> For the complete documentation index, see [llms.txt](https://faction-os.gitbook.io/faction-os-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase09-session03-codex-hook-map-and-codex-specific-handlers/implementation_summary.md). # Implementation Summary **Session ID**: `phase09-session03-codex-hook-map-and-codex-specific-handlers` **Package**: `apps/hooks` **Completed**: 2026-05-31 **Duration**: 3-4 hours *** ## Overview Phase 09 Session 03 added the first Codex-specific hook map and the minimal handler coverage needed to turn the provider-neutral hook/runtime foundation into a concrete Codex hook surface. The work stayed inside `apps/hooks`, preserved existing Claude hook behavior, and added Codex map and handler coverage for lifecycle, tool, permission, result, and subagent events. Privacy boundaries stayed strict. The new handlers and tests keep raw patch bodies, terminal output, transcript paths, MCP argument bodies, token-like values, and broad local paths out of logs, spool entries, and promoted event payloads. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ----------------------------------------------------------------------------------------------------------- | --------------------------------------------- | ----- | | `.spec_system/specs/phase09-session03-codex-hook-map-and-codex-specific-handlers/validation.md` | Validation report recording the PASS gate set | \~25 | | `.spec_system/specs/phase09-session03-codex-hook-map-and-codex-specific-handlers/IMPLEMENTATION_SUMMARY.md` | Session closeout summary and outcome record | \~70 | | `apps/hooks/hooks.claude.json` | Provider-specific Claude hook map copy | \~120 | | `apps/hooks/hooks.codex.json` | Codex hook map template and provider wiring | \~180 | | `apps/hooks/src/factionos-subagent-start.js` | Codex `SubagentStart` adapter | \~80 | | `apps/hooks/src/factionos-tool-result.js` | Codex `PostToolUse` result adapter | \~110 | | `apps/hooks/tests/codexHookMap.test.js` | Static Codex and Claude map assertions | \~220 | ### Files Modified | File | Changes | | --------------------------------------------------- | -------------------------------------------------------------------------------------- | | `.spec_system/state.json` | Marked the session complete and advanced phase tracking. | | `.spec_system/PRD/phase_09/PRD_phase_09.md` | Updated the phase tracker to 3/3 complete and recorded the session as validated. | | `.spec_system/PRD/PRD.md` | Updated the master phase-09 status map and archived planning references. | | `apps/hooks/README_hooks.md` | Documented Codex map readiness, trust review, install gap, and privacy boundaries. | | `apps/hooks/src/factionos-file-access.js` | Summarized Codex `apply_patch` file edits without raw diff storage. | | `apps/hooks/src/factionos-permission-request.js` | Improved Codex tool-description handling while staying decision-free. | | `apps/hooks/src/factionos-subagent-complete.js` | Added Codex agent stop summaries and transcript-path redaction. | | `apps/hooks/tests/hookPayloads.test.js` | Added static assertions for new handlers and no raw field promotion. | | `apps/hooks/tests/hookRuntime.test.js` | Added Codex map-driven runtime fixtures. | | `apps/hooks/tests/orchestrationDiagnostics.test.js` | Added redaction coverage for Codex patch, transcript, terminal, MCP, and agent fields. | | `apps/hooks/package.json` | Bumped the package patch version to `0.1.34`. | *** ## Technical Decisions 1. **Provider-specific maps with a compatibility alias**: `hooks.json` remains the Claude-compatible path while `hooks.claude.json` and `hooks.codex.json` make the provider split explicit. 2. **Bounded result and patch summaries**: Codex `apply_patch`, MCP, and subagent payloads are summarized rather than stored raw to keep local observability useful without leaking sensitive bodies. *** ## Test Results | Metric | Value | | -------- | ------------ | | Tests | 51 | | Passed | 51 | | Coverage | Not measured | *** ## Lessons Learned 1. Codex hook compatibility is easiest to preserve when the provider split is represented in source-controlled map files instead of installer logic. 2. Privacy tests need to cover real Codex-shaped payloads, not only generic handler stubs. *** ## Future Considerations Items for future sessions: 1. Wire the Codex hook maps into installer and uninstall flows. 2. Expand server and product-surface Codex awareness in later phases. *** ## Session Statistics * **Tasks**: 22 completed * **Files Created**: 7 * **Files Modified**: 11 * **Tests Added**: 2 * **Blockers**: 0 resolved --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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