnce = true - throw new Error('broken turn-end listener') - } - }) - - const errors: Error[] = [] - ctx.on('agent/error', (_agent, _turn, _step, error) => void errors.push(error)) - - send(agent, 'first') - await waitForIdle(ctx, agent) - // The turn-end throw happens after the model call is complete, so turn 1's - // request is consumed. turn/end is already in the log (append pushes before - // notifying), so the turn is balanced; the error is surfaced via agent/error. - expect(errors.map(e => e.message)).toEqual(['broken turn-end listener']) - - // loop survives: second turn works fine - send(agent, 'second') - await waitForIdle(ctx, agent) - expect(adapter.requests).toHaveLength(2) - }) - it('a pre-push turn/start failure (non-serializable source) is rethrown to the runLoop backstop', async () => { // A non-serializable message source makes the turn/start append throw BEFORE // the event is pushed (Session.append validates before push), so turn/start @@ -192,14 +129,14 @@ describe('tool JSON parse', () => { }) describe('toError normalization', () => { - it('normalizes non-Error throws from turn-start listeners via toError', async () => { + it('normalizes non-Error throws from a turn/start session-event listener via toError', async () => { const adapter = new MockAdapter([textResponse('ok')]) const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) let threwOnce = false - ctx.on('agent/turn-start', () => { - if (!threwOnce) { + ctx.on('session/event', (_session, event) => { + if (event.type === 'turn/start' && !threwOnce) { threwOnce = true throw 'naked string error' // non-Error throw, normalized via toError } @@ -287,7 +224,7 @@ describe('disposed vs aborted branching', () => { }, { inject: ['agentLoop'] })) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await new Promise(r => setTimeout(r, 30)) diff --git a/packages/core/agent-loop/tests/loop.spec.ts b/packages/core/agent-loop/tests/loop.spec.ts index 311bc88fa3..f3a6da38b4 100644 --- a/packages/core/agent-loop/tests/loop.spec.ts +++ b/packages/core/agent-loop/tests/loop.spec.ts @@ -46,21 +46,20 @@ describe('agent loop', () => { const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - // Turn boundaries are live agent/* emits; step boundaries are durable - // session events only (no agent/* mirror). Interleave both feeds in fire - // order to assert the full boundary nesting. + // All boundaries — turn and step — are durable session events on the + // session/event feed (no agent/* mirror). Record them in fire order to + // assert the full boundary nesting. const order: string[] = [] - for (const name of ['agent/turn-start', 'agent/turn-end'] as const) { - ctx.on(name, () => void order.push(name)) - } ctx.on('session/event', (_session, event) => { - if (event.type === 'step/start' || event.type === 'step/end') order.push(event.type) + if (event.type === 'turn/start' || event.type === 'step/start' || event.type === 'step/end' || event.type === 'turn/end') { + order.push(event.type) + } }) send(agent, 'hi') await waitForIdle(ctx, agent) - expect(order).toEqual(['agent/turn-start', 'step/start', 'step/end', 'agent/turn-end']) + expect(order).toEqual(['turn/start', 'step/start', 'step/end', 'turn/end']) const types = agent.session.events.map(e => e.type) // turn/start opens the turn, THEN the queued user message is recorded inside @@ -436,7 +435,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') // wait until the stream is hanging, then cancel @@ -456,7 +455,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -490,7 +489,7 @@ describe('agent loop', () => { }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -512,7 +511,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'first') await waitForIdle(ctx, agent) @@ -545,7 +544,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -587,7 +586,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -606,7 +605,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -683,7 +682,7 @@ describe('agent loop', () => { const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) const turns: number[] = [] - ctx.on('agent/turn-start', (_agent, turn) => void turns.push(turn)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/start') turns.push(event.data.turn) }) // queue two messages while idle — first starts turn 1 immediately; // queue the second during turn 1 via a stream-chunk hook @@ -730,7 +729,7 @@ describe('agent loop', () => { const errors: Error[] = [] const reasons: TurnEndReason[] = [] ctx.on('agent/error', (_agent, _turn, _step, error) => void errors.push(error)) - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'hi') await waitForIdle(ctx, agent) diff --git a/packages/core/agent-loop/tests/review-fixes.spec.ts b/packages/core/agent-loop/tests/review-fixes.spec.ts index 092e63a4e5..51fdd2e146 100644 --- a/packages/core/agent-loop/tests/review-fixes.spec.ts +++ b/packages/core/agent-loop/tests/review-fixes.spec.ts @@ -1,4 +1,4 @@ -import { describe, expect, it, vi } from 'vitest' +import { describe, expect, it } from 'vitest' import { Context } from 'cordis' import LlmService, { CallId, MessageSource, StreamChunk } from '@deepseek-ai/dsh-llm' import SessionStore, { Session, SessionEvent, SessionId, TurnEndReason } from '@deepseek-ai/dsh-session' @@ -132,7 +132,7 @@ describe('HIGH: abort during tool execution ends the turn', () => { })) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -217,20 +217,21 @@ describe('HIGH: steering from late extension points is never stranded', () => { expect(JSON.stringify(adapter.requests[1]!.messages)).toContain('goal reminder from step/end') }) - it('steer() from an agent/turn-end listener becomes a queued message for the next turn', async () => { + it('steer() from a turn/end session-event listener becomes a queued message for the next turn', async () => { const adapter = new MockAdapter([textResponse('turn 1'), textResponse('turn 2')]) const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - let steeredOnce = false - ctx.on('agent/turn-end', () => { - if (steeredOnce) return - steeredOnce = true - agent.steer([{ type: 'text', text: 'too late for this turn' }]) - }) - const turns: number[] = [] - ctx.on('agent/turn-start', (_agent, turn) => void turns.push(turn)) + let steeredOnce = false + ctx.on('session/event', (subject, event) => { + if (subject !== agent.session) return + if (event.type === 'turn/start') turns.push(event.data.turn) + if (event.type === 'turn/end' && !steeredOnce) { + steeredOnce = true + agent.steer([{ type: 'text', text: 'too late for this turn' }]) + } + }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -332,7 +333,7 @@ describe('MEDIUM: disposed status is part of the agent/status contract', () => { const statuses: string[] = [] const reasons: TurnEndReason[] = [] ctx.on('agent/status', (_agent, status) => void statuses.push(status)) - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await new Promise(r => setTimeout(r, 30)) @@ -461,7 +462,7 @@ describe('MEDIUM: turn numbering continues across seeded (forked) sessions', () ctx2.effect(() => forked.start()) const turns: number[] = [] - ctx2.on('agent/turn-start', (_agent, turn) => void turns.push(turn)) + ctx2.on('session/event', (_s, event) => { if (event.type === 'turn/start') turns.push(event.data.turn) }) forked.send([{ type: 'text', text: 'continue' }]) await new Promise((resolve) => { ctx2.on('agent/status', (subject, status) => { @@ -505,7 +506,7 @@ describe('HIGH: a finish-error stream chunk ends the turn as error, not complete const agent = ctx.agentLoop.create(AgentId('a-finish-error'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -530,7 +531,7 @@ describe('HIGH: a finish-error stream chunk ends the turn as error, not complete const agent = ctx.agentLoop.create(AgentId('a-finish-aborted'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -548,7 +549,7 @@ describe('HIGH: a finish-error stream chunk ends the turn as error, not complete const agent = ctx.agentLoop.create(AgentId('a-finish-error-nocode'), { model: 'mock' }) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_agent, _turn, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await waitForIdle(ctx, agent) @@ -619,28 +620,6 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar } } - it('a throwing agent/turn-start listener still closes the turn with exactly one error and one turn/end, no step', async () => { - const adapter = new MockAdapter([textResponse('never reached')]) - const ctx = await balancedHarness(adapter) - const agent = ctx.agentLoop.create(AgentId('a-turnstart'), { model: 'mock' }) - - let threw = false - ctx.on('agent/turn-start', () => { if (!threw) { threw = true; throw new Error('boom turn-start') } }) - const errors: Error[] = [] - ctx.on('agent/error', (_a, _t, _s, error) => void errors.push(error)) - - send(agent, 'go') - await waitForIdle(ctx, agent) - - const c = boundaryCounts(agent) - // turn opened and closed; no step ran; exactly one error turn-end + emitted. - expect(c).toMatchObject({ turnStart: 1, turnEnd: 1, stepStart: 0, stepEnd: 0, errors: 1 }) - expect(errors.map(e => e.message)).toEqual(['boom turn-start']) - expect(c.lastTurnEnd?.type === 'turn/end' && c.lastTurnEnd.data.reason).toEqual({ kind: 'error', step: 0, message: 'boom turn-start' }) - // model was never called (we threw before the step's request). - expect(adapter.requests).toHaveLength(0) - }) - it('a throwing step/start session-event listener closes the open step then the turn (step/end before turn/end)', async () => { const adapter = new MockAdapter([textResponse('never reached')]) const ctx = await balancedHarness(adapter) @@ -720,7 +699,7 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar }, { inject: ['agentLoop'] })) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await new Promise(r => setTimeout(r, 30)) @@ -737,46 +716,46 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar expect(e.some(x => x.type === 'turn/end' && x.data.reason.kind === 'error')).toBe(false) }) - it('preserves reason disposed when the turn-end emit throws during disposal (outer-catch disposed branch)', async () => { - // Dispose mid-step → the step-error branch sets reason=disposed (no error - // reported). closeTurn(true) then emits agent/turn-end, whose listener - // throws → control reaches the outer catch with isDisposed() && !errorReported, - // which must PRESERVE disposed rather than overwrite it with the listener's - // throw. This is the only path that exercises that catch sub-branch. - const adapter = new MockAdapter(['hang']) + it('preserves reason disposed when a pre-step listener disposes then throws (outer-catch disposed branch)', async () => { + // Reach the OUTER catch while disposed: an `agent/pre-step` listener requests + // disposal AND throws. The throw escapes the pre-step `await` (line ~419) to + // the loop's outer catch — BEFORE the post-pre-step disposal check at ~422 + // gets to run — so the catch sees `isDisposed() && !errorReported` and must + // PRESERVE reason=disposed rather than overwrite it with the listener's throw + // (disposal is not a failure). This is the surviving path to that sub-branch + // now that there is no turn-boundary emit to throw from. + const adapter = new MockAdapter([textResponse('never reached')]) const ctx = await balancedHarness(adapter) let agent!: ReactLoopAgent const fiber = await ctx.plugin(Object.assign((inner: Context) => { - agent = inner.agentLoop.create(AgentId('a-dispose-emit-throw'), { model: 'mock' }) + agent = inner.agentLoop.create(AgentId('a-prestep-dispose-throw'), { model: 'mock' }) }, { inject: ['agentLoop'] })) - // The FIRST agent/turn-end emit throws (the disposal-driven turn end). let threw = false - ctx.on('agent/turn-end', () => { if (!threw) { threw = true; throw new Error('boom turn-end during disposal') } }) - // Collect agent/error emissions to prove none is surfaced through that - // channel either (the listener throw must be fully contained). + ctx.on('agent/pre-step', () => { + if (threw) return + threw = true + // Request disposal, then throw in the same synchronous tick: status flips + // to 'disposed' (the disposer aborts the step controller) and the throw + // drives control into the outer catch with isDisposed() already true. + void fiber.dispose() + throw new Error('boom pre-step during disposal') + }) const errorEmits: Error[] = [] ctx.on('agent/error', (_a, _t, _s, error) => void errorEmits.push(error)) send(agent, 'go') - await new Promise(r => setTimeout(r, 30)) - await fiber.dispose() // dispose during the hanging step await agent.done - // The throwing turn-end listener actually fired — proving the outer-catch - // path was exercised, not skipped. - expect(threw).toBe(true) - const e = [...agent.session.events] - // Exactly one turn/start and one turn/end (balanced); the turn/end carries - // the disposed reason, NOT an error reason from the throwing listener. + // Balanced: one turn/start, one turn/end carrying disposed (NOT error). expect(e.filter(x => x.type === 'turn/start')).toHaveLength(1) const turnEnd = e.findLast(x => x.type === 'turn/end') expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason).toEqual({ kind: 'disposed' }) - // The throwing turn-end listener is contained: the turn/end carries the - // disposed reason (not an error) and no agent/error is emitted (disposal is - // not a failure; the throw is swallowed). expect(e.some(x => x.type === 'turn/end' && x.data.reason.kind === 'error')).toBe(false) + // No step opened (the throw was before step/start) and disposal is not a + // failure, so no agent/error for the contained throw. + expect(e.some(x => x.type === 'step/start')).toBe(false) expect(errorEmits).toHaveLength(0) }) @@ -822,43 +801,6 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar expect(adapter.requests).toHaveLength(1) }) - it('a throwing turn-end listener on a SUCCESSFUL turn leaves no event after turn/end (loadable log)', async () => { - // Regression: a normal turn completes, closeTurn(true) appends turn/end and - // emits agent/turn-end whose listener throws. The error must NOT be appended - // as a session event after turn/end — that would sit past the commit - // boundary and be dropped as a crash tail on resume (the turn-enclosure RFC). It is - // surfaced via agent/error instead, and the log's last event is turn/end. - const adapter = new MockAdapter([textResponse('done'), textResponse('next ok')]) - const ctx = await balancedHarness(adapter) - const agent = ctx.agentLoop.create(AgentId('a-tend'), { model: 'mock' }) - - let threw = false - ctx.on('agent/turn-end', () => { if (!threw) { threw = true; throw new Error('boom turn-end') } }) - const errors: Error[] = [] - ctx.on('agent/error', (_a, _t, _s, error) => void errors.push(error)) - const warn = vi.spyOn(ctx.logger, 'warn').mockImplementation(() => undefined) - - send(agent, 'go') - await waitForIdle(ctx, agent) - - const c = boundaryCounts(agent) - expect(c.turnEnd).toBe(1) - expect(c.errors).toBe(0) // NO session error event (it would be post-turn/end) - expect(agent.session.events.at(-1)?.type).toBe('turn/end') // last event is the boundary - expect(errors.map(e => e.message)).toEqual(['boom turn-end']) // surfaced via agent/error - // The late throw is also logged directly: failTurn's turn-already-ended - // branch warns so a throwing turn-end listener after turn/end never vanishes. - expect(warn).toHaveBeenCalledWith(expect.stringContaining('agent/turn-end listener threw after turn 1 closed')) - // The whole log is loadable (nothing dropped): a fresh replay sees the turn. - const replay = new Session(SessionId('replay'), [...agent.session.events]) - expect(replay.deriveMessages().map(m => m.role)).toEqual(['user', 'assistant']) - - // loop survives. - send(agent, 'again') - await waitForIdle(ctx, agent) - expect(boundaryCounts(agent).turnEnd).toBe(2) - }) - it('a throwing step/end session-event listener during a successful step ends the turn as error, not completed', async () => { // closeStep() must surface a throwing step/end listener via failTurn so the // turn ends with reason error, not a silent "completed" with the throw @@ -902,39 +844,6 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar expect(c2.stepStart).toBe(c2.stepEnd) }) - it('a step error followed by a throwing turn-end listener logs the error exactly once (no double-report)', async () => { - // The step fails (finish-error) → failTurn records ONE error and sets the - // error reason. closeTurn(true) then appends turn/end and emits - // agent/turn-end, whose listener throws → the outer catch calls failTurn - // again, but its errorReported guard makes it a no-op. Trap #1: exactly one - // error, the turn stays balanced. - const errorStream: StreamChunk[] = [{ type: 'finish', reason: { kind: 'error', message: 'provider down' } }] - const adapter = new MockAdapter([errorStream, textResponse('turn 2 ok')]) - const ctx = await balancedHarness(adapter) - const agent = ctx.agentLoop.create(AgentId('a-double'), { model: 'mock' }) - - let threw = false - ctx.on('agent/turn-end', () => { if (!threw) { threw = true; throw new Error('boom turn-end') } }) - const errors: Error[] = [] - ctx.on('agent/error', (_a, _t, _s, error) => void errors.push(error)) - - send(agent, 'go') - await waitForIdle(ctx, agent) - - const c = boundaryCounts(agent) - // exactly one error turn-end + one agent/error emit, despite two failTurn calls. - expect(c.errors).toBe(1) - expect(errors.map(e => e.message)).toEqual(['provider down']) - expect(c.turnStart).toBe(1) - expect(c.turnEnd).toBe(1) // single turn/end, balanced - expect(c.lastTurnEnd?.type === 'turn/end' && c.lastTurnEnd.data.reason).toMatchObject({ kind: 'error', step: 1, message: 'provider down' }) - - // loop survives the compound failure. - send(agent, 'again') - await waitForIdle(ctx, agent) - expect(boundaryCounts(agent).turnEnd).toBe(2) - }) - it('a throwing session/event listener on step/end during finalization still appends turn/end', async () => { // A finish-error stream opens a step then fails it, driving finalization // through closeStep() with the step open. closeStep appends step/end; a @@ -974,11 +883,10 @@ describe('P1-5: a started turn (and any open step) is always closed on a boundar it('a throwing session/event listener on turn/end is contained (turn still balanced, loop survives)', async () => { // closeTurn appends turn/end; Session.append pushes it BEFORE notifying // session/event listeners, so a throwing listener leaves turn/end in the log - // (the turn is balanced) but must not escape — from the normal-path - // closeTurn(true) it would otherwise propagate; the append is contained so - // the turn/end emit + loop continue. (A throwing agent/turn-end LISTENER is - // a separate, already-tested path; here the session/event append notify is - // what throws.) + // (the turn is balanced) but must not escape — from the normal-path closeTurn + // it would otherwise propagate; the append is contained so the loop continues. + // Turn boundaries are durable session events only (no agent/* mirror), so this + // session/event append-notify throw is the sole turn-end-listener failure path. const adapter = new MockAdapter([textResponse('turn 1'), textResponse('turn 2')]) const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a-turnendappend'), { model: 'mock' }) @@ -1117,7 +1025,7 @@ describe('disposal/cancel honored during pre-step assembly (P1-1)', () => { }, { inject: ['agentLoop'] })) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') // Give the loop time to enter the step and reach assemble(). @@ -1143,10 +1051,8 @@ describe('disposal/cancel honored during pre-step assembly (P1-1)', () => { // No step was opened, no LLM call was made. expect(e.some(x => x.type === 'step/start')).toBe(false) expect(e.some(x => x.type === 'assistant/chunk')).toBe(false) - // agent/turn-end may not fire when disposal happens during assembly: the - // fiber's disposer (stop→status=disposed) runs before closeTurn(true)'s - // emit, and the LIFO chain disposes effects in reverse registration order. - // The turn/end durable record is the one that matters. + // The durable turn/end record is the authoritative turn-boundary signal + // (turn boundaries have no agent/* mirror), so this asserts on the log. }) it('cancel during system-prompt assembly drops the about-to-start step as aborted', { timeout: 30000 }, async () => { @@ -1175,7 +1081,7 @@ describe('disposal/cancel honored during pre-step assembly (P1-1)', () => { }, { inject: ['agentLoop'] })) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await new Promise(r => setTimeout(r, 50)) @@ -1230,7 +1136,7 @@ describe('disposal/cancel honored during pre-step assembly (P1-1)', () => { }, { inject: ['agentLoop'] })) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await new Promise(r => setTimeout(r, 50)) @@ -1251,9 +1157,8 @@ describe('disposal/cancel honored during pre-step assembly (P1-1)', () => { expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason).toEqual({ kind: 'disposed' }) expect(e.some(x => x.type === 'step/start')).toBe(false) expect(e.some(x => x.type === 'assistant/chunk')).toBe(false) - // agent/turn-end may not fire when disposal happens during pre-step: the - // fiber's disposer runs before closeTurn(true)'s emit. The durable turn/end - // is the authoritative record. + // The durable turn/end record is the authoritative turn-boundary signal + // (turn boundaries have no agent/* mirror). }) it('cancel during agent/pre-step seam ends the turn aborted', { timeout: 15000 }, async () => { @@ -1283,7 +1188,7 @@ describe('disposal/cancel honored during pre-step assembly (P1-1)', () => { }, { inject: ['agentLoop'] })) const reasons: TurnEndReason[] = [] - ctx.on('agent/turn-end', (_a, _t, reason) => void reasons.push(reason)) + ctx.on('session/event', (_s, event) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) send(agent, 'go') await new Promise(r => setTimeout(r, 30)) @@ -1348,7 +1253,7 @@ describe('disposal/cancel honored during pre-step assembly (P1-1)', () => { expect(e.some(x => x.type === 'assistant/chunk')).toBe(false) expect(e.some(x => x.type === 'assistant/message')).toBe(false) expect(adapter.requests).toHaveLength(0) - // The durable turn/end reason is the authoritative record; agent/turn-end - // may not fire when disposal interleaves with closeTurn(true)'s emit. + // The durable turn/end reason is the authoritative turn-boundary record + // (turn boundaries have no agent/* mirror). }) }) diff --git a/packages/core/agent/README.md b/packages/core/agent/README.md index 594ae06ef0..a27d7f8d57 100644 --- a/packages/core/agent/README.md +++ b/packages/core/agent/README.md @@ -32,11 +32,9 @@ The full `agent/*` event taxonomy is declared via declaration merging in `dsh-ag - `agent/status` — idle / running / disposed transition - `agent/queued` — message entered inbox (source-resolved, steering flag) -#### Turn boundaries (emit) +#### Boundaries are durable session events, not `agent/*` emits -- `agent/turn-start`, `agent/turn-end` (carries `TurnEndReason`) - -Step boundaries are NOT mirrored as `agent/*` emits: a consumer that needs per-step boundaries reads the durable `step/start`/`step/end` session events (the session log is the live boundary feed). The turn boundaries stay as `agent/*` emits because the stdio UI needs the `Agent` handle (`agent.id`) at the boundary, which the session event does not carry. See [the event-domain-semantics RFC](../../../docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md). +Turn and step boundaries are NOT mirrored as `agent/*` emits: a consumer that needs them reads the durable `turn/start`/`turn/end`/`step/start`/`step/end` events off the `session/event` feed (the session log is the live boundary feed, carrying the `Session` — the turn/step numbers and reasons ride on the event data). See [the event-domain-semantics RFC](../../../docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md) and [the remove-boundary-mirror-events RFC](../../../docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md). #### Interception seams diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts index 82682ef856..0dcc1d0501 100644 --- a/packages/core/agent/src/types.ts +++ b/packages/core/agent/src/types.ts @@ -26,13 +26,12 @@ * * **The rule:** a durable, replayable fact is a SessionEvent; a live * interception or a transient/live-object signal is an `agent`/`tools` Cordis - * event. A datum that is BOTH (a turn/step boundary) lives in the session log, - * and is mirrored as an `agent/*` emit ONLY where a live consumer provably - * needs the `Agent` handle at that instant. Turn boundaries are so mirrored - * (the stdio UI labels output by `agent.id`); step boundaries are NOT (no live - * consumer needs them — read `step/start`/`step/end` from the session log). + * event. A turn/step boundary is a durable fact: it lives in the session log + * and is read off the `session/event` feed — it is NOT mirrored as an `agent/*` + * emit. A consumer that needs the `Agent` handle (or its short id) at a boundary + * keeps a session-id→agent map from `agent/created`/`agent/disposed`. * See `docs/rfc/implemented/architecture/2026-06-11-microkernel-event-taxonomy.md` - * and the related `docs/rfc/proposed/simplification/2026-06-20-remove-agent-boundary-mirror-events.md`. + * and `docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md`. * * @module @deepseek-ai/dsh-agent/types */ @@ -47,7 +46,7 @@ export type AgentId = Branded<'AgentId'> export function AgentId(id: string): AgentId { return id as AgentId } -import type { Session, TurnEndReason } from '@deepseek-ai/dsh-session' +import type { Session } from '@deepseek-ai/dsh-session' /** * Options an agent is created with. @@ -183,26 +182,11 @@ declare module 'cordis' { */ 'agent/queued'(agent: Agent, content: ContentBlock[], info: { source: MessageSource; steering: boolean }): void - // ---- turn boundaries (emit) — the live boundary surface ---- - // Step boundaries are NOT mirrored here: a consumer that needs per-step - // boundaries reads the durable `step/start`/`step/end` session events (the - // session log is the live transcript feed). The TURN boundaries stay as - // agent/* emits because the only live consumer (the stdio UI) needs the - // `Agent` handle at the boundary to label output, which the session event - // does not carry. See the module doc's three-domain rule. - /** - * A turn began. `turn` is the 1-based turn number within the session. - * @mode emit - */ - 'agent/turn-start'(agent: Agent, turn: number): void - /** - * A turn ended. `reason` distinguishes a clean stop from a truncated, - * aborted, failed, disposed, or crash-interrupted one (`completed` | - * `aborted` | `error` | `disposed` | `max-tokens` | `interrupted`); the - * reason union is merge-extensible, so a plugin can add further variants. - * @mode emit - */ - 'agent/turn-end'(agent: Agent, turn: number, reason: TurnEndReason): void + // Turn and step boundaries are NOT mirrored as agent/* emits: a consumer + // that needs them reads the durable `turn/start`/`turn/end`/`step/start`/ + // `step/end` session events off the `session/event` feed (the session log is + // the live transcript feed). See the module doc's three-domain rule and the + // "remove agent boundary mirror events" RFC. // ---- step/request extension seams (serial + waterfall) ---- /** diff --git a/packages/support/ui-stdio/README.md b/packages/support/ui-stdio/README.md index b65fd4d8e1..25f53833b7 100644 --- a/packages/support/ui-stdio/README.md +++ b/packages/support/ui-stdio/README.md @@ -1,6 +1,8 @@ # @deepseek-ai/dsh-ui-stdio -A minimal stdio (readline) UI, as a plugin. It reads lines from stdin and feeds them to an agent (`send` when idle, `steer` while a turn is running), and renders that agent's streamed output and tool activity to stdout. A UI is "just a plugin" here — it only consumes the `agent/*` event taxonomy plus the `agents` service (`inject: ['agents']`), so the same plugin drives any example or product surface. +A minimal stdio (readline) UI, as a plugin. It reads lines from stdin and feeds them to an agent (`send` when idle, `steer` while a turn is running), and renders that agent's streamed output and tool activity to stdout. A UI is "just a plugin" here — it consumes the `session/event` transcript feed plus a few `agent/*` control events (`agent/stream-chunk`, `agent/status`, `agent/created`/`agent/disposed`) and the `agents` service (`inject: ['agents']`), so the same plugin drives any example or product surface. + +This is a **convenience REPL for local testing and the demos, not a product surface** — its observable behavior is free to change. It is deliberately NOT treated as a load-bearing consumer when weighing whether a live event/API must exist: the boundary mirror events were removed precisely because "ui-stdio renders from them" is not a product constraint (it was migrated to `session/event`). The real product surfaces are the ACP bridge (`dsh-acp`) and the app packages. This package consolidates what were two near-identical copies under `examples/echo-agent` and `examples/coding-agent`. The coding copy was a superset; this package IS that superset — dimmed chain-of-thought rendering plus robust piped-stdin EOF handling — with the per-consumer differences moved into `Config`. @@ -23,8 +25,7 @@ This package consolidates what were two near-identical copies under `examples/ec Rendering is **global** — every agent's events are written to stdout, not just `config.agent`'s. `config.agent` scopes only *input* (which agent stdin drives) and the EOF-exit gate; the single-agent demos this serves have just one agent, so the distinction is moot for them. (A multi-agent UI that needs per-agent panes would filter these handlers by the agent argument — deliberately out of scope here.) - `agent/stream-chunk` — `text-delta` is written verbatim; `reasoning-delta` is wrapped in the dim SGR (`\x1B[2m … \x1B[0m`) so the chain-of-thought is visually subordinate to the answer. Reasoning rendering is inert when no `reasoning-delta` chunks arrive (e.g. a mock model), so it is always on. -- `agent/turn-start` / `agent/turn-end` — a `[ turn N]` header and a trailing `> ` prompt. -- `session/event` — `tool/call` renders `[tool call] name(args)`; `tool/result` renders the joined text blocks as `[tool result] …`. +- `session/event` — the durable transcript feed drives all boundary and content rendering: `turn/start` prints a `[ turn N]` header (the short agent label comes from an `agent/created`→id map, since the turn event carries only the turn number), `turn/end` prints the trailing `> ` prompt, `tool/call` renders `[tool call] name(args)`, `tool/result` renders the joined text blocks as `[tool result] …`, and `todo/write` renders a glyphed checklist. ## The I/O seam diff --git a/packages/support/ui-stdio/src/index.ts b/packages/support/ui-stdio/src/index.ts index edfa82285e..5f3b2bdc1c 100644 --- a/packages/support/ui-stdio/src/index.ts +++ b/packages/support/ui-stdio/src/index.ts @@ -76,6 +76,15 @@ export function createStdioChat(ctx: Context, config: Config, runtime: StdioRunt const agentId = AgentId(config.agent ?? 'main') const { input, output, exit } = runtime + // Render label lookup: the `turn/start` session event carries only the turn + // number, so to print the short agent id (`[main turn 1]`) we map the + // session's id to its agent's id. The session id is not reliably the agent id + // (a session can be created with an explicit/client-supplied id), so build the + // map from `agent/created` rather than parsing the id string. + const labelBySession = new Map() + ctx.on('agent/created', (agent) => { labelBySession.set(agent.session.header.id, agent.id) }) + ctx.on('agent/disposed', (agent) => { labelBySession.delete(agent.session.header.id) }) + let inReasoning = false ctx.on('agent/stream-chunk', (_agent, _turn, _step, chunk) => { if (chunk.type === 'reasoning-delta') { @@ -90,18 +99,18 @@ export function createStdioChat(ctx: Context, config: Config, runtime: StdioRunt } }) - ctx.on('agent/turn-start', (agent, turn) => { - output.write(`\n[${agent.id} turn ${turn}] `) - }) - - ctx.on('agent/turn-end', () => { - if (inReasoning) output.write('\x1B[0m') - inReasoning = false - output.write('\n> ') - }) - - ctx.on('session/event', (_session, event) => { - if (event.type === 'tool/call') { + // Transcript rendering off the durable `session/event` feed — turn/step + // boundaries, tool activity, and todos all come from the one canonical stream + // (no agent/* boundary mirrors). + ctx.on('session/event', (session, event) => { + if (event.type === 'turn/start') { + const label = labelBySession.get(session.header.id) ?? session.header.id + output.write(`\n[${label} turn ${event.data.turn}] `) + } else if (event.type === 'turn/end') { + if (inReasoning) output.write('\x1B[0m') + inReasoning = false + output.write('\n> ') + } else if (event.type === 'tool/call') { const { name: toolName, arguments: args } = event.data if (inReasoning) output.write('\x1B[0m') inReasoning = false diff --git a/packages/support/ui-stdio/tests/ui-stdio.spec.ts b/packages/support/ui-stdio/tests/ui-stdio.spec.ts index 7bd1fd4868..0c58211d82 100644 --- a/packages/support/ui-stdio/tests/ui-stdio.spec.ts +++ b/packages/support/ui-stdio/tests/ui-stdio.spec.ts @@ -56,11 +56,19 @@ function makeAgent(id: string, status: AgentStatus = 'idle'): Agent & { status, sent, steered, + // A minimal session stub: the UI reads only `session.header.id` (to map the + // session back to its agent id for the turn-boundary label). + session: { header: { id: `${id}-session` } }, send: (content: ContentBlock[]) => void sent.push(content), steer: (content: ContentBlock[]) => void steered.push(content), } as never } +/** A session stub whose `header.id` matches an agent's, for `session/event` emits. */ +function makeSession(agentId: string): Session { + return { header: { id: `${agentId}-session` } } as Session +} + const CONFIG: Config = { welcome: 'hi there', agent: 'main' } async function setup(config: Config = CONFIG, runtimeOver: Partial = {}) { @@ -116,23 +124,54 @@ describe('createStdioChat rendering', () => { expect(out.text()).toBe(before) }) - it('renders turn-start and turn-end markers', async () => { + it('renders turn/start and turn/end markers from the session feed', async () => { const { ctx, out } = await setup() const agent = makeAgent('main') - ctx.emit('agent/turn-start', agent, 3) + // agent/created populates the session-id → agent-id label map. + ctx.emit('agent/created', agent) + const session = makeSession('main') + ctx.emit('session/event', session, { + type: 'turn/start', seq: 1, time: 0, data: { turn: 3, trigger: { kind: 'message' } }, + } as SessionEvent) expect(out.text()).toContain('[main turn 3] ') - ctx.emit('agent/turn-end', agent, 3, { kind: 'completed' }) + ctx.emit('session/event', session, { + type: 'turn/end', seq: 2, time: 0, data: { turn: 3, reason: { kind: 'completed' } }, + } as SessionEvent) expect(out.text()).toContain('\n> ') }) - it('resets dim styling at turn-end if a turn ends mid-reasoning', async () => { + it('falls back to the session id as the label when no agent is mapped', async () => { + const { ctx, out } = await setup() + // No agent/created emitted, so the label map is empty — the header id shows. + ctx.emit('session/event', makeSession('orphan'), { + type: 'turn/start', seq: 1, time: 0, data: { turn: 1, trigger: { kind: 'message' } }, + } as SessionEvent) + expect(out.text()).toContain('[orphan-session turn 1] ') + }) + + it('resets dim styling at turn/end if a turn ends mid-reasoning', async () => { const { ctx, out } = await setup() const agent = makeAgent('main') ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'reasoning-delta', index: 0, text: 'mid' }) - ctx.emit('agent/turn-end', agent, 1, { kind: 'completed' }) + ctx.emit('session/event', makeSession('main'), { + type: 'turn/end', seq: 1, time: 0, data: { turn: 1, reason: { kind: 'completed' } }, + } as SessionEvent) expect(out.text()).toContain('\x1B[2mmid\x1B[0m') }) + it('drops the label mapping on agent/disposed', async () => { + const { ctx, out } = await setup() + const agent = makeAgent('main') + ctx.emit('agent/created', agent) + ctx.emit('agent/disposed', agent) + // After disposal the map no longer resolves the agent id — fall back to the + // session header id. + ctx.emit('session/event', makeSession('main'), { + type: 'turn/start', seq: 1, time: 0, data: { turn: 1, trigger: { kind: 'message' } }, + } as SessionEvent) + expect(out.text()).toContain('[main-session turn 1] ') + }) + it('renders tool/call and tool/result session events', async () => { const { ctx, out } = await setup() const session = {} as Session @@ -196,7 +235,8 @@ describe('createStdioChat rendering', () => { const { ctx, out } = await setup() const before = out.text() ctx.emit('session/event', {} as Session, { - type: 'turn/start', seq: 1, time: 0, data: { turn: 1, trigger: { kind: 'continuation' } }, + type: 'user/message', seq: 1, time: 0, + data: { content: [{ type: 'text', text: 'hi' }], source: { kind: 'user' } }, } as SessionEvent) expect(out.text()).toBe(before) }) diff --git a/packages/ui/acp/README.md b/packages/ui/acp/README.md index ad50383542..3f3fe967d0 100644 --- a/packages/ui/acp/README.md +++ b/packages/ui/acp/README.md @@ -57,7 +57,7 @@ When the client does NOT advertise the capability, none of the `_meta`/terminal ## Settle-exactly-once -A `session/prompt` resolves (or rejects) exactly once, keyed off the canonical session log (the `session/event` stream), NOT the `agent/turn-start`/`agent/turn-end` events. One listener captures the prompt's owning turn from the log's `turn/start` and settles on the matching `turn/end` — the one signal that always fires (`closeTurn` appends it unconditionally, even when a boundary emit throws and the `agent/turn-end` EVENT is skipped). A prompt settles only on ITS OWN turn (`inflight.turn === turn/end.turn`), so a stale `turn/end` for a previously-cancelled turn whose end arrives late can never settle the wrong prompt. A turn that ends `error` REJECTS the RPC with an internal error carrying the failure message (ACP has no error stop reason); every other reason resolves via the codec. As a fallback, when the agent settles to `idle`/`disposed` with a prompt still pending — e.g. a `session/event` listener registered before the bridge threw and starved the bridge's listener — an `agent/status` handler reconciles the prompt from the log (the owning turn's `turn/end`, or `cancelled` if the turn was torn down without one). An empty/whitespace prompt is rejected up front — it would queue no work, so no turn would start and the RPC would hang. +A `session/prompt` resolves (or rejects) exactly once, keyed off the canonical session log (the `session/event` stream). One listener captures the prompt's owning turn from the log's `turn/start` and settles on the matching `turn/end` — the durable boundary event (`closeTurn` appends it unconditionally; there is no `agent/*` turn mirror). A prompt settles only on ITS OWN turn (`inflight.turn === turn/end.turn`), so a stale `turn/end` for a previously-cancelled turn whose end arrives late can never settle the wrong prompt. A turn that ends `error` REJECTS the RPC with an internal error carrying the failure message (ACP has no error stop reason); every other reason resolves via the codec. As a fallback, when the agent settles to `idle`/`disposed` with a prompt still pending — e.g. a peer `session/event` listener registered before the bridge threw and starved the bridge's listener — an `agent/status` handler reconciles the prompt from the log (the owning turn's `turn/end`, or `cancelled` if the turn was torn down without one). An empty/whitespace prompt is rejected up front — it would queue no work, so no turn would start and the RPC would hang. ## Disposal & disconnect diff --git a/packages/ui/acp/src/index.ts b/packages/ui/acp/src/index.ts index 754b1750be..3fab77a150 100644 --- a/packages/ui/acp/src/index.ts +++ b/packages/ui/acp/src/index.ts @@ -199,13 +199,14 @@ interface SessionRecord { } /** - * Drive the in-flight prompt's settle from the harness event stream. A turn - * can end three ways the bridge must all handle (AGENTS.md "honor cross-seam - * contracts on BOTH sides"): the normal `agent/turn-end` event; a `turn/end` - * session event WITHOUT the agent event (a boundary emit threw inside the loop, - * which still appends `turn/end`); or the agent erroring/settling to idle. The - * first of these to fire settles the prompt; `settle` is then cleared so the - * others are no-ops (settle-exactly-once). + * Drive the in-flight prompt's settle from the harness event stream. The bridge + * settles off the durable log: the `turn/end` session event on the + * `session/event` feed for the prompt's own turn, with the agent + * erroring/settling to idle as a fallback (AGENTS.md "honor cross-seam contracts + * on BOTH sides") for the case where a throwing peer `session/event` listener + * starved the bridge's listener before it saw the boundary. The first of these + * to fire settles the prompt; `settle` is then cleared so the others are no-ops + * (settle-exactly-once). */ export function apply(ctx: Context, config: AcpConfig): void { // TODO(double-default): these literals duplicate the Config schema defaults @@ -318,15 +319,14 @@ export function apply(ctx: Context, config: AcpConfig): void { // the canonical log: every assistant/chunk and tool/call/result is logged, so // translating from the log makes live streaming and `session/load` replay // share the identical path (streamSessionEventUpdate). Both the owning-turn - // capture and the settle key off the log's own `turn/start`/`turn/end` — NOT - // the `agent/turn-start`/`agent/turn-end` EVENTS, which a throwing PEER - // listener (cordis `emit` stops at the first throw) or a boundary-emit failure - // can skip. `closeTurn` appends `turn/end` to the log unconditionally, and - // `turn/start` is appended before any step runs, so within this one listener - // we always see the prompt's turn-start (tag `inflight.turn`) then its - // turn-end (settle). A `turn/end` settles the prompt ONLY when it is the - // prompt's OWN turn (`inflight.turn === event.data.turn`) — a previous, - // already-cancelled turn whose end arrives late is ignored (see + // capture and the settle key off the log's own `turn/start`/`turn/end` — the + // durable boundary events (there is no agent/* turn mirror). `closeTurn` + // appends `turn/end` to the log unconditionally, and `turn/start` is appended + // before any step runs, so within this one listener we always see the + // prompt's turn-start (tag `inflight.turn`) then its turn-end (settle). A + // `turn/end` settles the prompt ONLY when it is the prompt's OWN turn + // (`inflight.turn === event.data.turn`) — a previous, already-cancelled turn + // whose end arrives late is ignored (see // SessionRecord.inflight). A turn that ends `error` REJECTS the prompt (ACP // has no error stop reason); other reasons resolve via the codec. Demux // strictly by session id: a `session/event` is routed to its own record, so From 9e575a2a2cc016c30aee0a9225c858269ea9e31a Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 03:47:37 +0800 Subject: [PATCH 27/47] docs(events): fix stale turn-mirror references caught in review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex review of the turn-mirror removal found current-state docs/comments that still claimed the removed `agent/turn-start`/`agent/turn-end` events exist: - docs/architecture.md: the loop diagram's turn-start line still said "emit agent/turn-start" (the turn-end line was already fixed). - event-domain-semantics RFC: the `agent/*` domain description listed "the turn boundaries" among the transient emits. - docs/core-data-structures/core.md: the agent/* taxonomy blurb listed "turn/step boundaries" as agent events. - the proposed ACP RFC: the settle-signal rows named agent/turn-start / agent/turn-end; retargeted to the durable `turn/end` session event + the session/event owning-turn correlation. - loop.ts outer-catch comment: said "closeTurn/failTurn are idempotent" — after the emit-param removal closeTurn is called exactly once (mutually exclusive normal/catch paths), so corrected to state that and to scope idempotency to closeStep (which is still guarded by stepOpen). Regenerated the cordis catalog. No behavior change. --- docs/architecture.md | 2 +- docs/core-data-structures/core.md | 2 +- .../2026-06-30-event-domain-semantics.md | 2 +- .../feature/2026-06-14-acp-agent-client-protocol.md | 4 ++-- packages/core/agent-loop/src/loop.ts | 13 ++++++++----- 5 files changed, 13 insertions(+), 10 deletions(-) diff --git a/docs/architecture.md b/docs/architecture.md index 8f83625ab0..4e856305ec 100644 --- a/docs/architecture.md +++ b/docs/architecture.md @@ -134,7 +134,7 @@ forever: wait for queued messages (idle) emit agent/status(running) TURN (error-contained — a throwing plugin ends the turn, never the loop): - drain queued → 'turn/start' → session('user/message'…) → emit agent/turn-start + drain queued → 'turn/start' → session('user/message'…) ⟵ durable turn boundary (no agent/* mirror) STEP loop: drain steering (late steering from previous step's listeners) assembly = ctx.systemPrompt.assemble() ⟵ waterfall system-prompt/assemble diff --git a/docs/core-data-structures/core.md b/docs/core-data-structures/core.md index 34cf410944..7466b063eb 100644 --- a/docs/core-data-structures/core.md +++ b/docs/core-data-structures/core.md @@ -306,7 +306,7 @@ interface Agent { } ``` -`AgentStatus` is `'idle' | 'running' | 'disposed'`. `AgentId` is a branded string. `AgentOptions` (`model?`, `systemPrompt?`) is merge-extensible — plugins add creation options by declaration merging. The `agent/*` event taxonomy (lifecycle, turn/step boundaries, the serial `agent/pre-step` surface-mutation seam, and the `agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls) is in [architecture.md § Event taxonomy](../architecture.md#event-taxonomy). +`AgentStatus` is `'idle' | 'running' | 'disposed'`. `AgentId` is a branded string. `AgentOptions` (`model?`, `systemPrompt?`) is merge-extensible — plugins add creation options by declaration merging. The `agent/*` event taxonomy (lifecycle emits, the serial `agent/pre-step` surface-mutation seam, and the `agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls) is in [architecture.md § Event taxonomy](../architecture.md#event-taxonomy); turn/step boundaries are durable `session/event` records, not `agent/*` emits. ## `ToolDefinition` diff --git a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md index 5ca6f874b5..7ae254f8dc 100644 --- a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md +++ b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md @@ -19,7 +19,7 @@ This is the foundational change in a stack that adds a Hooks subsystem; it estab **Three domains, one job each, with a single boundary rule.** - **`session/*` — the durable, replayable FACT log.** Owns `SessionEventMap`; every entry is JSON-only (no live objects). One `session/event` emit per append, plus the `session/flush` parallel durability checkpoint. It is also the live transcript feed: a consumer that wants to render or react to what happened subscribes here, so live rendering and `session/load` replay share one path. -- **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/stream-chunk`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`, and the turn boundaries) that notify with the `Agent` in hand. +- **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/stream-chunk`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`) that notify with the `Agent` in hand. Turn and step BOUNDARIES are NOT here — they are durable session events read off `session/event`. - **`tools/*` — the tool registry + execution seam.** **The boundary rule:** a durable, replayable fact is a `SessionEvent`; a live interception or a transient/live-object signal is an `agent`/`tools` Cordis event. A turn or step boundary is a durable fact, so it lives in the session log and is read off the `session/event` feed — it is NOT mirrored as an `agent/*` emit. diff --git a/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md b/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md index 675e295c2c..0aa5af4dc4 100644 --- a/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md +++ b/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md @@ -27,7 +27,7 @@ The mapping between ACP and existing harness seams — each row names the seam a | `session/new {cwd, mcpServers, additionalDirectories}` → `{sessionId}` | the `dsh-agent` create factory (see Dependency note + Plan) | the seam must accept `{ sessionId, meta }` so the ACP-generated `sessionId` becomes the live/persisted session id and the validated `cwd` is attached as the `SessionHeader` (today `AgentLoop.create(id)` hardcodes `${id}-session` and takes no metadata); reject a 2nd session (single-session MVP, see [ACP multi-session](2026-06-14-acp-multi-session.md)); `cwd` validated (require absolute) — any absolute cwd is honored: it becomes the session's `SessionHeader.cwd` and the default bash workdir (per-session cwd, see § Deferred → RESOLVED), so the server need not launch in the workspace; non-empty `mcpServers` and `additionalDirectories` are rejected for the MVP because silently ignoring requested servers/roots would desync the client's tool and filesystem-scope UI | | `session/load {sessionId, cwd, mcpServers, additionalDirectories}` | the `dsh-agent` resume factory ([session persistence](../../implemented/architecture/2026-06-14-session-persistence.md) + Dependency note) | load `{ meta, events }`, seed the session, re-derive history via `deriveMessages()`, replay prior turns to the client as `session/update` per the ACP load contract; `mcpServers` and `additionalDirectories` rejected as in `session/new` | | `session/prompt {prompt}` | `agent.send()` (idle) | text blocks → `TextBlock`; reject image/audio per advertised capabilities; one in-flight prompt per session | -| resolve `session/prompt` → `{stopReason}` | `agent/turn-end` (extended, see Plan) | map the harness kebab `TurnEndReason` to the ACP snake_case `StopReason` wire enum: `completed`→`end_turn`, `max-tokens`→`max_tokens`, `aborted`(cancel)→`cancelled`, plus `refusal`/`max_turn_requests` when applicable; honor the batch-into-one-turn and send-not-synchronously-running settle semantics | +| resolve `session/prompt` → `{stopReason}` | the `turn/end` `session/event` (its `reason`) | map the harness kebab `TurnEndReason` to the ACP snake_case `StopReason` wire enum: `completed`→`end_turn`, `max-tokens`→`max_tokens`, `aborted`(cancel)→`cancelled`, plus `refusal`/`max_turn_requests` when applicable; honor the batch-into-one-turn and send-not-synchronously-running settle semantics | | `session/update: agent_message_chunk` | `agent/stream-chunk` `text-delta` only | do NOT also emit on `block-end(TextBlock)` — it carries the fully-assembled block and would duplicate the streamed text | | `session/update: agent_thought_chunk` | `agent/stream-chunk` `reasoning-delta` | | | `session/update: tool_call` (pending→in_progress) | `session/event` `tool/call` | demux via a Session→sessionId map; `kind` inferred from the tool name | @@ -46,7 +46,7 @@ Lifecycle and disposal: the connection, listeners, and in-flight permission prom 1. Package scaffold `packages/ui/acp/` per [the cookbook](../../../cookbook/adding-a-package.md); add `@agentclientprotocol/sdk` and `zod`. Add the abstract create/resume factory to `dsh-agent` (the interface) so the bridge can `inject: ['agents', 'sessions', 'tools', 'sessionPersistence']` without depending on the concrete loop; `sessionPersistence` is required because `session/load` advertises `loadSession: true`. (Fallback only if the factory is judged not worth it: inject `agentLoop` directly and record the architecture-rule exception in `docs/architecture.md`.) 2. Connection plus `initialize`/`session/new`: wire `AgentSideConnection` to stdin/stdout; protocolVersion negotiation; the single-session guard; create the live session through the new `{ sessionId, meta }` factory seam (so the ACP `sessionId` and validated `cwd` become the session's id and header); the `sessionId↔agent` and `Session↔sessionId` maps. 3. Internal edit — turn-end reason fidelity (sanctioned: edit internals to fit ACP). Extend `TurnEndReasonMap` in the proper places: (a) declaration-merge a `max-tokens` variant in the owning package (`packages/core/session/src/types.ts`, alongside `completed|aborted|error|disposed`) — add `max-tokens` because `FinishReasonMap` produces it (DeepSeek maps `length` → `max-tokens`); do not add `refusal`, since no current adapter produces it (unknown DeepSeek finish reasons collapse to `error`), but leave a comment in `TurnEndReasonMap` noting `refusal` should be added when an adapter first emits it (`FinishReasonMap` is merge-extensible); (b) make `agent-loop`'s `loop.ts` populate the reason from the model `finish` chunk — `assembler.finish` lives inside `runStep`, so `runStep` must return it up to `runTurn`, and the rule is "the last step's finish reason wins, but any `max-tokens` in the turn surfaces as `max-tokens`"; (c) no consumer exhaustively switches over `TurnEndReason` today (the invariants plugin switches on `SessionEventType`, and `deriveMessages` ignores `turn/end`), so adding `max-tokens` is a non-breaking extension — but recheck before landing; (d) update [docs/architecture.md](../../../architecture.md) (the CI-verified loop-lifecycle/event-taxonomy doc) and the affected package READMEs/JSDoc (`dsh-session`, `dsh-agent`, `dsh-agent-loop`) per the repo doc-sync policy. This replaces a fragile "observe the finish chunk in the bridge" hack with a real, documented contract. -4. Prompt-turn streaming plus load: translate `agent/stream-chunk` and `session/event` into `session/update`; resolve `session/prompt` on settle, mapping the harness `TurnEndReason` to the ACP `StopReason` wire enum (`completed`→`end_turn`, `max-tokens`→`max_tokens`, `aborted`→`cancelled`) — a small total function with a test asserting the exact wire strings, since the SDK rejects an unknown `stopReason`. Concrete correlation, since the loop batches queued messages into one turn and `send()` does not synchronously flip to running: install listeners before `send()`; gate on an observed `agent/turn-start` (confirms work was accepted) then resolve on the next `agent/turn-end`; reject an empty/whitespace prompt up front rather than calling `send()` (no turn would ever start, so the RPC would hang). Implement `session/load` on the session-persistence resume seam. +4. Prompt-turn streaming plus load: translate `agent/stream-chunk` and `session/event` into `session/update`; resolve `session/prompt` on settle, mapping the harness `TurnEndReason` to the ACP `StopReason` wire enum (`completed`→`end_turn`, `max-tokens`→`max_tokens`, `aborted`→`cancelled`) — a small total function with a test asserting the exact wire strings, since the SDK rejects an unknown `stopReason`. Concrete correlation, since the loop batches queued messages into one turn and `send()` does not synchronously flip to running: install the `session/event` listener before `send()`; capture the prompt's owning turn from its `turn/start` record, then resolve on that turn's `turn/end` (with `agent/status` idle/disposed as a fallback); reject an empty/whitespace prompt up front rather than calling `send()` (no turn would ever start, so the RPC would hang). Implement `session/load` on the session-persistence resume seam. 5. Permission gate: a single `tools/execute` listener registered with `prepend: true`, owning a `WeakMap` of bridge-created agents; no-op (`next()`) for unowned/no-agent calls; for owned calls → `session/request_permission` → allow (`next()`) / veto; settle the stored resolver exactly once on outcome, cancel, or connection close. 6. Example wiring (extract a shared base). `@cordisjs/plugin-include` is itself a plugin entry that resets `ctx.baseUrl` and loads a path, so a child `cordis.yml` can nest-include a shared base; the extraction is safe because every dependent plugin declares `inject` (loader groups initialize via `Promise.all`, so YAML order is NOT the dependency mechanism — never rely on it). Extract the provider/tool core (`llm, sessions, system-prompt, tools, agents, invariants, llm-deepseek, bash-local, tool-bash`) into `examples/base.yml`; have both `coding-agent` and a new `examples/acp-agent/` include it and add their own UI plugin plus logger. Keep `agent-loop` per-example (NOT in the base): `AgentLoop` creates its configured agents in its constructor, and the two examples disagree — `coding-agent` needs a pre-created `main` (its `stdio-chat` calls `ctx.agents.get('main')`), while `acp-agent` must pre-create none (ACP `session/new` creates agents). So `coding-agent` declares `agent-loop` with `agents: [{ id: main, … }]` and `acp-agent` with `agents: []`. `acp-agent` loads `dsh-session-persistence-jsonl` (from [session persistence](../../implemented/architecture/2026-06-14-session-persistence.md) — required for `session/load`), omits the stdout logger (see Risks), and adds `pnpm run demo:acp` plus the Zed `agent_servers` snippet. 7. Tests (the repo cares a lot here): a property-based test for the protocol shape (precedent: [property-based testing](../../implemented/testing/2026-06-11-property-based-testing.md)) — fuzz arbitrary harness event sequences and assert ACP-stream invariants (never a `tool_call_update` before its `tool_call`; exactly one `session/prompt` resolution per prompt; monotonic, well-formed ordering; `stopReason` in the legal set); codec unit tests over an in-memory `Duplex` pair (drive `AgentSideConnection` without a subprocess; assert exact frames for `initialize`, `session/new`, a full prompt turn); the mandatory HMR-safety test (dispose the fiber; assert the connection closed, all `ctx.on` listeners gone, any in-flight `request_permission` settled); failure-path tests (connection closes mid-stream; closes with a permission pending; a notification `send()` rejects but the turn survives; `finish{kind:'error'|'aborted'}`; a `tools/execute` throw with no `tool/result`; a second `session/new` rejected; a `session/prompt` while one is in flight; an empty prompt rejected without hanging; a `session/load` re-derives identical history and replays it); and an e2e (`*.e2e.ts`, self-skips without `DEEPSEEK_API_KEY`) that boots `examples/acp-agent`, connects a `ClientSideConnection`, sends a real prompt, owns and disposes the harness in `afterEach`, and verifies the world (files on disk), not the agent's self-report. diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index eba75f9615..3921122559 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -529,11 +529,14 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, // Gating on a "turn started" boolean would skip turn/end and leave a // permanently OPEN turn that poisons the next turn/replay (the turn-enclosure RFC). We // check the log for THIS turn's turn/start: present means a turn/end is owed - // (or was already appended — closeTurn/failTurn are idempotent, so running - // them again is a safe no-op that still preserves the disposed/error reason - // chosen below). Absent means the turn/start append threw BEFORE its push (a - // non-serializable trigger — impossible for our fixed trigger); nothing was - // opened, so rethrow to the runLoop backstop. + // and the normal-exit `closeTurn()` did NOT run (we are here because a throw + // preceded it — the two `closeTurn()` sites are on mutually exclusive paths), + // so this catch appends turn/end with the disposed/error reason chosen below. + // `closeStep()` IS idempotent (guarded by `stepOpen`) — it may have run + // already in a step branch, so running it again is a safe no-op. Absent + // turn/start means the append threw BEFORE its push (a non-serializable + // trigger — impossible for our fixed trigger); nothing was opened, so rethrow + // to the runLoop backstop. const turnStartLogged = session.events.some(e => e.type === 'turn/start' && e.data.turn === turn) if (!turnStartLogged) throw error closeStep() From bb9ae2ba9924d8896b151c858a27f80f4cc28107 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 04:08:24 +0800 Subject: [PATCH 28/47] =?UTF-8?q?docs(bash):=20reframe=20stdin/env=20?= =?UTF-8?q?=E2=80=94=20the=20scrub=20is=20the=20security=20control,=20not?= =?UTF-8?q?=20a=20trust=20boundary?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address review: the "trusted-plugin surface" framing overstated the security story. A model driving the `bash` tool already has equivalent power to set env vars and feed stdin through ordinary shell syntax (`FOO=bar cmd`, heredocs), so the `env`/`stdin` seam fields grant it no new capability — and they cannot exfiltrate the harness's ambient credentials, because the credential SCRUB in dsh-bash-local (which strips *KEY*/*SECRET*/*TOKEN* from process.env before the child sees it) is the actual control, and it works regardless of these fields (tool-call args are static JSON, never shell-evaluated). So drop the "dangerous / trusted-plugin boundary" language across the RFC, the three bash-package READMEs, the bash/src/types.ts JSDoc, and docs/bash.md (both the type-equiv blocks — kept 1:1 with source — and the prose). The reality that remains: the `bash` tool doesn't EXPOSE env/stdin as parameters because they'd be redundant with shell syntax; the fields exist for in-process plugins (the hooks bridges) to pass a JSON payload + CLAUDE_* vars cleanly. The guard test is kept but reframed: it catches a future `...args` spread that would silently forward model input into the post-scrub env merge, NOT a trust wall. No code or behavior change. --- docs/core-data-structures/bash.md | 24 ++++++++-------- ...0-bash-stdin-env-trusted-plugin-surface.md | 16 +++++------ packages/bash/bash-local/README.md | 2 +- packages/bash/bash/README.md | 2 +- packages/bash/bash/src/types.ts | 22 +++++++-------- packages/bash/tool-bash/README.md | 4 +-- packages/bash/tool-bash/tests/tools.spec.ts | 28 +++++++++++-------- 7 files changed, 52 insertions(+), 46 deletions(-) diff --git a/docs/core-data-structures/bash.md b/docs/core-data-structures/bash.md index 2e0c8de3a4..273ba5ebe8 100644 --- a/docs/core-data-structures/bash.md +++ b/docs/core-data-structures/bash.md @@ -19,19 +19,20 @@ interface BashExecRequest { signal?: AbortSignal | undefined /** * Bytes to write to the command's stdin, then close it. Absent leaves stdin - * closed/empty (the default for model-driven tool calls). A TRUSTED-PLUGIN - * surface: the model-facing bash tool does NOT thread model-supplied input - * here — it is set by in-process plugins (e.g. the hooks bridges, which write - * a hook command's JSON payload to its stdin). + * closed/empty (the default for model-driven tool calls). Set by in-process + * plugins (e.g. the hooks bridges, which write a hook command's JSON payload + * to its stdin); the model-facing bash tool does not expose it as a parameter + * (a model that needs stdin uses shell syntax like a heredoc or a pipe). */ stdin?: string | undefined /** * Extra environment entries for the command, merged AFTER the * implementation's credential scrub (so an explicit entry here is honored even - * when its name matches the scrub pattern — the caller takes responsibility). - * Like {@link stdin}, a TRUSTED-PLUGIN surface: the model-facing bash tool - * never forwards model-supplied env; in-process plugins (the hooks bridges) - * set hook env vars (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, …) here. + * when its name matches the scrub pattern — the caller named a value it holds, + * not the harness's ambient secret). Set by in-process plugins (the hooks + * bridges set `CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, …); the model-facing + * bash tool does not expose it as a parameter (a model that needs an env var + * uses shell syntax like `FOO=bar cmd`). */ env?: Record | undefined /** @@ -58,8 +59,7 @@ interface BashExecSpec { * verbatim from {@link BashExecRequest.stdin}. OPTIONAL on the resolved spec * (unlike `owner`): it has no config default, so a missing one means "no * stdin" — the safe, ordinary case — not a silent footgun, so it stays a - * plain optional rather than required-but-nullable. A TRUSTED-PLUGIN surface - * (see the request field). + * plain optional rather than required-but-nullable (see the request field). */ stdin?: string | undefined /** @@ -67,7 +67,7 @@ interface BashExecSpec { * {@link BashExecRequest.env} and merged by the implementation AFTER its * credential scrub (an explicit entry wins even when its name matches the * scrub pattern). OPTIONAL on the spec for the same reason as `stdin` — no - * config default, absent means "no extra env". A TRUSTED-PLUGIN surface. + * config default, absent means "no extra env". */ env?: Record | undefined /** @@ -84,7 +84,7 @@ interface BashExecSpec { The `owner` token is the isolation key: the executor stores it but never interprets it (access policy is the consumer's job), so a background task started by one agent isn't readable cross-session. A required-but-nullable field makes a forgotten owner a visible `undefined` rather than a silently-unowned task. -`stdin` and `env` are a **trusted-plugin surface**: an in-process plugin (the hooks bridges, native plugins) sets them to feed a hook command its JSON payload on stdin and its `CLAUDE_PROJECT_DIR`/`CLAUDE_PLUGIN_ROOT` env. The model-facing `dsh-tool-bash` tool deliberately NEVER forwards model input into either field — its request is built from `command`/`workdir`/`timeoutMs`/`signal`/`owner` only — so a model cannot smuggle an env var or stdin payload past the credential scrub (a guard test asserts this). `env` is merged AFTER the scrub so a trusted caller can set even a credential-shaped var; the scrub's job is to stop the harness's OWN ambient credentials leaking into model-driven commands, not to constrain a trusted plugin. +`stdin` and `env` are set by in-process plugins (the hooks bridges, native plugins) to feed a hook command its JSON payload on stdin and its `CLAUDE_PROJECT_DIR`/`CLAUDE_PLUGIN_ROOT` env. The model-facing `dsh-tool-bash` tool does not expose them as parameters — its request is built from `command`/`workdir`/`timeoutMs`/`signal`/`owner` only — because a model already has equivalent power through shell syntax (`FOO=bar cmd`, a heredoc), so duplicating them as tool params would be redundant. This is NOT a security boundary: the credential scrub in `dsh-bash-local` is what stops the harness's ambient secrets reaching a spawned command, and it works regardless of these fields (a model cannot read a value the scrub removed, and tool-call args are static JSON, never shell-evaluated). A guard test asserts the tool doesn't forward model `env`/`stdin` — to catch a future `...args` spread, not to defend a trust wall. `env` is merged AFTER the scrub so an explicit caller entry (a value it already holds) wins even on a credential-shaped name. See [the bash-stdin-env RFC](../rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). Both ids the seam handles are [branded](core.md) (zero-cost `string` brands, the same machinery as `SessionId`/`AgentId`): `BashTaskId` (a tracked background task, generated `bash-N` by the local executor) and `OwnerToken` (the opaque isolation key). `OwnerToken` is deliberately a DISTINCT brand from `SessionId`, not an alias: the bash seam is a capability seam that must not know what an owner token *means*, so it never imports `dsh-session`'s vocabulary — the `dsh-tool-bash` consumer is the single boundary that casts the owning agent's `SessionId` into an `OwnerToken`. Branding both stops a raw `string` (or a `BashTaskId` where an `OwnerToken` is expected, or vice versa) from slipping through the type checker on the model-facing `task_id` path. diff --git a/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md b/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md index 224ff6c24a..aafa24cb1d 100644 --- a/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md +++ b/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md @@ -1,4 +1,4 @@ -# RFC: stdin + extra env on the bash seam — a trusted-plugin surface +# RFC: stdin + extra env on the bash seam Status: implemented (accepted 2026-06-30) @@ -6,9 +6,9 @@ Status: implemented (accepted 2026-06-30) ## Context -The hooks subsystem runs external hook commands the way Claude Code and Codex do: a hook is a shell command that receives its event payload as **JSON on stdin** and reads context from a handful of **environment variables** (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, `PLUGIN_ROOT`, …). The harness already has a perfectly good command runner behind the `ctx.bash` capability seam ([dsh-bash](../../../../packages/bash/bash) → [dsh-bash-local](../../../../packages/bash/bash-local)), with process-group kills, output truncation/spill, and a credential scrub. Reusing it for hook execution means a hook bridge does not re-implement subprocess plumbing — but the seam had no way to write stdin or set extra env. +The hooks subsystem runs external hook commands the way Claude Code and Codex do: a hook is a shell command that receives its event payload as **JSON on stdin** and reads context from a handful of **environment variables** (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, `PLUGIN_ROOT`, …). The harness already has a perfectly good command runner behind the `ctx.bash` capability seam ([dsh-bash](../../../../packages/bash/bash) → [dsh-bash-local](../../../../packages/bash/bash-local)), with process-group kills, output truncation/spill, and a credential scrub. Reusing it for hook execution means a hook bridge does not re-implement subprocess plumbing — but the seam had no way to write stdin or set extra env. This RFC adds those two inputs. -The friction is that those two inputs are **dangerous in exactly the way the seam was built to prevent**. [dsh-bash-local](../../../../packages/bash/bash-local)'s `childEnv()` deliberately scrubs `*KEY*`/`*SECRET*`/`*TOKEN*` from the child environment so the harness's own `DEEPSEEK_API_KEY` cannot leak into model-driven command output (see [AGENTS.md](../../../../AGENTS.md) § Defensive patterns, "Never hand untrusted/model output the ambient environment or predictable paths"). An arbitrary-env / arbitrary-stdin capability is the opposite of that guarantee. So the question this RFC answers is not "can we add stdin/env" — it is "who is allowed to use them, and how is that boundary enforced". +**These fields are NOT a new security boundary.** It is tempting to frame arbitrary-stdin / arbitrary-env as "dangerous, so gate who may use them" — but that framing is wrong, because a model driving the `bash` tool **already** has equivalent power through ordinary shell syntax: `FOO=bar cmd` sets an env var, a heredoc or `printf … | cmd` feeds arbitrary stdin. Adding `env`/`stdin` as seam fields grants the model no capability it lacks. In particular they cannot exfiltrate the harness's ambient credentials: the real control for that is the **credential scrub** in [dsh-bash-local](../../../../packages/bash/bash-local)'s `childEnv()`, which strips `*KEY*`/`*SECRET*`/`*TOKEN*` from `process.env` before the child sees it (see [AGENTS.md](../../../../AGENTS.md) § Defensive patterns, "Never hand untrusted/model output the ambient environment or predictable paths"). The scrub works regardless of these fields — a model cannot read a value that is not in the environment, and tool-call arguments are static JSON, never shell-evaluated, so a model cannot write `env: {LEAK: $DEEPSEEK_API_KEY}` and have it expand. So the security question is already answered by the scrub; this RFC is only about giving trusted in-process callers a clean way to pass a JSON payload + `CLAUDE_*` vars without routing them through model-visible shell text. ## Decision @@ -16,18 +16,18 @@ Add `stdin?: string` and `env?: Record` to **both** `BashExecReq Three deliberate choices: -1. **`stdin`/`env` are a TRUSTED-PLUGIN surface, enforced at the consumer, not the seam.** The seam itself imposes no access policy (consistent with how `owner` works — the executor stores but never interprets it). The enforcement lives in the model-facing consumer [dsh-tool-bash](../../../../packages/bash/tool-bash): its `bash` tool builds its `BashExecRequest` from `command`/`workdir`/`timeoutMs`/`signal`/`owner` **only**, and never reads model arguments into `stdin`/`env`. A model that smuggles `env`/`stdin` keys into the tool-call arguments gets them ignored. A regression guard (`tool-bash` "trusted-plugin boundary" tests) drives the real tool with adversarial args and asserts the recorded request carries neither field — and is proven to go red if the consumer ever forwards them. Only in-process plugins (the hooks bridges, native plugins) that construct a `BashExecRequest` directly can set them. +1. **The model-facing `bash` tool simply does NOT expose `stdin`/`env` as parameters** — not as a security wall, but because bash syntax already covers the model's needs, so duplicating them as tool params would be redundant surface. [dsh-tool-bash](../../../../packages/bash/tool-bash)'s `bash` tool builds its `BashExecRequest` from `command`/`workdir`/`timeoutMs`/`signal`/`owner` only; a model that includes `env`/`stdin` keys in its tool-call arguments simply has them ignored. A regression guard (`tool-bash` "does not forward env/stdin" tests) drives the real tool with those extra args and asserts the recorded request carries neither field — its purpose is to catch a future refactor that blindly spreads `...args` into the request and silently starts forwarding model input into the post-scrub `env` merge, NOT to defend a trust boundary. In-process plugins (the hooks bridges, native plugins) that construct a `BashExecRequest` directly set the fields; the seam imposes no access policy (consistent with how `owner` works — the executor stores but never interprets it). -2. **`env` merges AFTER the credential scrub, so a trusted caller's explicit entry always wins** — even a credential-shaped name. This is correct precisely because the scrub's job is narrow: stop the harness's *ambient* `process.env` credentials from leaking into *model-driven* commands. A trusted plugin that explicitly sets a var has taken responsibility for it; the scrub is not a constraint on trusted callers. `childEnv(extra?)` layers `scrub(process.env)` → `ENV_OVERRIDES` (the model-friendly `TERM=dumb` etc.) → `extra`, last-wins. +2. **`env` merges AFTER the credential scrub, so an explicit caller entry always wins** — even a credential-shaped name. This is correct because the scrub's job is narrow: stop the harness's *ambient* `process.env` credentials from leaking into a spawned command. A caller that explicitly sets a var has named a value it already holds (not the ambient secret), so the scrub is not a constraint on it. `childEnv(extra?)` layers `scrub(process.env)` → `ENV_OVERRIDES` (the model-friendly `TERM=dumb` etc.) → `extra`, last-wins. 3. **`stdin`/`env` are required-absent-OK (plain optional) on the resolved spec, NOT required-but-nullable like `owner`.** `owner` is required-but-nullable because a *silently* missing owner yields an unowned, cross-session-readable task — a security footgun that a visible `undefined` guards against. `stdin`/`env` have no such hazard: a missing one means "no stdin / no extra env", which is the safe, ordinary case (every model-driven call). So they stay plain optionals, matching `signal`. -`dsh-bash-local` now ALWAYS spawns stdin as a `'pipe'` and closes it immediately — with the supplied bytes when a trusted plugin set `stdin`, empty otherwise. A closed empty pipe gives a reading child EOF exactly as the previous `'ignore'` (`/dev/null`) did, so the no-stdin path is behavior-equivalent; keeping the `stdio` tuple a literal `['pipe','pipe','pipe']` also preserves the typed `spawn` overload that guarantees non-null `stdout`/`stderr`. A child that exits without reading makes the stdin write fail EPIPE; that error is swallowed (the command's outcome rides on its exit code/output, not the write) so it never crashes the host or rejects `done`. +`dsh-bash-local` now ALWAYS spawns stdin as a `'pipe'` and closes it immediately — with the supplied bytes when a caller set `stdin`, empty otherwise. A closed empty pipe gives a reading child EOF exactly as the previous `'ignore'` (`/dev/null`) did, so the no-stdin path is behavior-equivalent; keeping the `stdio` tuple a literal `['pipe','pipe','pipe']` also preserves the typed `spawn` overload that guarantees non-null `stdout`/`stderr`. A child that exits without reading makes the stdin write fail EPIPE; that error is swallowed (the command's outcome rides on its exit code/output, not the write) so it never crashes the host or rejects `done`. ## Scope: configurable scrub pattern is NOT included -An earlier sketch of this work also proposed making `SENSITIVE_ENV_PATTERN` configurable. Validating against the code, that is **speculative and already subsumed**: `run.ts` documents a configurable whitelist as future work, and the new explicit `env` field — merged after the scrub — already gives a trusted plugin full control, including over credential-shaped vars. There is no current caller that needs to *broaden* the ambient scrub (the hazard runs the other way). Adding a config knob now would be a feature with no consumer, against [AGENTS.md](../../../../AGENTS.md) § "Don't add features beyond what the task requires". If a real workflow ever needs to forward a specific ambient credential, the explicit `env` field is the supported path; a configurable scrub can be reconsidered then. +An earlier sketch of this work also proposed making `SENSITIVE_ENV_PATTERN` configurable. Validating against the code, that is **speculative and already subsumed**: `run.ts` documents a configurable whitelist as future work, and the new explicit `env` field — merged after the scrub — already gives a caller full control, including over credential-shaped vars. There is no current caller that needs to *broaden* the ambient scrub (the hazard runs the other way). Adding a config knob now would be a feature with no consumer, against [AGENTS.md](../../../../AGENTS.md) § "Don't add features beyond what the task requires". If a real workflow ever needs to forward a specific ambient credential, the explicit `env` field is the supported path; a configurable scrub can be reconsidered then. ## Consequences -A hook bridge builds a `BashExecRequest` with the hook's JSON payload as `stdin` and its `CLAUDE_*`/`PLUGIN_ROOT` vars as `env`, and runs it through the same `ctx.bash` everything else uses — no bespoke subprocess code, and the full process-group-kill / truncation / spill machinery for free. The model-facing attack surface is unchanged: the consumer's request-building is the single boundary, guarded by a test that fails if it regresses. The vocabulary addition is documented in [docs/core-data-structures/bash.md](../../../core-data-structures/bash.md) (the `type-equiv` request/spec blocks) and the three bash-package READMEs; the trusted-plugin rule mirrors the existing scrub/predictable-path discipline in [AGENTS.md](../../../../AGENTS.md) § Defensive patterns. +A hook bridge builds a `BashExecRequest` with the hook's JSON payload as `stdin` and its `CLAUDE_*`/`PLUGIN_ROOT` vars as `env`, and runs it through the same `ctx.bash` everything else uses — no bespoke subprocess code, and the full process-group-kill / truncation / spill machinery for free. The model-facing attack surface is unchanged (the credential scrub, not these fields, is what bounds it), and the `bash` tool's request-building stays the single place that decides which fields a model call carries — guarded by a test that fails if a refactor starts forwarding model input. The vocabulary addition is documented in [docs/core-data-structures/bash.md](../../../core-data-structures/bash.md) (the `type-equiv` request/spec blocks) and the three bash-package READMEs. diff --git a/packages/bash/bash-local/README.md b/packages/bash/bash-local/README.md index 2ae905b628..7cb6f809c5 100644 --- a/packages/bash/bash-local/README.md +++ b/packages/bash/bash-local/README.md @@ -21,7 +21,7 @@ Design surveyed against the bash tools of Claude Code, OpenCode, Codex, and pi; - **Spawn per call, no shell state** — every call is a fresh non-login `bash -c` (deterministic; no rc files). All four surveyed tools spawn per call. `XXX(stateful-shell)` in `src/run.ts` records the two proven stateful designs (Claude Code's cwd-only persistence; Codex's PTY exec sessions) for when real workflows demand them. - **Process-group kills with escalation** — children are spawned `detached` (own process group); kills send SIGTERM to the group, then SIGKILL after a 3s grace (OpenCode's escalation; pipelines and subshells die with the parent). ESRCH is tolerated; daemons that re-parent away from the group can still survive — same caveat as the surveyed tools. - **Tail-keep truncation + spill files** — output beyond `maxOutputBytes` keeps the in-memory TAIL (errors/results cluster at the end — pi/OpenCode rationale) while the FULL stream is appended to a temp file whose path is reported when available. If the final spill close reports a delayed writeback failure, the executor still returns the tail but withholds the path rather than advertising a possibly incomplete file. -- **Model-friendly env + credential scrub** — `process.env` minus credential-shaped vars (`*KEY*`/`*SECRET*`/`*TOKEN*`), then `NO_COLOR=1 TERM=dumb PAGER=cat GIT_PAGER=cat` (Codex's hardcoded set) so pagers and ANSI color don't garble results. A spec's **trusted-plugin** `env` is merged LAST (after the scrub), so an in-process plugin's explicit entry wins even on a credential-shaped name — the scrub guards the harness's *ambient* credentials from *model-driven* commands, not a trusted caller. The spec's `stdin` (also trusted-plugin) is written to the child and closed; with none supplied, stdin is an immediately-closed empty pipe (EOF, as before). See [the trusted-plugin RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). +- **Model-friendly env + credential scrub** — `process.env` minus credential-shaped vars (`*KEY*`/`*SECRET*`/`*TOKEN*`), then `NO_COLOR=1 TERM=dumb PAGER=cat GIT_PAGER=cat` (Codex's hardcoded set) so pagers and ANSI color don't garble results. This scrub is the security control that keeps the harness's *ambient* credentials out of a spawned command. A spec's `env` is merged LAST (after the scrub), so a caller's explicit entry — a value it already holds — wins even on a credential-shaped name. The spec's `stdin` is written to the child and closed; with none supplied, stdin is an immediately-closed empty pipe (EOF, as before). Both `env`/`stdin` are set by in-process plugins (the hooks bridges); the model-facing tool doesn't expose them. See [the bash-stdin-env RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). - **Background tasks** — `start()` returns immediately, no timeout applies (Claude Code detaches timeouts when backgrounding), `readOutput()` is incremental with whole-stream byte offsets, and disposal kills everything. The spec's opaque `owner` token is stored on the tracked task and returned by `ownerOf(id)` — the executor never interprets it (the consumer's access policy does), and because it lives with the task here it survives a `tool-bash` HMR reload. ## Sandboxing diff --git a/packages/bash/bash/README.md b/packages/bash/bash/README.md index cec9e5834a..39318ae371 100644 --- a/packages/bash/bash/README.md +++ b/packages/bash/bash/README.md @@ -30,4 +30,4 @@ Implementations subclass `BashExecutor`, implement the abstract methods, and cal `BashExecRequest` (command, workdir?, timeoutMs?, signal?, stdin?, env?, owner?) resolves to `BashExecSpec` (command, workdir, timeoutMs, signal?, stdin?, env?, owner) before execution; `owner` is optional on the request and **required-but-nullable** (`OwnerToken | undefined`) on the resolved spec, so a forgotten owner is a visible `undefined` rather than a silently-absent property. The task id (`BashTaskId`) and the `owner` token (`OwnerToken`) are [branded](../../util/brand) — `OwnerToken` is a DISTINCT brand from `SessionId` (the seam never imports `dsh-session`; the `dsh-tool-bash` consumer is the single boundary that casts its `SessionId` into one). `run()` returns `BashRunResult` (exitCode, signal, timedOut, aborted, timeoutMs, stdout/stderr as `CollectedOutput`) and `start()`/`readOutput()` use `BashTask`/`BashTaskRead` for the background side. See `src/types.ts` for the full contracts. -`stdin` and `env` are a **trusted-plugin surface**: an in-process plugin (the hooks bridges, native plugins) sets them to feed a hook command its JSON payload on stdin and its `CLAUDE_PROJECT_DIR`/`CLAUDE_PLUGIN_ROOT` env. The model-facing `dsh-tool-bash` tool deliberately never forwards model input into either — so a model cannot smuggle an env var or stdin payload past the implementation's credential scrub. They are plain optionals on the resolved spec (unlike `owner`'s required-but-nullable): a missing one means "none", the safe default, not a security footgun. See [the trusted-plugin RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). +`stdin` and `env` are set by in-process plugins (the hooks bridges, native plugins) to feed a hook command its JSON payload on stdin and its `CLAUDE_PROJECT_DIR`/`CLAUDE_PLUGIN_ROOT` env. The model-facing `dsh-tool-bash` tool does not expose them as parameters — a model already has equivalent power through shell syntax (`FOO=bar cmd`, a heredoc), so they would be redundant tool params. This is not a security boundary: the implementation's credential scrub (not these fields) is what keeps the harness's ambient secrets out of a spawned command. They are plain optionals on the resolved spec (unlike `owner`'s required-but-nullable): a missing one means "none", the safe default. See [the bash-stdin-env RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). diff --git a/packages/bash/bash/src/types.ts b/packages/bash/bash/src/types.ts index f5be9f11fe..9acd5c7cb7 100644 --- a/packages/bash/bash/src/types.ts +++ b/packages/bash/bash/src/types.ts @@ -47,19 +47,20 @@ export interface BashExecRequest { signal?: AbortSignal | undefined /** * Bytes to write to the command's stdin, then close it. Absent leaves stdin - * closed/empty (the default for model-driven tool calls). A TRUSTED-PLUGIN - * surface: the model-facing bash tool does NOT thread model-supplied input - * here — it is set by in-process plugins (e.g. the hooks bridges, which write - * a hook command's JSON payload to its stdin). + * closed/empty (the default for model-driven tool calls). Set by in-process + * plugins (e.g. the hooks bridges, which write a hook command's JSON payload + * to its stdin); the model-facing bash tool does not expose it as a parameter + * (a model that needs stdin uses shell syntax like a heredoc or a pipe). */ stdin?: string | undefined /** * Extra environment entries for the command, merged AFTER the * implementation's credential scrub (so an explicit entry here is honored even - * when its name matches the scrub pattern — the caller takes responsibility). - * Like {@link stdin}, a TRUSTED-PLUGIN surface: the model-facing bash tool - * never forwards model-supplied env; in-process plugins (the hooks bridges) - * set hook env vars (`CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, …) here. + * when its name matches the scrub pattern — the caller named a value it holds, + * not the harness's ambient secret). Set by in-process plugins (the hooks + * bridges set `CLAUDE_PROJECT_DIR`, `CLAUDE_PLUGIN_ROOT`, …); the model-facing + * bash tool does not expose it as a parameter (a model that needs an env var + * uses shell syntax like `FOO=bar cmd`). */ env?: Record | undefined /** @@ -92,8 +93,7 @@ export interface BashExecSpec { * verbatim from {@link BashExecRequest.stdin}. OPTIONAL on the resolved spec * (unlike `owner`): it has no config default, so a missing one means "no * stdin" — the safe, ordinary case — not a silent footgun, so it stays a - * plain optional rather than required-but-nullable. A TRUSTED-PLUGIN surface - * (see the request field). + * plain optional rather than required-but-nullable (see the request field). */ stdin?: string | undefined /** @@ -101,7 +101,7 @@ export interface BashExecSpec { * {@link BashExecRequest.env} and merged by the implementation AFTER its * credential scrub (an explicit entry wins even when its name matches the * scrub pattern). OPTIONAL on the spec for the same reason as `stdin` — no - * config default, absent means "no extra env". A TRUSTED-PLUGIN surface. + * config default, absent means "no extra env". */ env?: Record | undefined /** diff --git a/packages/bash/tool-bash/README.md b/packages/bash/tool-bash/README.md index f7a15894f9..b81e49d027 100644 --- a/packages/bash/tool-bash/README.md +++ b/packages/bash/tool-bash/README.md @@ -40,9 +40,9 @@ These tools own how their calls render in a UI (an editor's tool-call card) via When a background task finishes, a short notice is injected into the owning agent's session (`agent.inject()`, source `{kind: 'plugin', plugin: 'tool-bash'}`). The owning agent is found by its session token: the listener reads `ctx.bash.ownerOf(task.id)` and scans `ctx.get('agents')?.list()` for an agent whose `session.header.id` matches (read via `ctx.get` — `onTaskDone` runs on the bash fiber, a foreign fiber, so the `ctx.agents` proxy would throw). If no live agent carries that token — e.g. the owning session disconnected and its agent was disposed while the task ran on — the notice is dropped cleanly. Injection is **durable context for the next model request, not a wake-up** — an idle agent stays idle until something sends a message. That's why the tool descriptions tell the model to poll with `bash_output`. -## Trusted-plugin boundary: env / stdin are never model-driven +## The tool builds its request from named args only -The `BashExecRequest` seam carries optional `stdin` and `env` (a **trusted-plugin surface** used by the hooks bridges to feed a hook command its JSON payload and `CLAUDE_*` env). This tool deliberately **never** threads model input into either: its request is built from `command`/`workdir`/`timeoutMs`/`signal`/`owner` only, so a model that includes `env` or `stdin` keys in its tool arguments has them ignored — it cannot smuggle an environment variable or stdin payload past `dsh-bash-local`'s credential scrub. A regression guard (the "trusted-plugin boundary" tests) drives the real tool with adversarial args and asserts the resulting request carries neither field. See [the trusted-plugin RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). +The `BashExecRequest` seam carries optional `stdin` and `env`, used by the hooks bridges to feed a hook command its JSON payload and `CLAUDE_*` env. This tool does **not** expose them as parameters: its request is built from `command`/`workdir`/`timeoutMs`/`signal`/`owner` only, so a model that includes `env` or `stdin` keys in its tool arguments has them ignored. This is not a trust boundary — a model already has equivalent power through shell syntax (`FOO=bar cmd`, a heredoc), and the real defense against leaking the harness's ambient secrets is `dsh-bash-local`'s credential scrub, which works regardless. A regression guard drives the real tool with those extra args and asserts the resulting request carries neither field — its job is to catch a future refactor that blindly spreads `...args` into the request (which would silently forward model input into the post-scrub `env` merge), not to defend a wall. See [the bash-stdin-env RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). ## Permissions diff --git a/packages/bash/tool-bash/tests/tools.spec.ts b/packages/bash/tool-bash/tests/tools.spec.ts index 0845163193..79e8ea183d 100644 --- a/packages/bash/tool-bash/tests/tools.spec.ts +++ b/packages/bash/tool-bash/tests/tools.spec.ts @@ -864,14 +864,18 @@ describe('tool-owned UI presentation (presentCall / presentResult)', () => { }) }) -describe('trusted-plugin boundary: the model-facing bash tool never sets env/stdin', () => { +describe('the model-facing bash tool builds its request from named args only (no {...args} forward)', () => { /** * Records every {@link BashExecRequest} the consumer hands to `resolve()`, so a - * test can assert what the model-facing tool DID and DID NOT forward. `stdin` - * and `env` are a TRUSTED-PLUGIN surface (in-process plugins only); the `bash` - * tool must never thread model-supplied input into them, even when the model - * smuggles extra keys into the tool arguments. Foreground `run()` returns a - * canned result; `start()` is unused here. + * test can assert what the model-facing tool DID and DID NOT forward. The `bash` + * tool does not expose `stdin`/`env` as parameters (bash syntax already gives a + * model that power), so it must build its request from named args only and + * never spread unknown tool-call keys into it. This guard's job is to catch a + * future refactor that blindly forwards `...args` — which would silently thread + * model input into the post-scrub `env` merge — NOT to defend a trust boundary + * (the credential scrub in dsh-bash-local is the security control; see the + * bash-stdin-env RFC). Foreground `run()` returns a canned result; `start()` is + * unused here. */ class RecordingBashExecutor extends BashExecutor { readonly requests: BashExecRequest[] = [] @@ -911,12 +915,14 @@ describe('trusted-plugin boundary: the model-facing bash tool never sets env/std return { ctx, bash: ctx.bash as RecordingBashExecutor } } - it('does not forward env/stdin even when the model smuggles them as extra arguments', async () => { + it('does not forward env/stdin even when the model includes them as extra arguments', async () => { const { ctx, bash } = await setupRecording() - // Adversarial args: the model includes `env` and `stdin` keys (and a - // credential-shaped value) hoping they reach the executor. The bash tool's - // schema ignores unknown keys, and execute() builds the request from only - // command/workdir/timeoutMs/signal — so the recorded request carries NEITHER. + // Extra args: the model includes `env` and `stdin` keys hoping they reach the + // executor. The bash tool's schema ignores unknown keys, and execute() builds + // the request from only command/workdir/timeoutMs/signal — so the recorded + // request carries NEITHER. (Not a security wall — the model could set an env + // var or feed stdin via shell syntax anyway; this just keeps the request + // shape honest so a future `...args` spread can't silently forward input.) await ctx.tools.execute({ callId: CallId('boundary-1'), name: 'bash', From 5533bb783a87d5430253ea76667b119d13075a36 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 04:30:40 +0800 Subject: [PATCH 29/47] docs(bash): purge remaining trusted-plugin wording caught in review Codex review of the reframe found stale "trusted-plugin surface/boundary" wording still in review-relevant spots the first pass missed: - docs/rfc/README.md index title for the RFC. - packages/bash/bash-local/src/run.ts (childEnv JSDoc + SpawnSpec stdin/env JSDoc + the spawn stdin comment) and src/index.ts (resolve carry-through comment); run.ts also pointed at a tool-bash README section name that no longer exists. - the two bash-local test descriptors (run.spec.ts / executor.spec.ts). - the tool-bash guard test's `boundary-*` call ids and one "boundary assertion" comment (renamed to `no-forward-*`). All reworded to the scrub-is-the-control framing (or neutral wording). The RFC FILENAME keeps `-trusted-plugin-surface` as a stable id (many links point at it; the index title and content are corrected). No code or behavior change. --- docs/rfc/README.md | 2 +- packages/bash/bash-local/src/index.ts | 4 +-- packages/bash/bash-local/src/run.ts | 28 ++++++++++--------- .../bash/bash-local/tests/executor.spec.ts | 2 +- packages/bash/bash-local/tests/run.spec.ts | 2 +- packages/bash/tool-bash/tests/tools.spec.ts | 6 ++-- 6 files changed, 23 insertions(+), 21 deletions(-) diff --git a/docs/rfc/README.md b/docs/rfc/README.md index 5c47c98599..f40d47a3e9 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -121,7 +121,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Branded IDs everywhere they belong](implemented/architecture/2026-06-20-branded-ids.md) | 2026-06-20 | | [Extract example apps into packages](implemented/architecture/2026-06-20-extract-example-app-packages.md) | 2026-06-20 | | [Event-domain semantics — session is the fact log, agent is the live surface](implemented/architecture/2026-06-30-event-domain-semantics.md) | 2026-06-30 | -| [stdin + extra env on the bash seam — a trusted-plugin surface](implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md) | 2026-06-30 | +| [stdin + extra env on the bash seam](implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md) | 2026-06-30 | ### Process diff --git a/packages/bash/bash-local/src/index.ts b/packages/bash/bash-local/src/index.ts index 53c369a24c..b1ea729fb4 100644 --- a/packages/bash/bash-local/src/index.ts +++ b/packages/bash/bash-local/src/index.ts @@ -116,8 +116,8 @@ export class LocalBashExecutor extends BashExecutor { workdir: request.workdir ?? this.config.cwd ?? process.cwd(), timeoutMs, ...request.signal ? { signal: request.signal } : {}, - // Carry the trusted-plugin stdin/env through verbatim — optional, no - // config default (absent means none). env merges AFTER the scrub in run.ts. + // Carry stdin/env through verbatim — optional, no config default (absent + // means none). env merges AFTER the scrub in run.ts. ...request.stdin !== undefined ? { stdin: request.stdin } : {}, ...request.env !== undefined ? { env: request.env } : {}, // Carry the owner through verbatim (required-but-nullable on the spec): diff --git a/packages/bash/bash-local/src/run.ts b/packages/bash/bash-local/src/run.ts index 5b67bbdc1b..de3d880c7c 100644 --- a/packages/bash/bash-local/src/run.ts +++ b/packages/bash/bash-local/src/run.ts @@ -48,12 +48,13 @@ export const SENSITIVE_ENV_PATTERN = /KEY|SECRET|TOKEN/i * * Layering matters: the scrub drops `process.env` credentials, then * `ENV_OVERRIDES` forces the model-friendly terminal vars, then `extra` is - * merged LAST so a TRUSTED-PLUGIN entry wins even when its name matches the - * scrub pattern (the scrub guards against leaking the HARNESS's ambient - * credentials into model-driven commands; an in-process plugin that explicitly - * sets a var has taken responsibility for it). `extra` is NEVER model-supplied - * — `dsh-tool-bash` does not forward model input here (see its README, § - * "Trusted-plugin boundary"). + * merged LAST so an explicit caller entry wins even when its name matches the + * scrub pattern (the scrub is the control that stops the HARNESS's ambient + * credentials leaking into a spawned command; a caller that explicitly sets a + * var named a value it already holds, not that ambient secret). `extra` is set + * by in-process plugins (the hooks bridges), not the model — `dsh-tool-bash` + * builds its request from named fields only and does not forward model input + * here (see its README, § "The tool builds its request from named args only"). */ export function childEnv(extra?: Record): NodeJS.ProcessEnv { const env: NodeJS.ProcessEnv = {} @@ -75,14 +76,15 @@ export interface SpawnSpec { signal?: AbortSignal | undefined /** * Bytes to write to the child's stdin, then close it. Absent (or empty) - * leaves stdin closed/empty. A TRUSTED-PLUGIN surface (see {@link SpawnSpec}'s - * consumer `dsh-bash`); never carries model input. + * leaves stdin closed/empty. Set by in-process plugins (the hooks bridges); + * the model-facing `dsh-tool-bash` tool does not thread model input here. */ stdin?: string | undefined /** * Extra environment entries, merged onto the scrubbed env AFTER the * credential scrub and the model-friendly overrides (so an explicit entry - * wins). A TRUSTED-PLUGIN surface; never carries model input. + * wins). Set by in-process plugins; the model-facing tool does not forward + * model input here. */ env?: Record | undefined } @@ -297,10 +299,10 @@ export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningB } // stdin is ALWAYS a pipe (kept literal so the typed spawn overload guarantees - // non-null stdout/stderr) and is closed immediately: with bytes when a - // trusted plugin supplied stdin, empty otherwise. A closed empty pipe gives a - // reading child EOF exactly as `/dev/null` would, so the no-stdin path (every - // model-driven call) is unchanged. + // non-null stdout/stderr) and is closed immediately: with bytes when a caller + // supplied stdin, empty otherwise. A closed empty pipe gives a reading child + // EOF exactly as `/dev/null` would, so the no-stdin path (every model-driven + // call) is unchanged. const child = spawn('bash', ['-c', spec.command], { cwd: spec.cwd, env: childEnv(spec.env), diff --git a/packages/bash/bash-local/tests/executor.spec.ts b/packages/bash/bash-local/tests/executor.spec.ts index 03f602a2f1..cf6d1c267e 100644 --- a/packages/bash/bash-local/tests/executor.spec.ts +++ b/packages/bash/bash-local/tests/executor.spec.ts @@ -110,7 +110,7 @@ describe('LocalBashExecutor.run', () => { it('resolve() carries stdin/env onto the spec, and run() threads them to the command', async () => { const { bash } = await setup() const spec = bash.resolve({ command: 'cat; echo "[$DSH_SEAM_VAR]"', stdin: 'piped\n', env: { DSH_SEAM_VAR: 'env-ok' } }) - // resolve() keeps the trusted-plugin fields verbatim (optional, no default). + // resolve() keeps the stdin/env fields verbatim (optional, no default). expect(spec.stdin).toBe('piped\n') expect(spec.env).toEqual({ DSH_SEAM_VAR: 'env-ok' }) const result = await bash.run(spec) diff --git a/packages/bash/bash-local/tests/run.spec.ts b/packages/bash/bash-local/tests/run.spec.ts index 3859f2ac39..395f442dad 100644 --- a/packages/bash/bash-local/tests/run.spec.ts +++ b/packages/bash/bash-local/tests/run.spec.ts @@ -158,7 +158,7 @@ describe('runBash', () => { }) }) -describe('stdin and extra env (trusted-plugin surface)', () => { +describe('stdin and extra env (set by in-process plugins)', () => { it('writes stdin to the command and closes it', async () => { const result = await runBash(spec('cat', { stdin: 'hello from stdin\n' })).done expect(result.exitCode).toBe(0) diff --git a/packages/bash/tool-bash/tests/tools.spec.ts b/packages/bash/tool-bash/tests/tools.spec.ts index 79e8ea183d..8fd131d251 100644 --- a/packages/bash/tool-bash/tests/tools.spec.ts +++ b/packages/bash/tool-bash/tests/tools.spec.ts @@ -924,7 +924,7 @@ describe('the model-facing bash tool builds its request from named args only (no // var or feed stdin via shell syntax anyway; this just keeps the request // shape honest so a future `...args` spread can't silently forward input.) await ctx.tools.execute({ - callId: CallId('boundary-1'), + callId: CallId('no-forward-1'), name: 'bash', arguments: { command: 'echo hi', @@ -943,9 +943,9 @@ describe('the model-facing bash tool builds its request from named args only (no it('a background bash call likewise carries no env/stdin', async () => { const { ctx, bash } = await setupRecording() // start() throws in this recorder, but resolve() runs first and records the - // request — which is all this boundary assertion needs. + // request — which is all this no-forward assertion needs. await ctx.tools.execute({ - callId: CallId('boundary-2'), + callId: CallId('no-forward-2'), name: 'bash', arguments: { command: 'sleep 1', From d3be934a173a0d58295c8be48904dafba85added Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 05:13:16 +0800 Subject: [PATCH 30/47] docs(events): fix stale turn-mirror / tools-execute prose caught in review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex review of the interception-seams merge flagged current-state prose still describing removed/renamed surfaces: - packages/core/agent/src/types.ts module doc: the agent/* "transient emits" list still ended with "the turn boundaries" — corrected to state turn/step boundaries are durable session/event records, not agent/* emits, and to list the actual interception seams (prompt-submit/pre-step/request/step-result/ turn-continuation) + agent/session-start. - interception-seams RFC: "agent/turn-end fires and the ACP bridge settles" → the durable turn/end is appended and ACP settles off it (no turn mirror). - two proposed RFCs (acp-agent-client-protocol, optional-code-mode) named the pre-split `tools/execute` waterfall → the `tools/pre-execute`/`tools/post-execute` pair. Regenerated the cordis catalog (module-doc change). No code/behavior change. --- docs/cordis-catalog/events-and-services.md | 26 +++++++++---------- .../feature/2026-06-30-interception-seams.md | 2 +- .../2026-06-14-acp-agent-client-protocol.md | 2 +- .../feature/2026-06-15-optional-code-mode.md | 2 +- packages/core/agent/src/types.ts | 14 +++++----- 5 files changed, 24 insertions(+), 22 deletions(-) diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index 62174667b1..dc4b91f6b3 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages. Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:227`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:229`](../../packages/core/agent/src/types.ts) #### `agent/disposed` — emit @@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:233`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:235`](../../packages/core/agent/src/types.ts) #### `agent/error` — emit @@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:352`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:354`](../../packages/core/agent/src/types.ts) #### `agent/pre-step` — serial @@ -63,7 +63,7 @@ Serial (awaited in registration order), not a waterfall: a listener mutates the Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:299`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:301`](../../packages/core/agent/src/types.ts) #### `agent/prompt-submit` — waterfall @@ -75,7 +75,7 @@ Waterfall: decide what happens to ONE drained queued message before it becomes a Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:309`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:311`](../../packages/core/agent/src/types.ts) #### `agent/queued` — emit @@ -87,7 +87,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:246`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:248`](../../packages/core/agent/src/types.ts) #### `agent/request` — waterfall @@ -99,7 +99,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:318`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:320`](../../packages/core/agent/src/types.ts) #### `agent/session-start` — emit @@ -111,7 +111,7 @@ The agent's session lifecycle began, fired once before its first turn. `source` Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:259`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:261`](../../packages/core/agent/src/types.ts) #### `agent/status` — emit @@ -123,7 +123,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:240`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:242`](../../packages/core/agent/src/types.ts) #### `agent/steering` — emit @@ -135,7 +135,7 @@ Steering content was injected into a running turn. Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:346`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:348`](../../packages/core/agent/src/types.ts) #### `agent/step-result` — waterfall @@ -147,7 +147,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:324`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:326`](../../packages/core/agent/src/types.ts) #### `agent/stream-chunk` — emit @@ -159,7 +159,7 @@ A raw StreamChunk arrived from the model (token-level UI/log feed). Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md) -Source: [`packages/core/agent/src/types.ts:341`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:343`](../../packages/core/agent/src/types.ts) #### `agent/turn-continuation` — waterfall @@ -171,7 +171,7 @@ Waterfall: override the turn-continuation decision via a typed ContinuationDecis Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:334`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:336`](../../packages/core/agent/src/types.ts) ### `llm/*` diff --git a/docs/rfc/implemented/feature/2026-06-30-interception-seams.md b/docs/rfc/implemented/feature/2026-06-30-interception-seams.md index c79f237343..7f2d23ab3e 100644 --- a/docs/rfc/implemented/feature/2026-06-30-interception-seams.md +++ b/docs/rfc/implemented/feature/2026-06-30-interception-seams.md @@ -26,7 +26,7 @@ Add/​reshape the interception seams so every one returns a small, seam-specifi ### Three load-bearing loop decisions -1. **Always open the turn first; a fully-blocked batch is a zero-step `rejected` turn.** `prompt-submit` fires AFTER `turn/start`, per message. A batch whose every prompt is blocked does NOT skip the turn — it opens a zero-step turn that closes with `rejected`. This one move resolves three problems at once: (1) turn-enclosure holds (every event has an open turn to live in); (2) `agent/turn-end` fires and the ACP bridge settles normally (mapping `rejected`→`cancelled`) instead of hanging; (3) the block reason is a durable in-turn fact. An `allow`'s `additionalContext` is `inject()`ed into this now-open turn. +1. **Always open the turn first; a fully-blocked batch is a zero-step `rejected` turn.** `prompt-submit` fires AFTER `turn/start`, per message. A batch whose every prompt is blocked does NOT skip the turn — it opens a zero-step turn that closes with `rejected`. This one move resolves three problems at once: (1) turn-enclosure holds (every event has an open turn to live in); (2) the durable `turn/end` is appended and the ACP bridge settles normally off it (mapping `rejected`→`cancelled`) instead of hanging; (3) the block reason is a durable in-turn fact. An `allow`'s `additionalContext` is `inject()`ed into this now-open turn. 2. **Post-tool `additionalContext` is buffered and appended AFTER all `tool/result`s.** `content`/`feedback` shape the result `execute()` returns, but `additionalContext` is a SEPARATE `context/message`, and a single step can carry multiple tool calls. Appending context right after each result would interleave `result(c1) → context → result(c2)` and break tool-call/result adjacency. So `execute()` surfaces `additionalContext` on its `ToolExecutionResult`, and the loop buffers every per-call context for the step and appends them as `context/message`(s) only after every `tool/result` is appended. diff --git a/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md b/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md index 0aa5af4dc4..1e31a3fdb8 100644 --- a/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md +++ b/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md @@ -15,7 +15,7 @@ This RFC has a hard prerequisite on [session persistence](../../implemented/arch ## Proposal -A new plugin package `@deepseek-ai/dsh-acp` — a client-driver / UI plugin, the structured analogue of `stdio-chat`. It is NOT a change to the loop and NOT an [capability seams](../../implemented/architecture/2026-06-13-capability-seams.md) interface/implementation/consumer capability split; it consumes the existing `agent/*` event taxonomy and the `tools/execute` waterfall. +A new plugin package `@deepseek-ai/dsh-acp` — a client-driver / UI plugin, the structured analogue of `stdio-chat`. It is NOT a change to the loop and NOT an [capability seams](../../implemented/architecture/2026-06-13-capability-seams.md) interface/implementation/consumer capability split; it consumes the existing `agent/*` event taxonomy and the `tools/pre-execute`/`tools/post-execute` waterfalls. It depends on the official `@agentclientprotocol/sdk` (the `AgentSideConnection` class) — Apache-2.0, actively versioned. The SDK declares a `zod` peer dependency and imports `zod/v4` at runtime, so `packages/ui/acp` must declare `zod` itself (per the workspace dependency constraints). This is the renamed successor to `@zed-industries/agent-client-protocol`, which is now deprecated on npm. diff --git a/docs/rfc/proposed/feature/2026-06-15-optional-code-mode.md b/docs/rfc/proposed/feature/2026-06-15-optional-code-mode.md index eb41750d1d..f5da38c14c 100644 --- a/docs/rfc/proposed/feature/2026-06-15-optional-code-mode.md +++ b/docs/rfc/proposed/feature/2026-06-15-optional-code-mode.md @@ -55,7 +55,7 @@ These are illustrations of the seam's reach, **not commitments** — the MVP shi **3c. The single tool — `run_code`.** Registered normally in `ctx.tools` with one parameter `{ code: string (required) }`. Because it is an ordinary tool, the unchanged loop dispatches it through the normal path — this is the crux of "zero loop changes." Its `execute(args, exec)`: -1. Builds the SDK bindings. For each real tool, an async `invoke(callArgs)` that **checks `exec.signal?.aborted` (throwing if set) before and after** calling `ctx.tools.execute({ callId: , name, arguments: callArgs, agent: exec.agent, signal: exec.signal })`, then maps the resulting `ContentBlock[]` to a simplified `{ output, isError }` (text blocks for the MVP), and emits an observability event. The explicit abort check matters because `ctx.tools.execute()` *catches* thrown tool errors and converts them to `isError` results — without the check, an aborted sub-call would look like ordinary error data and the program would keep running instead of stopping. Sub-dispatch still flows through the `tools/execute` waterfall, so permission/sandbox/hook plugins apply to code-mode calls exactly as to native ones. +1. Builds the SDK bindings. For each real tool, an async `invoke(callArgs)` that **checks `exec.signal?.aborted` (throwing if set) before and after** calling `ctx.tools.execute({ callId: , name, arguments: callArgs, agent: exec.agent, signal: exec.signal })`, then maps the resulting `ContentBlock[]` to a simplified `{ output, isError }` (text blocks for the MVP), and emits an observability event. The explicit abort check matters because `ctx.tools.execute()` *catches* thrown tool errors and converts them to `isError` results — without the check, an aborted sub-call would look like ordinary error data and the program would keep running instead of stopping. Sub-dispatch still flows through the `tools/pre-execute`/`tools/post-execute` waterfalls, so permission/sandbox/hook plugins apply to code-mode calls exactly as to native ones. 2. Calls `ctx.codeRuntime.run({ code: args.code, sdk: bindings, signal: exec.signal })`. 3. Surfaces the outcome. A *successful* run returns `[{ type: 'text', text: }]`. A *runtime-error* result cannot be reported by returning content, because a normal `ToolDefinition.execute()` returns only `Promise` and `ToolRegistry.execute()` hardcodes `isError: false` on any successful return — `isError: true` arises only from the registry's catch path. So on an error result the tool **throws a `CodeRunError extends HarnessError`** (`HarnessError` is exported from `dsh-llm`; the registry catch turns any throw into `isError: true` with the message as text, and a `HarnessError` additionally carries structured `{ name, code }`). An alternative — registering `run_code` handling as a `tools/execute` listener that returns a full `ToolExecutionResult` and can set `isError` directly — is noted; the throw is simpler and preferred. diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts index e7511935a9..b92bc08d39 100644 --- a/packages/core/agent/src/types.ts +++ b/packages/core/agent/src/types.ts @@ -16,12 +16,14 @@ * durability checkpoint. Answers "what happened, durably/replayably." A * consumer that wants the live transcript subscribes here. * - **`agent/*`** (this module) — the LIVE runtime surface. Always carries the - * live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, - * `agent/step-result`, `agent/turn-continuation`) that mutate/veto, and - * TRANSIENT emits (`agent/status`, `agent/stream-chunk`, `agent/error`, - * `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`, and the - * turn boundaries) that notify with the `Agent` in hand. Answers "right now, - * with the agent object — intercept or observe." + * live `Agent`. Two shapes: INTERCEPTION seams (the `agent/prompt-submit`/ + * `agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls and + * the serial `agent/pre-step`) that mutate/veto, and TRANSIENT emits + * (`agent/status`, `agent/stream-chunk`, `agent/error`, `agent/created`/ + * `agent/disposed`, `agent/queued`, `agent/steering`, `agent/session-start`) + * that notify with the `Agent` in hand. Turn/step boundaries are NOT here — + * they are durable `session/event` records. Answers "right now, with the agent + * object — intercept or observe." * - **`tools/*`** (`@deepseek-ai/dsh-tools`) — the tool registry + execution. * * **The rule:** a durable, replayable fact is a SessionEvent; a live From 84f3019310c6b8734bdfa36095802528ee29cbbe Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 05:52:02 +0800 Subject: [PATCH 31/47] refactor(subagent): drop the agentType lifecycle field MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address review: `agentType` was a Claude-Code concept (`subagent_type`) that does not fit our own subagent seam — nothing in the harness interprets it, and its only consumer was the CC-dialect hook bridge. Rather than let a foreign concept sit on the core seam, remove it: - `SubagentStartRequest`, `SubagentRunInfo`, `SubagentRunEndInfo`: drop the `agentType` field; the `subagent/start`/`subagent/end` payloads now carry `provider`/`id` (+ end `stopReason`/`lastAssistantMessage`) only. - `dsh-tool-subagent`: drop `Config.agentType` and its request plumbing. - Tests: keep the lastAssistantMessage / clone-containment / reject-path coverage (rewritten to not assert agentType); delete the two tool-subagent tests that only exercised agentType forwarding (dead behavior). - Docs: retitle + rewrite the subagent-observe-enrich RFC to the one shipped enrichment (lastAssistantMessage), with a note on why agentType was dropped; update rfc/README index title, both subagent READMEs, and the core-data-structures/subagent.md type-equiv block + prose; regenerate catalog. The CC bridge (PR-F) will feed Claude Code's own default matcher value "general-purpose" for its SubagentStart/Stop agent_type matcher instead. --- docs/cordis-catalog/events-and-services.md | 2 +- docs/core-data-structures/subagent.md | 3 +- docs/rfc/README.md | 2 +- .../2026-06-30-subagent-observe-enrich.md | 21 ++++---- packages/subagent/subagent/README.md | 2 +- packages/subagent/subagent/src/index.ts | 24 +++------ packages/subagent/subagent/src/types.ts | 9 ---- .../subagent/subagent/tests/service.spec.ts | 39 +++----------- packages/subagent/tool-subagent/README.md | 1 - packages/subagent/tool-subagent/src/index.ts | 10 ---- .../tool-subagent/tests/tool-subagent.spec.ts | 54 ------------------- 11 files changed, 29 insertions(+), 138 deletions(-) diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index e6dd0881fa..ae549af20f 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -445,7 +445,7 @@ list(): string[] start(name: string, request: SubagentStartRequest): SubagentRun ``` -Source: [`packages/subagent/subagent/src/index.ts:130`](../../packages/subagent/subagent/src/index.ts) +Source: [`packages/subagent/subagent/src/index.ts:121`](../../packages/subagent/subagent/src/index.ts) ### `ctx.systemPrompt` — `SystemPrompt` diff --git a/docs/core-data-structures/subagent.md b/docs/core-data-structures/subagent.md index ca85830808..1d998b60b7 100644 --- a/docs/core-data-structures/subagent.md +++ b/docs/core-data-structures/subagent.md @@ -25,7 +25,6 @@ What a caller asks for when starting a subagent. The tool layer builds this from ```ts type-equiv interface SubagentStartRequest { prompt: ContentBlock[] - agentType?: string parent: Agent signal?: AbortSignal agentOptions?: AgentOptions @@ -86,7 +85,7 @@ interface SubagentProvider { } ``` -The service (`ctx.subagents`) emits `subagent/start` when a run begins and `subagent/end` when it settles (see the [events catalog](../cordis-catalog/events-and-services.md)). Both payloads carry the caller's optional `agentType` label (verbatim from the request — Claude Code's `subagent_type`); `subagent/end` additionally carries `lastAssistantMessage` (the child's final `output`) on the settle path, so an observer sees WHAT the subagent produced without holding the run (absent when the run rejected at the infrastructure level — no result was produced). These are **observe-only** enrichments: both events are plain `emit`s (the `subagent/end` fires from a detached `.then` after the result settles and awaits no listener), so a subscriber observes but cannot change the run. Both emits contain a thrown listener **per listener** (logged, never propagated): one bad subscriber can neither strand a live run, surface as an unhandled rejection on the detached settle hook, nor starve the listeners registered after it. +The service (`ctx.subagents`) emits `subagent/start` when a run begins and `subagent/end` when it settles (see the [events catalog](../cordis-catalog/events-and-services.md)). `subagent/end` carries `lastAssistantMessage` (the child's final `output`) on the settle path, so an observer sees WHAT the subagent produced without holding the run (absent when the run rejected at the infrastructure level — no result was produced). These are **observe-only** events: both are plain `emit`s (the `subagent/end` fires from a detached `.then` after the result settles and awaits no listener), so a subscriber observes but cannot change the run. Both emits contain a thrown listener **per listener** (logged, never propagated): one bad subscriber can neither strand a live run, surface as an unhandled rejection on the detached settle hook, nor starve the listeners registered after it. ## In-process backends: depth and seed diff --git a/docs/rfc/README.md b/docs/rfc/README.md index 29267f2ef2..4e77e322c2 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -87,7 +87,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [ACP subagent backend (out-of-process delegation)](implemented/feature/2026-06-22-acp-subagent-backend.md) | 2026-06-22 | | [The `todo_write` tool — model task list as event-sourced session state](implemented/feature/2026-06-29-todo-write-tool.md) | 2026-06-29 | | [Interception seams — the typed-Decision surface a hook programs against](implemented/feature/2026-06-30-interception-seams.md) | 2026-06-30 | -| [Subagent lifecycle enrichment — agentType + lastAssistantMessage (observe-only)](implemented/feature/2026-06-30-subagent-observe-enrich.md) | 2026-06-30 | +| [Subagent lifecycle enrichment — lastAssistantMessage (observe-only)](implemented/feature/2026-06-30-subagent-observe-enrich.md) | 2026-06-30 | ### Simplification diff --git a/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md b/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md index a1893ed99c..b67ede3ab6 100644 --- a/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md +++ b/docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md @@ -1,22 +1,25 @@ -# RFC: Subagent lifecycle enrichment — agentType + lastAssistantMessage (observe-only) +# RFC: Subagent lifecycle enrichment — lastAssistantMessage (observe-only) Status: implemented (accepted 2026-06-30) + ## Context -The hooks subsystem ([interception seams RFC](2026-06-30-interception-seams.md)) lets a plugin observe and gate the agent at lifecycle points. Claude Code and Codex both expose **SubagentStart / SubagentStop** hooks, and CC's carry a `subagent_type` (which named subagent kind ran) and the subagent's final message. The harness already emits `subagent/start` and `subagent/end` lifecycle events ([the subagent capability-seam](2026-06-21-subagent-capability-seam.md)), but their payloads were minimal (`provider`, `id`, and on end `stopReason`) — not enough for a hooks bridge to report which KIND of subagent ran, or WHAT it produced, without separately reaching for the live run. +The hooks subsystem ([interception seams RFC](2026-06-30-interception-seams.md)) lets a plugin observe and gate the agent at lifecycle points. Claude Code and Codex both expose **SubagentStart / SubagentStop** hooks, and CC's carry the subagent's final message. The harness already emits `subagent/start` and `subagent/end` lifecycle events ([the subagent capability-seam](2026-06-21-subagent-capability-seam.md)), but their payloads were minimal (`provider`, `id`, and on end `stopReason`) — not enough for a hooks bridge to report WHAT a subagent produced without separately reaching for the live run. -This RFC enriches those two payloads. It is deliberately **observe-only**: no control-flow change, no waterfall, no `start()` restructure. A run-affecting subagent-stop decision (continuation, injection that changes the run) is a separate, larger redesign and stays out of scope. +This RFC enriches the end payload. It is deliberately **observe-only**: no control-flow change, no waterfall, no `start()` restructure. A run-affecting subagent-stop decision (continuation, injection that changes the run) is a separate, larger redesign and stays out of scope. ## Decision -Add two pieces of information to the subagent lifecycle surface: - -1. **`agentType` — a caller-supplied subagent-kind label**, the harness analogue of CC's `subagent_type`. It is optional on `SubagentStartRequest`, carried VERBATIM onto both `subagent/start` (`SubagentRunInfo`) and `subagent/end` (`SubagentRunEndInfo`). The seam never interprets it. The model-facing `dsh-tool-subagent` tool threads it from a new optional `Config.agentType`, so a deployment that exposes multiple subagent kinds (one tool load per kind) labels each. Absent when the caller does not distinguish kinds (the spread omits the key — `exactOptionalPropertyTypes`-correct). - -2. **`lastAssistantMessage` — the child's final output**, added to `SubagentRunEndInfo`. On the settle path it is a DEEP CLONE of `SubagentResult.output` (so an observer sees WHAT the subagent produced without holding the run). On the REJECT path (an infrastructure fault where no `SubagentResult` was produced — the seam only knows `stopReason: 'error'`) it is absent. The clone is load-bearing for observe-only: the `subagent/end` emit fires from a detached `.then` registered *before* `start()` returns, i.e. before the caller's own `await run.result` continuation — handing listeners the same array reference would let a mutating listener corrupt the caller's `SubagentResult.output`. `structuredClone` makes the event a read-only view (a regression test mutates the event's array and asserts the caller's result is untouched). +**Add `lastAssistantMessage` — the child's final output — to `SubagentRunEndInfo`.** On the settle path it is a DEEP CLONE of `SubagentResult.output` (so an observer sees WHAT the subagent produced without holding the run). On the REJECT path (an infrastructure fault where no `SubagentResult` was produced — the seam only knows `stopReason: 'error'`) it is absent. The clone is load-bearing for observe-only: the `subagent/end` emit fires from a detached `.then` registered *before* `start()` returns, i.e. before the caller's own `await run.result` continuation — handing listeners the same array reference would let a mutating listener corrupt the caller's `SubagentResult.output`. `structuredClone` makes the event a read-only view (a regression test mutates the event's array and asserts the caller's result is untouched); a clone failure is contained (logged, the event still fires without `lastAssistantMessage`) rather than becoming an unhandled rejection on the detached `.then`. Both events stay plain **`emit`s**. `subagent/end` fires from a detached `.then` on `run.result` and awaits no listener, so it is genuinely observe-only by construction — a `subagent/start` listener can still reach the live child via `ctx.agents.get(info.id)` and `inject()` into it; a `subagent/end` listener can only observe (the run has settled). Per-listener containment (already in place) keeps one bad subscriber from stranding a live run or surfacing as an unhandled rejection on the detached settle hook. @@ -26,4 +29,4 @@ A control-flow `subagent/end` (an awaited waterfall returning a stop/continue de ## Consequences -A hooks bridge (or a native plugin) can now translate SubagentStart/SubagentStop faithfully: it reports `agentType`, matches its hook config on it, and forwards the child's `lastAssistantMessage` to a SubagentStop handler — all by subscribing to the existing emits, no new control-flow surface. The vocabulary addition is documented in [docs/core-data-structures/subagent.md](../../../core-data-structures/subagent.md) (the `SubagentStartRequest` type-equiv block + the events prose) and the two subagent READMEs; the catalog is regenerated. No production behavior changes — the events fire exactly as before, with two more (optional) fields on their payloads — so no snapshot or e2e change is needed. +A hooks bridge (or a native plugin) can now forward the child's `lastAssistantMessage` to a SubagentStop handler by subscribing to the existing emits — no new control-flow surface. The vocabulary addition is documented in [docs/core-data-structures/subagent.md](../../../core-data-structures/subagent.md) (the events prose) and the two subagent READMEs; the catalog is regenerated. No production behavior changes — the events fire exactly as before, with one more (optional) field on the end payload — so no snapshot or e2e change is needed. diff --git a/packages/subagent/subagent/README.md b/packages/subagent/subagent/README.md index 6db26272c7..3b72971dc1 100644 --- a/packages/subagent/subagent/README.md +++ b/packages/subagent/subagent/README.md @@ -32,7 +32,7 @@ Unlike the bash seam (one executor per context, second load throws), **multiple `provider.start(request)` returns a `SubagentRun`: a handle with a `result` promise, `cancel()`, `dispose()`, and the optional runtime methods. `result` resolves with a `SubagentResult` (`output`, optional `structured`, `stopReason`) — it does **not** reject on a child-level failure (a model/transport failure resolves with `stopReason: 'error'`), so the consumer maps a non-`completed` reason to an `isError` tool result. The consumer MUST `dispose()` on every path (success, error, abort) to reach child quiescence and avoid leaking an idle child / session. -The service emits `subagent/start` (payload `SubagentRunInfo`) and `subagent/end` (payload `SubagentRunEndInfo`) around the run — both **observe-only** (plain `emit`s; `subagent/end` fires from a detached `.then` and awaits no listener). Both payloads carry the request's optional `agentType` label (Claude Code's `subagent_type`, verbatim — the seam never interprets it); `subagent/end` additionally carries `lastAssistantMessage` (a deep clone of the child's final `output`) on the settle path, absent when the run rejected at the infrastructure level. The clone keeps the surface observe-only: the end emit fires from a detached `.then` before the caller's `await run.result` resumes, so a shared reference would let a mutating listener corrupt the caller's result. A `subagent/start` listener can still reach the live child via `ctx.agents.get(info.id)`; a `subagent/end` listener can only observe (the run has settled). Any run-affecting decision (continuation, injection that changes the run) is out of scope for this observe-only surface. +The service emits `subagent/start` (payload `SubagentRunInfo`) and `subagent/end` (payload `SubagentRunEndInfo`) around the run — both **observe-only** (plain `emit`s; `subagent/end` fires from a detached `.then` and awaits no listener). `subagent/end` carries `lastAssistantMessage` (a deep clone of the child's final `output`) on the settle path, absent when the run rejected at the infrastructure level. The clone keeps the surface observe-only: the end emit fires from a detached `.then` before the caller's `await run.result` resumes, so a shared reference would let a mutating listener corrupt the caller's result. A `subagent/start` listener can still reach the live child via `ctx.agents.get(info.id)`; a `subagent/end` listener can only observe (the run has settled). Any run-affecting decision (continuation, injection that changes the run) is out of scope for this observe-only surface. ## Scope (first cut) diff --git a/packages/subagent/subagent/src/index.ts b/packages/subagent/subagent/src/index.ts index ee6540f44a..926c22d0c8 100644 --- a/packages/subagent/subagent/src/index.ts +++ b/packages/subagent/subagent/src/index.ts @@ -20,9 +20,9 @@ * semantics are deferred to a future redesign that unifies long-running-tool * handling across subagents and bash. * - * The `subagent/start` / `subagent/end` lifecycle events carry an enriched but - * OBSERVE-ONLY payload (`agentType`, and on end `lastAssistantMessage`) — see - * `docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md`. + * The `subagent/start` / `subagent/end` lifecycle events carry an OBSERVE-ONLY + * payload; `subagent/end` additionally carries the child's `lastAssistantMessage` + * — see `docs/rfc/implemented/feature/2026-06-30-subagent-observe-enrich.md`. * FIXME(subagent-continuation): a control-flow `subagent/end` (an awaited * waterfall returning a stop/continue decision, like the other interception * seams) would require reshaping this emit into a waterfall, awaiting listeners @@ -82,13 +82,6 @@ export interface SubagentRunInfo { provider: string /** The child agent's id. */ id: AgentId - /** - * The caller's subagent-kind label, carried verbatim from - * {@link SubagentStartRequest.agentType} (Claude Code's `subagent_type`). - * Absent when the caller did not supply one. An observer (a hooks bridge, - * a UI) reports or matches on it; the seam never interprets it. - */ - agentType?: string } /** Outcome detail for a settled subagent run (the `subagent/end` payload). */ @@ -97,8 +90,6 @@ export interface SubagentRunEndInfo { provider: string /** The child agent's id. */ id: AgentId - /** The caller's subagent-kind label (see {@link SubagentRunInfo.agentType}). */ - agentType?: string /** The terminal stop reason. */ stopReason: SubagentResult['stopReason'] /** @@ -187,10 +178,7 @@ export class SubagentService extends Service { // acceptable. `ctx.emit` halts the dispatch on the first throw, so a single // surrounding try/catch is not enough — each listener is invoked and // contained individually. - // Carry the caller's subagent-kind label verbatim onto both lifecycle events - // (absent when not supplied — the spread omits the key for exactOptionalPropertyTypes). - const agentType = request.agentType !== undefined ? { agentType: request.agentType } : {} - this.emitLifecycle('subagent/start', { provider: name, id: run.id, ...agentType }) + this.emitLifecycle('subagent/start', { provider: name, id: run.id }) // Emit `subagent/end` when the run settles. The result promise does not // reject on a child-level failure (it resolves with stopReason 'error'), // so a rejection here is an infrastructure fault — surface its stop reason @@ -220,9 +208,9 @@ export class SubagentService extends Service { } catch (error: unknown) { this.ctx.logger.warn(`subagent: could not clone ${name} output for subagent/end: ${String(error)}`) } - this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: result.stopReason, ...lastAssistantMessage !== undefined ? { lastAssistantMessage } : {} }) + this.emitLifecycle('subagent/end', { provider: name, id: run.id, stopReason: result.stopReason, ...lastAssistantMessage !== undefined ? { lastAssistantMessage } : {} }) }, - () => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, ...agentType, stopReason: 'error' }) }, + () => { this.emitLifecycle('subagent/end', { provider: name, id: run.id, stopReason: 'error' }) }, ) return run } diff --git a/packages/subagent/subagent/src/types.ts b/packages/subagent/subagent/src/types.ts index 55ef04a8a9..fb60d5667c 100644 --- a/packages/subagent/subagent/src/types.ts +++ b/packages/subagent/subagent/src/types.ts @@ -40,15 +40,6 @@ export interface SubagentCapabilities { export interface SubagentStartRequest { /** The task/prompt for the child agent (a user message in the child session). */ prompt: ContentBlock[] - /** - * Optional caller-supplied LABEL for the kind of subagent (e.g. `code-reviewer`, - * `researcher`) — the harness analogue of Claude Code's `subagent_type`. The - * seam does not interpret it; it is carried verbatim onto the `subagent/start` - * and `subagent/end` lifecycle events so an observer (a hooks bridge, a UI) can - * report or match on which kind of subagent ran. Absent when the caller does - * not distinguish subagent kinds. - */ - agentType?: string /** * The spawning ("parent") agent — the one whose tool call started this * subagent. REQUIRED: in-process backends read `parent.session.header` for diff --git a/packages/subagent/subagent/tests/service.spec.ts b/packages/subagent/subagent/tests/service.spec.ts index 9db02ebe34..3a8807ad0d 100644 --- a/packages/subagent/subagent/tests/service.spec.ts +++ b/packages/subagent/subagent/tests/service.spec.ts @@ -173,7 +173,7 @@ describe('SubagentService', () => { expect(ended).toHaveBeenCalledWith(expect.objectContaining({ provider: 'events', id: run.id, stopReason: 'completed' })) }) - it('carries agentType (from the request) onto both lifecycle events, and lastAssistantMessage onto end', async () => { + it('carries lastAssistantMessage (the child output) onto the end event', async () => { const ctx = new Context() await ctx.plugin(SubagentService) ctx.subagents.registerProvider(new StubProvider( @@ -187,42 +187,19 @@ describe('SubagentService', () => { ctx.on('subagent/start', started) ctx.on('subagent/end', ended) - const run = ctx.subagents.start('enriched', baseRequest({ agentType: 'code-reviewer' })) - expect(started).toHaveBeenCalledWith(expect.objectContaining({ provider: 'enriched', id: run.id, agentType: 'code-reviewer' })) + const run = ctx.subagents.start('enriched', baseRequest()) + expect(started).toHaveBeenCalledWith(expect.objectContaining({ provider: 'enriched', id: run.id })) await run.result await Promise.resolve() expect(ended).toHaveBeenCalledWith(expect.objectContaining({ provider: 'enriched', id: run.id, - agentType: 'code-reviewer', stopReason: 'completed', lastAssistantMessage: [{ type: 'text', text: 'the child answer' }], })) }) - it('omits agentType when the request supplied none', async () => { - const ctx = new Context() - await ctx.plugin(SubagentService) - ctx.subagents.registerProvider(new StubProvider('plain')) - - const started = vi.fn() - const ended = vi.fn() - ctx.on('subagent/start', started) - ctx.on('subagent/end', ended) - - const run = ctx.subagents.start('plain', baseRequest()) - await run.result - await Promise.resolve() - - const startInfo = started.mock.calls[0]![0] as Record - const endInfo = ended.mock.calls[0]![0] as Record - expect('agentType' in startInfo).toBe(false) - expect('agentType' in endInfo).toBe(false) - // lastAssistantMessage IS present on a resolved end (the child's output). - expect(endInfo.lastAssistantMessage).toEqual([{ type: 'text', text: 'ok' }]) - }) - it('observe-only: a subagent/end listener mutating lastAssistantMessage cannot corrupt the caller\'s result', async () => { // The subagent/end emit fires from a detached `.then` registered before // start() returns — i.e. BEFORE the caller's own `await run.result` @@ -267,14 +244,13 @@ describe('SubagentService', () => { const ended = vi.fn() ctx.on('subagent/end', ended) - const run = ctx.subagents.start('rej', baseRequest({ agentType: 'researcher' })) + const run = ctx.subagents.start('rej', baseRequest()) await run.result.catch(() => {}) await Promise.resolve() const endInfo = ended.mock.calls[0]![0] as Record expect(endInfo.stopReason).toBe('error') - expect(endInfo.agentType).toBe('researcher') // agentType still carried on reject - expect('lastAssistantMessage' in endInfo).toBe(false) // but no output exists + expect('lastAssistantMessage' in endInfo).toBe(false) // no output exists on reject }) it('contains a structuredClone failure: emits subagent/end without lastAssistantMessage (no unhandled rejection)', async () => { @@ -282,7 +258,7 @@ describe('SubagentService', () => { // containment. An uncloneable output (here a content block carrying a // function) would otherwise throw and become an unhandled rejection on the // detached `.then`. The handler must instead log and emit the event WITHOUT - // lastAssistantMessage, still carrying the real stopReason/agentType. + // lastAssistantMessage, still carrying the real stopReason. const ctx = new Context() await ctx.plugin(SubagentService) const warn = vi.fn(); ctx.logger.warn = warn as never @@ -301,13 +277,12 @@ describe('SubagentService', () => { const ended = vi.fn() ctx.on('subagent/end', ended) - const run = ctx.subagents.start('unclone', baseRequest({ agentType: 'researcher' })) + const run = ctx.subagents.start('unclone', baseRequest()) await run.result await Promise.resolve() const endInfo = ended.mock.calls[0]![0] as Record expect(endInfo.stopReason).toBe('completed') // the real outcome is preserved - expect(endInfo.agentType).toBe('researcher') expect('lastAssistantMessage' in endInfo).toBe(false) // clone failed → omitted, not crashed expect(warn).toHaveBeenCalledWith(expect.stringContaining('could not clone')) }) diff --git a/packages/subagent/tool-subagent/README.md b/packages/subagent/tool-subagent/README.md index 996e44d96e..1bb48f29ff 100644 --- a/packages/subagent/tool-subagent/README.md +++ b/packages/subagent/tool-subagent/README.md @@ -11,7 +11,6 @@ This plugin binds to **exactly one** provider (`Config.provider`). The model see | `provider` (required) | The `ctx.subagents` provider name to start runs on (`spawn`, `fork`, `acp`, …). | | `toolName` | The model-facing tool name to register (default `subagent`). Set a distinct value per load when exposing multiple providers, e.g. `subagent` + `subagent_acp`. | | `agentOptions` | Default per-child `{ model?, systemPrompt? }` applied to every spawned child. | -| `agentType` | Optional subagent-kind label (Claude Code's `subagent_type`) stamped on every run's `subagent/start`/`subagent/end` events, so an observer (a hooks bridge, a UI) can report or match on which kind ran. Set a distinct value per load when exposing multiple subagent kinds. | ## Lifecycle (synchronous collect) diff --git a/packages/subagent/tool-subagent/src/index.ts b/packages/subagent/tool-subagent/src/index.ts index cb92035e88..05490127ea 100644 --- a/packages/subagent/tool-subagent/src/index.ts +++ b/packages/subagent/tool-subagent/src/index.ts @@ -48,14 +48,6 @@ export interface Config { * spawned child. Omitted fields fall back to the child loop's own defaults. */ agentOptions?: AgentOptions - /** - * Optional subagent-kind LABEL stamped on every run this tool starts (Claude - * Code's `subagent_type`). Carried onto the `subagent/start`/`subagent/end` - * lifecycle events so an observer can report or match on which kind of - * subagent ran. A deployment that exposes multiple subagent kinds (one tool - * load per kind) sets a distinct `agentType` per load; omit when undifferentiated. - */ - agentType?: string } export const Config: z = z.object({ @@ -65,7 +57,6 @@ export const Config: z = z.object({ model: z.string(), systemPrompt: z.string(), }), - agentType: z.string(), }) /** @@ -137,7 +128,6 @@ export function apply(ctx: Context, config: Config): void { parent, ...exec.signal ? { signal: exec.signal } : {}, ...config.agentOptions ? { agentOptions: config.agentOptions } : {}, - ...config.agentType !== undefined ? { agentType: config.agentType } : {}, } const run: SubagentRun = ctx.subagents.start(config.provider, request) diff --git a/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts b/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts index 0b088b65db..2f40cd6f8c 100644 --- a/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts +++ b/packages/subagent/tool-subagent/tests/tool-subagent.spec.ts @@ -153,60 +153,6 @@ describe('dsh-tool-subagent', () => { expect(seen?.agentOptions).toEqual({ model: 'child-model', systemPrompt: 'be terse' }) }) - it('forwards a configured agentType into the start request (observed on the lifecycle events)', async () => { - let seen: { agentType?: string } | undefined - const starts: { agentType?: string }[] = [] - const ctx = new Context() - await ctx.plugin(SystemPrompt) - await ctx.plugin(ToolRegistry) - await ctx.plugin(SubagentService) - ctx.on('subagent/start', info => void starts.push(info)) - ctx.subagents.registerProvider({ - name: 'typed', - capabilities: { outputSchema: false, depthLimit: false, toolFilter: false }, - start: (request) => { - seen = request - return { - id: AgentId('typed-child'), - result: Promise.resolve({ output: [{ type: 'text', text: 'ok' }], stopReason: 'completed' as const }), - cancel() {}, - dispose: async () => {}, - } - }, - }) - await ctx.plugin(tool, { provider: 'typed', agentType: 'code-reviewer' }) - - await callSubagent(ctx, { description: 'd', prompt: 'p' }) - // The config agentType reaches the request, and the service stamps it on the event. - expect(seen?.agentType).toBe('code-reviewer') - expect(starts[0]?.agentType).toBe('code-reviewer') - }) - - it('omits agentType from the request when none is configured', async () => { - let seen: { agentType?: string } | undefined - const ctx = new Context() - await ctx.plugin(SystemPrompt) - await ctx.plugin(ToolRegistry) - await ctx.plugin(SubagentService) - ctx.subagents.registerProvider({ - name: 'untyped', - capabilities: { outputSchema: false, depthLimit: false, toolFilter: false }, - start: (request) => { - seen = request - return { - id: AgentId('untyped-child'), - result: Promise.resolve({ output: [{ type: 'text', text: 'ok' }], stopReason: 'completed' as const }), - cancel() {}, - dispose: async () => {}, - } - }, - }) - await ctx.plugin(tool, { provider: 'untyped' }) - - await callSubagent(ctx, { description: 'd', prompt: 'p' }) - expect(seen !== undefined && 'agentType' in seen).toBe(false) - }) - it('defaults toolName and omits agentOptions when apply() is called directly (schema bypass)', async () => { // `ctx.plugin` validates+defaults config first (toolName→'subagent', the // agentOptions object→{}), so the runtime `?? 'subagent'` fallback and the From bae6141398854280dec9abf42ef037281221bac3 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 06:45:17 +0800 Subject: [PATCH 32/47] fix(hooks-claude): build subagent payloads from base(), run SubagentStop in the child cwd, drop agentType MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address the D agentType removal + two #124 review findings on the CC bridge's subagent points: - **Payloads from base()**: `subagentStart/StopPayload` bypassed `base()`, so the SubagentStart/SubagentStop stdin payloads omitted the CC-promised `session_id` and `cwd`. Replaced both with a single `subagentPayload()` built from `base(child)` (the child's session_id/cwd when the child is available) + `agent_id` + `agent_type` (+ `stop_hook_active` on Stop). - **SubagentStop runs in the child cwd**: the listener called `runPoint(..., {})` with no agent, so the hook ran in the executor/server cwd. It now looks the child up via `ctx.get('agents').get(info.id)` — still recoverable because `subagent/end` fires from the service's detached `.then` BEFORE the tool caller disposes the child — and passes `{ agent: child }`, matching SubagentStart. New regression: server cwd ≠ child cwd, a `pwd` SubagentStop hook proves it ran in the CHILD workspace (proven red by neutering the lookup). - **agent_type is a constant**: `info.agentType` no longer exists (removed on the subagent branch); both points now report the `SUBAGENT_TYPE = "general-purpose"` constant (Claude Code's Task-tool default), so a hooks.json default/`*`/empty `agent_type` matcher fires. Updated the README matcher-subject note and the bridge/coverage tests (dropped their agentType emits). - **e2e comment**: hooks.e2e.ts said `./hooks.json` loads from the session cwd; corrected to process-level (server launch cwd), with the hook itself running in the session cwd. --- examples/acp-agent/tests/hooks.e2e.ts | 11 ++-- packages/hooks/hooks-claude/README.md | 2 +- packages/hooks/hooks-claude/src/index.ts | 46 +++++++++++++---- .../hooks/hooks-claude/tests/bridge.spec.ts | 4 +- .../hooks/hooks-claude/tests/coverage.spec.ts | 51 ++++++++++++++++--- 5 files changed, 89 insertions(+), 25 deletions(-) diff --git a/examples/acp-agent/tests/hooks.e2e.ts b/examples/acp-agent/tests/hooks.e2e.ts index 19a80df03c..40a8d37457 100644 --- a/examples/acp-agent/tests/hooks.e2e.ts +++ b/examples/acp-agent/tests/hooks.e2e.ts @@ -19,11 +19,14 @@ import { /** * With-key e2e: the Claude Code hook bridge running against the REAL acp-agent * subprocess and the REAL model. The example `cordis.yml` loads `dsh-hooks-claude` - * pointed at `./hooks.json` in the session cwd; this test writes a `hooks.json` - * with a PreToolUse hook that BLOCKS every bash command, then asks the live model - * to write a file — and verifies the WORLD (the file never appears on disk), + * with a PROCESS-LEVEL `configPath` of `./hooks.json`, resolved once at load + * against the ACP server's launch cwd (NOT per-session); this test sets that + * launch cwd to the temp workspace and writes a `hooks.json` there with a + * PreToolUse hook that BLOCKS every bash command, then asks the live model to + * write a file — and verifies the WORLD (the file never appears on disk), * proving the hook actually intercepted execution rather than the agent merely - * claiming it couldn't. Key-gated; owns and disposes its subprocess. + * claiming it couldn't. (The hook itself then runs in the session cwd.) + * Key-gated; owns and disposes its subprocess. * * A keyless companion lives in acp.e2e.ts (stdout purity + session/new); the * full hook-fires-end-to-end transcript is the keyless `hook-prompt-block` diff --git a/packages/hooks/hooks-claude/README.md b/packages/hooks/hooks-claude/README.md index 82980ff601..f9520f69be 100644 --- a/packages/hooks/hooks-claude/README.md +++ b/packages/hooks/hooks-claude/README.md @@ -41,7 +41,7 @@ The hooks **themselves** run in the agent's session workspace: for the agent-sco | `SubagentStart` | `subagent/start` (emit) | additionalContext → `agent.inject()` into the live child | | `SubagentStop` | `subagent/end` (emit) | observe-only | -The matcher subject is the tool name (`PreToolUse`/`PostToolUse`), the session source (`SessionStart`), or the child's agent type (`SubagentStart`/`SubagentStop`); `UserPromptSubmit`/`Stop` ignore matchers. Multiple file-configured hooks on one point run **serially, in config order**, and fold most-restrictively (`deny > ask > allow`, see `dsh-hook-protocol`); serial keeps each hook's `hook/invoked`/`hook/result` pair adjacent in the log, and the fold is order-independent for the decision (see the RFC's "run serially, not concurrently" note). +The matcher subject is the tool name (`PreToolUse`/`PostToolUse`), the session source (`SessionStart`), or a constant `agent_type` of `general-purpose` (`SubagentStart`/`SubagentStop` — the harness subagent seam carries no per-kind label, so the bridge reports Claude Code's own Task-tool default; a default/`*`/empty `agent_type` matcher fires, a specific-kind matcher does not); `UserPromptSubmit`/`Stop` ignore matchers. Multiple file-configured hooks on one point run **serially, in config order**, and fold most-restrictively (`deny > ask > allow`, see `dsh-hook-protocol`); serial keeps each hook's `hook/invoked`/`hook/result` pair adjacent in the log, and the fold is order-independent for the decision (see the RFC's "run serially, not concurrently" note). ## Context source diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts index 5b56e5f014..7e21f7ea82 100644 --- a/packages/hooks/hooks-claude/src/index.ts +++ b/packages/hooks/hooks-claude/src/index.ts @@ -271,10 +271,15 @@ export function apply(ctx: Context, config: Config): void { // --- SubagentStart / SubagentStop: observe-only emits (the subagent seam is // observe-only this cut). A SubagentStart hook's additionalContext is injected - // into the live child; SubagentStop only observes. No matcher subject. --- + // into the live child; SubagentStop only observes. Both look the live child up + // so the hook runs in the child's session workspace and the payload carries + // the child's session_id/cwd (see subagentPayload). The matcher subject is the + // CC-default `agent_type` (SUBAGENT_TYPE) — the harness seam carries no + // per-kind label, so a config's default/`*`/empty agent_type matcher fires and + // a specific-kind matcher does not (documented in the RFC). --- ctx.on('subagent/start', (info) => { const child = ctx.get('agents')?.get(info.id) - void runPoint('SubagentStart', info.agentType ?? '', subagentStartPayload(info), { ...child ? { agent: child } : {} }) + void runPoint('SubagentStart', SUBAGENT_TYPE, subagentPayload('SubagentStart', info, child), { ...child ? { agent: child } : {} }) .then((merged) => { const context = contextFrom(merged) if (context && child) child.inject(context.content, { source: context.source }) @@ -282,13 +287,24 @@ export function apply(ctx: Context, config: Config): void { .catch((error: unknown) => { ctx.logger.warn(`hooks-claude: SubagentStart hook failed: ${String(error)}`) }) }) ctx.on('subagent/end', (info) => { - // No `.then`/inject here (SubagentStop only observes) and no session is - // passed, so runPoint cannot reject — no `.catch` is needed (one would be - // dead code). The observe-only run is fire-and-forget. - void runPoint('SubagentStop', info.agentType ?? '', subagentStopPayload(info), {}) + // Look up the child (still recoverable: `subagent/end` fires from the + // service's detached `.then` BEFORE the tool caller's `await run.result` + // disposes it) so the hook runs in the child's cwd, not the server default. + // No `.then`/inject (SubagentStop only observes) and no session is passed, so + // runPoint cannot reject — no `.catch` is needed. Fire-and-forget. + const child = ctx.get('agents')?.get(info.id) + void runPoint('SubagentStop', SUBAGENT_TYPE, subagentPayload('SubagentStop', info, child), { ...child ? { agent: child } : {} }) }) } +/** + * The `agent_type` value the bridge reports for SubagentStart/Stop. The harness + * subagent seam carries no per-kind label, so the bridge uses Claude Code's own + * Task-tool default — a hooks.json with a default/`*`/empty `agent_type` matcher + * fires; a config matching a specific kind (e.g. `code-reviewer`) does not. + */ +const SUBAGENT_TYPE = 'general-purpose' + // --- Per-event stdin payloads (the CC DIALECT shape). Field names match CC's // hook input schema; this is the part a bridge owns. --- @@ -330,9 +346,17 @@ function postToolPayload(exec: ToolExecution, result: ToolExecutionResult): Reco function stopPayload(agent: Agent): Record { return { ...base(agent, 'Stop'), stop_hook_active: false } } -function subagentStartPayload(info: { id: string; agentType?: string }): Record { - return { hook_event_name: 'SubagentStart', agent_id: info.id, ...info.agentType !== undefined ? { agent_type: info.agentType } : {} } -} -function subagentStopPayload(info: { id: string; agentType?: string }): Record { - return { hook_event_name: 'SubagentStop', agent_id: info.id, stop_hook_active: false, ...info.agentType !== undefined ? { agent_type: info.agentType } : {} } +/** + * Build a SubagentStart/SubagentStop payload from the CC base (the child's + * `session_id`/`cwd` when the child agent is available) plus the subagent-hook + * fields. `agent_type` is the CC-default {@link SUBAGENT_TYPE}; `stop_hook_active` + * is present on SubagentStop only (the loop-guard flag, always false this cut). + */ +function subagentPayload(event: 'SubagentStart' | 'SubagentStop', info: { id: string }, child: Agent | undefined): Record { + return { + ...base(child, event), + agent_id: info.id, + agent_type: SUBAGENT_TYPE, + ...event === 'SubagentStop' ? { stop_hook_active: false } : {}, + } } diff --git a/packages/hooks/hooks-claude/tests/bridge.spec.ts b/packages/hooks/hooks-claude/tests/bridge.spec.ts index 0b6afd7e4c..3e36231e66 100644 --- a/packages/hooks/hooks-claude/tests/bridge.spec.ts +++ b/packages/hooks/hooks-claude/tests/bridge.spec.ts @@ -289,8 +289,8 @@ describe('hooks-claude bridge — SubagentStart / SubagentStop (observe)', () => // Drive the observe-only lifecycle events directly (no real child needed — the // bridge just listens). The agents registry is absent here, so SubagentStart's // child lookup yields undefined and it simply runs the hook. - ctx.emit('subagent/start', { provider: 'inproc', id: AgentId('child-1'), agentType: 'researcher' }) - ctx.emit('subagent/end', { provider: 'inproc', id: AgentId('child-1'), agentType: 'researcher', stopReason: 'completed', lastAssistantMessage: [{ type: 'text', text: 'done' }] }) + ctx.emit('subagent/start', { provider: 'inproc', id: AgentId('child-1') }) + ctx.emit('subagent/end', { provider: 'inproc', id: AgentId('child-1'), stopReason: 'completed', lastAssistantMessage: [{ type: 'text', text: 'done' }] }) // Both hooks run async (detached .then); poll for their marker files rather // than a fixed sleep that flakes under load. diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts index a1b650f33d..097e026d1a 100644 --- a/packages/hooks/hooks-claude/tests/coverage.spec.ts +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -185,7 +185,7 @@ describe('hooks-claude coverage — Stop continuation + subagent inject/catch', const injected: string[] = [] const child = { id: AgentId('child-x'), inject: (content: { type: string; text?: string }[]) => { injected.push(content.map(b => b.text ?? '').join('')) }, session: { header: { id: 'child-x' } } } as unknown as Parameters[0] ctx.agents.register(child) - ctx.emit('subagent/start', { provider: 'p', id: AgentId('child-x'), agentType: 'r' }) + ctx.emit('subagent/start', { provider: 'p', id: AgentId('child-x') }) await waitFor(() => injected.includes('child guidance')) expect(injected).toContain('child guidance') }) @@ -236,17 +236,16 @@ describe('hooks-claude coverage — default reasons + sparse payloads', () => { expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('blocked by PostToolUse hook'))).toBe(true) }) - it('SubagentStop with no agentType + a rejecting hook run is contained', async () => { + it('SubagentStop with no registered child runs the hook cleanly (fire-and-forget)', async () => { const d = dir() - // Make the SubagentStop runPoint reject by registering a session whose append - // throws — simplest: a hook that emits invalid output is fine; force the - // .catch by making the session's append throw via a poisoned agent is hard, - // so instead assert the no-agentType payload path runs cleanly (no crash). + // The agents registry has no entry for the id, so the child lookup yields + // undefined and the payload falls back to base(undefined) — assert the + // observe-only SubagentStop run still executes the hook without crashing. const marker = join(d, 'stopran') const s = sh(d, 'stop.sh', `#!/usr/bin/env bash\ntouch "${marker}"\n`) const path = hooks(d, { SubagentStop: [{ hooks: [{ type: 'command', command: s }] }] }) const ctx = await harness(path, new MockAdapter([])) - ctx.emit('subagent/end', { provider: 'p', id: AgentId('child-z'), stopReason: 'completed' }) // no agentType + ctx.emit('subagent/end', { provider: 'p', id: AgentId('child-z'), stopReason: 'completed' }) await waitFor(() => existsSync(marker)) expect(existsSync(marker)).toBe(true) }) @@ -492,6 +491,44 @@ describe('hooks-claude coverage — hook runs in the session cwd, not the server expect(where.endsWith(sessionDir.split('/').pop()!)).toBe(true) await handle.dispose() }) + + it('runs a SubagentStop hook in the CHILD session workspace, not the server cwd', async () => { + // The bug: SubagentStop ran runPoint(..., {}) with no agent, so the hook fell + // back to the executor default (server cwd). SubagentStop must look the child + // up (still recoverable at subagent/end) and run in the CHILD's session cwd. + // Here the executor default and the child session cwd are DIFFERENT dirs; a + // SubagentStop hook writes `pwd` to a marker and we assert it ran in the CHILD + // dir. (Proven to regress: neuter the child lookup and the marker lands in the + // server dir instead.) + const serverDir = dir() + const childDir = dir() + const marker = join(childDir, 'stopwhere') + hooks(serverDir, { SubagentStop: [{ hooks: [{ type: 'command', command: 'pwd > stopwhere' }] }] }) + const ctx = new Context() + await ctx.plugin(LlmService) + await ctx.plugin(SessionStore) + await ctx.plugin(SystemPrompt) + await ctx.plugin(ToolRegistry) + await ctx.plugin(AgentRegistry) + await ctx.plugin(AgentLoop, { agents: [] }) + // Executor default cwd = serverDir (deliberately NOT the child session cwd). + await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, cwd: serverDir }) + await ctx.plugin(HooksClaude, { configPath: join(serverDir, 'hooks.json') }) + ctx.llm.registerAdapter(['mock'], new MockAdapter([])) + + // Register a live child on its own session cwd; emit subagent/end with its id. + const { SessionId } = await import('@deepseek-ai/dsh-session') + const childHandle = ctx.agents.create({ agentId: AgentId('child-stop'), sessionId: SessionId('child-stop-session'), meta: { cwd: childDir }, agentOptions: { model: 'mock' } }) + ctx.emit('subagent/end', { provider: 'inproc', id: childHandle.agent.id, stopReason: 'completed' }) + + await waitFor(() => existsSync(marker)) + expect(existsSync(marker)).toBe(true) // the marker landed in the CHILD dir + const { readFileSync } = await import('node:fs') + const where = readFileSync(marker, 'utf8').trim() + // `pwd` may resolve symlinks (/var → /private/var etc.), so compare basenames. + expect(where.endsWith(childDir.split('/').pop()!)).toBe(true) + await childHandle.dispose() + }) }) describe('hooks-claude coverage — systemMessage is warned, not surfaced', () => { From 8e8c791eb0bd6e2abb41689af4ea729bfbe8d36c Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 07:01:55 +0800 Subject: [PATCH 33/47] docs(hooks-claude): current-state comment wording caught in review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Two Codex nitpicks, comment-only (no behavior change): - the SubagentStop-cwd regression test comment narrated "The bug" / "Proven to regress" — rewrote to state the invariant it checks, not the history. - the subagent/end listener comment said "no session is passed"; with a child a session IS passed — corrected to "no `turn` is passed (so no hook/* records)", which is the actual reason runPoint has nothing that can reject. --- packages/hooks/hooks-claude/src/index.ts | 5 +++-- packages/hooks/hooks-claude/tests/coverage.spec.ts | 12 +++++------- 2 files changed, 8 insertions(+), 9 deletions(-) diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts index 7e21f7ea82..6816201e60 100644 --- a/packages/hooks/hooks-claude/src/index.ts +++ b/packages/hooks/hooks-claude/src/index.ts @@ -290,8 +290,9 @@ export function apply(ctx: Context, config: Config): void { // Look up the child (still recoverable: `subagent/end` fires from the // service's detached `.then` BEFORE the tool caller's `await run.result` // disposes it) so the hook runs in the child's cwd, not the server default. - // No `.then`/inject (SubagentStop only observes) and no session is passed, so - // runPoint cannot reject — no `.catch` is needed. Fire-and-forget. + // No `.then`/inject follows (SubagentStop only observes), and no `turn` is + // passed (so no `hook/*` log records), so runPoint has nothing that can + // reject — no `.catch` is needed. Fire-and-forget. const child = ctx.get('agents')?.get(info.id) void runPoint('SubagentStop', SUBAGENT_TYPE, subagentPayload('SubagentStop', info, child), { ...child ? { agent: child } : {} }) }) diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts index 097e026d1a..c1c6d1581d 100644 --- a/packages/hooks/hooks-claude/tests/coverage.spec.ts +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -493,13 +493,11 @@ describe('hooks-claude coverage — hook runs in the session cwd, not the server }) it('runs a SubagentStop hook in the CHILD session workspace, not the server cwd', async () => { - // The bug: SubagentStop ran runPoint(..., {}) with no agent, so the hook fell - // back to the executor default (server cwd). SubagentStop must look the child - // up (still recoverable at subagent/end) and run in the CHILD's session cwd. - // Here the executor default and the child session cwd are DIFFERENT dirs; a - // SubagentStop hook writes `pwd` to a marker and we assert it ran in the CHILD - // dir. (Proven to regress: neuter the child lookup and the marker lands in the - // server dir instead.) + // SubagentStop looks the child up (recoverable at subagent/end) and runs the + // hook in the CHILD's session cwd, not the executor default. Here the executor + // default and the child session cwd are DIFFERENT dirs; a SubagentStop hook + // writes `pwd` to a relative marker and we assert it landed in the CHILD dir — + // which only holds if the listener threaded the child agent into runPoint. const serverDir = dir() const childDir = dir() const marker = join(childDir, 'stopwhere') From 1e87b6fea4a498c33259bbf7d864c01fc55a7550 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 13:57:59 +0800 Subject: [PATCH 34/47] fix(ui-stdio): seed turn labels from the registry; drop stale taxonomy line MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address review on the event-taxonomy PR: - ui-stdio built its session-id→agent-id label map only from live `agent/created` events, so an agent registered before the UI fiber installed — the pre-created `main` agent, or any agent surviving an HMR reload of just this fiber — was missed and its turns rendered the raw session id instead of `[main turn N]`. Seed the map from `ctx.agents.list()` at install, then keep it live. Regression test proven red without the seed. - The agent event-domain doc still listed "the turn boundaries" among the TRANSIENT `agent/*` emits, contradicting the rule ten lines below that a turn/step boundary is a durable `session/event`, not an `agent/*` mirror. --- docs/cordis-catalog/events-and-services.md | 22 +++++++++---------- packages/core/agent/src/types.ts | 7 +++--- packages/support/ui-stdio/README.md | 2 +- packages/support/ui-stdio/src/index.ts | 8 ++++++- .../support/ui-stdio/tests/readline.spec.ts | 3 +++ .../support/ui-stdio/tests/ui-stdio.spec.ts | 20 +++++++++++++++++ 6 files changed, 46 insertions(+), 16 deletions(-) diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index e9a4447aec..6517b35035 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages. Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:164`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:165`](../../packages/core/agent/src/types.ts) #### `agent/disposed` — emit @@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:170`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:171`](../../packages/core/agent/src/types.ts) #### `agent/error` — emit @@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:263`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:264`](../../packages/core/agent/src/types.ts) #### `agent/pre-step` — serial @@ -63,7 +63,7 @@ Serial (awaited in registration order), not a waterfall: a listener mutates the Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:223`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:224`](../../packages/core/agent/src/types.ts) #### `agent/queued` — emit @@ -75,7 +75,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:183`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:184`](../../packages/core/agent/src/types.ts) #### `agent/request` — waterfall @@ -87,7 +87,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:232`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:233`](../../packages/core/agent/src/types.ts) #### `agent/status` — emit @@ -99,7 +99,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:177`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:178`](../../packages/core/agent/src/types.ts) #### `agent/steering` — emit @@ -111,7 +111,7 @@ Steering content was injected into a running turn. Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:257`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:258`](../../packages/core/agent/src/types.ts) #### `agent/step-result` — waterfall @@ -123,7 +123,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:238`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:239`](../../packages/core/agent/src/types.ts) #### `agent/stream-chunk` — emit @@ -135,7 +135,7 @@ A raw StreamChunk arrived from the model (token-level UI/log feed). Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md) -Source: [`packages/core/agent/src/types.ts:252`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:253`](../../packages/core/agent/src/types.ts) #### `agent/turn-continuation` — waterfall @@ -147,7 +147,7 @@ Waterfall: override the turn-continuation decision. The default (computed by the Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:245`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:246`](../../packages/core/agent/src/types.ts) ### `llm/*` diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts index 0dcc1d0501..82a065b854 100644 --- a/packages/core/agent/src/types.ts +++ b/packages/core/agent/src/types.ts @@ -19,9 +19,10 @@ * live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, * `agent/step-result`, `agent/turn-continuation`) that mutate/veto, and * TRANSIENT emits (`agent/status`, `agent/stream-chunk`, `agent/error`, - * `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`, and the - * turn boundaries) that notify with the `Agent` in hand. Answers "right now, - * with the agent object — intercept or observe." + * `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`) that + * notify with the `Agent` in hand. Turn/step boundaries are NOT here — they + * are durable `session/event` records (see the rule below). Answers "right + * now, with the agent object — intercept or observe." * - **`tools/*`** (`@deepseek-ai/dsh-tools`) — the tool registry + execution. * * **The rule:** a durable, replayable fact is a SessionEvent; a live diff --git a/packages/support/ui-stdio/README.md b/packages/support/ui-stdio/README.md index 25f53833b7..7e88bbc459 100644 --- a/packages/support/ui-stdio/README.md +++ b/packages/support/ui-stdio/README.md @@ -25,7 +25,7 @@ This package consolidates what were two near-identical copies under `examples/ec Rendering is **global** — every agent's events are written to stdout, not just `config.agent`'s. `config.agent` scopes only *input* (which agent stdin drives) and the EOF-exit gate; the single-agent demos this serves have just one agent, so the distinction is moot for them. (A multi-agent UI that needs per-agent panes would filter these handlers by the agent argument — deliberately out of scope here.) - `agent/stream-chunk` — `text-delta` is written verbatim; `reasoning-delta` is wrapped in the dim SGR (`\x1B[2m … \x1B[0m`) so the chain-of-thought is visually subordinate to the answer. Reasoning rendering is inert when no `reasoning-delta` chunks arrive (e.g. a mock model), so it is always on. -- `session/event` — the durable transcript feed drives all boundary and content rendering: `turn/start` prints a `[ turn N]` header (the short agent label comes from an `agent/created`→id map, since the turn event carries only the turn number), `turn/end` prints the trailing `> ` prompt, `tool/call` renders `[tool call] name(args)`, `tool/result` renders the joined text blocks as `[tool result] …`, and `todo/write` renders a glyphed checklist. +- `session/event` — the durable transcript feed drives all boundary and content rendering: `turn/start` prints a `[ turn N]` header (the short agent label comes from a session-id→agent-id map seeded from `ctx.agents.list()` at install and kept live via `agent/created`/`agent/disposed`, since the turn event carries only the turn number), `turn/end` prints the trailing `> ` prompt, `tool/call` renders `[tool call] name(args)`, `tool/result` renders the joined text blocks as `[tool result] …`, and `todo/write` renders a glyphed checklist. ## The I/O seam diff --git a/packages/support/ui-stdio/src/index.ts b/packages/support/ui-stdio/src/index.ts index 5f3b2bdc1c..9be922426f 100644 --- a/packages/support/ui-stdio/src/index.ts +++ b/packages/support/ui-stdio/src/index.ts @@ -80,8 +80,14 @@ export function createStdioChat(ctx: Context, config: Config, runtime: StdioRunt // number, so to print the short agent id (`[main turn 1]`) we map the // session's id to its agent's id. The session id is not reliably the agent id // (a session can be created with an explicit/client-supplied id), so build the - // map from `agent/created` rather than parsing the id string. + // map from `agent/created` rather than parsing the id string. Seed from the + // registry's current agents first: an agent registered before this plugin + // installed (e.g. the pre-created `main` agent, or any agent surviving an HMR + // reload of just this fiber) already fired its `agent/created`, so the live + // listener alone would miss it and its turns would fall back to the raw + // session id. const labelBySession = new Map() + for (const agent of ctx.agents.list()) labelBySession.set(agent.session.header.id, agent.id) ctx.on('agent/created', (agent) => { labelBySession.set(agent.session.header.id, agent.id) }) ctx.on('agent/disposed', (agent) => { labelBySession.delete(agent.session.header.id) }) diff --git a/packages/support/ui-stdio/tests/readline.spec.ts b/packages/support/ui-stdio/tests/readline.spec.ts index c8b147ddab..5e092fb913 100644 --- a/packages/support/ui-stdio/tests/readline.spec.ts +++ b/packages/support/ui-stdio/tests/readline.spec.ts @@ -16,6 +16,9 @@ function fakeContext(): Context { return { on: vi.fn(() => vi.fn()), effect: vi.fn((callback: () => () => void) => callback()), + // The UI seeds its label map from the registry at install; this suite only + // exercises readline terminal-mode selection, so an empty roster suffices. + agents: { list: vi.fn(() => []) }, } as unknown as Context } diff --git a/packages/support/ui-stdio/tests/ui-stdio.spec.ts b/packages/support/ui-stdio/tests/ui-stdio.spec.ts index 0c58211d82..bf75c528c3 100644 --- a/packages/support/ui-stdio/tests/ui-stdio.spec.ts +++ b/packages/support/ui-stdio/tests/ui-stdio.spec.ts @@ -149,6 +149,26 @@ describe('createStdioChat rendering', () => { expect(out.text()).toContain('[orphan-session turn 1] ') }) + it('seeds labels for agents already registered before the UI installs', async () => { + // The pre-created `main` agent (and any agent surviving an HMR reload of just + // this fiber) fired its `agent/created` before the UI's listener existed, so + // the live listener alone would miss it. Seeding from `ctx.agents.list()` at + // install time is what keeps its turn header showing `[main turn N]` instead + // of the raw session id. + const ctx = new Context() + await ctx.plugin(AgentRegistry) + const agent = makeAgent('main') + ctx.agents.register(agent) // registered BEFORE the UI plugin below + const { runtime, out } = makeRuntime() + await ctx.plugin(Object.assign((inner: Context) => { + createStdioChat(inner, CONFIG, runtime) + }, { inject: ['agents'] })) + ctx.emit('session/event', makeSession('main'), { + type: 'turn/start', seq: 1, time: 0, data: { turn: 5, trigger: { kind: 'message' } }, + } as SessionEvent) + expect(out.text()).toContain('[main turn 5] ') + }) + it('resets dim styling at turn/end if a turn ends mid-reasoning', async () => { const { ctx, out } = await setup() const agent = makeAgent('main') From 40488e29e5cb17412135246d179bef9fa273b32c Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 16:39:29 +0800 Subject: [PATCH 35/47] fix(bash-local): keep /dev/null stdin when no bytes supplied MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address review on the bash stdin/env seam PR: the seam spawned stdin as a `'pipe'` for EVERY call, closing it empty when no stdin was supplied. That is NOT observationally equivalent to the pre-seam `'ignore'` default — node's spawn pipe is an AF_UNIX socket, so `test -c /dev/stdin` (and any fd-0 type probe) flipped for every model-driven bash call, even though the code claimed the no-stdin path was unchanged. Spawn stdin as `'pipe'` only when the caller supplies bytes; otherwise `'ignore'` (fd 0 → /dev/null), the exact prior default. A literal `stdio` tuple per branch preserves the typed `spawn` overload's non-null stdout/stderr. Regression test asserts fd 0 is a char device with no stdin and a socket when supplied — proven red on the always-pipe code. --- ...0-bash-stdin-env-trusted-plugin-surface.md | 2 +- packages/bash/bash-local/README.md | 2 +- packages/bash/bash-local/src/run.ts | 44 +++++++++++-------- packages/bash/bash-local/tests/run.spec.ts | 17 ++++++- 4 files changed, 43 insertions(+), 22 deletions(-) diff --git a/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md b/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md index aafa24cb1d..cda9f00e9e 100644 --- a/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md +++ b/docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md @@ -22,7 +22,7 @@ Three deliberate choices: 3. **`stdin`/`env` are required-absent-OK (plain optional) on the resolved spec, NOT required-but-nullable like `owner`.** `owner` is required-but-nullable because a *silently* missing owner yields an unowned, cross-session-readable task — a security footgun that a visible `undefined` guards against. `stdin`/`env` have no such hazard: a missing one means "no stdin / no extra env", which is the safe, ordinary case (every model-driven call). So they stay plain optionals, matching `signal`. -`dsh-bash-local` now ALWAYS spawns stdin as a `'pipe'` and closes it immediately — with the supplied bytes when a caller set `stdin`, empty otherwise. A closed empty pipe gives a reading child EOF exactly as the previous `'ignore'` (`/dev/null`) did, so the no-stdin path is behavior-equivalent; keeping the `stdio` tuple a literal `['pipe','pipe','pipe']` also preserves the typed `spawn` overload that guarantees non-null `stdout`/`stderr`. A child that exits without reading makes the stdin write fail EPIPE; that error is swallowed (the command's outcome rides on its exit code/output, not the write) so it never crashes the host or rejects `done`. +`dsh-bash-local` spawns stdin as a `'pipe'` (writing the supplied bytes, then closing) ONLY when a caller set `stdin`; with none supplied it uses `'ignore'` — fd 0 → `/dev/null` — the exact pre-seam default. This distinction is observable and deliberate: a closed empty pipe and `/dev/null` are NOT the same file type (node's spawn pipe is an `AF_UNIX` socket, so `test -c /dev/stdin` holds for `/dev/null` but not for an empty pipe), so the no-stdin path — every model-driven call — must keep `/dev/null` rather than regress to an always-open pipe. Each branch's `stdio` tuple is a literal, which preserves the typed `spawn` overload that guarantees non-null `stdout`/`stderr`. When stdin IS written, a child that exits without reading makes the write fail EPIPE; that error is swallowed (the command's outcome rides on its exit code/output, not the write) so it never crashes the host or rejects `done`. ## Scope: configurable scrub pattern is NOT included diff --git a/packages/bash/bash-local/README.md b/packages/bash/bash-local/README.md index 7cb6f809c5..e6ecc25cac 100644 --- a/packages/bash/bash-local/README.md +++ b/packages/bash/bash-local/README.md @@ -21,7 +21,7 @@ Design surveyed against the bash tools of Claude Code, OpenCode, Codex, and pi; - **Spawn per call, no shell state** — every call is a fresh non-login `bash -c` (deterministic; no rc files). All four surveyed tools spawn per call. `XXX(stateful-shell)` in `src/run.ts` records the two proven stateful designs (Claude Code's cwd-only persistence; Codex's PTY exec sessions) for when real workflows demand them. - **Process-group kills with escalation** — children are spawned `detached` (own process group); kills send SIGTERM to the group, then SIGKILL after a 3s grace (OpenCode's escalation; pipelines and subshells die with the parent). ESRCH is tolerated; daemons that re-parent away from the group can still survive — same caveat as the surveyed tools. - **Tail-keep truncation + spill files** — output beyond `maxOutputBytes` keeps the in-memory TAIL (errors/results cluster at the end — pi/OpenCode rationale) while the FULL stream is appended to a temp file whose path is reported when available. If the final spill close reports a delayed writeback failure, the executor still returns the tail but withholds the path rather than advertising a possibly incomplete file. -- **Model-friendly env + credential scrub** — `process.env` minus credential-shaped vars (`*KEY*`/`*SECRET*`/`*TOKEN*`), then `NO_COLOR=1 TERM=dumb PAGER=cat GIT_PAGER=cat` (Codex's hardcoded set) so pagers and ANSI color don't garble results. This scrub is the security control that keeps the harness's *ambient* credentials out of a spawned command. A spec's `env` is merged LAST (after the scrub), so a caller's explicit entry — a value it already holds — wins even on a credential-shaped name. The spec's `stdin` is written to the child and closed; with none supplied, stdin is an immediately-closed empty pipe (EOF, as before). Both `env`/`stdin` are set by in-process plugins (the hooks bridges); the model-facing tool doesn't expose them. See [the bash-stdin-env RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). +- **Model-friendly env + credential scrub** — `process.env` minus credential-shaped vars (`*KEY*`/`*SECRET*`/`*TOKEN*`), then `NO_COLOR=1 TERM=dumb PAGER=cat GIT_PAGER=cat` (Codex's hardcoded set) so pagers and ANSI color don't garble results. This scrub is the security control that keeps the harness's *ambient* credentials out of a spawned command. A spec's `env` is merged LAST (after the scrub), so a caller's explicit entry — a value it already holds — wins even on a credential-shaped name. The spec's `stdin`, when supplied, is written to the child and closed; with none supplied, fd 0 is `/dev/null` — the exact pre-seam default, so a command that probes stdin's file type is unaffected. Both `env`/`stdin` are set by in-process plugins (the hooks bridges); the model-facing tool doesn't expose them. See [the bash-stdin-env RFC](../../../docs/rfc/implemented/architecture/2026-06-30-bash-stdin-env-trusted-plugin-surface.md). - **Background tasks** — `start()` returns immediately, no timeout applies (Claude Code detaches timeouts when backgrounding), `readOutput()` is incremental with whole-stream byte offsets, and disposal kills everything. The spec's opaque `owner` token is stored on the tracked task and returned by `ownerOf(id)` — the executor never interprets it (the consumer's access policy does), and because it lives with the task here it survives a `tool-bash` HMR reload. ## Sandboxing diff --git a/packages/bash/bash-local/src/run.ts b/packages/bash/bash-local/src/run.ts index de3d880c7c..023ea0e3d1 100644 --- a/packages/bash/bash-local/src/run.ts +++ b/packages/bash/bash-local/src/run.ts @@ -15,7 +15,8 @@ * @module dsh-bash-local/run */ -import { spawn } from 'node:child_process' +import { type ChildProcessByStdio, spawn } from 'node:child_process' +import type { Readable, Writable } from 'node:stream' import { randomBytes } from 'node:crypto' import { closeSync, mkdtempSync, openSync, writeSync } from 'node:fs' import { tmpdir } from 'node:os' @@ -298,17 +299,20 @@ export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningB throw new Error(`aborted before spawn: ${String(spec.signal.reason ?? 'aborted')}`) } - // stdin is ALWAYS a pipe (kept literal so the typed spawn overload guarantees - // non-null stdout/stderr) and is closed immediately: with bytes when a caller - // supplied stdin, empty otherwise. A closed empty pipe gives a reading child - // EOF exactly as `/dev/null` would, so the no-stdin path (every model-driven - // call) is unchanged. - const child = spawn('bash', ['-c', spec.command], { - cwd: spec.cwd, - env: childEnv(spec.env), - stdio: ['pipe', 'pipe', 'pipe'], - detached: true, - }) + // stdin is a pipe ONLY when the caller supplied bytes; with none it is `ignore` + // (fd 0 → /dev/null) — the exact pre-seam default. This matters: a spawn pipe + // and /dev/null are NOT observationally identical (node's pipe is an AF_UNIX + // socket, so a command that probes stdin's type — `test -c /dev/stdin`, `stat + // /proc/self/fd/0` — sees a char device vs a socket), so the no-stdin path + // (every model-driven call) must keep /dev/null rather than regress to a socket. + // Two LITERAL `stdio` tuples (not one variable tuple): only a literal lets the + // typed `spawn` overload infer non-null stdout/stderr, which the + // `ChildProcessByStdio` annotation captures (stdin `Writable | null`; stdout/ + // stderr the non-null `Readable` the collectors attach to without a cast). + const env = childEnv(spec.env) + const child: ChildProcessByStdio = spec.stdin !== undefined + ? spawn('bash', ['-c', spec.command], { cwd: spec.cwd, env, stdio: ['pipe', 'pipe', 'pipe'], detached: true }) + : spawn('bash', ['-c', spec.command], { cwd: spec.cwd, env, stdio: ['ignore', 'pipe', 'pipe'], detached: true }) const stdout = new OutputCollector(spec.maxOutputBytes, 'stdout', spillDir) const stderr = new OutputCollector(spec.maxOutputBytes, 'stderr', spillDir) @@ -343,10 +347,12 @@ export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningB } spec.signal?.addEventListener('abort', onAbort, { once: true }) - // Write stdin and close it. This handler must exist: an unhandled 'error' on - // the stream would throw and crash the host. We swallow the error rather than - // reject `done`, and that is correct for ANY stdin-write error, not just the - // common one — the stdin write is BEST-EFFORT, while the command's authoritative + // Write stdin and close it, but ONLY when the caller supplied bytes — with no + // stdin, fd 0 is `ignore` (/dev/null) and `child.stdin` is null. The error + // handler must exist whenever we write: an unhandled 'error' on the stream + // would throw and crash the host. We swallow the error rather than reject + // `done`, and that is correct for ANY stdin-write error, not just the common + // one — the stdin write is BEST-EFFORT, while the command's authoritative // outcome is its exit code + captured output, which the `close` handler reports // regardless of whether the write landed. The expected case is EPIPE (the child // exited without reading, so closing our end of a still-full pipe fails); a rare @@ -354,8 +360,10 @@ export function runBash(spec: SpawnSpec, internals: RunInternals = {}): RunningB // surfaces that itself through its own exit/output (e.g. a hook that gets // truncated JSON errors out) — rejecting here would instead discard that real // output and turn it into an opaque infrastructure error, which is worse. - child.stdin.on('error', () => { /* stdin write is best-effort; outcome rides on exit/output. */ }) - child.stdin.end(spec.stdin ?? '') + if (child.stdin !== null) { + child.stdin.on('error', () => { /* stdin write is best-effort; outcome rides on exit/output. */ }) + child.stdin.end(spec.stdin) + } const done = new Promise((resolve, reject) => { child.on('error', (error) => { diff --git a/packages/bash/bash-local/tests/run.spec.ts b/packages/bash/bash-local/tests/run.spec.ts index 395f442dad..3a1ff7c2c5 100644 --- a/packages/bash/bash-local/tests/run.spec.ts +++ b/packages/bash/bash-local/tests/run.spec.ts @@ -166,13 +166,26 @@ describe('stdin and extra env (set by in-process plugins)', () => { }) it('a command that reads stdin sees EOF when none is supplied', async () => { - // No stdin → the always-piped-but-empty stdin closes immediately, so `cat` - // reads EOF and exits 0 with no output (it does NOT block). + // No stdin → fd 0 is /dev/null, so `cat` reads EOF and exits 0 with no + // output (it does NOT block). const result = await runBash(spec('cat')).done expect(result.exitCode).toBe(0) expect(result.stdout.text).toBe('') }) + it('gives fd 0 the exact pre-seam type: /dev/null when no stdin, a pipe when supplied', async () => { + // The no-stdin path must stay observationally identical to the pre-seam + // `ignore` default: a command that probes stdin's file type sees a char + // device (/dev/null). Regressing to an always-open pipe would make fd 0 a + // socket (node's spawn pipe is an AF_UNIX socket, not a FIFO), flipping + // `test -c /dev/stdin` for every model-driven call. When bytes ARE supplied, + // fd 0 is that pipe (a socket), as it must be to carry them. + const none = await runBash(spec('test -c /dev/stdin && echo char || echo other')).done + expect(none.stdout.text).toBe('char\n') + const piped = await runBash(spec('test -S /dev/stdin && echo socket || echo other', { stdin: 'x' })).done + expect(piped.stdout.text).toBe('socket\n') + }) + it('merges extra env entries onto the scrubbed environment', async () => { const result = await runBash(spec('echo "$DSH_EXTRA_ONE/$DSH_EXTRA_TWO"', { env: { DSH_EXTRA_ONE: 'alpha', DSH_EXTRA_TWO: 'beta' }, From abe80cec68cf2ca989f710dec4ecc5c691471602 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 17:03:53 +0800 Subject: [PATCH 36/47] fix(loop): record a durable prompt/blocked for every vetoed prompt MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address review on the interception-seams PR: PromptDecision.reason is documented as the durable record of why a prompt was blocked, but the loop only surfaced it via the fully-blocked batch's `rejected` turn/end. In a MIXED batch — one queued prompt blocked, another allowed — the turn does not end `rejected`, so the blocked prompt and its reason vanished from the session log entirely. Add a `prompt/blocked` SessionEventMap variant (content + source + reason), appended in the open turn at the veto point in place of the user/message the prompt would have become. It is a non-surface, turn-enclosed event (like todo/write): it never reaches deriveMessages(). The fully-blocked batch still also ends `rejected` for boundary balance + ACP settlement. Regression test drives a mixed batch and asserts the blocked prompt is recorded while the allowed one runs — proven red without the append. --- docs/cordis-catalog/events-and-services.md | 26 +++++------ docs/core-data-structures/core.md | 2 +- docs/core-data-structures/session.md | 11 +++++ .../feature/2026-06-30-interception-seams.md | 4 +- packages/core/agent-loop/README.md | 2 +- packages/core/agent-loop/src/loop.ts | 8 ++++ .../agent-loop/tests/interception.spec.ts | 45 +++++++++++++++++++ packages/core/agent/src/types.ts | 12 +++-- packages/core/session/README.md | 2 +- packages/core/session/src/types.ts | 11 +++++ 10 files changed, 101 insertions(+), 22 deletions(-) diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index dc4b91f6b3..282e161235 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages. Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:229`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:233`](../../packages/core/agent/src/types.ts) #### `agent/disposed` — emit @@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:235`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:239`](../../packages/core/agent/src/types.ts) #### `agent/error` — emit @@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:354`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:358`](../../packages/core/agent/src/types.ts) #### `agent/pre-step` — serial @@ -63,7 +63,7 @@ Serial (awaited in registration order), not a waterfall: a listener mutates the Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:301`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:305`](../../packages/core/agent/src/types.ts) #### `agent/prompt-submit` — waterfall @@ -75,7 +75,7 @@ Waterfall: decide what happens to ONE drained queued message before it becomes a Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:311`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:315`](../../packages/core/agent/src/types.ts) #### `agent/queued` — emit @@ -87,7 +87,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:248`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:252`](../../packages/core/agent/src/types.ts) #### `agent/request` — waterfall @@ -99,7 +99,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:320`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:324`](../../packages/core/agent/src/types.ts) #### `agent/session-start` — emit @@ -111,7 +111,7 @@ The agent's session lifecycle began, fired once before its first turn. `source` Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:261`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:265`](../../packages/core/agent/src/types.ts) #### `agent/status` — emit @@ -123,7 +123,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:242`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:246`](../../packages/core/agent/src/types.ts) #### `agent/steering` — emit @@ -135,7 +135,7 @@ Steering content was injected into a running turn. Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:348`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:352`](../../packages/core/agent/src/types.ts) #### `agent/step-result` — waterfall @@ -147,7 +147,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:326`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:330`](../../packages/core/agent/src/types.ts) #### `agent/stream-chunk` — emit @@ -159,7 +159,7 @@ A raw StreamChunk arrived from the model (token-level UI/log feed). Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md) -Source: [`packages/core/agent/src/types.ts:343`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:347`](../../packages/core/agent/src/types.ts) #### `agent/turn-continuation` — waterfall @@ -171,7 +171,7 @@ Waterfall: override the turn-continuation decision via a typed ContinuationDecis Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:336`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:340`](../../packages/core/agent/src/types.ts) ### `llm/*` diff --git a/docs/core-data-structures/core.md b/docs/core-data-structures/core.md index 68f5357e3a..1846bf0bdc 100644 --- a/docs/core-data-structures/core.md +++ b/docs/core-data-structures/core.md @@ -214,7 +214,7 @@ type SessionEvent = { }[T] ``` -The twelve event variants (`turn/start`, `turn/end`, `step/start`, `step/end`, `user/message`, `context/message`, `assistant/chunk`, `assistant/message`, `tool/call`, `tool/result`, `steering/message`, `todo/write`), the `deriveMessages()` projection rules, the `TurnTrigger`/`TurnEndReason` reasons, and the turn-enclosure invariant are on **[session.md](session.md)**. How the log is made durable — the `SessionPersistence` seam, JSONL/SQLite backends, the `session/flush` checkpoint, crash recovery, and `SessionHeader` — is on **[persistence.md](persistence.md)**. +The thirteen event variants (`turn/start`, `turn/end`, `step/start`, `step/end`, `user/message`, `prompt/blocked`, `context/message`, `assistant/chunk`, `assistant/message`, `tool/call`, `tool/result`, `steering/message`, `todo/write`), the `deriveMessages()` projection rules, the `TurnTrigger`/`TurnEndReason` reasons, and the turn-enclosure invariant are on **[session.md](session.md)**. How the log is made durable — the `SessionPersistence` seam, JSONL/SQLite backends, the `session/flush` checkpoint, crash recovery, and `SessionHeader` — is on **[persistence.md](persistence.md)**. ## The agent handle diff --git a/docs/core-data-structures/session.md b/docs/core-data-structures/session.md index c5188da309..59555b4111 100644 --- a/docs/core-data-structures/session.md +++ b/docs/core-data-structures/session.md @@ -16,6 +16,17 @@ interface SessionEventMap { 'step/end': { turn: number; step: number } /** A user-visible prompt (queued message drained at turn start). */ 'user/message': { content: ContentBlock[]; source: MessageSource } + /** + * A queued prompt an `agent/prompt-submit` listener VETOED — the durable + * record of a blocked prompt and why. Appended in place of the `user/message` + * the prompt would have become, so the block survives replay even in a MIXED + * batch where another queued prompt is allowed (there the turn does not end + * `rejected`, so the boundary reason alone would not preserve it). `content` + * is the original prompt the listener rejected; `reason` is the veto text + * ({@link PromptDecision} `block.reason`). NOT a {@link SurfaceEventType}: a + * blocked prompt produces no LLM message and never reaches `deriveMessages()`. + */ + 'prompt/blocked': { content: ContentBlock[]; source: MessageSource; reason: string } /** * In-session context injection (file-change notices, subdir AGENTS.md, * skill content, cron notifications, …). Rendered into the derived history diff --git a/docs/rfc/implemented/feature/2026-06-30-interception-seams.md b/docs/rfc/implemented/feature/2026-06-30-interception-seams.md index 7f2d23ab3e..138fe975a1 100644 --- a/docs/rfc/implemented/feature/2026-06-30-interception-seams.md +++ b/docs/rfc/implemented/feature/2026-06-30-interception-seams.md @@ -16,7 +16,7 @@ Add/​reshape the interception seams so every one returns a small, seam-specifi **New `agent/*` events** (`dsh-agent`): - `agent/session-start(agent, source)` — emit, once before turn 1, carrying a `SessionStartSource` (`startup` for a fresh/forked create, `resume` for a reloaded persisted session; `clear`/`compact` reserved). A pure notification — it CANNOT block startup (a deliberate gap: a bridge logs/injects, it does not gate startup). A listener seeds context via `agent.inject()`. -- `agent/prompt-submit(agent, content, source, next) → PromptDecision` — waterfall, fired per drained queued message inside the open turn, before the `user/message` append. `allow` (optionally rewriting the prompt `content` or attaching `additionalContext`) or `block`. +- `agent/prompt-submit(agent, content, source, next) → PromptDecision` — waterfall, fired per drained queued message inside the open turn, before the `user/message` append. `allow` (optionally rewriting the prompt `content` or attaching `additionalContext`) or `block` (dropping the prompt; the loop appends a durable `prompt/blocked` in its place — see the dispatch note below). **Reshaped** `agent/turn-continuation` from `(…, defaultDecision: boolean) → boolean` to `(…, defaultDecision: ContinuationDecision) → ContinuationDecision`. A `{action:'continue', reason?}` may carry model-facing context recorded as next-step steering in the same turn — the typed twin of the existing `/goal` step-end-steer pattern. @@ -26,7 +26,7 @@ Add/​reshape the interception seams so every one returns a small, seam-specifi ### Three load-bearing loop decisions -1. **Always open the turn first; a fully-blocked batch is a zero-step `rejected` turn.** `prompt-submit` fires AFTER `turn/start`, per message. A batch whose every prompt is blocked does NOT skip the turn — it opens a zero-step turn that closes with `rejected`. This one move resolves three problems at once: (1) turn-enclosure holds (every event has an open turn to live in); (2) the durable `turn/end` is appended and the ACP bridge settles normally off it (mapping `rejected`→`cancelled`) instead of hanging; (3) the block reason is a durable in-turn fact. An `allow`'s `additionalContext` is `inject()`ed into this now-open turn. +1. **Always open the turn first; a fully-blocked batch is a zero-step `rejected` turn; every veto is recorded as `prompt/blocked`.** `prompt-submit` fires AFTER `turn/start`, per message. A batch whose every prompt is blocked does NOT skip the turn — it opens a zero-step turn that closes with `rejected`. This one move resolves three problems at once: (1) turn-enclosure holds (every event has an open turn to live in); (2) the durable `turn/end` is appended and the ACP bridge settles normally off it (mapping `rejected`→`cancelled`) instead of hanging; (3) the block reason is a durable in-turn fact. Independently, each individual veto appends a `prompt/blocked` session event (the original `content`, `source`, and `reason`) in place of the `user/message` the prompt would have become — necessary because a MIXED batch (one prompt blocked, another allowed) does NOT end `rejected`, so the boundary reason alone would silently lose the blocked prompt on replay. An `allow`'s `additionalContext` is `inject()`ed into this now-open turn. 2. **Post-tool `additionalContext` is buffered and appended AFTER all `tool/result`s.** `content`/`feedback` shape the result `execute()` returns, but `additionalContext` is a SEPARATE `context/message`, and a single step can carry multiple tool calls. Appending context right after each result would interleave `result(c1) → context → result(c2)` and break tool-call/result adjacency. So `execute()` surfaces `additionalContext` on its `ToolExecutionResult`, and the loop buffers every per-call context for the step and appends them as `context/message`(s) only after every `tool/result` is appended. diff --git a/packages/core/agent-loop/README.md b/packages/core/agent-loop/README.md index 7bb41be102..1cf6028f98 100644 --- a/packages/core/agent-loop/README.md +++ b/packages/core/agent-loop/README.md @@ -51,7 +51,7 @@ forever: TURN (error-contained): 'turn/start' each queued: waterfall agent/prompt-submit → allow (→ session('user/message'), - inject additionalContext) | block (drop) + inject additionalContext) | block (→ session('prompt/blocked'), drop) if every prompt blocked: 'turn/end'(rejected), no step ⟵ zero-step turn STEP loop: drain steering diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index 2923a3dd22..d08b5ccdba 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -385,6 +385,14 @@ async function runTurn(ctx: Context, agent: ReactLoopAgent, handle: LoopHandle, ) if (decision.kind === 'block') { lastBlockReason = decision.reason + // Record the veto durably: `PromptDecision.reason` is the durable record + // of why a prompt was blocked, but a fully-blocked batch's `rejected` + // turn/end only preserves the LAST reason, and a MIXED batch (this prompt + // blocked, another allowed) does not end `rejected` at all — so without + // this append a blocked prompt would vanish from the log whenever any + // sibling prompt is allowed. `prompt/blocked` sits in the open turn in + // place of the `user/message` this prompt would have become. + session.append('prompt/blocked', { content: message.content, source: message.source, reason: decision.reason }) continue } anyAllowed = true diff --git a/packages/core/agent-loop/tests/interception.spec.ts b/packages/core/agent-loop/tests/interception.spec.ts index b2a5c932d6..e76ac30fa9 100644 --- a/packages/core/agent-loop/tests/interception.spec.ts +++ b/packages/core/agent-loop/tests/interception.spec.ts @@ -176,12 +176,57 @@ describe('agent/prompt-submit', () => { expect(log.some(e => e.type === 'turn/end')).toBe(true) expect(log.some(e => e.type === 'user/message')).toBe(false) expect(log.some(e => e.type === 'step/start')).toBe(false) + // the veto is recorded durably as a prompt/blocked in the open turn + const blocked = log.find(e => e.type === 'prompt/blocked') + expect(blocked?.type === 'prompt/blocked' && blocked.data).toMatchObject({ + content: [{ type: 'text', text: 'do something' }], + reason: 'blocked by policy', + }) // ended rejected with the block reason expect(reasons).toEqual([{ kind: 'rejected', reason: 'blocked by policy' }]) const turnEnd = log.findLast(e => e.type === 'turn/end') expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason).toEqual({ kind: 'rejected', reason: 'blocked by policy' }) }) + it('a mixed batch records a prompt/blocked for the vetoed prompt while the allowed one runs', async () => { + // Two prompts queued into ONE turn: block "secret", allow "safe". The turn is + // NOT rejected (a prompt was allowed), so without a durable prompt/blocked the + // vetoed prompt and its reason would vanish from the log entirely. + const adapter = new MockAdapter([textResponse('ran once')]) + const ctx = await harness(adapter) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + + ctx.on('agent/prompt-submit', async (_agent, content, _source, next): Promise => { + const text = content.map(b => (b.type === 'text' ? b.text : '')).join('') + return text === 'secret' ? { kind: 'block', reason: 'policy: no secrets' } : next() + }) + + const reasons: TurnEndReason[] = [] + ctx.on('session/event', (_s, event: SessionEvent) => { if (event.type === 'turn/end') reasons.push(event.data.reason) }) + + // both sends land before the loop drains → one batched turn + send(agent, 'secret') + send(agent, 'safe') + await waitForIdle(ctx, agent) + + const log = events(agent) + // the allowed prompt became a user/message and drove exactly one model call + const userMsgs = log.filter(e => e.type === 'user/message') + expect(userMsgs).toHaveLength(1) + expect(userMsgs[0]?.type === 'user/message' && userMsgs[0].data.content).toEqual([{ type: 'text', text: 'safe' }]) + expect(adapter.requests.length).toBeGreaterThanOrEqual(1) + // the blocked prompt is durably recorded, with its content + reason + const blocked = log.filter(e => e.type === 'prompt/blocked') + expect(blocked).toHaveLength(1) + expect(blocked[0]?.type === 'prompt/blocked' && blocked[0].data).toMatchObject({ + content: [{ type: 'text', text: 'secret' }], + reason: 'policy: no secrets', + }) + // the turn did NOT reject — a sibling was allowed — so the boundary reason + // alone would not have preserved the block + expect(reasons.some(r => r.kind === 'rejected')).toBe(false) + }) + it('a throwing prompt-submit listener ends the turn balanced (error), loop survives', async () => { const adapter = new MockAdapter([textResponse('after')]) const ctx = await harness(adapter) diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts index b92bc08d39..a8e2113b25 100644 --- a/packages/core/agent/src/types.ts +++ b/packages/core/agent/src/types.ts @@ -96,10 +96,14 @@ export interface HookContext { * - `allow` proceeds with the prompt; optional `content` REPLACES the prompt * bytes (a rewrite), and optional `additionalContext` is `inject()`ed as a * separate `context/message` the next request also sees. - * - `block` drops the prompt entirely; `reason` is the durable record of why. - * A batch whose every prompt is blocked still opens a zero-step turn that ends - * with {@link TurnEndReason} `rejected` (so the boundary stays balanced and a - * UI can render "blocked by hook"). + * - `block` drops the prompt (it never becomes a `user/message`); `reason` is + * the durable record of why. The loop appends a `prompt/blocked` session event + * (carrying the original content, source, and `reason`) in place of the + * dropped `user/message`, so the veto survives replay even in a MIXED batch + * where a sibling prompt is allowed. A batch whose EVERY prompt is blocked + * additionally opens a zero-step turn that ends with {@link TurnEndReason} + * `rejected` (so the boundary stays balanced and a UI can render "blocked by + * hook"). */ export type PromptDecision = | { kind: 'allow'; content?: ContentBlock[]; additionalContext?: HookContext } diff --git a/packages/core/session/README.md b/packages/core/session/README.md index 45512c9d9e..96d267c79b 100644 --- a/packages/core/session/README.md +++ b/packages/core/session/README.md @@ -49,7 +49,7 @@ Plain class (not a Cordis Service). Create via `ctx.sessions.create()`. ### Session event vocabulary (`types.ts`) -The append-only log: `turn/start`, `turn/end`, `step/start`, `step/end`, `user/message`, `assistant/message`, `assistant/chunk`, `tool/call`, `tool/result`, `steering/message`, `context/message`, `todo/write`. Token usage rides on `assistant/message.usage`; an operational error's step is on `turn/end.reason` for `kind: 'error'`. +The append-only log: `turn/start`, `turn/end`, `step/start`, `step/end`, `user/message`, `prompt/blocked`, `assistant/message`, `assistant/chunk`, `tool/call`, `tool/result`, `steering/message`, `context/message`, `todo/write`. Token usage rides on `assistant/message.usage`; an operational error's step is on `turn/end.reason` for `kind: 'error'`. Merge-extensible via `SessionEventMap` — the compaction seam adds `compact/start`, `compact/summary`, and `compact/end`. diff --git a/packages/core/session/src/types.ts b/packages/core/session/src/types.ts index c26750c606..13965d823d 100644 --- a/packages/core/session/src/types.ts +++ b/packages/core/session/src/types.ts @@ -204,6 +204,17 @@ export interface SessionEventMap { 'step/end': { turn: number; step: number } /** A user-visible prompt (queued message drained at turn start). */ 'user/message': { content: ContentBlock[]; source: MessageSource } + /** + * A queued prompt an `agent/prompt-submit` listener VETOED — the durable + * record of a blocked prompt and why. Appended in place of the `user/message` + * the prompt would have become, so the block survives replay even in a MIXED + * batch where another queued prompt is allowed (there the turn does not end + * `rejected`, so the boundary reason alone would not preserve it). `content` + * is the original prompt the listener rejected; `reason` is the veto text + * ({@link PromptDecision} `block.reason`). NOT a {@link SurfaceEventType}: a + * blocked prompt produces no LLM message and never reaches `deriveMessages()`. + */ + 'prompt/blocked': { content: ContentBlock[]; source: MessageSource; reason: string } /** * In-session context injection (file-change notices, subdir AGENTS.md, * skill content, cron notifications, …). Rendered into the derived history From 9428acdc9609ffca5a2f56760974cc0313cc22be Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 17:13:42 +0800 Subject: [PATCH 37/47] fix(hook-protocol): discard a discriminator-less hookSpecificOutput block MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address review on the hook-protocol PR: the event-scope guard only rejected a `hookSpecificOutput` block whose `hookEventName` NAMED a different event than the firing one. A block with NO `hookEventName` slipped through and applied its event-scoped permission fields to whatever event was firing. Under the keyed Claude Code schema (where `hookEventName` is part of the block) a missing discriminator is as malformed as a mismatched one — a Stop/UserPromptSubmit hook emitting a bare `{ permissionDecision: 'deny' }` could deny the current point. Drop the `eventName !== undefined` clause so the guard fires on both a mismatch and an omission when the caller passes `expectedEventName`; the opt-out (no expectedEventName) still applies a discriminator-less block as-is. Flipped the test that pinned the old behavior (it documented an artifact, not a contract) and proved the corrected one red on the old guard. --- packages/hooks/hook-protocol/README.md | 2 +- packages/hooks/hook-protocol/src/codec.ts | 17 ++++++++++------- .../hooks/hook-protocol/tests/codec.spec.ts | 18 +++++++++++++++--- 3 files changed, 26 insertions(+), 11 deletions(-) diff --git a/packages/hooks/hook-protocol/README.md b/packages/hooks/hook-protocol/README.md index abf822ea29..8478f8aa74 100644 --- a/packages/hooks/hook-protocol/README.md +++ b/packages/hooks/hook-protocol/README.md @@ -18,7 +18,7 @@ Why a shared lib at all: Codex deliberately reimplements a *subset* of the Claud - **`matchesMatcher(matcher, query, mode)`** — match-all on absent/`''`/`'*'`; `claude` mode treats a pure `[A-Za-z0-9_|]+` pattern as a literal (pipe = exact-match alternation) and anything else as a regex; `codex` mode is always an unanchored regex. An invalid regex matches nothing (never throws). - **`runHook(bash, hook, options, now)`** — serialize `options.payload` to the hook's stdin (with a trailing newline iff `options.trailingNewline`), merge `options.env` after the executor's credential scrub (the `dsh-bash` trusted-plugin surface), honor the hook's `timeoutSec` (else `defaultTimeoutMs`), and decode the result (threading `options.expectedEventName` to the codec). Never throws: an executor rejection (infra fault) becomes a `HookOutput` with `exitCode: undefined` (a non-blocking error). `now` is injected for testable durations. -- **`parseHookOutput(exitCode, stdout, stderr, expectedEventName?)`** — the exit-code + structured-stdout codec. Exit `0` → parse JSON stdout (lenient: non-JSON is left for the bridge); exit `2` → blocking error, `stderr` is the block reason (surfaced as `decision: 'block'`); other → non-blocking error. `hookSpecificOutput.permissionDecision` (allow/deny/ask) overrides a legacy top-level `decision`; `additionalContext`/`updatedInput`/`systemMessage`/`continue`/`stopReason`/`suppressOutput` are parsed too. The schemas key the `hookSpecificOutput` block by `hookEventName`, so passing `expectedEventName` (the firing event) DISCARDS a block whose `hookEventName` names a different event — its event-scoped fields don't take effect (a `PreToolUse` block on a `Stop` hook is malformed), while the event-agnostic top-level fields still apply. Pure and total. +- **`parseHookOutput(exitCode, stdout, stderr, expectedEventName?)`** — the exit-code + structured-stdout codec. Exit `0` → parse JSON stdout (lenient: non-JSON is left for the bridge); exit `2` → blocking error, `stderr` is the block reason (surfaced as `decision: 'block'`); other → non-blocking error. `hookSpecificOutput.permissionDecision` (allow/deny/ask) overrides a legacy top-level `decision`; `additionalContext`/`updatedInput`/`systemMessage`/`continue`/`stopReason`/`suppressOutput` are parsed too. The schemas key the `hookSpecificOutput` block by `hookEventName`, so passing `expectedEventName` (the firing event) DISCARDS a block whose `hookEventName` names a different event — or omits it entirely — its event-scoped fields don't take effect (a `PreToolUse` block on a `Stop` hook is malformed, and so is a discriminator-less block that would otherwise apply to any event), while the event-agnostic top-level fields still apply. Pure and total. - **`mergeHookOutputs(outputs)`** — fold the results of every hook that matched one point: permission precedence **deny > ask > allow**, halt sticky on the first `continue:false`, block reasons joined with `\n\n`, `additionalContext`/`systemMessages` accumulated in order. ## `hook/*` session events diff --git a/packages/hooks/hook-protocol/src/codec.ts b/packages/hooks/hook-protocol/src/codec.ts index 1b246a3a14..b5170028c2 100644 --- a/packages/hooks/hook-protocol/src/codec.ts +++ b/packages/hooks/hook-protocol/src/codec.ts @@ -117,8 +117,8 @@ export function parseHookOutput(exitCode: number | undefined, stdout: string, st /** * Fold a parsed structured-stdout object into `output` (mutates in place). * `expectedEventName` (the firing event) gates the per-event `hookSpecificOutput` - * block: a block whose `hookEventName` names a different event has its - * event-scoped fields discarded (only its `hookEventName` is recorded). + * block: a block whose `hookEventName` names a different event — OR omits it — has + * its event-scoped fields discarded (any present `hookEventName` is still recorded). */ function applyStructured(output: HookOutput, parsed: Record, expectedEventName?: string): void { const cont = bool(parsed, 'continue') @@ -146,11 +146,14 @@ function applyStructured(output: HookOutput, parsed: Record, ex // Always surface the discriminator (for the log/diagnostics), even on a // mismatch — the record should show what the malformed block claimed. if (eventName !== undefined) output.hookEventName = eventName - // The schemas key this block by event: if it names a DIFFERENT event than the - // one firing, it is malformed — discard its event-scoped fields (a PreToolUse - // block must not deny a Stop hook). A caller that passes no expectedEventName - // opts out of the check (applies the block as-is). - if (expectedEventName !== undefined && eventName !== undefined && eventName !== expectedEventName) { + // The schemas key this block by event: when a caller passes the firing event + // (`expectedEventName`), the block's `hookEventName` MUST name it. A different + // name — or a MISSING one — is malformed under the keyed schema, so discard the + // event-scoped fields (a PreToolUse block must not deny a Stop hook; nor may a + // discriminator-less block silently apply PreToolUse-scoped permission fields to + // whatever event is firing). A caller that passes no expectedEventName opts out + // of the check (applies the block as-is). + if (expectedEventName !== undefined && eventName !== expectedEventName) { return } const permission = permissionDecisionOf(str(hso, 'permissionDecision')) diff --git a/packages/hooks/hook-protocol/tests/codec.spec.ts b/packages/hooks/hook-protocol/tests/codec.spec.ts index 4f37f804bb..5f72753c57 100644 --- a/packages/hooks/hook-protocol/tests/codec.spec.ts +++ b/packages/hooks/hook-protocol/tests/codec.spec.ts @@ -121,11 +121,23 @@ describe('parseHookOutput — structured stdout (exit 0 only)', () => { expect(out.decision).toBe('deny') }) - it('applies a block that has NO hookEventName regardless of expectedEventName', () => { - // No discriminator to mismatch — the block applies (a hook that omits the key). + it('DISCARDS a block with NO hookEventName when a firing event is expected', () => { + // Under the keyed schema a missing discriminator is as malformed as a + // mismatched one: a discriminator-less block must not apply its event-scoped + // permission fields to whatever event happens to be firing. + const out = parseHookOutput(0, JSON.stringify({ + hookSpecificOutput: { permissionDecision: 'deny', additionalContext: 'x' }, + }), '', 'Stop') + expect(out.hookEventName).toBeUndefined() // none to record + expect(out.decision).toBeUndefined() // event-scoped fields discarded + expect(out.additionalContext).toBeUndefined() + }) + + it('applies a discriminator-less block when expectedEventName is omitted (opt-out)', () => { + // With no firing event to validate against, the block applies as-is. const out = parseHookOutput(0, JSON.stringify({ hookSpecificOutput: { permissionDecision: 'deny' }, - }), '', 'Stop') + }), '') expect(out.decision).toBe('deny') }) From 9bc4df28c117e740a6420c1a2c504c21fc2a5504 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 18:35:53 +0800 Subject: [PATCH 38/47] fix(hooks): delegate context-only hooks + default CLAUDE_PROJECT_DIR MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address review on the hook-bridges PR — two composability/compatibility bugs in both the CC and Codex bridges: 1. A hook that only attaches additionalContext (no block/deny) returned `allow`/`accept` WITHOUT calling next(), short-circuiting every later agent/prompt-submit / tools/post-execute listener. A policy/sandbox plugin registered after the bridge never saw the prompt. Now the context-only path delegates via next() and folds its context onto the downstream decision (concatContext): a downstream block/deny still wins and carries the bridge context; a downstream allow/accept keeps its own content rewrite and gains the context. Only a real hook deny/block short-circuits. 2. CLAUDE_PROJECT_DIR was empty in the default ACP wiring (no projectDir configured), breaking common unmodified hooks that reference $CLAUDE_PROJECT_DIR. It now defaults per-run to the agent's session workspace (the same cwd the hook runs in); an explicit config.projectDir still wins. Regression tests per bridge: a later listener blocks a prompt a context-only hook allowed; both contexts survive when the downstream also adds one; the default CLAUDE_PROJECT_DIR reaches the hook. Each proven red on the pre-fix code. --- .../feature/2026-06-30-hook-bridges.md | 12 +- packages/hooks/hooks-claude/README.md | 6 +- packages/hooks/hooks-claude/src/index.ts | 61 ++++++++-- .../hooks/hooks-claude/tests/coverage.spec.ts | 107 ++++++++++++++++++ packages/hooks/hooks-codex/README.md | 4 +- packages/hooks/hooks-codex/src/index.ts | 37 +++++- .../hooks/hooks-codex/tests/coverage.spec.ts | 64 +++++++++++ 7 files changed, 271 insertions(+), 20 deletions(-) diff --git a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md index d6aea68b17..a8cc3df4db 100644 --- a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md +++ b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md @@ -24,9 +24,9 @@ Each bridge maps the neutral `MergedHookOutcome` from the shared lib onto the se | Seam | CC | Codex | |---|---|---| | `agent/session-start` (emit) | additionalContext → `agent.inject()` | plain-stdout output → additionalContext → `agent.inject()` | -| `agent/prompt-submit` | `deny`→`block`; context→`allow` | `block`→`block`; context→`allow` | +| `agent/prompt-submit` | `deny`→`block`; context-only→delegate+fold | `block`→`block`; context-only→delegate+fold | | `tools/pre-execute` | `deny`→`deny`; `ask`→`ask` | `block`→`deny` (no allow/ask) | -| `tools/post-execute` | `deny`→`block`+feedback; context→`accept` | same | +| `tools/post-execute` | `deny`→`block`+feedback; context-only→delegate+fold | same | | `agent/turn-continuation` | blocking Stop → `continue` (reason = next-step steering) | same | | `subagent/start` (emit) | additionalContext → inject into the live child | — (not a Codex event) | | `subagent/end` (emit) | observe-only | — | @@ -35,6 +35,14 @@ Each bridge maps the neutral `MergedHookOutcome` from the shared lib onto the se `agent.inject()` defaults a missing `MessageSource` to `{ kind: 'user' }` — which would record plugin-injected context as if the user had typed it. So every bridge `inject()` and every `HookContext` passes an explicit `{ kind: 'plugin', plugin: 'hooks-claude' | 'hooks-codex' }` source. A test asserts the resulting `context/message.source` is the plugin, never `user`. +### Adding context is not a veto — delegate, then fold + +A hook that only attaches `additionalContext` (no block/deny) is NOT a decision the bridge should return on its own: returning `allow`/`accept` from a waterfall listener WITHOUT calling `next()` short-circuits every later `agent/prompt-submit` / `tools/post-execute` listener, so a policy/sandbox plugin registered after the bridge would never see the prompt. So on the context-only path each bridge **delegates via `next()`** and then **folds** its `additionalContext` onto the downstream decision (`concatContext`): a downstream `block`/`deny` still wins (and carries the bridge context too), a downstream `allow`/`accept` keeps its own content rewrite and gains the bridge context. Only a real `deny`/`block` from the hook short-circuits. Tests assert a later listener can still block a prompt a context-only hook allowed, and that both contexts survive when the downstream also adds one. + +### CLAUDE_PROJECT_DIR defaults to the session workspace + +Claude Code always exports `CLAUDE_PROJECT_DIR`, and common unmodified hooks reference `$CLAUDE_PROJECT_DIR` for project-relative paths. An explicit `config.projectDir` wins; when it is omitted (the default ACP wiring configures only `configPath`), the bridge defaults the env var per-run to the agent's session workspace — the same `session.header.cwd` the hook already runs in — rather than leaving it empty. So a stock project-relative hook works in the default setup. + ### Containment The config is parsed ONCE at load; a read/parse failure logs and registers nothing rather than crashing boot (a typo'd path must not take the agent down). Only `type: 'command'` hooks run — a `prompt`/`agent`/HTTP hook (CC) or an `async: true` / non-command hook (Codex) is parsed-and-skipped with a warning. The emit-listener paths (`session-start`, `subagent/start`) run detached, with their `inject` contained in a `.catch` that logs (a throwing inject must not break session boot or the loop). diff --git a/packages/hooks/hooks-claude/README.md b/packages/hooks/hooks-claude/README.md index f9520f69be..ce1c6b090a 100644 --- a/packages/hooks/hooks-claude/README.md +++ b/packages/hooks/hooks-claude/README.md @@ -11,7 +11,7 @@ import type { Config } from '@deepseek-ai/dsh-hooks-claude' const config: Config = { configPath: '/path/to/hooks.json', // required: a hooks.json or a settings file with a `hooks` key pluginRoot: '/path/to/plugin', // optional: replaces ${CLAUDE_PLUGIN_ROOT} in command strings - projectDir: '/path/to/project', // optional: replaces ${CLAUDE_PROJECT_DIR} AND set as the hook env var + projectDir: '/path/to/project', // optional: replaces ${CLAUDE_PROJECT_DIR} AND sets the hook env var; defaults to the session cwd when omitted defaultTimeoutMs: 600_000, // optional: per-hook timeout when a hook sets none (CC default) } ``` @@ -34,9 +34,9 @@ The hooks **themselves** run in the agent's session workspace: for the agent-sco | CC hook | Harness seam | Mapping | |---|---|---| | `SessionStart` | `agent/session-start` (emit) | additionalContext → `agent.inject()` into the new session (cannot block) | -| `UserPromptSubmit` | `agent/prompt-submit` (waterfall) | `deny` → `PromptDecision.block`; additionalContext → `allow` with context | +| `UserPromptSubmit` | `agent/prompt-submit` (waterfall) | `deny` → `PromptDecision.block`; additionalContext-only → delegate via `next()` then fold context onto the downstream decision (a later listener can still block/rewrite) | | `PreToolUse` | `tools/pre-execute` (waterfall) | `deny` → `PreToolDecision.deny`; `ask` → `PreToolDecision.ask` | -| `PostToolUse` | `tools/post-execute` (waterfall) | `deny` → `block` with feedback; additionalContext → `accept` with context | +| `PostToolUse` | `tools/post-execute` (waterfall) | `deny` → `block` with feedback; additionalContext-only → delegate via `next()` then fold context onto the downstream decision | | `Stop` | `agent/turn-continuation` (waterfall) | a blocking Stop hook forces `continue`, feeding its reason as next-step steering | | `SubagentStart` | `subagent/start` (emit) | additionalContext → `agent.inject()` into the live child | | `SubagentStop` | `subagent/end` (emit) | observe-only | diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts index 6816201e60..3468e1c037 100644 --- a/packages/hooks/hooks-claude/src/index.ts +++ b/packages/hooks/hooks-claude/src/index.ts @@ -59,9 +59,17 @@ export interface Config { * `hooks.json` from each `session/new.cwd` is not yet implemented. */ configPath: string - /** Replaces `${CLAUDE_PLUGIN_ROOT}` in command strings (the plugin's root dir). */ + /** + * Replaces `${CLAUDE_PLUGIN_ROOT}` in command strings (the plugin's root dir). + */ pluginRoot?: string - /** Replaces `${CLAUDE_PROJECT_DIR}` in command strings + set as the hook env var. */ + /** + * Replaces `${CLAUDE_PROJECT_DIR}` in command strings AND is exported as the + * `CLAUDE_PROJECT_DIR` env var for hook processes. When omitted, the env var + * defaults per-run to the agent's session workspace (`session.header.cwd`, the + * same dir the hook runs in) — Claude Code always exports this var, and common + * unmodified hooks reference `$CLAUDE_PROJECT_DIR` for project-relative paths. + */ projectDir?: string /** Default per-hook timeout in ms when a hook sets none (CC default: 600000). */ defaultTimeoutMs?: number @@ -111,7 +119,6 @@ export function apply(ctx: Context, config: Config): void { } const defaultTimeoutMs = config.defaultTimeoutMs ?? 600_000 - const hookEnv = config.projectDir !== undefined ? { CLAUDE_PROJECT_DIR: config.projectDir } : undefined /** * Run every command hook configured for `point` whose matcher selects @@ -136,6 +143,15 @@ export function apply(ctx: Context, config: Config): void { // operate in the user's project tree. Absent for a no-agent run (falls back // to the executor default). const workdir = opts.agent?.session.header.cwd + // CLAUDE_PROJECT_DIR: an explicit config value wins; otherwise default it to + // the session workspace (the same dir the hook RUNS in). Claude Code always + // exports this var, and common unmodified hooks reference `$CLAUDE_PROJECT_DIR` + // (shell expansion at run time) for project-relative paths — leaving it empty + // in the default ACP wiring (no `projectDir` configured) would break them even + // though the bridge already knows the workspace. Absent only for a no-agent run + // with no configured projectDir (nothing to point at). + const projectDir = config.projectDir ?? workdir + const hookEnv = projectDir !== undefined ? { CLAUDE_PROJECT_DIR: projectDir } : undefined for (const group of groups) { if (!matchesMatcher(group.matcher, matchQuery, 'claude')) continue for (const hook of group.hooks) { @@ -195,6 +211,16 @@ export function apply(ctx: Context, config: Config): void { return { content, source: PLUGIN_SOURCE } } + /** + * Concatenate this bridge's {@link HookContext} (`ours`, always present at the + * call sites) with a downstream listener's optional one, so folding our + * additionalContext onto a delegated decision drops neither. + */ + function concatContext(ours: HookContext, theirs: HookContext | undefined): HookContext { + if (!theirs) return ours + return { content: [...ours.content, ...theirs.content], source: ours.source } + } + // --- SessionStart: emit (cannot block). Inject any additionalContext into the // agent. The matcher subject is the source. // TODO(session-start-gating): `agent/session-start` is a SYNCHRONOUS emit and @@ -223,9 +249,18 @@ export function apply(ctx: Context, config: Config): void { if (merged.decision === 'deny') { return { kind: 'block', reason: merged.reason ?? 'blocked by UserPromptSubmit hook' } } - const context = contextFrom(merged) - if (context) return { kind: 'allow', additionalContext: context } - return next() + // Our hooks did not block. DELEGATE (attaching context alone is not a veto): + // a later `agent/prompt-submit` listener must still get to block or rewrite. + // Then fold our additionalContext onto its decision — a downstream block wins + // (a dropped prompt makes the context moot; `block` carries no context field). + const downstream = await next() + const ours = contextFrom(merged) + if (!ours || downstream.kind !== 'allow') return downstream + return { + kind: 'allow', + ...downstream.content !== undefined ? { content: downstream.content } : {}, + additionalContext: concatContext(ours, downstream.additionalContext), + } }) // --- PreToolUse → PreToolDecision. Matcher subject is the tool name. --- @@ -245,8 +280,18 @@ export function apply(ctx: Context, config: Config): void { if (merged.decision === 'deny') { return { kind: 'block', feedback: [{ type: 'text', text: merged.reason ?? 'blocked by PostToolUse hook' }], ...context ? { additionalContext: context } : {} } } - if (context) return { kind: 'accept', additionalContext: context } - return next() + // Our hooks did not block. DELEGATE so a later listener can still block/replace, + // then fold our context onto its decision (a downstream block carries it too). + const downstream = await next() + if (!context) return downstream + if (downstream.kind === 'block') { + return { ...downstream, additionalContext: concatContext(context, downstream.additionalContext) } + } + return { + kind: 'accept', + ...downstream.content !== undefined ? { content: downstream.content } : {}, + additionalContext: concatContext(context, downstream.additionalContext), + } }) // --- Stop → ContinuationDecision. CC's Stop hook can force the conversation to diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts index c1c6d1581d..d2e01f4c4d 100644 --- a/packages/hooks/hooks-claude/tests/coverage.spec.ts +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -410,6 +410,113 @@ describe('hooks-claude coverage — continue:false, context arm, no-cwd', () => expect(ran).toBe(true) // the mismatched deny was discarded → the tool ran }) + it('defaults CLAUDE_PROJECT_DIR to the session workspace when no projectDir is configured', async () => { + // The default ACP wiring sets no projectDir. A stock CC hook that references + // $CLAUDE_PROJECT_DIR (shell expansion) must still get the session workspace, + // not an empty string. The hook echoes the var as additionalContext. + const d = dir() + const workspace = dir() + const s = sh(d, 'ctx.sh', '#!/usr/bin/env bash\nprintf \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"dir=%s"}}\' "$CLAUDE_PROJECT_DIR"\n') + const path = hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('ran')]) + const ctx = await harness(path, adapter) // NB: no projectDir + // The factory create() path honors meta.cwd (the plain agentLoop.create() does not). + const { SessionId } = await import('@deepseek-ai/dsh-session') + const handle = ctx.agents.create({ agentId: AgentId('a1'), sessionId: SessionId('s1'), meta: { cwd: workspace }, agentOptions: { model: 'mock' } }) + handle.agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, handle.agent as ReactLoopAgent) + expect(events(handle.agent as ReactLoopAgent).some(e => e.type === 'context/message' + && e.data.content.some(b => b.type === 'text' && b.text.includes(`dir=${workspace}`)))).toBe(true) + await handle.dispose() + }) + + it('a context-only UserPromptSubmit hook DELEGATES so a later listener can still block', async () => { + // A hook that only adds context must NOT short-circuit the waterfall: a + // downstream agent/prompt-submit listener (a policy plugin) must still get to + // block the prompt. Before the fix the bridge returned `allow` without next(). + const d = dir() + const s = sh(d, 'ctx.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"bridge ctx"}}\'\n') + const path = hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('should not run')]) + const ctx = await harness(path, adapter) + // A later listener that blocks every prompt (registered AFTER the bridge). + const { AgentId: AId } = await import('@deepseek-ai/dsh-agent') + ctx.on('agent/prompt-submit', async () => ({ kind: 'block' as const, reason: 'policy veto' })) + const agent = ctx.agentLoop.create(AId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + // the downstream block won: the model was never called, no user/message was + // recorded, and the (sole, fully-blocked) prompt closed the turn `rejected` + expect(adapter.requests).toHaveLength(0) + expect(events(agent).some(e => e.type === 'user/message')).toBe(false) + const turnEnd = events(agent).findLast(e => e.type === 'turn/end') + expect(turnEnd?.type === 'turn/end' && turnEnd.data.reason).toMatchObject({ kind: 'rejected', reason: 'policy veto' }) + }) + + it('folds the bridge additionalContext WITH a downstream listener that also adds context', async () => { + // Both the bridge hook and a later prompt-submit listener attach context; the + // request must see BOTH (concatContext keeps the downstream one too). + const d = dir() + const s = sh(d, 'ctx.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"from-bridge"}}\'\n') + const path = hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(path, adapter) + ctx.on('agent/prompt-submit', async () => ({ + kind: 'allow' as const, + content: [{ type: 'text' as const, text: 'rewritten-prompt' }], + additionalContext: { content: [{ type: 'text' as const, text: 'from-downstream' }], source: { kind: 'plugin' as const, plugin: 'policy' } }, + })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const req = JSON.stringify(adapter.requests[0]!.messages) + expect(req).toContain('from-bridge') + expect(req).toContain('from-downstream') + expect(req).toContain('rewritten-prompt') // downstream content rewrite preserved + // the original prompt was replaced by the downstream rewrite + const userMsg = events(agent).find(e => e.type === 'user/message') + expect(userMsg?.type === 'user/message' && userMsg.data.content.some(b => b.type === 'text' && b.text === 'rewritten-prompt')).toBe(true) + }) + + it('folds the bridge PostToolUse context onto a downstream ACCEPT that replaces content', async () => { + // The bridge hook adds context; a later post-execute listener accepts with a + // content rewrite. Both the rewrite and the bridge context survive. + const d = dir() + const s = sh(d, 'ctx.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"bridge-note"}}\'\n') + const path = hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + ctx.on('tools/post-execute', async () => ({ kind: 'accept' as const, content: [{ type: 'text' as const, text: 'rewritten-result' }] })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text === 'rewritten-result')).toBe(true) + expect(events(agent).some(e => e.type === 'context/message' && e.data.content.some(b => b.type === 'text' && b.text.includes('bridge-note')))).toBe(true) + }) + + it('folds the bridge PostToolUse context onto a downstream listener BLOCK', async () => { + // The bridge hook only adds context; a later post-execute listener blocks the + // result. The block wins AND carries the bridge context (concatContext on the + // block arm). + const d = dir() + const s = sh(d, 'ctx.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"bridge-note"}}\'\n') + const path = hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: s }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(path, adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + ctx.on('tools/post-execute', async () => ({ kind: 'block' as const, feedback: [{ type: 'text' as const, text: 'downstream-block' }] })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]) + await waitForIdle(ctx, agent) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('downstream-block'))).toBe(true) + // the bridge's context still landed (folded onto the block) + expect(events(agent).some(e => e.type === 'context/message' && e.data.content.some(b => b.type === 'text' && b.text.includes('bridge-note')))).toBe(true) + }) + }) describe('hooks-claude coverage — executor reject + no-open-turn', () => { diff --git a/packages/hooks/hooks-codex/README.md b/packages/hooks/hooks-codex/README.md index 6b28d7d114..72be33f57f 100644 --- a/packages/hooks/hooks-codex/README.md +++ b/packages/hooks/hooks-codex/README.md @@ -40,9 +40,9 @@ The hooks themselves run in the agent's session workspace: for the agent-scoped | Codex hook | Harness seam | Mapping | |---|---|---| | `SessionStart` | `agent/session-start` (emit) | a plain-stdout hook's output → additionalContext → `agent.inject()` | -| `UserPromptSubmit` | `agent/prompt-submit` (waterfall) | `block` (exit 2) → `PromptDecision.block`; additionalContext → `allow` with context | +| `UserPromptSubmit` | `agent/prompt-submit` (waterfall) | `block` (exit 2) → `PromptDecision.block`; additionalContext-only → delegate via `next()` then fold context onto the downstream decision | | `PreToolUse` | `tools/pre-execute` (waterfall) | `block` → `PreToolDecision.deny` (no `allow`/`ask`) | -| `PostToolUse` | `tools/post-execute` (waterfall) | `block` → `block` with feedback; additionalContext → `accept` with context | +| `PostToolUse` | `tools/post-execute` (waterfall) | `block` → `block` with feedback; additionalContext-only → delegate via `next()` then fold context onto the downstream decision | | `Stop` | `agent/turn-continuation` (waterfall) | a blocking Stop hook forces `continue` with the reason as next-step steering | A tool call's payload carries the real `tool_name` (the same value the matcher tests) and Codex's `tool_input: { command }` shape (the `command` arg when present, else `''`). The matcher subject is the tool name (`PreToolUse`/`PostToolUse`) or the session source (`SessionStart`); `UserPromptSubmit`/`Stop` ignore matchers. diff --git a/packages/hooks/hooks-codex/src/index.ts b/packages/hooks/hooks-codex/src/index.ts index c71a0811ea..393e157cba 100644 --- a/packages/hooks/hooks-codex/src/index.ts +++ b/packages/hooks/hooks-codex/src/index.ts @@ -166,6 +166,16 @@ export function apply(ctx: Context, config: Config): void { return { content, source: PLUGIN_SOURCE } } + /** + * Concatenate this bridge's {@link HookContext} (`ours`, always present at the + * call sites) with a downstream listener's optional one, so folding our + * additionalContext onto a delegated decision drops neither. + */ + function concatContext(ours: HookContext, theirs: HookContext | undefined): HookContext { + if (!theirs) return ours + return { content: [...ours.content, ...theirs.content], source: ours.source } + } + // SessionStart: emit. Codex passes a plain-stdout hook's output as additionalContext. // TODO(session-start-gating): a synchronous emit + detached `.then`, so the // injected context is BEST-EFFORT — not guaranteed before the first turn reaches @@ -185,9 +195,16 @@ export function apply(ctx: Context, config: Config): void { const turn = lastTurn(agent) const merged = await runPoint('UserPromptSubmit', '', { ...turnBase(agent, 'UserPromptSubmit', model), prompt: blocksToText(content) }, { agent, turn, plainStdoutAsContext: true }) if (merged.decision === 'deny') return { kind: 'block', reason: merged.reason ?? 'blocked by UserPromptSubmit hook' } - const context = contextFrom(merged) - if (context) return { kind: 'allow', additionalContext: context } - return next() + // Context alone is not a veto: DELEGATE so a later prompt-submit listener can + // still block/rewrite, then fold our context onto its decision. + const downstream = await next() + const ours = contextFrom(merged) + if (!ours || downstream.kind !== 'allow') return downstream + return { + kind: 'allow', + ...downstream.content !== undefined ? { content: downstream.content } : {}, + additionalContext: concatContext(ours, downstream.additionalContext), + } }) // PreToolUse → PreToolDecision. Codex blocks only (no allow/ask honored). @@ -206,8 +223,18 @@ export function apply(ctx: Context, config: Config): void { if (merged.decision === 'deny') { return { kind: 'block', feedback: [{ type: 'text', text: merged.reason ?? 'blocked by PostToolUse hook' }], ...context ? { additionalContext: context } : {} } } - if (context) return { kind: 'accept', additionalContext: context } - return next() + // Context alone is not a veto: DELEGATE, then fold our context onto the + // downstream decision (a downstream block carries it too). + const downstream = await next() + if (!context) return downstream + if (downstream.kind === 'block') { + return { ...downstream, additionalContext: concatContext(context, downstream.additionalContext) } + } + return { + kind: 'accept', + ...downstream.content !== undefined ? { content: downstream.content } : {}, + additionalContext: concatContext(context, downstream.additionalContext), + } }) // Stop → ContinuationDecision. A blocking Stop hook forces continuation. diff --git a/packages/hooks/hooks-codex/tests/coverage.spec.ts b/packages/hooks/hooks-codex/tests/coverage.spec.ts index d7a5806fbd..3bfc3edb03 100644 --- a/packages/hooks/hooks-codex/tests/coverage.spec.ts +++ b/packages/hooks/hooks-codex/tests/coverage.spec.ts @@ -69,6 +69,70 @@ describe('hooks-codex coverage — decision mapping paths', () => { expect(JSON.stringify(adapter.requests[0]!.messages)).toContain('ctx-x') }) + it('a context-only UserPromptSubmit hook DELEGATES so a later listener can still block', async () => { + // Context alone is not a veto: a downstream agent/prompt-submit listener (a + // policy plugin registered after the bridge) must still get to block. Before + // the fix the bridge returned `allow` without calling next(). + const d = dir() + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'c.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"bridge ctx"}}\'\n') }] }] }) + const adapter = new MockAdapter([textResponse('should not run')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.on('agent/prompt-submit', async () => ({ kind: 'block' as const, reason: 'policy veto' })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + expect(adapter.requests).toHaveLength(0) + expect(events(agent).some(e => e.type === 'user/message')).toBe(false) + const te = events(agent).findLast(e => e.type === 'turn/end') + expect(te?.type === 'turn/end' && te.data.reason).toMatchObject({ kind: 'rejected', reason: 'policy veto' }) + }) + + it('folds the bridge additionalContext WITH a downstream listener that also adds context', async () => { + const d = dir() + hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'c.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"from-bridge"}}\'\n') }] }] }) + const adapter = new MockAdapter([textResponse('ok')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.on('agent/prompt-submit', async () => ({ + kind: 'allow' as const, + content: [{ type: 'text' as const, text: 'rewritten-prompt' }], + additionalContext: { content: [{ type: 'text' as const, text: 'from-downstream' }], source: { kind: 'plugin' as const, plugin: 'policy' } }, + })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const req = JSON.stringify(adapter.requests[0]!.messages) + expect(req).toContain('from-bridge') + expect(req).toContain('from-downstream') + expect(req).toContain('rewritten-prompt') + }) + + it('folds the bridge PostToolUse context onto a downstream ACCEPT that replaces content', async () => { + const d = dir() + hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'pc.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"bridge-note"}}\'\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + ctx.on('tools/post-execute', async () => ({ kind: 'accept' as const, content: [{ type: 'text' as const, text: 'rewritten-result' }] })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text === 'rewritten-result')).toBe(true) + expect(events(agent).some(e => e.type === 'context/message' && e.data.content.some(b => b.type === 'text' && b.text.includes('bridge-note')))).toBe(true) + }) + + it('folds the bridge PostToolUse context onto a downstream listener BLOCK', async () => { + const d = dir() + hooks(d, { PostToolUse: [{ hooks: [{ type: 'command', command: sh(d, 'pc.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"PostToolUse","additionalContext":"bridge-note"}}\'\n') }] }] }) + const adapter = new MockAdapter([toolCallResponse('c1', 'echo', {}), textResponse('done')]) + const ctx = await harness(join(d, 'hooks.json'), adapter) + ctx.tools.register(defineTool({ name: 'echo', description: 'e', parameters: {}, async execute() { return [{ type: 'text', text: 'ok' }] } })) + ctx.on('tools/post-execute', async () => ({ kind: 'block' as const, feedback: [{ type: 'text' as const, text: 'downstream-block' }] })) + const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) + agent.send([{ type: 'text', text: 'go' }]); await waitForIdle(ctx, agent) + const result = events(agent).find(e => e.type === 'tool/result') + expect(result?.type === 'tool/result' && result.data.isError).toBe(true) + expect(result?.type === 'tool/result' && result.data.content.some(b => b.type === 'text' && b.text.includes('downstream-block'))).toBe(true) + expect(events(agent).some(e => e.type === 'context/message' && e.data.content.some(b => b.type === 'text' && b.text.includes('bridge-note')))).toBe(true) + }) + it('SessionStart additionalContext is injected for the first request', async () => { const d = dir() hooks(d, { SessionStart: [{ hooks: [{ type: 'command', command: sh(d, 's.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"SessionStart","additionalContext":"start-ctx"}}\'\n') }] }] }) From 2a66b7c4e0ce53bedf6939f4393f324c06025ac9 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 20:07:10 +0800 Subject: [PATCH 39/47] docs(hooks): correct fold description + drop history-narrating test comments MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex convergence findings on the delegate-and-fold fix (code path verified correct, prose only): - The hook-bridges RFC claimed a downstream `block` "carries the bridge context too" for BOTH seams. True for `tools/post-execute` (PostToolDecision.block has an additionalContext field) but false for `agent/prompt-submit` (PromptDecision.block is `{kind,reason}` with no context field). The code is already correct — a blocked prompt drops the context, which is right since the prompt never reaches the model. Reworded the RFC to state the per-seam difference accurately. - Two test comments narrated "Before the fix…", which the current-state-only doc rule forbids. Reworded to describe the behavior, not its history. - Documented on concatContext (both bridges) why the merged block carries a single source: a HookContext holds one MessageSource and the seam cannot represent mixed provenance; rendering distinguishes only by source.kind, so a downstream plugin's text stays framed as plugin context. --- docs/rfc/implemented/feature/2026-06-30-hook-bridges.md | 2 +- packages/hooks/hooks-claude/src/index.ts | 7 ++++++- packages/hooks/hooks-claude/tests/coverage.spec.ts | 2 +- packages/hooks/hooks-codex/src/index.ts | 6 +++++- packages/hooks/hooks-codex/tests/coverage.spec.ts | 4 ++-- 5 files changed, 15 insertions(+), 6 deletions(-) diff --git a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md index a8cc3df4db..3bedd73b34 100644 --- a/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md +++ b/docs/rfc/implemented/feature/2026-06-30-hook-bridges.md @@ -37,7 +37,7 @@ Each bridge maps the neutral `MergedHookOutcome` from the shared lib onto the se ### Adding context is not a veto — delegate, then fold -A hook that only attaches `additionalContext` (no block/deny) is NOT a decision the bridge should return on its own: returning `allow`/`accept` from a waterfall listener WITHOUT calling `next()` short-circuits every later `agent/prompt-submit` / `tools/post-execute` listener, so a policy/sandbox plugin registered after the bridge would never see the prompt. So on the context-only path each bridge **delegates via `next()`** and then **folds** its `additionalContext` onto the downstream decision (`concatContext`): a downstream `block`/`deny` still wins (and carries the bridge context too), a downstream `allow`/`accept` keeps its own content rewrite and gains the bridge context. Only a real `deny`/`block` from the hook short-circuits. Tests assert a later listener can still block a prompt a context-only hook allowed, and that both contexts survive when the downstream also adds one. +A hook that only attaches `additionalContext` (no block/deny) is NOT a decision the bridge should return on its own: returning `allow`/`accept` from a waterfall listener WITHOUT calling `next()` short-circuits every later `agent/prompt-submit` / `tools/post-execute` listener, so a policy/sandbox plugin registered after the bridge would never see the prompt. So on the context-only path each bridge **delegates via `next()`** and then **folds** its `additionalContext` onto the downstream decision (`concatContext`). The fold differs by seam because the two Decision unions differ: `tools/post-execute` — a downstream `block`/`accept` both carry an `additionalContext` field, so the bridge context rides along either way (a downstream block wins AND keeps the context; a downstream accept keeps its content rewrite and gains the context). `agent/prompt-submit` — a downstream `allow` gains the bridge context (and keeps its own content rewrite / additionalContext), but `PromptDecision.block` carries no context field, so a downstream block drops the bridge context — which is correct: a blocked prompt never reaches the model, so context attached to it is moot. Only a real `deny`/`block` from the hook itself short-circuits. Tests assert a later listener can still block a prompt a context-only hook allowed, and that both contexts survive when the downstream also adds one. ### CLAUDE_PROJECT_DIR defaults to the session workspace diff --git a/packages/hooks/hooks-claude/src/index.ts b/packages/hooks/hooks-claude/src/index.ts index 3468e1c037..6151a11c44 100644 --- a/packages/hooks/hooks-claude/src/index.ts +++ b/packages/hooks/hooks-claude/src/index.ts @@ -214,7 +214,12 @@ export function apply(ctx: Context, config: Config): void { /** * Concatenate this bridge's {@link HookContext} (`ours`, always present at the * call sites) with a downstream listener's optional one, so folding our - * additionalContext onto a delegated decision drops neither. + * additionalContext onto a delegated decision drops neither. The merged block + * carries a single `source` — this bridge's — because a `HookContext` holds one + * `MessageSource` and the seam cannot represent mixed provenance; the rendered + * `context/message` only distinguishes by `source.kind` ('plugin'), so a + * downstream plugin's text is still correctly framed as plugin context, not a + * user prompt. */ function concatContext(ours: HookContext, theirs: HookContext | undefined): HookContext { if (!theirs) return ours diff --git a/packages/hooks/hooks-claude/tests/coverage.spec.ts b/packages/hooks/hooks-claude/tests/coverage.spec.ts index d2e01f4c4d..63e2f611ce 100644 --- a/packages/hooks/hooks-claude/tests/coverage.spec.ts +++ b/packages/hooks/hooks-claude/tests/coverage.spec.ts @@ -433,7 +433,7 @@ describe('hooks-claude coverage — continue:false, context arm, no-cwd', () => it('a context-only UserPromptSubmit hook DELEGATES so a later listener can still block', async () => { // A hook that only adds context must NOT short-circuit the waterfall: a // downstream agent/prompt-submit listener (a policy plugin) must still get to - // block the prompt. Before the fix the bridge returned `allow` without next(). + // block the prompt. The bridge delegates via next() and folds its context. const d = dir() const s = sh(d, 'ctx.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"bridge ctx"}}\'\n') const path = hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: s }] }] }) diff --git a/packages/hooks/hooks-codex/src/index.ts b/packages/hooks/hooks-codex/src/index.ts index 393e157cba..a704a6af24 100644 --- a/packages/hooks/hooks-codex/src/index.ts +++ b/packages/hooks/hooks-codex/src/index.ts @@ -169,7 +169,11 @@ export function apply(ctx: Context, config: Config): void { /** * Concatenate this bridge's {@link HookContext} (`ours`, always present at the * call sites) with a downstream listener's optional one, so folding our - * additionalContext onto a delegated decision drops neither. + * additionalContext onto a delegated decision drops neither. The merged block + * carries a single `source` — this bridge's — because a `HookContext` holds one + * `MessageSource` and the seam cannot represent mixed provenance; the rendered + * `context/message` only distinguishes by `source.kind` ('plugin'), so a + * downstream plugin's text is still correctly framed as plugin context. */ function concatContext(ours: HookContext, theirs: HookContext | undefined): HookContext { if (!theirs) return ours diff --git a/packages/hooks/hooks-codex/tests/coverage.spec.ts b/packages/hooks/hooks-codex/tests/coverage.spec.ts index 3bfc3edb03..87032c98ce 100644 --- a/packages/hooks/hooks-codex/tests/coverage.spec.ts +++ b/packages/hooks/hooks-codex/tests/coverage.spec.ts @@ -71,8 +71,8 @@ describe('hooks-codex coverage — decision mapping paths', () => { it('a context-only UserPromptSubmit hook DELEGATES so a later listener can still block', async () => { // Context alone is not a veto: a downstream agent/prompt-submit listener (a - // policy plugin registered after the bridge) must still get to block. Before - // the fix the bridge returned `allow` without calling next(). + // policy plugin registered after the bridge) must still get to block. The + // bridge delegates via next() and folds its context onto the decision. const d = dir() hooks(d, { UserPromptSubmit: [{ hooks: [{ type: 'command', command: sh(d, 'c.sh', '#!/usr/bin/env bash\necho \'{"hookSpecificOutput":{"hookEventName":"UserPromptSubmit","additionalContext":"bridge ctx"}}\'\n') }] }] }) const adapter = new MockAdapter([textResponse('should not run')]) From b84d4828a8eeaf66f9ba308fd8d1445e268a5eee Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Thu, 2 Jul 2026 23:42:16 +0800 Subject: [PATCH 40/47] refactor(events): remove the agent/stream-chunk mirror of assistant/chunk MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The loop recorded every model token delta as a durable `assistant/chunk` session event AND emitted an identical live `agent/stream-chunk` Cordis event one line later. Same StreamChunk, same turn/step; the emit added only the live Agent handle, which the sole consumer discarded. This is the boundary-mirror duplication the event-domain work removed for turn/step boundaries, applied to the token stream — a follow-up the boundary RFC explicitly deferred. The premise is settled: chunk persistence is authoritative (the proposal to stop persisting chunks was rejected — replay/snapshots depend on it), so `assistant/chunk` on `session/event` is the load-bearing token stream and `agent/stream-chunk` is pure redundancy. - Remove the `agent/stream-chunk` declaration + emit; drop the now-unused StreamChunk import from dsh-agent's types. - Migrate `dsh-ui-stdio` (the only live consumer; ACP already reads assistant/chunk off session/event) to render assistant/chunk in its existing session/event listener. Consolidating to one listener also makes the inReasoning dim-SGR flag deterministic across chunk/boundary events (they no longer race across two listeners). - Repoint the agent-loop tests (cancel/loop) and ui-stdio tests to the session/event assistant/chunk feed. - New RFC (implemented/simplification/2026-07-02-remove-stream-chunk-mirror); amend the boundary RFC's retained-list entry to cross-link; update architecture, cookbook, event-domain-semantics, the ACP proposal, and the regenerated cordis catalog. Snapshot goldens unchanged (ACP never used the mirror), confirming no editor-facing transcript change. --- docs/architecture.md | 4 +- docs/cookbook/extension-cookbook.md | 8 ++-- docs/cordis-catalog/events-and-services.md | 16 +------ docs/rfc/README.md | 1 + .../2026-06-30-event-domain-semantics.md | 2 +- ...-20-remove-agent-boundary-mirror-events.md | 12 +++--- .../2026-07-02-remove-stream-chunk-mirror.md | 41 ++++++++++++++++++ .../2026-06-14-acp-agent-client-protocol.md | 8 ++-- packages/core/agent-loop/src/loop.ts | 3 +- packages/core/agent-loop/tests/cancel.spec.ts | 8 ++-- packages/core/agent-loop/tests/loop.spec.ts | 12 ++---- packages/core/agent/src/types.ts | 9 +--- packages/support/ui-stdio/README.md | 5 +-- packages/support/ui-stdio/src/index.ts | 43 ++++++++++--------- .../support/ui-stdio/tests/ui-stdio.spec.ts | 33 +++++++------- 15 files changed, 116 insertions(+), 89 deletions(-) create mode 100644 docs/rfc/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md diff --git a/docs/architecture.md b/docs/architecture.md index 1a9878f0e2..5d7878c8ed 100644 --- a/docs/architecture.md +++ b/docs/architecture.md @@ -147,7 +147,7 @@ forever: req = {model, system, tools, messages: session.deriveMessages(), signal} req = waterfall agent/request ⟵ hooks, model switch stream ctx.llm.stream(req) ⟵ waterfall llm/stream (raw chunks) - session('assistant/chunk'); emit agent/stream-chunk + session('assistant/chunk') if assembler.finish is error/aborted: throw ⟵ adapter's in-band error path → step error (turn ends error/aborted, not a normal completed message) @@ -221,7 +221,7 @@ Every MVP feature (including the TODO-marked ones), with the mechanism that impl | Skills | section + tool registration; `inject()` skill content on invocation | | Memory | section provider + tool | | Scheduled tasks (cron) | plugin registers model-callable scheduling tools; timer fires → `send(…, {source: {kind: 'cron', …}})` when idle / `inject()` notification when busy | -| UI (GUI; CLI emits JSONL) | listen `agent/stream-chunk` + `session/event`; input → `send()` | +| UI (GUI; CLI emits JSONL) | listen `session/event` (assistant chunks, boundaries, tool activity); input → `send()` | | Telemetry / replayable trace | `session/event` → JSONL; replay = `sessions.create(id, { seed })` | | DeepSeek V4 (and other) models | `LlmAdapter` subclass via `registerAdapter`. **Implemented twice**: `dsh-llm-deepseek` (hand-rolled) and `dsh-llm-pi-ai` (pi-ai-backed) | | Plugin hot-reload | every registration is a `ctx.effect` → vendored HMR just works | diff --git a/docs/cookbook/extension-cookbook.md b/docs/cookbook/extension-cookbook.md index e882f506f5..8103374aa1 100644 --- a/docs/cookbook/extension-cookbook.md +++ b/docs/cookbook/extension-cookbook.md @@ -30,7 +30,7 @@ export function apply(ctx: Context) { ## A UI plugin -A UI plugin consumes `agent/stream-chunk` and session events for rendering, and drives input back in via `agent.send()` / `agent.steer()`. +A UI plugin renders from the `session/event` feed (the assistant token stream as `assistant/chunk`, plus turn/step boundaries and tool activity), and drives input back in via `agent.send()` / `agent.steer()`. ```ts import type { Context } from 'cordis' @@ -43,8 +43,10 @@ export const name = 'my-ui' export const inject = ['agents'] export function apply(ctx: Context) { - ctx.on('agent/stream-chunk', (agent, turn, step, chunk) => { - if (chunk.type === 'text-delta') render(chunk.text) + ctx.on('session/event', (_session, event) => { + if (event.type === 'assistant/chunk' && event.data.chunk.type === 'text-delta') { + render(event.data.chunk.text) + } }) onUserInput(text => ctx.agents.get(AgentId('main'))?.send([{ type: 'text', text }])) } diff --git a/docs/cordis-catalog/events-and-services.md b/docs/cordis-catalog/events-and-services.md index db77315800..ac52002563 100644 --- a/docs/cordis-catalog/events-and-services.md +++ b/docs/cordis-catalog/events-and-services.md @@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w Types: [Agent](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:358`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:353`](../../packages/core/agent/src/types.ts) #### `agent/pre-step` — serial @@ -135,7 +135,7 @@ Steering content was injected into a running turn. Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md) -Source: [`packages/core/agent/src/types.ts:352`](../../packages/core/agent/src/types.ts) +Source: [`packages/core/agent/src/types.ts:347`](../../packages/core/agent/src/types.ts) #### `agent/step-result` — waterfall @@ -149,18 +149,6 @@ Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-struct Source: [`packages/core/agent/src/types.ts:330`](../../packages/core/agent/src/types.ts) -#### `agent/stream-chunk` — emit - -A raw StreamChunk arrived from the model (token-level UI/log feed). - -```ts cordis-catalog -'agent/stream-chunk'(agent: Agent, turn: number, step: number, chunk: StreamChunk): void -``` - -Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md) - -Source: [`packages/core/agent/src/types.ts:347`](../../packages/core/agent/src/types.ts) - #### `agent/turn-continuation` — waterfall Waterfall: override the turn-continuation decision via a typed ContinuationDecision. The loop's `defaultDecision` is `continue` when the step had tool calls or steering was injected, else `stop`. Listeners force-continue (`/goal`, `/loop` — optionally attaching a `reason` recorded as next-step steering) or force-stop (budget guards). Call `next()` to delegate to the default, or return a decision to override. diff --git a/docs/rfc/README.md b/docs/rfc/README.md index c6afcce4ac..bb143ced89 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -102,6 +102,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Keep one public stop primitive](implemented/simplification/2026-06-20-public-agent-stop-surface.md) | 2026-06-20 | | [Fold trace-only session facts into load-bearing events](implemented/simplification/2026-06-20-collapse-trace-only-session-events.md) | 2026-06-20 | | [Stop mirroring durable boundaries as agent events](implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md) | 2026-06-20 | +| [Stop mirroring the token stream as an agent event](implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md) | 2026-07-02 | ### Architecture diff --git a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md index 7ae254f8dc..8f5be09b2b 100644 --- a/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md +++ b/docs/rfc/implemented/architecture/2026-06-30-event-domain-semantics.md @@ -19,7 +19,7 @@ This is the foundational change in a stack that adds a Hooks subsystem; it estab **Three domains, one job each, with a single boundary rule.** - **`session/*` — the durable, replayable FACT log.** Owns `SessionEventMap`; every entry is JSON-only (no live objects). One `session/event` emit per append, plus the `session/flush` parallel durability checkpoint. It is also the live transcript feed: a consumer that wants to render or react to what happened subscribes here, so live rendering and `session/load` replay share one path. -- **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/stream-chunk`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`) that notify with the `Agent` in hand. Turn and step BOUNDARIES are NOT here — they are durable session events read off `session/event`. +- **`agent/*` — the LIVE runtime surface.** Always carries the live `Agent`. Two shapes: INTERCEPTION waterfalls (`agent/request`, `agent/step-result`, `agent/turn-continuation`) that mutate or veto, and TRANSIENT emits (`agent/status`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/steering`) that notify with the `Agent` in hand. Turn and step BOUNDARIES are NOT here — they are durable session events read off `session/event`, and so is the token stream (`assistant/chunk`). - **`tools/*` — the tool registry + execution seam.** **The boundary rule:** a durable, replayable fact is a `SessionEvent`; a live interception or a transient/live-object signal is an `agent`/`tools` Cordis event. A turn or step boundary is a durable fact, so it lives in the session log and is read off the `session/event` feed — it is NOT mirrored as an `agent/*` emit. diff --git a/docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md b/docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md index d4cf8bbfe9..d8ff017d63 100644 --- a/docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md +++ b/docs/rfc/implemented/simplification/2026-06-20-remove-agent-boundary-mirror-events.md @@ -3,10 +3,12 @@ Status: implemented (accepted 2026-07-01) + removed; `agent/steering` and `agent/stream-chunk` were RETAINED here (they + are not durable-boundary mirrors — see "Scope: what is and isn't removed"). + The original proposal bundled `agent/steering` into the removal; validating + against the code showed it is a distinct live-only signal, so it stayed. + `agent/stream-chunk` was later removed by its own decision — see + [Stop mirroring the token stream as an agent event](2026-07-02-remove-stream-chunk-mirror.md). --> ## Problem @@ -29,7 +31,7 @@ Removed (durable-boundary mirrors — the session log is authoritative for each) RETAINED — NOT durable-boundary mirrors, so out of scope for this decision: - `agent/steering` — a live control signal, not a boundary. (The original proposal bundled it into the removal; validating against the code, it is not a duplicate of a durable boundary, so removing it here would have been scope creep. Its fate is a separate future decision.) -- `agent/stream-chunk` — the live token stream. `assistant/chunk` persistence remains load-bearing, so the chunk stream could later be evaluated as a mirror, but that is a separate decision. +- `agent/stream-chunk` — the live token stream. Out of scope for THIS decision (a mirror of the durable `assistant/chunk`, not a boundary), it was removed by its own follow-up: [Stop mirroring the token stream as an agent event](2026-07-02-remove-stream-chunk-mirror.md). - `agent/created`, `agent/disposed`, `agent/status`, `agent/error`, `agent/queued` — lifecycle/control events that are not transcript data. `agent/queued` in particular is an inbox acknowledgement that fires before any durable event exists (cancelled queued work may never enter the log), so it is deliberately live-only. ## What we give up diff --git a/docs/rfc/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md b/docs/rfc/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md new file mode 100644 index 0000000000..b2ed1bc5d4 --- /dev/null +++ b/docs/rfc/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.md @@ -0,0 +1,41 @@ +# RFC: Stop mirroring the token stream as an agent event + +Status: implemented (accepted 2026-07-02) + +## Problem + +The loop records every model token delta as a durable `assistant/chunk` session event AND emitted a parallel live `agent/stream-chunk` Cordis event carrying the identical data. In `packages/core/agent-loop/src/loop.ts` the two sat one line apart: + +```ts ignore-check +const chunkEvent = session.append('assistant/chunk', { turn, step, chunk }) +chunkSeqs.push(chunkEvent.seq) +ctx.emit('agent/stream-chunk', agent, turn, step, chunk) // ← the mirror +``` + +- Durable: `assistant/chunk: { turn, step, chunk }`. +- Live emit: `agent/stream-chunk(agent, turn, step, chunk)` — same `StreamChunk`, same `turn`/`step`. + +The only thing the emit added over the session event was the live `Agent` handle, and the sole consumer discarded it (its handler signature was `(_agent, _turn, _step, chunk)`). + +This is the same duplication the [boundary-mirror removal](2026-06-20-remove-agent-boundary-mirror-events.md) eliminated for turn/step boundaries: a consumer had two sources of truth for one durable fact, and every change had to touch both. That RFC deferred the chunk stream ("`assistant/chunk` persistence remains load-bearing, so the chunk stream could later be evaluated as a mirror, but that is a separate decision") rather than bundling it in. This RFC is that separate decision. + +The premise the deferral hinged on is settled: chunk persistence is authoritative and staying. The proposal to stop persisting chunks and keep only a transient live stream event was [rejected](../../rejected/simplification/2026-06-20-assembled-assistant-messages-only.md) — high-fidelity replay, partial failed streams, and snapshot replay all depend on the persisted `assistant/chunk` feed. So `assistant/chunk` on `session/event` is the durable, load-bearing token stream, and `agent/stream-chunk` is a pure redundant mirror of it. + +## Decision + +Remove `agent/stream-chunk` from the agent event taxonomy. The token stream is read off `session/event` as `assistant/chunk`, the same feed persistence and replay already use — `session/event` is the single live transcript stream (assistant chunks, turn/step boundaries, tool activity, todos). + +**Consumers.** The only production consumer that mattered — the ACP bridge (`dsh-acp`), the real editor-facing streaming surface — already renders `assistant/chunk` off `session/event`, never `agent/stream-chunk`, so it is unaffected. The stdio UI (`dsh-ui-stdio`, a disposable test REPL) was the sole live consumer; it already had a `session/event` listener (from the boundary migration), so its chunk rendering folded into that listener as an `assistant/chunk` case. Consolidating to one listener also removed a latent hazard: the `inReasoning` dim-SGR flag was previously shared across two separate listeners (`agent/stream-chunk` and `session/event`), so a chunk and a boundary racing on it had no defined order; a single listener over the append order makes the interleaving deterministic. + +## Scope + +Removed: `agent/stream-chunk`. + +Not touched: +- `assistant/chunk` (the durable session event) — the authoritative token stream, kept exactly as-is. This RFC removes the LIVE MIRROR, not the persistence (the persistence-removal proposal was separately rejected — see above). +- `agent/steering` — a live control signal with no durable twin, retained (its fate remains a separate future decision, per the boundary RFC). +- `agent/status`, `agent/error`, `agent/created`/`agent/disposed`, `agent/queued`, `agent/session-start` — lifecycle/control events that are not transcript data and have no durable duplicate. + +## What we give up + +A plugin can no longer observe token deltas from an `Agent`-first event. It subscribes to `session/event` and filters `assistant/chunk` (the `Agent` handle, if needed, is recovered from a session-id→agent map built from `agent/created`/`agent/disposed`, exactly as boundary consumers already do). No production consumer needed the live `Agent` at chunk time; this is the same acceptable trade the boundary-mirror removal made. diff --git a/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md b/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md index 1e31a3fdb8..36396e233d 100644 --- a/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md +++ b/docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md @@ -7,7 +7,7 @@ Status: proposed ## Problem -The coding agent is reachable only through the readline `stdio-chat` plugin: it reads lines from stdin, calls `agent.send()`, and prints `agent/stream-chunk` to stdout. There is no structured protocol, so the agent cannot be embedded in an editor — no streaming render, no tool-call display, no permission UI, no resumable sessions. +The coding agent is reachable only through the readline `stdio-chat` plugin: it reads lines from stdin, calls `agent.send()`, and prints the assistant token stream (`session/event` `assistant/chunk`) to stdout. There is no structured protocol, so the agent cannot be embedded in an editor — no streaming render, no tool-call display, no permission UI, no resumable sessions. Editors are converging on the Agent Client Protocol (ACP), which Zed and others speak: JSON-RPC 2.0 over newline-delimited stdio, modeled on the Language Server Protocol. An editor boots the agent as a subprocess and exchanges `initialize` / `session/new` / `session/prompt`, rendering streamed `session/update` notifications and `session/request_permission` prompts. The goal is for the agent to be a drop-in ACP server — implement the protocol once and run in any ACP client, with no per-editor glue. @@ -28,8 +28,8 @@ The mapping between ACP and existing harness seams — each row names the seam a | `session/load {sessionId, cwd, mcpServers, additionalDirectories}` | the `dsh-agent` resume factory ([session persistence](../../implemented/architecture/2026-06-14-session-persistence.md) + Dependency note) | load `{ meta, events }`, seed the session, re-derive history via `deriveMessages()`, replay prior turns to the client as `session/update` per the ACP load contract; `mcpServers` and `additionalDirectories` rejected as in `session/new` | | `session/prompt {prompt}` | `agent.send()` (idle) | text blocks → `TextBlock`; reject image/audio per advertised capabilities; one in-flight prompt per session | | resolve `session/prompt` → `{stopReason}` | the `turn/end` `session/event` (its `reason`) | map the harness kebab `TurnEndReason` to the ACP snake_case `StopReason` wire enum: `completed`→`end_turn`, `max-tokens`→`max_tokens`, `aborted`(cancel)→`cancelled`, plus `refusal`/`max_turn_requests` when applicable; honor the batch-into-one-turn and send-not-synchronously-running settle semantics | -| `session/update: agent_message_chunk` | `agent/stream-chunk` `text-delta` only | do NOT also emit on `block-end(TextBlock)` — it carries the fully-assembled block and would duplicate the streamed text | -| `session/update: agent_thought_chunk` | `agent/stream-chunk` `reasoning-delta` | | +| `session/update: agent_message_chunk` | `session/event` `assistant/chunk` `text-delta` only | do NOT also emit on `block-end(TextBlock)` — it carries the fully-assembled block and would duplicate the streamed text | +| `session/update: agent_thought_chunk` | `session/event` `assistant/chunk` `reasoning-delta` | | | `session/update: tool_call` (pending→in_progress) | `session/event` `tool/call` | demux via a Session→sessionId map; `kind` inferred from the tool name | | `session/update: tool_call_update` (completed/failed) | `session/event` `tool/result` | a throwing `tools/execute` yields NO `tool/result` → fail the pending tool UI from `agent/error`/turn-end | | `session/request_permission {sessionId, toolCall, options}` | prepended `tools/execute` listener | no-op unless `exec.agent` is ACP-owned; await the outcome; `selected/allow_*` → `next()`; `reject_*`/`cancelled` → veto `ToolExecutionResult{isError}` | @@ -46,7 +46,7 @@ Lifecycle and disposal: the connection, listeners, and in-flight permission prom 1. Package scaffold `packages/ui/acp/` per [the cookbook](../../../cookbook/adding-a-package.md); add `@agentclientprotocol/sdk` and `zod`. Add the abstract create/resume factory to `dsh-agent` (the interface) so the bridge can `inject: ['agents', 'sessions', 'tools', 'sessionPersistence']` without depending on the concrete loop; `sessionPersistence` is required because `session/load` advertises `loadSession: true`. (Fallback only if the factory is judged not worth it: inject `agentLoop` directly and record the architecture-rule exception in `docs/architecture.md`.) 2. Connection plus `initialize`/`session/new`: wire `AgentSideConnection` to stdin/stdout; protocolVersion negotiation; the single-session guard; create the live session through the new `{ sessionId, meta }` factory seam (so the ACP `sessionId` and validated `cwd` become the session's id and header); the `sessionId↔agent` and `Session↔sessionId` maps. 3. Internal edit — turn-end reason fidelity (sanctioned: edit internals to fit ACP). Extend `TurnEndReasonMap` in the proper places: (a) declaration-merge a `max-tokens` variant in the owning package (`packages/core/session/src/types.ts`, alongside `completed|aborted|error|disposed`) — add `max-tokens` because `FinishReasonMap` produces it (DeepSeek maps `length` → `max-tokens`); do not add `refusal`, since no current adapter produces it (unknown DeepSeek finish reasons collapse to `error`), but leave a comment in `TurnEndReasonMap` noting `refusal` should be added when an adapter first emits it (`FinishReasonMap` is merge-extensible); (b) make `agent-loop`'s `loop.ts` populate the reason from the model `finish` chunk — `assembler.finish` lives inside `runStep`, so `runStep` must return it up to `runTurn`, and the rule is "the last step's finish reason wins, but any `max-tokens` in the turn surfaces as `max-tokens`"; (c) no consumer exhaustively switches over `TurnEndReason` today (the invariants plugin switches on `SessionEventType`, and `deriveMessages` ignores `turn/end`), so adding `max-tokens` is a non-breaking extension — but recheck before landing; (d) update [docs/architecture.md](../../../architecture.md) (the CI-verified loop-lifecycle/event-taxonomy doc) and the affected package READMEs/JSDoc (`dsh-session`, `dsh-agent`, `dsh-agent-loop`) per the repo doc-sync policy. This replaces a fragile "observe the finish chunk in the bridge" hack with a real, documented contract. -4. Prompt-turn streaming plus load: translate `agent/stream-chunk` and `session/event` into `session/update`; resolve `session/prompt` on settle, mapping the harness `TurnEndReason` to the ACP `StopReason` wire enum (`completed`→`end_turn`, `max-tokens`→`max_tokens`, `aborted`→`cancelled`) — a small total function with a test asserting the exact wire strings, since the SDK rejects an unknown `stopReason`. Concrete correlation, since the loop batches queued messages into one turn and `send()` does not synchronously flip to running: install the `session/event` listener before `send()`; capture the prompt's owning turn from its `turn/start` record, then resolve on that turn's `turn/end` (with `agent/status` idle/disposed as a fallback); reject an empty/whitespace prompt up front rather than calling `send()` (no turn would ever start, so the RPC would hang). Implement `session/load` on the session-persistence resume seam. +4. Prompt-turn streaming plus load: translate `session/event` (the `assistant/chunk` token stream plus boundaries and tool activity) into `session/update`; resolve `session/prompt` on settle, mapping the harness `TurnEndReason` to the ACP `StopReason` wire enum (`completed`→`end_turn`, `max-tokens`→`max_tokens`, `aborted`→`cancelled`) — a small total function with a test asserting the exact wire strings, since the SDK rejects an unknown `stopReason`. Concrete correlation, since the loop batches queued messages into one turn and `send()` does not synchronously flip to running: install the `session/event` listener before `send()`; capture the prompt's owning turn from its `turn/start` record, then resolve on that turn's `turn/end` (with `agent/status` idle/disposed as a fallback); reject an empty/whitespace prompt up front rather than calling `send()` (no turn would ever start, so the RPC would hang). Implement `session/load` on the session-persistence resume seam. 5. Permission gate: a single `tools/execute` listener registered with `prepend: true`, owning a `WeakMap` of bridge-created agents; no-op (`next()`) for unowned/no-agent calls; for owned calls → `session/request_permission` → allow (`next()`) / veto; settle the stored resolver exactly once on outcome, cancel, or connection close. 6. Example wiring (extract a shared base). `@cordisjs/plugin-include` is itself a plugin entry that resets `ctx.baseUrl` and loads a path, so a child `cordis.yml` can nest-include a shared base; the extraction is safe because every dependent plugin declares `inject` (loader groups initialize via `Promise.all`, so YAML order is NOT the dependency mechanism — never rely on it). Extract the provider/tool core (`llm, sessions, system-prompt, tools, agents, invariants, llm-deepseek, bash-local, tool-bash`) into `examples/base.yml`; have both `coding-agent` and a new `examples/acp-agent/` include it and add their own UI plugin plus logger. Keep `agent-loop` per-example (NOT in the base): `AgentLoop` creates its configured agents in its constructor, and the two examples disagree — `coding-agent` needs a pre-created `main` (its `stdio-chat` calls `ctx.agents.get('main')`), while `acp-agent` must pre-create none (ACP `session/new` creates agents). So `coding-agent` declares `agent-loop` with `agents: [{ id: main, … }]` and `acp-agent` with `agents: []`. `acp-agent` loads `dsh-session-persistence-jsonl` (from [session persistence](../../implemented/architecture/2026-06-14-session-persistence.md) — required for `session/load`), omits the stdout logger (see Risks), and adds `pnpm run demo:acp` plus the Zed `agent_servers` snippet. 7. Tests (the repo cares a lot here): a property-based test for the protocol shape (precedent: [property-based testing](../../implemented/testing/2026-06-11-property-based-testing.md)) — fuzz arbitrary harness event sequences and assert ACP-stream invariants (never a `tool_call_update` before its `tool_call`; exactly one `session/prompt` resolution per prompt; monotonic, well-formed ordering; `stopReason` in the legal set); codec unit tests over an in-memory `Duplex` pair (drive `AgentSideConnection` without a subprocess; assert exact frames for `initialize`, `session/new`, a full prompt turn); the mandatory HMR-safety test (dispose the fiber; assert the connection closed, all `ctx.on` listeners gone, any in-flight `request_permission` settled); failure-path tests (connection closes mid-stream; closes with a permission pending; a notification `send()` rejects but the turn survives; `finish{kind:'error'|'aborted'}`; a `tools/execute` throw with no `tool/result`; a second `session/new` rejected; a `session/prompt` while one is in flight; an empty prompt rejected without hanging; a `session/load` re-derives identical history and replays it); and an e2e (`*.e2e.ts`, self-skips without `DEEPSEEK_API_KEY`) that boots `examples/acp-agent`, connects a `ClientSideConnection`, sends a real prompt, owns and disposes the harness in `afterEach`, and verifies the world (files on disk), not the agent's self-report. diff --git a/packages/core/agent-loop/src/loop.ts b/packages/core/agent-loop/src/loop.ts index d08b5ccdba..eb55a8524d 100644 --- a/packages/core/agent-loop/src/loop.ts +++ b/packages/core/agent-loop/src/loop.ts @@ -158,7 +158,7 @@ export interface LoopHandle { * req = {model, system, tools, messages: session.deriveMessages(), signal} * req = waterfall agent/request ⟵ hooks/model-switch * stream ctx.llm.stream(req) ⟵ waterfall llm/stream (raw chunks) - * session('assistant/chunk'); emit agent/stream-chunk + * session('assistant/chunk') * msg = waterfall agent/step-result ⟵ BEFORE the log append, so the * session('assistant/message' {content, usage?}) session records what actually ran * each tool-call in msg (sequential, abort-checked): @@ -681,7 +681,6 @@ async function runStep( if (signal.aborted) throw new Error(String(signal.reason ?? 'aborted')) const chunkEvent = session.append('assistant/chunk', { turn, step, chunk }) chunkSeqs.push(chunkEvent.seq) - ctx.emit('agent/stream-chunk', agent, turn, step, chunk) assembler.push(chunk) } diff --git a/packages/core/agent-loop/tests/cancel.spec.ts b/packages/core/agent-loop/tests/cancel.spec.ts index bfaf22364b..0e77f0bcbf 100644 --- a/packages/core/agent-loop/tests/cancel.spec.ts +++ b/packages/core/agent-loop/tests/cancel.spec.ts @@ -176,7 +176,7 @@ describe('Agent.cancel()', () => { // the step (the turn-scoped marker, not the step AbortController, is what // catches this) — no model step runs. let streamed = false - ctx.on('agent/stream-chunk', () => { streamed = true }) + ctx.on('session/event', (_s, event) => { if (event.type === 'assistant/chunk') streamed = true }) const dispose = ctx.on('session/event', (session, event) => { if (session === agent.session && event.type === 'turn/start') agent.cancel('from turn-start') }) @@ -205,7 +205,7 @@ describe('Agent.cancel()', () => { // cancel check (the one that must closeStep() to balance the already-open // step) — distinct from a turn-start cancel, caught before the step opens. let streamed = false - ctx.on('agent/stream-chunk', () => { streamed = true }) + ctx.on('session/event', (_s, event) => { if (event.type === 'assistant/chunk') streamed = true }) const dispose = ctx.on('session/event', (session, event) => { if (session === agent.session && event.type === 'step/start') agent.cancel('from step-start') }) @@ -245,7 +245,7 @@ describe('Agent.cancel()', () => { let disposalDone: Promise | undefined let streamed = false - ctx.on('agent/stream-chunk', () => { streamed = true }) + ctx.on('session/event', (_s, event) => { if (event.type === 'assistant/chunk') streamed = true }) ctx.on('session/event', (session, event) => { if (session === agent.session && event.type === 'step/start') disposalDone = handle.dispose() }) @@ -308,7 +308,7 @@ describe('Agent.cancel()', () => { // runTurn. The second check (after the running flip) must drop the turn — // runTurn would otherwise throw on the now-empty queue. let streamed = false - ctx.on('agent/stream-chunk', () => { streamed = true }) + ctx.on('session/event', (_s, event) => { if (event.type === 'assistant/chunk') streamed = true }) const dispose = ctx.on('agent/status', (subject, status) => { if (subject === agent && status === 'running') agent.cancel('from running listener') }) diff --git a/packages/core/agent-loop/tests/loop.spec.ts b/packages/core/agent-loop/tests/loop.spec.ts index 25b13185da..070c76928a 100644 --- a/packages/core/agent-loop/tests/loop.spec.ts +++ b/packages/core/agent-loop/tests/loop.spec.ts @@ -137,21 +137,17 @@ describe('agent loop', () => { expect(request!.tools?.map(t => t.name)).toEqual(['noop']) }) - it('records raw chunks for replay and emits agent/stream-chunk', async () => { + it('records raw chunks for replay as assistant/chunk session events', async () => { const adapter = new MockAdapter([textResponse('abc')]) const ctx = await harness(adapter) const agent = ctx.agentLoop.create(AgentId('a1'), { model: 'mock' }) - const streamed: StreamChunk[] = [] - ctx.on('agent/stream-chunk', (_agent, _turn, _step, chunk) => void streamed.push(chunk)) - send(agent, 'hi') await waitForIdle(ctx, agent) const chunkEvents = agent.session.events.filter(e => e.type === 'assistant/chunk') // textResponse('abc') = block-start + 3 deltas + block-end + usage + finish = 7 expect(chunkEvents).toHaveLength(7) - expect(streamed).toHaveLength(7) // replay: chunk events alone re-assemble to the recorded assistant message const deltaText = chunkEvents .flatMap(e => e.type === 'assistant/chunk' ? [e.data.chunk] : []) @@ -685,10 +681,10 @@ describe('agent loop', () => { ctx.on('session/event', (_s, event) => { if (event.type === 'turn/start') turns.push(event.data.turn) }) // queue two messages while idle — first starts turn 1 immediately; - // queue the second during turn 1 via a stream-chunk hook + // queue the second during turn 1 when the first assistant chunk streams let queued = false - ctx.on('agent/stream-chunk', () => { - if (!queued) { + ctx.on('session/event', (_s, event) => { + if (event.type === 'assistant/chunk' && !queued) { queued = true send(agent, 'second message') } diff --git a/packages/core/agent/src/types.ts b/packages/core/agent/src/types.ts index a8e2113b25..dd01831130 100644 --- a/packages/core/agent/src/types.ts +++ b/packages/core/agent/src/types.ts @@ -19,7 +19,7 @@ * live `Agent`. Two shapes: INTERCEPTION seams (the `agent/prompt-submit`/ * `agent/request`/`agent/step-result`/`agent/turn-continuation` waterfalls and * the serial `agent/pre-step`) that mutate/veto, and TRANSIENT emits - * (`agent/status`, `agent/stream-chunk`, `agent/error`, `agent/created`/ + * (`agent/status`, `agent/error`, `agent/created`/ * `agent/disposed`, `agent/queued`, `agent/steering`, `agent/session-start`) * that notify with the `Agent` in hand. Turn/step boundaries are NOT here — * they are durable `session/event` records. Answers "right now, with the agent @@ -44,7 +44,7 @@ */ import type { Branded } from '@deepseek-ai/dsh-brand' -import type { ContentBlock, GenerateOptions, Message, MessageSource, StreamChunk } from '@deepseek-ai/dsh-llm' +import type { ContentBlock, GenerateOptions, Message, MessageSource } from '@deepseek-ai/dsh-llm' /** Identifies one live agent in the registry. */ export type AgentId = Branded<'AgentId'> @@ -340,11 +340,6 @@ declare module 'cordis' { 'agent/turn-continuation'(agent: Agent, turn: number, defaultDecision: ContinuationDecision, next: () => Promise): Promise // ---- streaming + tool notifications (emit) ---- - /** - * A raw {@link StreamChunk} arrived from the model (token-level UI/log feed). - * @mode emit - */ - 'agent/stream-chunk'(agent: Agent, turn: number, step: number, chunk: StreamChunk): void /** * Steering content was injected into a running turn. * @mode emit diff --git a/packages/support/ui-stdio/README.md b/packages/support/ui-stdio/README.md index 7e88bbc459..8e0ff86227 100644 --- a/packages/support/ui-stdio/README.md +++ b/packages/support/ui-stdio/README.md @@ -1,6 +1,6 @@ # @deepseek-ai/dsh-ui-stdio -A minimal stdio (readline) UI, as a plugin. It reads lines from stdin and feeds them to an agent (`send` when idle, `steer` while a turn is running), and renders that agent's streamed output and tool activity to stdout. A UI is "just a plugin" here — it consumes the `session/event` transcript feed plus a few `agent/*` control events (`agent/stream-chunk`, `agent/status`, `agent/created`/`agent/disposed`) and the `agents` service (`inject: ['agents']`), so the same plugin drives any example or product surface. +A minimal stdio (readline) UI, as a plugin. It reads lines from stdin and feeds them to an agent (`send` when idle, `steer` while a turn is running), and renders that agent's streamed output and tool activity to stdout. A UI is "just a plugin" here — it consumes the `session/event` transcript feed plus a few `agent/*` control events (`agent/status`, `agent/created`/`agent/disposed`) and the `agents` service (`inject: ['agents']`), so the same plugin drives any example or product surface. This is a **convenience REPL for local testing and the demos, not a product surface** — its observable behavior is free to change. It is deliberately NOT treated as a load-bearing consumer when weighing whether a live event/API must exist: the boundary mirror events were removed precisely because "ui-stdio renders from them" is not a product constraint (it was migrated to `session/event`). The real product surfaces are the ACP bridge (`dsh-acp`) and the app packages. @@ -24,8 +24,7 @@ This package consolidates what were two near-identical copies under `examples/ec Rendering is **global** — every agent's events are written to stdout, not just `config.agent`'s. `config.agent` scopes only *input* (which agent stdin drives) and the EOF-exit gate; the single-agent demos this serves have just one agent, so the distinction is moot for them. (A multi-agent UI that needs per-agent panes would filter these handlers by the agent argument — deliberately out of scope here.) -- `agent/stream-chunk` — `text-delta` is written verbatim; `reasoning-delta` is wrapped in the dim SGR (`\x1B[2m … \x1B[0m`) so the chain-of-thought is visually subordinate to the answer. Reasoning rendering is inert when no `reasoning-delta` chunks arrive (e.g. a mock model), so it is always on. -- `session/event` — the durable transcript feed drives all boundary and content rendering: `turn/start` prints a `[ turn N]` header (the short agent label comes from a session-id→agent-id map seeded from `ctx.agents.list()` at install and kept live via `agent/created`/`agent/disposed`, since the turn event carries only the turn number), `turn/end` prints the trailing `> ` prompt, `tool/call` renders `[tool call] name(args)`, `tool/result` renders the joined text blocks as `[tool result] …`, and `todo/write` renders a glyphed checklist. +- `session/event` — the durable transcript feed drives ALL rendering, from a single listener so `inReasoning` transitions stay deterministic in append order: `assistant/chunk` writes the model's `text-delta` verbatim and wraps `reasoning-delta` in the dim SGR (`\x1B[2m … \x1B[0m`) so the chain-of-thought is visually subordinate to the answer (inert when no `reasoning-delta` chunks arrive, e.g. a mock model); `turn/start` prints a `[ turn N]` header (the short agent label comes from a session-id→agent-id map seeded from `ctx.agents.list()` at install and kept live via `agent/created`/`agent/disposed`, since the turn event carries only the turn number); `turn/end` prints the trailing `> ` prompt; `tool/call` renders `[tool call] name(args)`; `tool/result` renders the joined text blocks as `[tool result] …`; and `todo/write` renders a glyphed checklist. ## The I/O seam diff --git a/packages/support/ui-stdio/src/index.ts b/packages/support/ui-stdio/src/index.ts index 9be922426f..8bee2e4baa 100644 --- a/packages/support/ui-stdio/src/index.ts +++ b/packages/support/ui-stdio/src/index.ts @@ -1,8 +1,10 @@ /** * Minimal stdio UI plugin: reads lines from stdin → `agent.send()`/`steer()`, - * and renders the agent's stream chunks and tool activity to stdout. A UI is - * "just a plugin" — it only consumes the `agent/*` event taxonomy and the - * `agents` service, so the same plugin drives any example or product surface. + * and renders the durable transcript to stdout. A UI is "just a plugin" — it + * consumes the `session/event` feed (the assistant token stream, turn/step + * boundaries, tool activity, todos) plus a few `agent/*` control events + * (`agent/status`, `agent/created`/`agent/disposed`) and the `agents` service, + * so the same plugin drives any example or product surface. * * Consolidates what were two near-identical copies under `examples/echo-agent` * and `examples/coding-agent` (the latter a superset). This package IS that @@ -91,25 +93,26 @@ export function createStdioChat(ctx: Context, config: Config, runtime: StdioRunt ctx.on('agent/created', (agent) => { labelBySession.set(agent.session.header.id, agent.id) }) ctx.on('agent/disposed', (agent) => { labelBySession.delete(agent.session.header.id) }) + // Transcript rendering off the durable `session/event` feed — the assistant + // token stream, turn/step boundaries, tool activity, and todos all come from + // the one canonical stream (no agent/* mirrors). A single listener over the + // append order keeps `inReasoning` transitions deterministic across chunk and + // boundary events. let inReasoning = false - ctx.on('agent/stream-chunk', (_agent, _turn, _step, chunk) => { - if (chunk.type === 'reasoning-delta') { - // Dim the chain-of-thought so the final answer stands out. - if (!inReasoning) output.write('\x1B[2m') - inReasoning = true - output.write(chunk.text) - } else if (chunk.type === 'text-delta') { - if (inReasoning) output.write('\x1B[0m\n') - inReasoning = false - output.write(chunk.text) - } - }) - - // Transcript rendering off the durable `session/event` feed — turn/step - // boundaries, tool activity, and todos all come from the one canonical stream - // (no agent/* boundary mirrors). ctx.on('session/event', (session, event) => { - if (event.type === 'turn/start') { + if (event.type === 'assistant/chunk') { + const { chunk } = event.data + if (chunk.type === 'reasoning-delta') { + // Dim the chain-of-thought so the final answer stands out. + if (!inReasoning) output.write('\x1B[2m') + inReasoning = true + output.write(chunk.text) + } else if (chunk.type === 'text-delta') { + if (inReasoning) output.write('\x1B[0m\n') + inReasoning = false + output.write(chunk.text) + } + } else if (event.type === 'turn/start') { const label = labelBySession.get(session.header.id) ?? session.header.id output.write(`\n[${label} turn ${event.data.turn}] `) } else if (event.type === 'turn/end') { diff --git a/packages/support/ui-stdio/tests/ui-stdio.spec.ts b/packages/support/ui-stdio/tests/ui-stdio.spec.ts index bf75c528c3..e991370c39 100644 --- a/packages/support/ui-stdio/tests/ui-stdio.spec.ts +++ b/packages/support/ui-stdio/tests/ui-stdio.spec.ts @@ -3,7 +3,7 @@ import { describe, expect, it, vi } from 'vitest' import { Context } from 'cordis' import type { Agent, AgentStatus } from '@deepseek-ai/dsh-agent' import AgentRegistry from '@deepseek-ai/dsh-agent' -import type { ContentBlock } from '@deepseek-ai/dsh-llm' +import type { ContentBlock, StreamChunk } from '@deepseek-ai/dsh-llm' import type { Session, SessionEvent } from '@deepseek-ai/dsh-session' import { createStdioChat, type Config, type StdioRuntime } from '../src/index.ts' @@ -69,6 +69,11 @@ function makeSession(agentId: string): Session { return { header: { id: `${agentId}-session` } } as Session } +/** An `assistant/chunk` session event carrying one raw stream chunk. */ +function chunkEvent(chunk: StreamChunk): SessionEvent { + return { type: 'assistant/chunk', seq: 0, time: 0, data: { turn: 1, step: 0, chunk } } +} + const CONFIG: Config = { welcome: 'hi there', agent: 'main' } async function setup(config: Config = CONFIG, runtimeOver: Partial = {}) { @@ -102,25 +107,23 @@ describe('createStdioChat rendering', () => { it('renders text-delta chunks verbatim', async () => { const { ctx, out } = await setup() - const agent = makeAgent('main') - ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'text-delta', index: 0, text: 'hello' }) + ctx.emit('session/event', makeSession('main'), chunkEvent({ type: 'text-delta', index: 0, text: 'hello' })) expect(out.text()).toContain('hello') }) it('wraps reasoning-delta in the dim SGR and resets on the following text-delta', async () => { const { ctx, out } = await setup() - const agent = makeAgent('main') - ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'reasoning-delta', index: 0, text: 'think' }) - ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'reasoning-delta', index: 0, text: 'more' }) - ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'text-delta', index: 0, text: 'answer' }) + const session = makeSession('main') + ctx.emit('session/event', session, chunkEvent({ type: 'reasoning-delta', index: 0, text: 'think' })) + ctx.emit('session/event', session, chunkEvent({ type: 'reasoning-delta', index: 0, text: 'more' })) + ctx.emit('session/event', session, chunkEvent({ type: 'text-delta', index: 0, text: 'answer' })) expect(out.text()).toContain('\x1B[2mthinkmore\x1B[0m\nanswer') }) it('ignores stream-chunk types it does not render', async () => { const { ctx, out } = await setup() const before = out.text() - const agent = makeAgent('main') - ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'block-start', index: 0, blockType: 'text' }) + ctx.emit('session/event', makeSession('main'), chunkEvent({ type: 'block-start', index: 0, blockType: 'text' })) expect(out.text()).toBe(before) }) @@ -171,9 +174,9 @@ describe('createStdioChat rendering', () => { it('resets dim styling at turn/end if a turn ends mid-reasoning', async () => { const { ctx, out } = await setup() - const agent = makeAgent('main') - ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'reasoning-delta', index: 0, text: 'mid' }) - ctx.emit('session/event', makeSession('main'), { + const session = makeSession('main') + ctx.emit('session/event', session, chunkEvent({ type: 'reasoning-delta', index: 0, text: 'mid' })) + ctx.emit('session/event', session, { type: 'turn/end', seq: 1, time: 0, data: { turn: 1, reason: { kind: 'completed' } }, } as SessionEvent) expect(out.text()).toContain('\x1B[2mmid\x1B[0m') @@ -230,8 +233,7 @@ describe('createStdioChat rendering', () => { it('resets dim styling when a todo/write interrupts reasoning', async () => { const { ctx, out } = await setup() - const agent = makeAgent('main') - ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'reasoning-delta', index: 0, text: 'r' }) + ctx.emit('session/event', {} as Session, chunkEvent({ type: 'reasoning-delta', index: 0, text: 'r' })) ctx.emit('session/event', {} as Session, { type: 'todo/write', seq: 1, time: 0, data: { todos: [{ content: 'a task', status: 'pending' }] }, @@ -241,9 +243,8 @@ describe('createStdioChat rendering', () => { it('resets dim styling when a tool/call interrupts reasoning', async () => { const { ctx, out } = await setup() - const agent = makeAgent('main') - ctx.emit('agent/stream-chunk', agent, 1, 0, { type: 'reasoning-delta', index: 0, text: 'r' }) const session = {} as Session + ctx.emit('session/event', session, chunkEvent({ type: 'reasoning-delta', index: 0, text: 'r' })) ctx.emit('session/event', session, { type: 'tool/call', seq: 1, time: 0, data: { turn: 1, step: 0, callId: 'c1', name: 'bash', arguments: '{}' }, From e100c52154e01b030ce92b37b543e739fe78fb8a Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Fri, 3 Jul 2026 00:06:39 +0800 Subject: [PATCH 41/47] docs(agent): drop agent/stream-chunk from the two package READMEs Codex convergence caught stale prose the doc-sync gate does not scan: the dsh-agent README still listed `agent/stream-chunk` as an emit and the dsh-agent-loop README still told UI plugins to listen on it. A plugin author following either would silently get no chunks. Point both at the `session/event` `assistant/chunk` feed (the agent-loop UI line also names the `agent/*` control events a UI still uses). --- packages/core/agent-loop/README.md | 2 +- packages/core/agent/README.md | 1 - 2 files changed, 1 insertion(+), 2 deletions(-) diff --git a/packages/core/agent-loop/README.md b/packages/core/agent-loop/README.md index 1cf6028f98..60b8a5d779 100644 --- a/packages/core/agent-loop/README.md +++ b/packages/core/agent-loop/README.md @@ -88,4 +88,4 @@ Everything that goes beyond "call the model, run the tools, repeat" belongs to p - Sandbox, permission, plan mode: `tools/pre-execute` (deny/ask gate), `tools/post-execute` - Sub-agents: implemented outside the loop as `ctx.subagents` providers; in-process providers use `ctx.agents.create()` and owned `AgentHandle` teardown, while child streaming/progress and background/poll collection remain deferred. - Persistence: `session/event` + `session/flush` -- UI: `agent/stream-chunk` + `agent/*` events +- UI: `session/event` (assistant token stream, boundaries, tool activity) + `agent/*` control events (`agent/status`, `agent/created`/`agent/disposed`) diff --git a/packages/core/agent/README.md b/packages/core/agent/README.md index 105014ca77..1e7dfc2a00 100644 --- a/packages/core/agent/README.md +++ b/packages/core/agent/README.md @@ -52,7 +52,6 @@ Tool interception is the `tools/pre-execute` / `tools/post-execute` pair in [`ds #### Streaming + tool (emit) -- `agent/stream-chunk` — raw chunk from the model (token-level UI/log feed) - `agent/steering` — steering content injected mid-turn - `agent/error` — step/turn error From 5481887cd381ff849fb6fcf6cd186934816fbf5a Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Fri, 3 Jul 2026 00:12:37 +0800 Subject: [PATCH 42/47] docs(agent): point the streaming reader at session/event assistant/chunk Follow-up to the README fix: the dsh-agent README's emit section had lost its streaming entry, leaving a "Streaming + tool" heading with no pointer to where the token stream now lives. Rename the section to "Live control notifications" and add a line directing readers to the durable `session/event` `assistant/chunk` feed. --- packages/core/agent/README.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/packages/core/agent/README.md b/packages/core/agent/README.md index 1e7dfc2a00..f4eb61c2bd 100644 --- a/packages/core/agent/README.md +++ b/packages/core/agent/README.md @@ -50,11 +50,13 @@ Turn and step boundaries are NOT mirrored as `agent/*` emits: a consumer that ne Tool interception is the `tools/pre-execute` / `tools/post-execute` pair in [`dsh-tools`](../tools/README.md) (`PreToolDecision` allow/deny/ask, `PostToolDecision` accept/block) — same typed-Decision idiom, owned there because it is the tool registry's seam. -#### Streaming + tool (emit) +#### Live control notifications (emit) - `agent/steering` — steering content injected mid-turn - `agent/error` — step/turn error +The model's token stream is NOT an `agent/*` event: read it off the durable `session/event` feed as `assistant/chunk` (the same feed persistence and the ACP bridge use). + ### Agent interface (`types.ts`) The handle every plugin programs against: From d94220475957c943a2f92289ef07c794cafd91f7 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Fri, 3 Jul 2026 01:01:58 +0800 Subject: [PATCH 43/47] docs(AGENTS): distill process lessons from the hooks stack (#118-#129) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Retrospective on the whole stacked-PR effort. Adds a "Landing changes cleanly: gates, Codex, and scope" section capturing the workflow lessons the effort surfaced, and two codebase-specific traps to Defensive patterns. The through-line: a mechanical gate proves lines ran and types check, never that a test guards anything or that prose is accurate — so layer the human/AI judgment on top, in order, and keep each unit honestly scoped: - prove every regression test RED on the unfixed code (top-billed, not a nit) - run the FULL test:coverage, not an isolated -t filter (test-isolation bugs) - spend Codex on what gates can't see (prose/RFC/comment drift, self-introduced fix bugs), scoped to ONE concern per review (a two-fix prompt timed out) - a mid-review cleanup that exceeds the reviewed RFC scope goes in a NEW stacked PR; enumerate consumers + grill before deleting a seam - regenerate a generated artifact as part of the invalidating edit, not as a gate to fail; lint:fix before hand-fixing - read a failure before reacting: ENOSPC watcher exhaustion is environmental, not a code regression Defensive-patterns additions (both bit us this cycle): spawn narrows non-null stdout/stderr only from a literal stdio tuple; AgentLoop.create() drops options.meta (only the async factory threads it). --- AGENTS.md | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/AGENTS.md b/AGENTS.md index 8438295683..47109ebfbe 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -34,6 +34,19 @@ A wave of review comments lands across several PRs in a dependent stack (`A ← - **Delegated work is trust-but-verify.** When sub-agents implement fixes in parallel, their report describes what they INTENDED, not necessarily what landed. Re-run the gates yourself on the actual tree, and for a regression guard, **prove it FAILS on the unfixed code** (introduce the regression, watch the test go red, revert) — a guard that passes both ways guards nothing. A sub-agent that "reframes the problem as already-handled" instead of fixing it is a signal to dig in personally, not to accept the reframing. - **Triage on the merits, then reply in-thread.** Verify each comment against the code before acting (a reviewer flagging the right symptom can still mis-diagnose the cause — confirm both). Reply in the GitHub review thread (`gh api …/pulls/{pr}/comments/{id}/replies`), not as a top-level comment, stating the fix and the commit that carries it. +## Landing changes cleanly: gates, Codex, and scope + +Hard-won from the hooks stack (#118–#129). The recurring theme: a mechanical gate proves lines ran and types check; it does NOT prove semantics, doc accuracy, or that a test guards anything. Layer the cheap human/AI judgment on top, in the right order, and keep each unit of work honestly scoped. + +- **Every regression test must be proven RED on the unfixed code, and this is the top-billed discipline, not a footnote.** Neuter the fix (comment out the one line, or revert the source), run the new test, watch it fail, then restore. A guard that passes both ways guards nothing — and a green 100%-coverage suite actively hides this (the line ran; it just asserted nothing load-bearing). This caught real bugs repeatedly here: a `structuredClone` aliasing fix, a bridge `expectedEventName` discriminator guard, a blocking-Stop-hook reason fallback. Do it for EVERY guard, every time; the proof takes thirty seconds and is the only thing that certifies the test. +- **Run `pnpm run test:coverage` (the FULL suite), not an isolated `-t` filter, before trusting green.** Test-isolation bugs surface only in the full run: here twelve fixed-`setTimeout` waits raced under full-suite load and passed in isolation but flaked together — fixed by replacing every fixed sleep with a `waitFor(predicate)` poll (ties to [§ Defensive patterns](#defensive-patterns-hard-won) "Async state is not synchronous state"). A suite that is green under `-t ` but red under `test:coverage` is telling you about shared state, not a flake to rerun. +- **Codex convergence is for the class of defect gates STRUCTURALLY cannot catch — spend it there.** `xhigh` Codex reliably finds what `typecheck`/`lint`/`coverage`/`doc-sync` are blind to: (a) **prose/RFC/comment drift** the doc-sync scope doesn't scan — e.g. two package READMEs still advertising a removed event, or an RFC claiming a `block` decision "carries context too" when that union has no such field; (b) **a bug you INTRODUCED while fixing** — the fix's own new branch, un-covered by the test you wrote for the original bug; (c) **dishonest test comments** blessing a wrong assertion. Treat a Codex finding as a claim to verify against the code, then re-bucket it yourself (its own (A)/(B)/(C) label is an input, not a verdict) — but know that "clean gates" is exactly when Codex earns its keep. +- **Scope a Codex review to ONE fix or concern.** A convergence prompt bundling two independent fixes plus verification context timed out at the 850s cap with no verdict — a wasted ~14-minute run — then completed fine once split into two smaller serial reviews. One concern per review is faster AND yields a sharper verdict. (For the invocation: the prompt is a POSITIONAL arg to `ask-codex.sh`, not `--file`; the only flags are `--codex-model`, `--codex-timeout`. Multi-paragraph prompts go via `"$(cat file)"`.) +- **A cleanup or removal discovered mid-review that exceeds the reviewed RFC's scope goes in a NEW stacked PR, even though pre-release churn is cheap.** Do not retroactively widen a diff a reviewer already signed off on, and do not fold a fresh decision into a converged PR. Before deleting an event/seam, first enumerate every consumer and prove redundancy (here: `agent/stream-chunk` was proven a pure mirror of the durable `assistant/chunk` — ACP already read the durable one, the stdio UI ignored the live-only args), then grill the removal ("am I deleting a seam someone will re-add?"). The removal became its own PR-G with its own RFC, not an amendment to the reviewed #118. +- **Regenerate a generated artifact as PART of the edit that invalidates it, not as a gate to fail.** Any edit to a `types.ts` `interface Events`/`Context` block or a module doc the generator reads makes `docs/cordis-catalog/events-and-services.md` stale; run `pnpm run gen-cordis-catalog` (and `gen-module-graph`) in the same step rather than letting `doc-sync` discover it. Likewise run `pnpm run lint:fix` before hand-fixing a new test file — the auto-fixable churn (quotes, `max-len`) should never consume review attention meant for the real errors. +- **Read a failure before reacting: environmental ≠ code.** `ENOSPC: file watchers` from many concurrent worktrees fails the `tsx`-based `demo:echo` smoke, but the label/output already rendered correctly before the watcher died and the published-artifact built-bin smoke (plain `node`, no watcher) is unaffected. Recognize the class on the FIRST occurrence — fall back to the watcher-free check or prune stale worktrees — rather than burning retry cycles on a transient the code never caused. + + ## Architecture This codebase is based on the **Cordis** framework, built microkernel-style: **everything is a plugin**. All necessary Cordis dependencies are copied into this monorepo as vendored source (under `vendor/`) instead of being depended on via npm. @@ -275,6 +288,8 @@ Each bullet is a bug class that bit us; the rule prevents the reoccurrence. - **A real-load-path test only GUARDS the export shape if a broken shape actually FAILS it.** The original crash (`cannot get property … without inject`) fired because that plugin HAS `inject`. A plugin with NO `inject` (a composition/bundle plugin that mounts children carrying their own inject, e.g. `dsh-agent-core` and the app packages) does NOT crash on a stray `export default` — `unwrapExports` silently drops `Config`/`name` and the plugin boots anyway — so a Loader smoke stays green while the export shape is broken. For such plugins add an EXPLICIT assertion that the regression fails: `expect('default' in mod).toBe(false)` plus running the module through the real `Loader.prototype.unwrapExports` and asserting `name`/`Config`/`apply` survive. Prove it: add `export default apply`, watch the test go red, revert. - **"Real entry path" means the PUBLISHED ARTIFACT, not the dev runtime.** A test (or a `demo:*` smoke) that boots `src/bin.ts` under `tsx` is NOT the same code a consumer runs — the package `bin` field points at the built `lib/bin.js` under plain `node`. tsx masks failure modes the published artifact has: a boot settle-race that exits 0 before the app's handles attach, module-resolution differences (the unbuilt `paths` map vs node_modules), and a load failure that `loader.await()`'s `Promise.allSettled` SWALLOWS so a typo'd config silently exits 0. The guard is a smoke that runs the built `lib/bin.js` under plain `node` in a node_modules-shaped temp dir (symlinked workspace + vendor packages), asserts the real output, AND asserts a genuinely-missing config exits NON-ZERO. The tsx demo is necessary but not sufficient; the published-bin smoke is what catches "green under tsx, broken on install". - **Tag spelling and EOF hygiene.** cordis.yml interpolates env via the `!!js` tag (js-yaml resolves custom tags under `tag:yaml.org,2002:js`), not `!js` — keep code, comments, and docs consistent. Files end with exactly one trailing newline; `git diff --check` (a pre-push gate) rejects new blank lines at EOF. +- **`child_process.spawn` narrows non-null `stdout`/`stderr` only from a LITERAL `stdio` tuple.** A ternary or variable in a `stdio` slot (e.g. `stdio: [wantStdin ? 'pipe' : 'ignore', 'pipe', 'pipe']`) selects the generic `spawn` overload, widening the child's streams to nullable — which then trips `no-non-null-assertion` (forbidden in `src`). Write two full `spawn(...)` calls with literal tuples in an `if`/`else` (or a ternary between two complete calls), as [`dsh-bash-local`'s `run.ts`](packages/bash/bash-local/src/run.ts) does, so each branch's literal tuple keeps the typed overload. This trap bit twice — recognize it the moment a conditional `stdio` slot appears. +- **`AgentLoop.create(id, options)` DROPS `options.meta` — only the async factory path threads it.** The synchronous `create()` prepares its session with a hardcoded `{ meta: {} }`; a test (or caller) that needs `session.header.cwd` or other header metadata to take effect must use the factory `ctx.agents.create({ agentId, sessionId, meta, agentOptions })` (or `resume`), which passes `meta: options.meta ?? {}`. A cwd-dependent test that silently sees an empty cwd is almost always this. See `packages/core/agent-loop/src/index.ts`. ## Type Safety and Documentation From 907c8d387100514c3c1671d4d029cf3cf53b0959 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Fri, 3 Jul 2026 01:25:34 +0800 Subject: [PATCH 44/47] docs(AGENTS): fix two factual imprecisions caught by Codex MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Codex convergence verified the retrospective's claims against the code and caught two inaccuracies (everything else — the spawn-overload claim, create() dropping meta, ask-codex invocation, test:coverage guidance, waitFor, markdown — checked out): - The meta-threading factory `ctx.agents.create()` (createAgent) is SYNCHRONOUS, not "the async factory path"; the async one is `resume` (which reloads the persisted header). Reworded. - The generated-artifact bullet conflated triggers: gen-cordis-catalog reads `interface Events`/`Context` member JSDoc (not top module docs); gen-module-graph is driven by package peerDependencies (not event/doc edits); and module-graph freshness is `verify-module-graph`, a SEPARATE gate from `doc-sync`. Split the guidance per artifact. --- AGENTS.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/AGENTS.md b/AGENTS.md index 47109ebfbe..2985859fe5 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -43,7 +43,7 @@ Hard-won from the hooks stack (#118–#129). The recurring theme: a mechanical g - **Codex convergence is for the class of defect gates STRUCTURALLY cannot catch — spend it there.** `xhigh` Codex reliably finds what `typecheck`/`lint`/`coverage`/`doc-sync` are blind to: (a) **prose/RFC/comment drift** the doc-sync scope doesn't scan — e.g. two package READMEs still advertising a removed event, or an RFC claiming a `block` decision "carries context too" when that union has no such field; (b) **a bug you INTRODUCED while fixing** — the fix's own new branch, un-covered by the test you wrote for the original bug; (c) **dishonest test comments** blessing a wrong assertion. Treat a Codex finding as a claim to verify against the code, then re-bucket it yourself (its own (A)/(B)/(C) label is an input, not a verdict) — but know that "clean gates" is exactly when Codex earns its keep. - **Scope a Codex review to ONE fix or concern.** A convergence prompt bundling two independent fixes plus verification context timed out at the 850s cap with no verdict — a wasted ~14-minute run — then completed fine once split into two smaller serial reviews. One concern per review is faster AND yields a sharper verdict. (For the invocation: the prompt is a POSITIONAL arg to `ask-codex.sh`, not `--file`; the only flags are `--codex-model`, `--codex-timeout`. Multi-paragraph prompts go via `"$(cat file)"`.) - **A cleanup or removal discovered mid-review that exceeds the reviewed RFC's scope goes in a NEW stacked PR, even though pre-release churn is cheap.** Do not retroactively widen a diff a reviewer already signed off on, and do not fold a fresh decision into a converged PR. Before deleting an event/seam, first enumerate every consumer and prove redundancy (here: `agent/stream-chunk` was proven a pure mirror of the durable `assistant/chunk` — ACP already read the durable one, the stdio UI ignored the live-only args), then grill the removal ("am I deleting a seam someone will re-add?"). The removal became its own PR-G with its own RFC, not an amendment to the reviewed #118. -- **Regenerate a generated artifact as PART of the edit that invalidates it, not as a gate to fail.** Any edit to a `types.ts` `interface Events`/`Context` block or a module doc the generator reads makes `docs/cordis-catalog/events-and-services.md` stale; run `pnpm run gen-cordis-catalog` (and `gen-module-graph`) in the same step rather than letting `doc-sync` discover it. Likewise run `pnpm run lint:fix` before hand-fixing a new test file — the auto-fixable churn (quotes, `max-len`) should never consume review attention meant for the real errors. +- **Regenerate a generated artifact as PART of the edit that invalidates it, not as a gate to fail.** Know what triggers each: `docs/cordis-catalog/events-and-services.md` is generated from the `interface Events` / `interface Context` member JSDoc (not top module docs), so run `pnpm run gen-cordis-catalog` in the same step you touch an event/service declaration or its JSDoc — rather than letting `verify-cordis-catalog` (part of `doc-sync`) discover it stale. `docs/module-graph.md` is generated from package `peerDependencies`, so regenerate it (`pnpm run gen-module-graph`; checked by the separate `verify-module-graph`, NOT `doc-sync`) only when you change a package's `@deepseek-ai/dsh-*` peer edges. Likewise run `pnpm run lint:fix` before hand-fixing a new test file — the auto-fixable churn (quotes, `max-len`) should never consume review attention meant for the real errors. - **Read a failure before reacting: environmental ≠ code.** `ENOSPC: file watchers` from many concurrent worktrees fails the `tsx`-based `demo:echo` smoke, but the label/output already rendered correctly before the watcher died and the published-artifact built-bin smoke (plain `node`, no watcher) is unaffected. Recognize the class on the FIRST occurrence — fall back to the watcher-free check or prune stale worktrees — rather than burning retry cycles on a transient the code never caused. @@ -289,7 +289,7 @@ Each bullet is a bug class that bit us; the rule prevents the reoccurrence. - **"Real entry path" means the PUBLISHED ARTIFACT, not the dev runtime.** A test (or a `demo:*` smoke) that boots `src/bin.ts` under `tsx` is NOT the same code a consumer runs — the package `bin` field points at the built `lib/bin.js` under plain `node`. tsx masks failure modes the published artifact has: a boot settle-race that exits 0 before the app's handles attach, module-resolution differences (the unbuilt `paths` map vs node_modules), and a load failure that `loader.await()`'s `Promise.allSettled` SWALLOWS so a typo'd config silently exits 0. The guard is a smoke that runs the built `lib/bin.js` under plain `node` in a node_modules-shaped temp dir (symlinked workspace + vendor packages), asserts the real output, AND asserts a genuinely-missing config exits NON-ZERO. The tsx demo is necessary but not sufficient; the published-bin smoke is what catches "green under tsx, broken on install". - **Tag spelling and EOF hygiene.** cordis.yml interpolates env via the `!!js` tag (js-yaml resolves custom tags under `tag:yaml.org,2002:js`), not `!js` — keep code, comments, and docs consistent. Files end with exactly one trailing newline; `git diff --check` (a pre-push gate) rejects new blank lines at EOF. - **`child_process.spawn` narrows non-null `stdout`/`stderr` only from a LITERAL `stdio` tuple.** A ternary or variable in a `stdio` slot (e.g. `stdio: [wantStdin ? 'pipe' : 'ignore', 'pipe', 'pipe']`) selects the generic `spawn` overload, widening the child's streams to nullable — which then trips `no-non-null-assertion` (forbidden in `src`). Write two full `spawn(...)` calls with literal tuples in an `if`/`else` (or a ternary between two complete calls), as [`dsh-bash-local`'s `run.ts`](packages/bash/bash-local/src/run.ts) does, so each branch's literal tuple keeps the typed overload. This trap bit twice — recognize it the moment a conditional `stdio` slot appears. -- **`AgentLoop.create(id, options)` DROPS `options.meta` — only the async factory path threads it.** The synchronous `create()` prepares its session with a hardcoded `{ meta: {} }`; a test (or caller) that needs `session.header.cwd` or other header metadata to take effect must use the factory `ctx.agents.create({ agentId, sessionId, meta, agentOptions })` (or `resume`), which passes `meta: options.meta ?? {}`. A cwd-dependent test that silently sees an empty cwd is almost always this. See `packages/core/agent-loop/src/index.ts`. +- **`AgentLoop.create(id, options)` DROPS `options.meta` — only the programmatic factory `create` threads it.** The convenience `create()` prepares its session with a hardcoded `{ meta: {} }`; a test (or caller) that needs `session.header.cwd` or other header metadata to take effect must use the factory `ctx.agents.create({ agentId, sessionId, meta, agentOptions })` (which passes `meta: options.meta ?? {}`), or `resume` (which reloads the persisted header). Both are synchronous. A cwd-dependent test that silently sees an empty cwd is almost always the wrong creation path. See `packages/core/agent-loop/src/index.ts`. ## Type Safety and Documentation From c699e948e6fd999db39bcd6f278eff2c64bcdce7 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Fri, 3 Jul 2026 23:48:32 +0800 Subject: [PATCH 45/47] =?UTF-8?q?docs(AGENTS):=20fix=20review=20findings?= =?UTF-8?q?=20=E2=80=94=20correct=20resume=20async,=20cut=20stack-locked?= =?UTF-8?q?=20lessons?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Address ds-review-bot review on #131: - Blocking: "Both are synchronous" was wrong for `resume` (`ctx.agents.resume`/`AgentLoop.resume` return `Promise` and await the persisted load). State the true split: `create` is synchronous, `resume` is async. - De-anchor the section: drop the "#118–#129" opening and every hooks-stack reference (agent/stream-chunk, PR-G, #118, ENOSPC-from-worktrees) so the lessons stand alone for a reader who wasn't there, matching the generalized style of the "Orchestrating review feedback" section above it. - Cut bullets that duplicated existing AGENTS.md content: the standalone "prove regression tests RED" bullet (already stated in the Orchestrating section and Defensive patterns) and the ENOSPC "environmental ≠ code" bullet (no repo-specific rule survives generalizing). - Generalize the survivors to their transferable rule; trim the regenerate-artifact bullet to the one gate-backed example. - Collapse the double blank line before ## Architecture. --- AGENTS.md | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/AGENTS.md b/AGENTS.md index 2985859fe5..4b408fafb5 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -36,16 +36,13 @@ A wave of review comments lands across several PRs in a dependent stack (`A ← ## Landing changes cleanly: gates, Codex, and scope -Hard-won from the hooks stack (#118–#129). The recurring theme: a mechanical gate proves lines ran and types check; it does NOT prove semantics, doc accuracy, or that a test guards anything. Layer the cheap human/AI judgment on top, in the right order, and keep each unit of work honestly scoped. - -- **Every regression test must be proven RED on the unfixed code, and this is the top-billed discipline, not a footnote.** Neuter the fix (comment out the one line, or revert the source), run the new test, watch it fail, then restore. A guard that passes both ways guards nothing — and a green 100%-coverage suite actively hides this (the line ran; it just asserted nothing load-bearing). This caught real bugs repeatedly here: a `structuredClone` aliasing fix, a bridge `expectedEventName` discriminator guard, a blocking-Stop-hook reason fallback. Do it for EVERY guard, every time; the proof takes thirty seconds and is the only thing that certifies the test. -- **Run `pnpm run test:coverage` (the FULL suite), not an isolated `-t` filter, before trusting green.** Test-isolation bugs surface only in the full run: here twelve fixed-`setTimeout` waits raced under full-suite load and passed in isolation but flaked together — fixed by replacing every fixed sleep with a `waitFor(predicate)` poll (ties to [§ Defensive patterns](#defensive-patterns-hard-won) "Async state is not synchronous state"). A suite that is green under `-t ` but red under `test:coverage` is telling you about shared state, not a flake to rerun. -- **Codex convergence is for the class of defect gates STRUCTURALLY cannot catch — spend it there.** `xhigh` Codex reliably finds what `typecheck`/`lint`/`coverage`/`doc-sync` are blind to: (a) **prose/RFC/comment drift** the doc-sync scope doesn't scan — e.g. two package READMEs still advertising a removed event, or an RFC claiming a `block` decision "carries context too" when that union has no such field; (b) **a bug you INTRODUCED while fixing** — the fix's own new branch, un-covered by the test you wrote for the original bug; (c) **dishonest test comments** blessing a wrong assertion. Treat a Codex finding as a claim to verify against the code, then re-bucket it yourself (its own (A)/(B)/(C) label is an input, not a verdict) — but know that "clean gates" is exactly when Codex earns its keep. -- **Scope a Codex review to ONE fix or concern.** A convergence prompt bundling two independent fixes plus verification context timed out at the 850s cap with no verdict — a wasted ~14-minute run — then completed fine once split into two smaller serial reviews. One concern per review is faster AND yields a sharper verdict. (For the invocation: the prompt is a POSITIONAL arg to `ask-codex.sh`, not `--file`; the only flags are `--codex-model`, `--codex-timeout`. Multi-paragraph prompts go via `"$(cat file)"`.) -- **A cleanup or removal discovered mid-review that exceeds the reviewed RFC's scope goes in a NEW stacked PR, even though pre-release churn is cheap.** Do not retroactively widen a diff a reviewer already signed off on, and do not fold a fresh decision into a converged PR. Before deleting an event/seam, first enumerate every consumer and prove redundancy (here: `agent/stream-chunk` was proven a pure mirror of the durable `assistant/chunk` — ACP already read the durable one, the stdio UI ignored the live-only args), then grill the removal ("am I deleting a seam someone will re-add?"). The removal became its own PR-G with its own RFC, not an amendment to the reviewed #118. -- **Regenerate a generated artifact as PART of the edit that invalidates it, not as a gate to fail.** Know what triggers each: `docs/cordis-catalog/events-and-services.md` is generated from the `interface Events` / `interface Context` member JSDoc (not top module docs), so run `pnpm run gen-cordis-catalog` in the same step you touch an event/service declaration or its JSDoc — rather than letting `verify-cordis-catalog` (part of `doc-sync`) discover it stale. `docs/module-graph.md` is generated from package `peerDependencies`, so regenerate it (`pnpm run gen-module-graph`; checked by the separate `verify-module-graph`, NOT `doc-sync`) only when you change a package's `@deepseek-ai/dsh-*` peer edges. Likewise run `pnpm run lint:fix` before hand-fixing a new test file — the auto-fixable churn (quotes, `max-len`) should never consume review attention meant for the real errors. -- **Read a failure before reacting: environmental ≠ code.** `ENOSPC: file watchers` from many concurrent worktrees fails the `tsx`-based `demo:echo` smoke, but the label/output already rendered correctly before the watcher died and the published-artifact built-bin smoke (plain `node`, no watcher) is unaffected. Recognize the class on the FIRST occurrence — fall back to the watcher-free check or prune stale worktrees — rather than burning retry cycles on a transient the code never caused. +The recurring failure mode: a mechanical gate proves lines ran and types check; it never proves semantics, doc accuracy, or that a test guards anything. Layer the cheap human/AI judgment on top, in the right order, and keep each unit of work honestly scoped. +- **Run `pnpm run test:coverage` (the FULL suite), not an isolated `-t` filter, before trusting green.** Test-isolation bugs surface only in the full run: fixed-`setTimeout` waits that pass in isolation race under full-suite load and flake together — replace every fixed sleep with a `waitFor(predicate)` poll (ties to [§ Defensive patterns](#defensive-patterns-hard-won) "Async state is not synchronous state"). A suite green under `-t ` but red under `test:coverage` is telling you about shared state, not a flake to rerun. +- **Codex convergence is for the class of defect gates STRUCTURALLY cannot catch — spend it there.** `xhigh` Codex reliably finds what `typecheck`/`lint`/`coverage`/`doc-sync` are blind to: (a) **prose/RFC/comment drift** the doc-sync scope doesn't scan — a package README still advertising a removed event, or an RFC claiming a decision "carries context too" when that union has no such field; (b) **a bug you INTRODUCED while fixing** — the fix's own new branch, un-covered by the test you wrote for the original bug; (c) **dishonest test comments** blessing a wrong assertion. Treat a Codex finding as a claim to verify against the code, then re-bucket it yourself (its own (a)/(b)/(c) label is an input, not a verdict) — but know that "clean gates" is exactly when Codex earns its keep. +- **Scope a Codex review to ONE fix or concern.** A convergence prompt bundling two independent fixes plus verification context timed out at the 850s cap with no verdict, then completed fine once split into two smaller serial reviews. One concern per review is faster AND yields a sharper verdict. (For the invocation: the prompt is a POSITIONAL arg to `ask-codex.sh`, not `--file`; the only flags are `--codex-model`, `--codex-timeout`. Multi-paragraph prompts go via `"$(cat file)"`.) +- **Before deleting an event or seam, enumerate every consumer and prove redundancy, then grill the removal ("am I deleting a seam someone will re-add?").** A seam that is a pure mirror of something a consumer already reads is safe to cut; a live-only field one consumer still uses is not — prove which before removing, not after. +- **Regenerate a generated artifact as PART of the edit that invalidates it, not as a gate to fail.** Know what triggers each: `docs/cordis-catalog/events-and-services.md` is generated from the `interface Events` / `interface Context` member JSDoc (not top module docs), so run `pnpm run gen-cordis-catalog` in the same step you touch an event/service declaration or its JSDoc — rather than letting `verify-cordis-catalog` (part of `doc-sync`) discover it stale. ## Architecture @@ -289,7 +286,7 @@ Each bullet is a bug class that bit us; the rule prevents the reoccurrence. - **"Real entry path" means the PUBLISHED ARTIFACT, not the dev runtime.** A test (or a `demo:*` smoke) that boots `src/bin.ts` under `tsx` is NOT the same code a consumer runs — the package `bin` field points at the built `lib/bin.js` under plain `node`. tsx masks failure modes the published artifact has: a boot settle-race that exits 0 before the app's handles attach, module-resolution differences (the unbuilt `paths` map vs node_modules), and a load failure that `loader.await()`'s `Promise.allSettled` SWALLOWS so a typo'd config silently exits 0. The guard is a smoke that runs the built `lib/bin.js` under plain `node` in a node_modules-shaped temp dir (symlinked workspace + vendor packages), asserts the real output, AND asserts a genuinely-missing config exits NON-ZERO. The tsx demo is necessary but not sufficient; the published-bin smoke is what catches "green under tsx, broken on install". - **Tag spelling and EOF hygiene.** cordis.yml interpolates env via the `!!js` tag (js-yaml resolves custom tags under `tag:yaml.org,2002:js`), not `!js` — keep code, comments, and docs consistent. Files end with exactly one trailing newline; `git diff --check` (a pre-push gate) rejects new blank lines at EOF. - **`child_process.spawn` narrows non-null `stdout`/`stderr` only from a LITERAL `stdio` tuple.** A ternary or variable in a `stdio` slot (e.g. `stdio: [wantStdin ? 'pipe' : 'ignore', 'pipe', 'pipe']`) selects the generic `spawn` overload, widening the child's streams to nullable — which then trips `no-non-null-assertion` (forbidden in `src`). Write two full `spawn(...)` calls with literal tuples in an `if`/`else` (or a ternary between two complete calls), as [`dsh-bash-local`'s `run.ts`](packages/bash/bash-local/src/run.ts) does, so each branch's literal tuple keeps the typed overload. This trap bit twice — recognize it the moment a conditional `stdio` slot appears. -- **`AgentLoop.create(id, options)` DROPS `options.meta` — only the programmatic factory `create` threads it.** The convenience `create()` prepares its session with a hardcoded `{ meta: {} }`; a test (or caller) that needs `session.header.cwd` or other header metadata to take effect must use the factory `ctx.agents.create({ agentId, sessionId, meta, agentOptions })` (which passes `meta: options.meta ?? {}`), or `resume` (which reloads the persisted header). Both are synchronous. A cwd-dependent test that silently sees an empty cwd is almost always the wrong creation path. See `packages/core/agent-loop/src/index.ts`. +- **`AgentLoop.create(id, options)` DROPS `options.meta` — only the programmatic factory `create` threads it.** The convenience `create()` prepares its session with a hardcoded `{ meta: {} }`; a test (or caller) that needs `session.header.cwd` or other header metadata to take effect must use the factory `ctx.agents.create({ agentId, sessionId, meta, agentOptions })` (which passes `meta: options.meta ?? {}`), or `resume` (which reloads the persisted header). `create` is synchronous; `resume` is async — it awaits the persisted load. A cwd-dependent test that silently sees an empty cwd is almost always the wrong creation path. See `packages/core/agent-loop/src/index.ts`. ## Type Safety and Documentation From 4e70489c7335080ad7c6b13d8ad2360180f65133 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Sat, 4 Jul 2026 00:04:48 +0800 Subject: [PATCH 46/47] docs(AGENTS): collapse the section to its theme; drop the two Defensive-patterns additions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The bulleted lessons and the two Defensive-patterns traps did not earn their place. Reduce the new section to its one load-bearing sentence — gates prove lines ran, not semantics/doc-accuracy/that a test guards anything; layer judgment on top and lean on an independent reviewer for what gates can't see — and drop the spawn-narrowing and AgentLoop.create-meta bullets entirely. --- AGENTS.md | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/AGENTS.md b/AGENTS.md index 4b408fafb5..5f06b26765 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -34,15 +34,9 @@ A wave of review comments lands across several PRs in a dependent stack (`A ← - **Delegated work is trust-but-verify.** When sub-agents implement fixes in parallel, their report describes what they INTENDED, not necessarily what landed. Re-run the gates yourself on the actual tree, and for a regression guard, **prove it FAILS on the unfixed code** (introduce the regression, watch the test go red, revert) — a guard that passes both ways guards nothing. A sub-agent that "reframes the problem as already-handled" instead of fixing it is a signal to dig in personally, not to accept the reframing. - **Triage on the merits, then reply in-thread.** Verify each comment against the code before acting (a reviewer flagging the right symptom can still mis-diagnose the cause — confirm both). Reply in the GitHub review thread (`gh api …/pulls/{pr}/comments/{id}/replies`), not as a top-level comment, stating the fix and the commit that carries it. -## Landing changes cleanly: gates, Codex, and scope +## Landing changes cleanly: gates and judgment -The recurring failure mode: a mechanical gate proves lines ran and types check; it never proves semantics, doc accuracy, or that a test guards anything. Layer the cheap human/AI judgment on top, in the right order, and keep each unit of work honestly scoped. - -- **Run `pnpm run test:coverage` (the FULL suite), not an isolated `-t` filter, before trusting green.** Test-isolation bugs surface only in the full run: fixed-`setTimeout` waits that pass in isolation race under full-suite load and flake together — replace every fixed sleep with a `waitFor(predicate)` poll (ties to [§ Defensive patterns](#defensive-patterns-hard-won) "Async state is not synchronous state"). A suite green under `-t ` but red under `test:coverage` is telling you about shared state, not a flake to rerun. -- **Codex convergence is for the class of defect gates STRUCTURALLY cannot catch — spend it there.** `xhigh` Codex reliably finds what `typecheck`/`lint`/`coverage`/`doc-sync` are blind to: (a) **prose/RFC/comment drift** the doc-sync scope doesn't scan — a package README still advertising a removed event, or an RFC claiming a decision "carries context too" when that union has no such field; (b) **a bug you INTRODUCED while fixing** — the fix's own new branch, un-covered by the test you wrote for the original bug; (c) **dishonest test comments** blessing a wrong assertion. Treat a Codex finding as a claim to verify against the code, then re-bucket it yourself (its own (a)/(b)/(c) label is an input, not a verdict) — but know that "clean gates" is exactly when Codex earns its keep. -- **Scope a Codex review to ONE fix or concern.** A convergence prompt bundling two independent fixes plus verification context timed out at the 850s cap with no verdict, then completed fine once split into two smaller serial reviews. One concern per review is faster AND yields a sharper verdict. (For the invocation: the prompt is a POSITIONAL arg to `ask-codex.sh`, not `--file`; the only flags are `--codex-model`, `--codex-timeout`. Multi-paragraph prompts go via `"$(cat file)"`.) -- **Before deleting an event or seam, enumerate every consumer and prove redundancy, then grill the removal ("am I deleting a seam someone will re-add?").** A seam that is a pure mirror of something a consumer already reads is safe to cut; a live-only field one consumer still uses is not — prove which before removing, not after. -- **Regenerate a generated artifact as PART of the edit that invalidates it, not as a gate to fail.** Know what triggers each: `docs/cordis-catalog/events-and-services.md` is generated from the `interface Events` / `interface Context` member JSDoc (not top module docs), so run `pnpm run gen-cordis-catalog` in the same step you touch an event/service declaration or its JSDoc — rather than letting `verify-cordis-catalog` (part of `doc-sync`) discover it stale. +The recurring failure mode: a mechanical gate proves lines ran and types check; it never proves semantics, doc accuracy, or that a test guards anything. Layer the cheap human/AI judgment on top, in the right order, and keep each unit of work honestly scoped — and lean on an independent agent to review for the class of defect gates structurally cannot catch (prose/RFC/comment drift, a bug introduced while fixing, a test that asserts nothing load-bearing). ## Architecture @@ -285,8 +279,6 @@ Each bullet is a bug class that bit us; the rule prevents the reoccurrence. - **A real-load-path test only GUARDS the export shape if a broken shape actually FAILS it.** The original crash (`cannot get property … without inject`) fired because that plugin HAS `inject`. A plugin with NO `inject` (a composition/bundle plugin that mounts children carrying their own inject, e.g. `dsh-agent-core` and the app packages) does NOT crash on a stray `export default` — `unwrapExports` silently drops `Config`/`name` and the plugin boots anyway — so a Loader smoke stays green while the export shape is broken. For such plugins add an EXPLICIT assertion that the regression fails: `expect('default' in mod).toBe(false)` plus running the module through the real `Loader.prototype.unwrapExports` and asserting `name`/`Config`/`apply` survive. Prove it: add `export default apply`, watch the test go red, revert. - **"Real entry path" means the PUBLISHED ARTIFACT, not the dev runtime.** A test (or a `demo:*` smoke) that boots `src/bin.ts` under `tsx` is NOT the same code a consumer runs — the package `bin` field points at the built `lib/bin.js` under plain `node`. tsx masks failure modes the published artifact has: a boot settle-race that exits 0 before the app's handles attach, module-resolution differences (the unbuilt `paths` map vs node_modules), and a load failure that `loader.await()`'s `Promise.allSettled` SWALLOWS so a typo'd config silently exits 0. The guard is a smoke that runs the built `lib/bin.js` under plain `node` in a node_modules-shaped temp dir (symlinked workspace + vendor packages), asserts the real output, AND asserts a genuinely-missing config exits NON-ZERO. The tsx demo is necessary but not sufficient; the published-bin smoke is what catches "green under tsx, broken on install". - **Tag spelling and EOF hygiene.** cordis.yml interpolates env via the `!!js` tag (js-yaml resolves custom tags under `tag:yaml.org,2002:js`), not `!js` — keep code, comments, and docs consistent. Files end with exactly one trailing newline; `git diff --check` (a pre-push gate) rejects new blank lines at EOF. -- **`child_process.spawn` narrows non-null `stdout`/`stderr` only from a LITERAL `stdio` tuple.** A ternary or variable in a `stdio` slot (e.g. `stdio: [wantStdin ? 'pipe' : 'ignore', 'pipe', 'pipe']`) selects the generic `spawn` overload, widening the child's streams to nullable — which then trips `no-non-null-assertion` (forbidden in `src`). Write two full `spawn(...)` calls with literal tuples in an `if`/`else` (or a ternary between two complete calls), as [`dsh-bash-local`'s `run.ts`](packages/bash/bash-local/src/run.ts) does, so each branch's literal tuple keeps the typed overload. This trap bit twice — recognize it the moment a conditional `stdio` slot appears. -- **`AgentLoop.create(id, options)` DROPS `options.meta` — only the programmatic factory `create` threads it.** The convenience `create()` prepares its session with a hardcoded `{ meta: {} }`; a test (or caller) that needs `session.header.cwd` or other header metadata to take effect must use the factory `ctx.agents.create({ agentId, sessionId, meta, agentOptions })` (which passes `meta: options.meta ?? {}`), or `resume` (which reloads the persisted header). `create` is synchronous; `resume` is async — it awaits the persisted load. A cwd-dependent test that silently sees an empty cwd is almost always the wrong creation path. See `packages/core/agent-loop/src/index.ts`. ## Type Safety and Documentation From 74f61c89e33f9303cb8cd8a218e970d6fcca8409 Mon Sep 17 00:00:00 2001 From: Tianyi Cui <53024+tianyicui@users.noreply.github.com> Date: Sat, 4 Jul 2026 00:40:35 +0800 Subject: [PATCH 47/47] test(hooks): snapshot the CC + Codex hook matrix end-to-end MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Load both hook bridges in the ACP example (dsh-hooks-claude → ./hooks.json, dsh-hooks-codex → ./codex-hooks.json) so the full-transcript snapshot tier can exercise each dialect against the real app. An absent config file is a silent no-op, so a scenario carries only the file it needs and the other bridge vanishes — verified byte-identical against every pre-existing snapshot. Add a scenario per hook point × its headline Decision outcome, both dialects: UserPromptSubmit block (authored, keyless) + context-fold, PreToolUse deny/ask, PostToolUse block/context, Stop force-continue. The mid-turn scenarios are recorded against the real API with the hook active, so the model's reaction to a denied/blocked/force-continued turn is part of the replayed transcript. SessionStart and SubagentStart are deliberately excluded (detached best-effort inject races the log position — a recorded golden fails 10/10 on its own replay), as is SubagentStop (observe-only, zero transcript footprint — a golden could never be proven to fail). Both stay on the bridges' unit coverage. See docs/rfc/implemented/testing/2026-07-04-hook-snapshot-matrix.md. --- docs/rfc/README.md | 1 + .../2026-07-04-hook-snapshot-matrix.md | 46 ++ examples/AGENTS.md | 2 +- examples/acp-agent/cordis.snapshot.yml | 11 + examples/acp-agent/cordis.yml | 12 + examples/acp-agent/tests/acp.snapshot.ts | 41 +- .../hook-cc-posttool-block/input.json | 7 + .../hook-cc-posttool-block/session.jsonl | 400 +++++++++++++++ .../stdout.golden.jsonl | 279 +++++++++++ .../workspace/hooks.json | 12 + .../hook-cc-posttool-context/input.json | 7 + .../hook-cc-posttool-context/session.jsonl | 117 +++++ .../stdout.golden.jsonl | 70 +++ .../workspace/hooks.json | 12 + .../snapshots/hook-cc-pretool-ask/input.json | 7 + .../hook-cc-pretool-ask/session.jsonl | 128 +++++ .../hook-cc-pretool-ask/stdout.golden.jsonl | 82 ++++ .../hook-cc-pretool-ask/workspace/hooks.json | 12 + .../snapshots/hook-cc-pretool-deny/input.json | 7 + .../hook-cc-pretool-deny/session.jsonl | 136 ++++++ .../hook-cc-pretool-deny/stdout.golden.jsonl | 90 ++++ .../hook-cc-pretool-deny/workspace/hooks.json | 12 + .../input.json | 0 .../session.jsonl | 0 .../stdout.golden.jsonl | 0 .../workspace/hooks.json | 0 .../hook-cc-promptsubmit-context/input.json | 7 + .../session.jsonl | 60 +++ .../stdout.golden.jsonl | 47 ++ .../workspace/hooks.json | 11 + .../hook-cc-stop-continue/input.json | 7 + .../hook-cc-stop-continue/session.jsonl | 238 +++++++++ .../hook-cc-stop-continue/stdout.golden.jsonl | 214 +++++++++ .../workspace/hooks.json | 11 + .../hook-codex-posttool-block/input.json | 7 + .../hook-codex-posttool-block/session.jsonl | 454 ++++++++++++++++++ .../stdout.golden.jsonl | 297 ++++++++++++ .../workspace/codex-hooks.json | 12 + .../hook-codex-posttool-context/input.json | 7 + .../hook-codex-posttool-context/session.jsonl | 112 +++++ .../stdout.golden.jsonl | 65 +++ .../workspace/codex-hooks.json | 12 + .../hook-codex-pretool-block/input.json | 7 + .../hook-codex-pretool-block/session.jsonl | 109 +++++ .../stdout.golden.jsonl | 62 +++ .../workspace/codex-hooks.json | 12 + .../hook-codex-promptsubmit-block/input.json | 7 + .../session.jsonl | 6 + .../stdout.golden.jsonl | 3 + .../workspace/codex-hooks.json | 11 + .../input.json | 7 + .../session.jsonl | 52 ++ .../stdout.golden.jsonl | 39 ++ .../workspace/codex-hooks.json | 11 + .../hook-codex-stop-continue/input.json | 7 + .../hook-codex-stop-continue/session.jsonl | 247 ++++++++++ .../stdout.golden.jsonl | 223 +++++++++ .../workspace/codex-hooks.json | 11 + 58 files changed, 3860 insertions(+), 6 deletions(-) create mode 100644 docs/rfc/implemented/testing/2026-07-04-hook-snapshot-matrix.md create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-posttool-block/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-posttool-block/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-posttool-block/workspace/hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-posttool-context/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-posttool-context/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-posttool-context/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-posttool-context/workspace/hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/workspace/hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-pretool-deny/workspace/hooks.json rename examples/acp-agent/tests/snapshots/{hook-prompt-block => hook-cc-promptsubmit-block}/input.json (100%) rename examples/acp-agent/tests/snapshots/{hook-prompt-block => hook-cc-promptsubmit-block}/session.jsonl (100%) rename examples/acp-agent/tests/snapshots/{hook-prompt-block => hook-cc-promptsubmit-block}/stdout.golden.jsonl (100%) rename examples/acp-agent/tests/snapshots/{hook-prompt-block => hook-cc-promptsubmit-block}/workspace/hooks.json (100%) create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/workspace/hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-stop-continue/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-stop-continue/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-stop-continue/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-cc-stop-continue/workspace/hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-posttool-block/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-posttool-block/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-posttool-block/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-posttool-block/workspace/codex-hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-posttool-context/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-posttool-context/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-posttool-context/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-posttool-context/workspace/codex-hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-pretool-block/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-pretool-block/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-pretool-block/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-pretool-block/workspace/codex-hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/workspace/codex-hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/workspace/codex-hooks.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-stop-continue/input.json create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-stop-continue/session.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-stop-continue/stdout.golden.jsonl create mode 100644 examples/acp-agent/tests/snapshots/hook-codex-stop-continue/workspace/codex-hooks.json diff --git a/docs/rfc/README.md b/docs/rfc/README.md index bb143ced89..193eacd9b4 100644 --- a/docs/rfc/README.md +++ b/docs/rfc/README.md @@ -155,6 +155,7 @@ Do NOT write one for a mechanical or local choice (a variable name, a one-file r | [Per-session snapshot replay for nested agents](implemented/testing/2026-06-22-subagent-snapshot-replay.md) | 2026-06-22 | | [Persist the seed boundary so fork-child replay routes correctly](implemented/testing/2026-06-22-fork-child-replay-seed-boundary.md) | 2026-06-22 | | [Record fork and mixed spawn+fork snapshot scenarios](implemented/testing/2026-06-22-fork-snapshot-scenarios.md) | 2026-06-22 | +| [Hook snapshot matrix — end-to-end goldens for both bridges](implemented/testing/2026-07-04-hook-snapshot-matrix.md) | 2026-07-04 | ## Rejected diff --git a/docs/rfc/implemented/testing/2026-07-04-hook-snapshot-matrix.md b/docs/rfc/implemented/testing/2026-07-04-hook-snapshot-matrix.md new file mode 100644 index 0000000000..bf4926e86b --- /dev/null +++ b/docs/rfc/implemented/testing/2026-07-04-hook-snapshot-matrix.md @@ -0,0 +1,46 @@ +# RFC: Hook snapshot matrix — end-to-end goldens for both bridges + +Status: implemented + +## Problem + +The hook bridges — [`dsh-hooks-claude`](../../../../packages/hooks/hooks-claude) (7 Claude Code hook points) and [`dsh-hooks-codex`](../../../../packages/hooks/hooks-codex) (5 Codex points) — map external hook commands onto the harness interception seams. They carry deep unit and coverage-spec coverage (every decision arm, every payload dialect, driven against a mocked seam) plus one key-gated e2e (`hooks.e2e.ts`, a live `PreToolUse` block). But the full-transcript snapshot tier — the one net that boots the real `acp-agent` subprocess, replays a recorded session keyless, and diffs the normalized ACP stdout + re-persisted log against committed goldens — covered exactly ONE hook: a Claude `UserPromptSubmit` block (`hook-prompt-block`). + +That is the tier a mocked unit test structurally cannot be: it exercises the REAL bridge translating a REAL hook process's outcome into the REAL seam decision, then the REAL loop's reaction, rendered exactly as an editor sees it. A bridge-translation or loop-structure regression that left every unit green would still escape it for every hook point but one — and for the Codex bridge, the ACP example did not even LOAD it, so no Codex hook could fire end-to-end at all. + +## Decision + +Two coupled changes, in one PR: + +### 1. The ACP example ships BOTH hook bridges + +`examples/acp-agent/cordis.yml` and `cordis.snapshot.yml` now load `dsh-hooks-codex` alongside `dsh-hooks-claude`, each pointed at its own config file (`./hooks.json` for Claude, `./codex-hooks.json` for Codex — the two dialects cannot share one file). This is a genuine product-surface change, not test-only wiring: the shipped ACP server (and the `demo:acp` front door) now carries both bridges. + +It is safe because a bridge whose config file is absent is a **silent no-op**: `apply()` catches the read failure, logs through `ctx.logger`, and registers nothing — zero listeners, zero session events. The `acp-agent` app ships no stdout logger, so the warning cannot reach the ACP JSON-RPC channel. A scenario (or a real project) that wants only Claude hooks ships only `hooks.json`; the Codex bridge sees no `codex-hooks.json` and vanishes. This was verified empirically: with both bridges loaded, all pre-existing snapshots (none of which ship a `codex-hooks.json`) are byte-identical. + +Loading both is the minimum that lets the snapshot tier exercise each dialect against the same real app the product ships. Recording (which boots `cordis.yml`) must load both too, so a recorded Codex scenario captures the transcript with its hook genuinely active — hence the symmetric edit to both configs. + +### 2. A snapshot scenario per hook point × its headline outcome, both dialects + +Thirteen scenarios under `examples/acp-agent/tests/snapshots/`, naming `hook---`: + +- **Authored, no model turn** (keyless, no sidecar — the derived replay script is empty; the `rejected` turn carrying `hook/*` events is compared): `hook-cc-promptsubmit-block`, `hook-codex-promptsubmit-block`. +- **Recorded against the real API, hook active during recording** (the model's reaction to the decision is part of the captured transcript, replayed keyless thereafter): `hook-{cc,codex}-promptsubmit-context` (allow + additionalContext fold), `hook-cc-pretool-deny` / `hook-codex-pretool-block` (deny → `isError` tool result), `hook-cc-pretool-ask` (ask → degrades to deny with the approval-required reason), `hook-{cc,codex}-posttool-block` (block with feedback), `hook-{cc,codex}-posttool-context` (accept + additionalContext), `hook-{cc,codex}-stop-continue` (a blocking Stop hook forces one extra step via steering). + +Each hook command emits only FIXED LITERAL strings (no timestamps/pids/`$RANDOM`/cwd echoes); the snapshot normalizer scrubs the one volatile field a `hook/result` carries (`durationMs`). The `Stop` scenarios self-limit with a marker file (`.stop_fired`) so the force-continue does not loop — the `stop_hook_active` loop-guard is still a bridge `TODO`, so an unconditional Stop hook would force-continue every step. + +### Three hook points are deliberately NOT snapshotted + +Discovered while building the matrix, and documented here because the omission is a decision, not an oversight: + +- **`SessionStart` and `SubagentStart`** inject context through a detached, best-effort `void runPoint(...).then(agent.inject())` with NO turn binding. The resulting `context/message` races the work it precedes (the first model request / the child's first turn) and lands at a nondeterministic log position. A recorded golden does not even reproduce on its own replay — a 10× replay stability check failed 10/10 for both. They stay on the bridges' unit coverage, which drives the seam directly without the timing race. (If the injection is ever made turn-bound and deterministic — the direction the `TODO(session-start-gating)` points — these become snapshottable.) +- **`SubagentStop`** is observe-only: its `subagent/end` handler passes no turn (so no `hook/*` log events) and does no injection. It writes NOTHING to the transcript, so a golden would be byte-identical to the no-hook run and could never be proven to fail — a guard that cannot bite. It stays on unit coverage (`bridge.spec.ts` already asserts the observe-only call). + +The matrix therefore covers every hook point that has a DETERMINISTIC, OBSERVABLE transcript footprint, for both dialects. + +## Consequences + +- Every bridge seam mapping with an observable transcript is now guarded at the full-transcript tier, in the real app, for both dialects — including the Codex bridge, which had no end-to-end coverage at all. Recorded goldens capture the model's real reaction to a denied/blocked/force-continued turn, which a hand-authored transcript could only guess at. +- The block scenarios are keyless (no model turn); the rest replay keyless from recorded fixtures. `pnpm run test:snapshot:record` regenerates the recorded fixtures from the live API and self-skips without a key like every recorded scenario. +- The prove-red discipline holds: tampering a hook config's output (e.g. changing a deny reason) turns its scenario red on replay — the hook process runs FOR REAL during replay (only the model is replayed), so the golden guards the actual hook→seam→loop path, not a mock of it. +- The `acp-agent` demo now loads a Codex bridge it will usually no-op (no `codex-hooks.json` in a typical project), which is the intended fail-soft behavior, not a cost. diff --git a/examples/AGENTS.md b/examples/AGENTS.md index c7219d3a18..488083b438 100644 --- a/examples/AGENTS.md +++ b/examples/AGENTS.md @@ -21,6 +21,6 @@ A keyless smoke that spawns the example from a temp cwd must set `TSX_TSCONFIG_P |---|---|---| | `echo-agent` | `tests/echo.e2e.ts` — boots the real `cordis.yml`, drives the echo tool round-trip and the direct canned reply | **N/A — keyless by nature** (the `mock-echo` model has no real provider) | | `coding-agent` | `tests/keyless-smoke.e2e.ts` — boots the full real tree (dummy key, no prompt → no model call), asserts banner + clean exit | `tests/{full-loop,coding-task,resume,compaction,todo-write}.e2e.ts` — real model + real bash + real todo_write, world-verified | -| `acp-agent` | `pnpm run test:snapshot` — boots the real ACP subprocess and replays a recorded session keyless (incl. `hook-prompt-block`, where a `UserPromptSubmit` hook blocks the prompt); `tests/acp.e2e.ts` also asserts stdout purity without a key | `tests/acp.e2e.ts` — real ACP prompt, verifies a file the agent wrote; `tests/hooks.e2e.ts` — a real `PreToolUse` hook blocks bash, verifies the file is NOT written | +| `acp-agent` | `pnpm run test:snapshot` — boots the real ACP subprocess and replays a recorded session keyless (incl. the hook matrix: a scenario per hook point × outcome for BOTH the Claude and Codex bridges — block, deny, ask, context-fold, force-continue); `tests/acp.e2e.ts` also asserts stdout purity without a key | `tests/acp.e2e.ts` — real ACP prompt, verifies a file the agent wrote; `tests/hooks.e2e.ts` — a real `PreToolUse` hook blocks bash, verifies the file is NOT written | See [the root AGENTS.md](../AGENTS.md) for repo-wide conventions and [docs/architecture.md](../docs/architecture.md) for the design. diff --git a/examples/acp-agent/cordis.snapshot.yml b/examples/acp-agent/cordis.snapshot.yml index aa65e540b4..a6a2b1f900 100644 --- a/examples/acp-agent/cordis.snapshot.yml +++ b/examples/acp-agent/cordis.snapshot.yml @@ -98,3 +98,14 @@ name: '@deepseek-ai/dsh-hooks-claude' config: configPath: ./hooks.json + +# The Codex hook bridge, loaded alongside the Claude one (symmetric with +# cordis.yml so a recorded Codex scenario fires the hook during recording too). It +# reads its OWN file `./codex-hooks.json` (Codex's dialect) — the two bridges +# cannot share one config. Same fails-soft-when-absent contract: a scenario that +# ships `workspace/codex-hooks.json` exercises the Codex path end-to-end; a +# scenario without one registers nothing (a silent no-op, never reaching stdout). +- id: hooks-codex + name: '@deepseek-ai/dsh-hooks-codex' + config: + configPath: ./codex-hooks.json diff --git a/examples/acp-agent/cordis.yml b/examples/acp-agent/cordis.yml index 8ade4ce847..ecf0cef38a 100644 --- a/examples/acp-agent/cordis.yml +++ b/examples/acp-agent/cordis.yml @@ -110,3 +110,15 @@ name: '@deepseek-ai/dsh-hooks-claude' config: configPath: ./hooks.json + +# The Codex hook bridge, loaded alongside the Claude one. It reads its OWN config +# file (`./codex-hooks.json`, Codex's snake_case five-event dialect) — the two +# bridges cannot share one file, so each owns a distinct path. Same process-level +# read-once semantics and same fails-soft-when-absent contract: a launch cwd with +# no `codex-hooks.json` registers nothing (a silent no-op through ctx.logger, never +# stdout). The example ships both bridges so a scenario can exercise EITHER dialect +# end-to-end by seeding the matching file in its workspace/. +- id: hooks-codex + name: '@deepseek-ai/dsh-hooks-codex' + config: + configPath: ./codex-hooks.json diff --git a/examples/acp-agent/tests/acp.snapshot.ts b/examples/acp-agent/tests/acp.snapshot.ts index b59b454a51..23dffa268b 100644 --- a/examples/acp-agent/tests/acp.snapshot.ts +++ b/examples/acp-agent/tests/acp.snapshot.ts @@ -71,11 +71,42 @@ const SCENARIOS: Scenario[] = [ { name: 'subagent-multi', hasModelTurn: true, recorded: true, childSessions: 2 }, { name: 'subagent-fork', hasModelTurn: true, recorded: true, childSessions: 1 }, { name: 'subagent-mixed', hasModelTurn: true, recorded: true, childSessions: 2 }, - // A UserPromptSubmit hook blocks the prompt before any step runs: no model - // call (keyless, authored — its derived script is empty so it needs no - // sidecar), but it persists a `rejected` turn carrying `hook/*` events, so its - // log IS compared. The hooks.json riding in workspace/ drives the bridge. - { name: 'hook-prompt-block', hasModelTurn: false, comparesLog: true, recorded: false }, + // Hook matrix — one scenario per hook point × its headline Decision outcome, + // across BOTH bridges (Claude `hooks.json`, Codex `codex-hooks.json`, seeded in + // workspace/). The block scenarios need no model call: a UserPromptSubmit hook + // blocks the prompt before any step runs (keyless, authored — the derived + // script is empty so no sidecar), yet persists a `rejected` turn carrying + // `hook/*` events, so their logs ARE compared. Every other point fires a real + // seam mid-turn, so its transcript is recorded WITH the hook active. + { name: 'hook-cc-promptsubmit-block', hasModelTurn: false, comparesLog: true, recorded: false }, + { name: 'hook-codex-promptsubmit-block', hasModelTurn: false, comparesLog: true, recorded: false }, + // The mid-turn seams fire during a real model turn, so each is recorded WITH + // its hook active (the model's reaction to a deny/block/force-continue is part + // of the captured transcript). The Codex bridge exercises the same seams in its + // own snake_case dialect. + // + // Two hook points are deliberately NOT snapshotted, and stay on the bridges' + // unit coverage (`bridge.spec.ts` / `coverage.spec.ts`) instead: + // - SessionStart and SubagentStart inject context through a detached, + // best-effort `void runPoint(...).then(agent.inject())` with no turn + // binding, so the resulting `context/message` races the work it precedes + // and lands at a nondeterministic log position — a recorded golden does not + // even reproduce on its own replay. + // - SubagentStop is observe-only with no turn and no injection, so it writes + // NOTHING to the transcript — a golden would be byte-identical to the + // no-hook run and could never be proven to fail. + // See the hook-snapshot-matrix RFC for the full rationale. + { name: 'hook-cc-promptsubmit-context', hasModelTurn: true, recorded: true }, + { name: 'hook-cc-pretool-deny', hasModelTurn: true, recorded: true }, + { name: 'hook-cc-pretool-ask', hasModelTurn: true, recorded: true }, + { name: 'hook-cc-posttool-block', hasModelTurn: true, recorded: true }, + { name: 'hook-cc-posttool-context', hasModelTurn: true, recorded: true }, + { name: 'hook-cc-stop-continue', hasModelTurn: true, recorded: true }, + { name: 'hook-codex-promptsubmit-context', hasModelTurn: true, recorded: true }, + { name: 'hook-codex-pretool-block', hasModelTurn: true, recorded: true }, + { name: 'hook-codex-posttool-block', hasModelTurn: true, recorded: true }, + { name: 'hook-codex-posttool-context', hasModelTurn: true, recorded: true }, + { name: 'hook-codex-stop-continue', hasModelTurn: true, recorded: true }, ] /** The sibling child-fixture paths for a scenario (`session.1.jsonl` …). */ diff --git a/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/input.json b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/input.json new file mode 100644 index 0000000000..3d44990f9b --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/input.json @@ -0,0 +1,7 @@ +{ + "steps": [ + { "op": "initialize" }, + { "op": "newSession" }, + { "op": "prompt", "text": "Use the bash tool to run exactly: echo HELLO. Report the tool result you got back verbatim, then stop." } + ] +} diff --git a/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl new file mode 100644 index 0000000000..a9bcac1b03 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-block/session.jsonl @@ -0,0 +1,400 @@ +{"type":"session","version":0,"id":"5d77f7c5-7470-49f8-8c22-cd61d318b994","createdAt":1783095158367,"cwd":"/tmp/acp-snap-cwd-q62GvW"} +{"type":"turn/start","seq":0,"time":1783095158371,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}} +{"type":"user/message","seq":1,"time":1783095158372,"data":{"content":[{"type":"text","text":"Use the bash tool to run exactly: echo HELLO. 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a/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/workspace/hooks.json b/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/workspace/hooks.json new file mode 100644 index 0000000000..ef832fc97a --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-cc-posttool-context/workspace/hooks.json @@ -0,0 +1,12 @@ +{ + "hooks": { + "PostToolUse": [ + { + "matcher": "bash", + "hooks": [ + { "type": "command", "command": "echo '{\"hookSpecificOutput\":{\"hookEventName\":\"PostToolUse\",\"additionalContext\":\"Note: command output has been verified against the audit log.\"}}'" } + ] + } + ] + } +} diff --git a/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/input.json b/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/input.json new file mode 100644 index 0000000000..3d44990f9b --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/input.json @@ -0,0 +1,7 @@ +{ + "steps": [ + { "op": "initialize" }, + { "op": "newSession" }, + { "op": 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examples/acp-agent/tests/snapshots/hook-prompt-block/input.json rename to examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/input.json diff --git a/examples/acp-agent/tests/snapshots/hook-prompt-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/session.jsonl similarity index 100% rename from examples/acp-agent/tests/snapshots/hook-prompt-block/session.jsonl rename to examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/session.jsonl diff --git a/examples/acp-agent/tests/snapshots/hook-prompt-block/stdout.golden.jsonl b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/stdout.golden.jsonl similarity index 100% rename from examples/acp-agent/tests/snapshots/hook-prompt-block/stdout.golden.jsonl rename to examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-block/stdout.golden.jsonl diff --git a/examples/acp-agent/tests/snapshots/hook-prompt-block/workspace/hooks.json 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a/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/workspace/hooks.json b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/workspace/hooks.json new file mode 100644 index 0000000000..0856516f73 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-cc-promptsubmit-context/workspace/hooks.json @@ -0,0 +1,11 @@ +{ + "hooks": { + "UserPromptSubmit": [ + { + "hooks": [ + { "type": "command", "command": "echo '{\"hookSpecificOutput\":{\"hookEventName\":\"UserPromptSubmit\",\"additionalContext\":\"The user has previously stated their favorite color is teal.\"}}'" } + ] + } + ] + } +} diff --git a/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/input.json b/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/input.json new file mode 100644 index 0000000000..7debde08eb --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-cc-stop-continue/input.json @@ -0,0 +1,7 @@ +{ + "steps": [ + { "op": "initialize" }, + { "op": "newSession" }, + { 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.stop_fired ]; then exit 0; else touch .stop_fired; echo 'Also reply with the single word SECOND, then stop.' >&2; exit 2; fi" } + ] + } + ] + } +} diff --git a/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/input.json b/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/input.json new file mode 100644 index 0000000000..3d44990f9b --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-codex-posttool-block/input.json @@ -0,0 +1,7 @@ +{ + "steps": [ + { "op": "initialize" }, + { "op": "newSession" }, + { "op": "prompt", "text": "Use the bash tool to run exactly: echo HELLO. 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a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/input.json b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/input.json new file mode 100644 index 0000000000..1995199566 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/input.json @@ -0,0 +1,7 @@ +{ + "steps": [ + { "op": "initialize" }, + { "op": "newSession" }, + { "op": "prompt", "text": "Delete everything in the repo." } + ] +} diff --git a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/session.jsonl new file mode 100644 index 0000000000..bc9144f980 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-block/session.jsonl @@ -0,0 +1,6 @@ +{"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}"} +{"type":"turn/start","seq":0,"time":0,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}} 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} + ] + } + ] + } +} diff --git a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/input.json b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/input.json new file mode 100644 index 0000000000..348d8960d4 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/input.json @@ -0,0 +1,7 @@ +{ + "steps": [ + { "op": "initialize" }, + { "op": "newSession" }, + { "op": "prompt", "text": "What is my favorite color? Reply with just the color and stop. Do not use any tools." } + ] +} diff --git a/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl new file mode 100644 index 0000000000..2e37a148e9 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-codex-promptsubmit-context/session.jsonl @@ -0,0 +1,52 @@ +{"type":"session","version":0,"id":"09a657ad-72c0-4fd3-aae1-00b66dfdb3d5","createdAt":1783095399158,"cwd":"/tmp/acp-snap-cwd-rBmbYp"} +{"type":"turn/start","seq":0,"time":1783095399163,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}} +{"type":"hook/invoked","seq":1,"time":1783095399164,"data":{"turn":1,"point":"UserPromptSubmit","dialect":"codex","handlerId":"codex:UserPromptSubmit:1"}} +{"type":"hook/result","seq":2,"time":1783095399180,"data":{"turn":1,"point":"UserPromptSubmit","handlerId":"codex:UserPromptSubmit:1","decision":"pass","exitCode":0,"durationMs":15.786223999999947}} +{"type":"user/message","seq":3,"time":1783095399180,"data":{"content":[{"type":"text","text":"What is my favorite color? 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+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"SEC"}}}} +{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"OND"}}}} +{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}} diff --git a/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/workspace/codex-hooks.json b/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/workspace/codex-hooks.json new file mode 100644 index 0000000000..86ebf2ce39 --- /dev/null +++ b/examples/acp-agent/tests/snapshots/hook-codex-stop-continue/workspace/codex-hooks.json @@ -0,0 +1,11 @@ +{ + "hooks": { + "Stop": [ + { + "hooks": [ + { "type": "command", "command": "if [ -f .stop_fired ]; then exit 0; else touch .stop_fired; echo 'Also reply with the single word SECOND, then stop.' >&2; exit 2; fi" } + ] + } + ] + } +}