Merge remote-tracking branch 'origin/master' into codex/enforce-tool-cancellation

# Conflicts: # docs/event-producer-consumer.md # examples/acp-agent/tests/snapshots/bash-spill/session.jsonl # examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl # examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl # examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl # examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl # packages/context/workspace-context/tests/workspace-context.spec.ts # packages/core/agent/src/index.ts # packages/support/invariants/tests/invariants.spec.ts # packages/ui/acp/src/index.ts # packages/ui/tui/tests/harness.ts # packages/ui/tui/tests/tui.spec.ts
2026-07-21 20:03:00 +08:00
parent 2e7caee96a 1565f087cb
commit 0004b8675f
623 changed files with 21217 additions and 3024 deletions
--- a/packages/hooks/hook-protocol/package.json
+++ b/packages/hooks/hook-protocol/package.json
@@ -11,11 +11,16 @@
      "types": "./lib/types/index.d.ts",
      "default": "./lib/index.js"
    },
+    "./invariant": {
+      "types": "./lib/types/invariant.d.ts",
+      "default": "./lib/invariant.js"
+    },
    "./src/*": "./src/*",
    "./package.json": "./package.json"
  },
  "files": [
    "lib/index.js",
+    "lib/invariant.js",
    "lib/types/**/*.d.ts",
    "lib/types/**/*.d.ts.map",
    "src"
@@ -23,11 +28,13 @@
  "license": "BSD-3-Clause",
  "peerDependencies": {
    "@deepseek-ai/dsh-bash": "^0.0.1",
+    "@deepseek-ai/dsh-invariants": "^0.0.1",
    "@deepseek-ai/dsh-session": "^0.0.1",
    "cordis": "^4.0.0-rc.7"
  },
  "devDependencies": {
    "@deepseek-ai/dsh-bash": "workspace:^",
+    "@deepseek-ai/dsh-invariants": "workspace:^",
    "@deepseek-ai/dsh-session": "workspace:^",
    "cordis": "^4.0.0-rc.7"
  }
--- a/packages/hooks/hook-protocol/src/invariant.ts
+++ b/packages/hooks/hook-protocol/src/invariant.ts
@@ -0,0 +1,101 @@
+/** Package-owned hook provenance-stream invariants. @module @deepseek-ai/dsh-hook-protocol/invariant */
+
+import type { Context } from 'cordis'
+import type { Session, SessionEvent } from '@deepseek-ai/dsh-session'
+import type { InvariantFailure, InvariantInstaller } from '@deepseek-ai/dsh-invariants'
+import type {} from './types.ts'
+
+const PACKAGE_NAME = '@deepseek-ai/dsh-hook-protocol'
+
+/** Cordis companion plugin name. */
+export const name = 'hook-protocol-invariant'
+/** Service required before the companion can reserve package ownership. */
+export const inject = ['invariants']
+
+interface HookTransition {
+  key: string
+  delta: 1 | -1
+}
+
+/** Correlation key shared by an invoked/result pair. */
+function hookKey(data: { turn: number; point: string; handlerId: string }): string {
+  return `${data.turn}\0${data.point}\0${data.handlerId}`
+}
+
+/** Validate one hook event against committed pending invocations. */
+function validateHookEvent(
+  pending: ReadonlyMap<string, number>,
+  event: SessionEvent,
+  fail: InvariantFailure,
+): HookTransition | undefined {
+  if (event.type === 'hook/invoked') {
+    if (event.data.point.length === 0 || event.data.handlerId.length === 0) {
+      fail('hook/invoked point and handlerId must be non-empty')
+    }
+    const dialect: string = event.data.dialect
+    if (dialect !== 'claude' && dialect !== 'codex') {
+      fail(`hook/invoked carries unknown dialect ${JSON.stringify(dialect)}`)
+    }
+    return { key: hookKey(event.data), delta: 1 }
+  }
+  if (event.type !== 'hook/result') return undefined
+  const key = hookKey(event.data)
+  if ((pending.get(key) ?? 0) === 0) {
+    fail(`hook/result has no matching hook/invoked for ${JSON.stringify(event.data.handlerId)}`)
+  }
+  if (!Number.isFinite(event.data.durationMs) || event.data.durationMs < 0) {
+    fail('hook/result durationMs must be a non-negative finite number')
+  }
+  return { key, delta: -1 }
+}
+
+/** Apply one committed hook-pair transition. */
+function applyHookTransition(pending: Map<string, number>, transition: HookTransition): void {
+  const next = (pending.get(transition.key) ?? 0) + transition.delta
+  if (next === 0) pending.delete(transition.key)
+  else pending.set(transition.key, next)
+}
+
+/** Install hook invoked/result pairing checks. */
+// Event owners keep precommit staging local so their vocabularies never move into a central helper.
+/* jscpd:ignore-start */
+const install: InvariantInstaller = Object.assign((ctx: Context, fail: InvariantFailure) => {
+  const traces = new WeakMap<Session, Map<string, number>>()
+  const staged = new WeakMap<SessionEvent, { session: Session; transition: HookTransition }>()
+  const seed = (session: Session): Map<string, number> => {
+    const pending = new Map<string, number>()
+    traces.set(session, pending)
+    for (const event of session.events) {
+      const transition = validateHookEvent(pending, event, fail)
+      if (transition !== undefined) applyHookTransition(pending, transition)
+    }
+    return pending
+  }
+  const traceFor = (session: Session): Map<string, number> => traces.get(session) ?? seed(session)
+
+  for (const session of ctx.sessions.list()) seed(session)
+  ctx.on('session/created', (session) => { seed(session) }, { global: true })
+  ctx.on('session/event', (session, event) => {
+    if (event.type !== 'hook/invoked' && event.type !== 'hook/result') return
+    const candidate = staged.get(event)
+    /* v8 ignore next -- internal/dispatch stages every hook provenance event */
+    if (candidate === undefined || candidate.session !== session) return fail('hook event published without pre-commit validation')
+    staged.delete(event)
+    applyHookTransition(traceFor(session), candidate.transition)
+  }, { global: true })
+  ctx.on('internal/dispatch', (_mode, eventName, args) => {
+    if (eventName !== 'session/event') return
+    const [session, event] = args as [Session, SessionEvent]
+    const transition = validateHookEvent(traceFor(session), event, fail)
+    if (transition !== undefined) staged.set(event, { session, transition })
+  }, { global: true })
+}, { inject: ['sessions'] })
+/* jscpd:ignore-end */
+
+/**
+ * Register the hook-protocol invariant companion.
+ * @param ctx - Cordis context carrying the invariant service.
+ * @returns the installed registration's disposer after setup succeeds.
+ */
+export const apply = (ctx: Context): Promise<() => void> =>
+  Promise.resolve(ctx.invariants.register(PACKAGE_NAME, install))
--- a/packages/hooks/hook-protocol/tests/invariant.spec.ts
+++ b/packages/hooks/hook-protocol/tests/invariant.spec.ts
@@ -0,0 +1,86 @@
+import { describe, expect, it } from 'vitest'
+import { Context } from 'cordis'
+import SessionStore, { Session, SessionId } from '@deepseek-ai/dsh-session'
+import * as HookInvariant from '@deepseek-ai/dsh-hook-protocol/invariant'
+import InvariantService from '@deepseek-ai/dsh-invariants'
+
+async function setup(): Promise<Context> {
+  const ctx = new Context()
+  await ctx.plugin(SessionStore)
+  await ctx.plugin(InvariantService)
+  await ctx.plugin(HookInvariant)
+  return ctx
+}
+
+const invoked = (overrides: Record<string, unknown> = {}) => ({
+  turn: 1,
+  point: 'PreToolUse',
+  dialect: 'claude' as const,
+  handlerId: 'hook-1',
+  ...overrides,
+})
+
+const result = (overrides: Record<string, unknown> = {}) => ({
+  turn: 1,
+  point: 'PreToolUse',
+  handlerId: 'hook-1',
+  decision: 'pass',
+  durationMs: 3,
+  ...overrides,
+})
+
+describe('hook-protocol invariants', () => {
+  it('pairs serial and repeated handler invocations', async () => {
+    const ctx = await setup()
+    const session = ctx.sessions.create()
+    session.append('hook/invoked', invoked())
+    session.append('hook/invoked', invoked())
+    session.append('hook/result', result())
+    session.append('hook/result', result())
+  })
+
+  it('rebuilds pending hook provenance from an existing session', async () => {
+    const ctx = new Context()
+    await ctx.plugin(SessionStore)
+    const session = ctx.sessions.create()
+    session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
+    session.append('hook/invoked', invoked())
+    await ctx.plugin(InvariantService)
+    await ctx.plugin(HookInvariant)
+    expect(() => session.append('hook/result', result())).not.toThrow()
+    session.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
+  })
+
+  it('adopts a bare session first observed through publication', async () => {
+    const ctx = await setup()
+    const session = new Session(SessionId('bare-hook-session'))
+    expect(() => {
+      ctx.emit('session/event', session, {
+        type: 'hook/invoked', seq: 0, time: 0, data: invoked(),
+      })
+      ctx.emit('session/event', session, {
+        type: 'hook/result', seq: 1, time: 1, data: result(),
+      })
+    }).not.toThrow()
+  })
+
+  it.each([
+    [invoked({ point: '' }), /point and handlerId must be non-empty/],
+    [invoked({ handlerId: '' }), /point and handlerId must be non-empty/],
+    [invoked({ dialect: 'other' }), /unknown dialect/],
+  ])('rejects malformed hook invocation %#', async (data, message) => {
+    const ctx = await setup()
+    expect(() => ctx.sessions.create().append('hook/invoked', data as never)).toThrow(message)
+  })
+
+  it('rejects unmatched and malformed results', async () => {
+    const ctx = await setup()
+    const session = ctx.sessions.create()
+    expect(() => session.append('hook/result', result())).toThrow(/no matching hook\/invoked/)
+    session.append('hook/invoked', invoked())
+    expect(() => session.append('hook/result', result({ durationMs: -1 })))
+      .toThrow(/durationMs must be a non-negative finite number/)
+    expect(() => session.append('hook/result', result({ point: 'Stop' })))
+      .toThrow(/no matching hook\/invoked/)
+  })
+})
--- a/packages/hooks/hook-protocol/tsconfig.json
+++ b/packages/hooks/hook-protocol/tsconfig.json
@@ -19,6 +19,9 @@
    },
    {
      "path": "../../core/session"
+    },
+    {
+      "path": "../../support/invariants"
    }
  ]
 }
--- a/packages/hooks/hooks-claude/package.json
+++ b/packages/hooks/hooks-claude/package.json
@@ -11,11 +11,16 @@
      "types": "./lib/types/index.d.ts",
      "default": "./lib/index.js"
    },
+    "./invariant": {
+      "types": "./lib/types/invariant.d.ts",
+      "default": "./lib/invariant.js"
+    },
    "./src/*": "./src/*",
    "./package.json": "./package.json"
  },
  "files": [
    "lib/index.js",
+    "lib/invariant.js",
    "lib/types/**/*.d.ts",
    "lib/types/**/*.d.ts.map",
    "src"
@@ -27,6 +32,7 @@
  "peerDependencies": {
    "@deepseek-ai/dsh-agent": "^0.0.1",
    "@deepseek-ai/dsh-hook-protocol": "^0.0.1",
+    "@deepseek-ai/dsh-invariants": "^0.0.1",
    "@deepseek-ai/dsh-llm": "^0.0.1",
    "@deepseek-ai/dsh-session": "^0.0.1",
    "@deepseek-ai/dsh-session-persistence": "^0.0.1",
@@ -41,6 +47,7 @@
    "@deepseek-ai/dsh-bash": "workspace:^",
    "@deepseek-ai/dsh-bash-local": "workspace:^",
    "@deepseek-ai/dsh-hook-protocol": "workspace:^",
+    "@deepseek-ai/dsh-invariants": "workspace:^",
    "@deepseek-ai/dsh-llm": "workspace:^",
    "@deepseek-ai/dsh-session": "workspace:^",
    "@deepseek-ai/dsh-session-persistence": "workspace:^",
--- a/packages/hooks/hooks-claude/src/invariant.ts
+++ b/packages/hooks/hooks-claude/src/invariant.ts
@@ -0,0 +1,30 @@
+/**
+ * Package-owned invariant companion for `@deepseek-ai/dsh-hooks-claude`.
+ * @module @deepseek-ai/dsh-hooks-claude/invariant
+ */
+
+/* jscpd:ignore-start */
+import type { Context } from 'cordis'
+import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
+
+const PACKAGE_NAME = '@deepseek-ai/dsh-hooks-claude'
+
+/** Cordis companion plugin name. */
+export const name = 'hooks-claude-invariant'
+/** Service required before the companion can reserve package ownership. */
+export const inject = ['invariants']
+
+/**
+ * No runtime invariant: this bridge publishes hook-protocol session events, whose companion owns
+ * their cross-event provenance relation.
+ */
+const install: InvariantInstaller = () => {}
+
+/**
+ * Register this package's invariant companion.
+ * @param ctx - Cordis context carrying the invariant service.
+ * @returns the installed registration's disposer after setup succeeds.
+ */
+export const apply = (ctx: Context): Promise<() => void> =>
+  Promise.resolve(ctx.invariants.register(PACKAGE_NAME, install))
+/* jscpd:ignore-end */
--- a/packages/hooks/hooks-claude/tests/bridge.spec.ts
+++ b/packages/hooks/hooks-claude/tests/bridge.spec.ts
@@ -10,7 +10,8 @@ import type { Agent } from '@deepseek-ai/dsh-agent'
 import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import { mountAgentLoopTestDependencies } from '@deepseek-ai/dsh-agent-loop-testkit'
 import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
-import { SubagentRunId } from '@deepseek-ai/dsh-subagent'
+import { scopeTarget } from '@deepseek-ai/dsh-scope'
+import SubagentService, { SubagentRunId } from '@deepseek-ai/dsh-subagent'
 import * as HooksClaude from '@deepseek-ai/dsh-hooks-claude'
 import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts'

@@ -25,6 +26,10 @@ import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent
 const dirs: string[] = []
 afterEach(() => { for (const d of dirs.splice(0)) rmSync(d, { recursive: true, force: true }) })

+function subagentCarrier(ctx: Context) {
+  return scopeTarget(ctx as unknown as SubagentService, undefined)
+}
+
 /** Write a hooks.json + named executable scripts into a fresh temp dir. */
 function writeConfig(hooks: unknown, scripts: Record<string, string> = {}): string {
  const dir = mkdtempSync(join(tmpdir(), 'dsh-hooks-claude-'))
@@ -290,8 +295,8 @@ describe('hooks-claude bridge — SubagentStart / SubagentStop (observe)', () =>
    // Drive the observe-only lifecycle events directly (no real child needed — the
    // bridge just listens). No child agent is registered, so SubagentStart's
    // child lookup yields undefined and it simply runs the hook.
-    ctx.emit('subagent/start', { runId: SubagentRunId('run-1'), provider: 'inproc', id: SessionId('child-1'), local: false })
-    ctx.emit('subagent/end', { runId: SubagentRunId('run-1'), provider: 'inproc', id: SessionId('child-1'), local: false, stopReason: 'completed', lastAssistantMessage: [{ type: 'text', text: 'done' }] })
+    ctx.emit(subagentCarrier(ctx), 'subagent/start', { runId: SubagentRunId('run-1'), provider: 'inproc', id: SessionId('child-1'), local: false })
+    ctx.emit(subagentCarrier(ctx), 'subagent/end', { runId: SubagentRunId('run-1'), provider: 'inproc', id: SessionId('child-1'), local: false, 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.
@@ -326,7 +331,7 @@ describe('hooks-claude bridge — SubagentStart / SubagentStop (observe)', () =>
    const { ctx, hooks } = await harnessWithFiber(dir, new MockAdapter([]))
    const warn = vi.fn()
    ctx.logger.warn = warn as never
-    ctx.emit('subagent/start', { runId: SubagentRunId('run-1'), provider: 'inproc', id: SessionId('child-1'), local: false })
+    ctx.emit(subagentCarrier(ctx), 'subagent/start', { runId: SubagentRunId('run-1'), provider: 'inproc', id: SessionId('child-1'), local: false })
    await waitFor(() => existsSync(marker))
    const pid = Number(readFileSync(pidFile, 'utf8').trim())
    await hooks.dispose()
--- a/packages/hooks/hooks-claude/tests/coverage-cases.ts
+++ b/packages/hooks/hooks-claude/tests/coverage-cases.ts
@@ -10,7 +10,8 @@ import type { Agent } from '@deepseek-ai/dsh-agent'
 import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import { mountAgentLoopTestDependencies } from '@deepseek-ai/dsh-agent-loop-testkit'
 import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
-import { SubagentRunId } from '@deepseek-ai/dsh-subagent'
+import { scopeTarget } from '@deepseek-ai/dsh-scope'
+import SubagentService, { SubagentRunId } from '@deepseek-ai/dsh-subagent'
 import * as HooksClaude from '@deepseek-ai/dsh-hooks-claude'
 import { MockAdapter, textResponse, toolCallResponse } from '../../../core/agent-loop/tests/mock-adapter.ts'

@@ -22,6 +23,10 @@ const testToolSignal = new AbortController().signal
 const dirs: string[] = []
 afterEach(() => { for (const d of dirs.splice(0)) rmSync(d, { recursive: true, force: true }) })

+function subagentCarrier(ctx: Context) {
+  return scopeTarget(ctx as unknown as SubagentService, undefined)
+}
+
 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
@@ -235,7 +240,7 @@ export function defineCoverageCases(group: CoverageGroup): void {
      const injected: string[] = []
      const child = { id: SessionId('child-x'), inject: (content: { type: string; text?: string }[]) => { injected.push(content.map(b => b.text ?? '').join('')) }, session: { id: SessionId('child-x'), header: { id: 'child-x' } } } as unknown as Parameters<typeof ctx.agents.register>[0]
      ctx.agents.register(child)
-      ctx.emit('subagent/start', { runId: SubagentRunId('run-x'), provider: 'p', id: SessionId('child-x'), local: true })
+      ctx.emit(subagentCarrier(ctx), 'subagent/start', { runId: SubagentRunId('run-x'), provider: 'p', id: SessionId('child-x'), local: true })
      await waitFor(() => injected.includes('child guidance'))
      expect(injected).toContain('child guidance')
    })
@@ -251,7 +256,7 @@ export function defineCoverageCases(group: CoverageGroup): void {
      const warn = vi.fn(); ctx.logger.warn = warn as never
      const child = { id: SessionId('child-y'), inject: () => { throw new Error('inject boom') }, session: { id: SessionId('child-y'), header: { id: 'child-y' } } } as unknown as Parameters<typeof ctx.agents.register>[0]
      ctx.agents.register(child)
-      ctx.emit('subagent/start', { runId: SubagentRunId('run-y'), provider: 'p', id: SessionId('child-y'), local: true })
+      ctx.emit(subagentCarrier(ctx), 'subagent/start', { runId: SubagentRunId('run-y'), provider: 'p', id: SessionId('child-y'), local: true })
      await waitFor(() => warn.mock.calls.some(c => String(c[0]).includes('SubagentStart hook failed')))
      expect(warn).toHaveBeenCalledWith(expect.stringContaining('SubagentStart hook failed'))
    })
@@ -295,7 +300,7 @@ export function defineCoverageCases(group: CoverageGroup): void {
      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', { runId: SubagentRunId('run-z'), provider: 'p', id: SessionId('child-z'), local: false, stopReason: 'completed' })
+      ctx.emit(subagentCarrier(ctx), 'subagent/end', { runId: SubagentRunId('run-z'), provider: 'p', id: SessionId('child-z'), local: false, stopReason: 'completed' })
      await waitFor(() => existsSync(marker))
      expect(existsSync(marker)).toBe(true)
    })
@@ -691,7 +696,7 @@ export function defineCoverageCases(group: CoverageGroup): void {
      // 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 = await ctx.agents.create({ sessionId: SessionId('child-stop-session'), meta: { cwd: childDir }, agentOptions: { provider: 'mock', model: 'mock' } })
-      ctx.emit('subagent/end', { runId: SubagentRunId('run-stop'), provider: 'inproc', id: childHandle.agent.id, local: true, stopReason: 'completed' })
+      ctx.emit(subagentCarrier(ctx), 'subagent/end', { runId: SubagentRunId('run-stop'), provider: 'inproc', id: childHandle.agent.id, local: true, stopReason: 'completed' })

      await waitFor(() => existsSync(marker))
      expect(existsSync(marker)).toBe(true) // the marker landed in the CHILD dir
--- a/packages/hooks/hooks-claude/tsconfig.json
+++ b/packages/hooks/hooks-claude/tsconfig.json
@@ -40,6 +40,9 @@
    },
    {
      "path": "../../bash/bash"
+    },
+    {
+      "path": "../../support/invariants"
    }
  ]
 }
--- a/packages/hooks/hooks-codex/package.json
+++ b/packages/hooks/hooks-codex/package.json
@@ -11,11 +11,16 @@
      "types": "./lib/types/index.d.ts",
      "default": "./lib/index.js"
    },
+    "./invariant": {
+      "types": "./lib/types/invariant.d.ts",
+      "default": "./lib/invariant.js"
+    },
    "./src/*": "./src/*",
    "./package.json": "./package.json"
  },
  "files": [
    "lib/index.js",
+    "lib/invariant.js",
    "lib/types/**/*.d.ts",
    "lib/types/**/*.d.ts.map",
    "src"
@@ -27,6 +32,7 @@
  "peerDependencies": {
    "@deepseek-ai/dsh-agent": "^0.0.1",
    "@deepseek-ai/dsh-hook-protocol": "^0.0.1",
+    "@deepseek-ai/dsh-invariants": "^0.0.1",
    "@deepseek-ai/dsh-llm": "^0.0.1",
    "@deepseek-ai/dsh-session": "^0.0.1",
    "@deepseek-ai/dsh-session-persistence": "^0.0.1",
@@ -40,6 +46,7 @@
    "@deepseek-ai/dsh-bash": "workspace:^",
    "@deepseek-ai/dsh-bash-local": "workspace:^",
    "@deepseek-ai/dsh-hook-protocol": "workspace:^",
+    "@deepseek-ai/dsh-invariants": "workspace:^",
    "@deepseek-ai/dsh-llm": "workspace:^",
    "@deepseek-ai/dsh-session": "workspace:^",
    "@deepseek-ai/dsh-session-persistence": "workspace:^",
--- a/packages/hooks/hooks-codex/src/invariant.ts
+++ b/packages/hooks/hooks-codex/src/invariant.ts
@@ -0,0 +1,30 @@
+/**
+ * Package-owned invariant companion for `@deepseek-ai/dsh-hooks-codex`.
+ * @module @deepseek-ai/dsh-hooks-codex/invariant
+ */
+
+/* jscpd:ignore-start */
+import type { Context } from 'cordis'
+import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
+
+const PACKAGE_NAME = '@deepseek-ai/dsh-hooks-codex'
+
+/** Cordis companion plugin name. */
+export const name = 'hooks-codex-invariant'
+/** Service required before the companion can reserve package ownership. */
+export const inject = ['invariants']
+
+/**
+ * No runtime invariant: this bridge publishes hook-protocol session events, whose companion owns
+ * their cross-event provenance relation.
+ */
+const install: InvariantInstaller = () => {}
+
+/**
+ * Register this package's invariant companion.
+ * @param ctx - Cordis context carrying the invariant service.
+ * @returns the installed registration's disposer after setup succeeds.
+ */
+export const apply = (ctx: Context): Promise<() => void> =>
+  Promise.resolve(ctx.invariants.register(PACKAGE_NAME, install))
+/* jscpd:ignore-end */
--- a/packages/hooks/hooks-codex/tsconfig.json
+++ b/packages/hooks/hooks-codex/tsconfig.json
@@ -37,6 +37,9 @@
    },
    {
      "path": "../../bash/bash"
+    },
+    {
+      "path": "../../support/invariants"
    }
  ]
 }