# Conflicts: # docs/config-catalog.md # docs/cordis-catalog/events.md # docs/cordis-catalog/services.md # docs/core-data-structures/core.md # docs/event-producer-consumer.md # docs/persistence-catalog.md # examples/acp-agent/tests/snapshots/advanced-toolchain/session.1.jsonl # examples/acp-agent/tests/snapshots/advanced-toolchain/session.2.jsonl # examples/acp-agent/tests/snapshots/advanced-toolchain/session.jsonl # examples/acp-agent/tests/snapshots/both-mode-turn/session.jsonl # examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl # examples/acp-agent/tests/snapshots/skill-load/session.jsonl # examples/acp-agent/tests/snapshots/text-turn/session.jsonl # examples/sandbox-acp-agent/cordis.yml # examples/sandbox-acp-agent/tests/snapshots/escalation-approved/session.jsonl # examples/sandbox-acp-agent/tests/snapshots/escalation-rejected/session.jsonl # examples/sandbox-acp-agent/tests/snapshots/mode-switching/session.jsonl # packages/compact/compact-basic/README.md # packages/compact/compact-basic/src/index.ts # packages/compact/compact-basic/tests/compact-basic.spec.ts # packages/core/agent-loop/README.md # packages/core/agent-loop/src/loop.ts # packages/core/agent-loop/tests/properties.spec.ts # packages/core/session/README.md # packages/core/session/src/types.ts # packages/core/session/tests/derived-cache.spec.ts # packages/llm/llm-deepseek/src/index.ts # packages/llm/llm-pi-ai/README.md # packages/llm/llm-pi-ai/src/adapter.ts # packages/llm/llm-pi-ai/src/convert.ts # packages/llm/llm-pi-ai/tests/adapter.spec.ts # packages/llm/llm/README.md # packages/llm/llm/src/call-config.ts # packages/llm/llm/src/index.ts # packages/ui/acp-agent/src/index.ts # packages/ui/acp/tests/harness.ts # packages/ui/jsonrpc/README.md # packages/ui/jsonrpc/src/server.ts # packages/ui/stdio-agent/README.md # packages/ui/stdio-agent/src/index.ts # python/sdk/README.i18n.yaml
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); 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.