# Conflicts: # .agents/notes/implemented/feature/2026-06-14-acp-agent-client-protocol.md # .agents/notes/implemented/feature/2026-06-14-acp-agent-client-protocol.zh.md # .agents/notes/implemented/feature/2026-06-30-hook-bridges.i18n.yaml # .agents/notes/implemented/feature/2026-06-30-interception-seams.i18n.yaml # .agents/notes/implemented/feature/2026-07-06-sandbox.i18n.yaml # .agents/notes/implemented/feature/2026-07-06-sandbox.md # .agents/notes/implemented/feature/2026-07-06-sandbox.zh.md # .agents/notes/implemented/feature/2026-07-19-model-facing-goal-tools.i18n.yaml # .agents/notes/implemented/feature/2026-07-19-same-session-goal-round-driver.i18n.yaml # .agents/notes/implemented/feature/2026-07-25-workspace-ui-product-flow.i18n.yaml # .agents/notes/implemented/simplification/2026-07-02-remove-stream-chunk-mirror.i18n.yaml # docs/architecture.i18n.yaml # docs/cookbook/adding-a-tool.i18n.yaml # docs/cookbook/extension-cookbook.i18n.yaml # docs/core-data-structures/llm-streaming.i18n.yaml # docs/core-data-structures/session.i18n.yaml # docs/core-data-structures/tools.i18n.yaml # docs/event-producer-consumer.md # docs/persistence-catalog.md # examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/stdout.expected.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 # examples/acp-agent/tests/snapshots/permission-switching/session.jsonl # examples/acp-agent/tests/snapshots/plan-mode-reject/session.jsonl # examples/acp-agent/tests/snapshots/plan-mode/session.jsonl # examples/acp-agent/tests/snapshots/session-sandbox-root/session.jsonl # packages/context/session-reference/README.md # packages/core/agent-loop/tests/agent.spec.ts # packages/hooks/hooks-claude/tests/coverage-cases.ts # packages/host/runtime/tests/host-runtime.spec.ts # packages/llm/llm-retry/tests/retry.spec.ts # packages/session-persistence/session-persistence/src/coordinator.ts # packages/support/acp-snapshot/README.md # packages/support/acp-snapshot/src/normalize.ts # packages/ui/acp/acp-feature-support.md # packages/ui/acp/src/codec.ts # packages/ui/acp/src/index.ts # packages/ui/acp/tests/bridge.spec.ts # packages/ui/acp/tests/codec.spec.ts # packages/ui/acp/tests/config-options.spec.ts # packages/ui/acp/tests/dispose.spec.ts # packages/ui/acp/tests/edges.spec.ts # packages/ui/acp/tests/stream-update.spec.ts # packages/ui/acp/tests/turns.spec.ts
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 Agent Note); 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, detached-run quiescence |
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.