> 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-session02-hook-runtime-normalization/implementation_summary.md). # Implementation Summary **Session ID**: `phase09-session02-hook-runtime-normalization` **Package**: `apps/hooks` **Completed**: 2026-05-31 **Duration**: 3-4 hours *** ## Overview Phase 09 Session 02 normalized the hook runtime so Claude and Codex-shaped payloads can move through the same safe helper layer before handlers post events, write spool entries, or log diagnostics. The session stayed inside `apps/hooks`, preserved existing Claude hook map behavior, and added Codex fixture coverage for lifecycle, prompt, Bash, permission, and subagent paths. The privacy boundary was tightened at the runtime edge. Sanitized spool and log helpers now summarize Codex-sensitive prompts, tool input, tool response, transcript paths, MCP arguments, token-like values, and broad paths instead of retaining raw payload bodies. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ------------------------------------------------------------------------------------------- | --------------------------------------------- | ----- | | `.spec_system/specs/phase09-session02-hook-runtime-normalization/validation.md` | Validation report recording the PASS gate set | \~30 | | `.spec_system/specs/phase09-session02-hook-runtime-normalization/IMPLEMENTATION_SUMMARY.md` | Session closeout summary and outcome record | \~55 | ### Files Modified | File | Changes | | ------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- | | `apps/hooks/src/_lib.js` | Added provider normalization helpers, Codex-aware fallback logic, and stronger sanitization for spool/log output. | | `apps/hooks/src/factionos-hero-spawn.js` | Adopted normalized session, CLI, model, permission, and event metadata. | | `apps/hooks/src/factionos-hero-active.js` | Adopted normalized prompt, session, CLI, cwd, and subagent metadata. | | `apps/hooks/src/factionos-hero-idle.js` | Adopted normalized session, event, CLI, and summary fields. | | `apps/hooks/src/factionos-bash-command.js` | Adopted normalized Bash tool input, tool name, session, CLI, and subagent metadata. | | `apps/hooks/src/factionos-git-guard.js` | Kept restricted denial behavior while consuming normalized Bash input. | | `apps/hooks/src/factionos-file-access.js` | Adopted normalized tool name/input and preserved bounded file observability. | | `apps/hooks/src/factionos-permission-request.js` | Adopted normalized permission mode, tool name, and tool input. | | `apps/hooks/src/factionos-awaiting-input.js` | Adopted normalized question payload handling. | | `apps/hooks/src/factionos-input-received.js` | Adopted normalized tool response and session fields. | | `apps/hooks/src/factionos-subagent-spawn.js` | Adopted normalized subagent metadata with Codex agent-field support. | | `apps/hooks/src/factionos-subagent-complete.js` | Adopted normalized subagent metadata with Codex agent-field support. | | `apps/hooks/tests/hookNormalization.test.js` | Added helper coverage for Claude/Codex fallback order and sanitization. | | `apps/hooks/tests/hookRuntime.test.js` | Added Codex-shaped runtime fixtures and no-regression assertions. | | `apps/hooks/tests/orchestrationDiagnostics.test.js` | Added Codex-sensitive diagnostics redaction coverage. | | `apps/hooks/tests/hookPayloads.test.js` | Preserved Claude hook map expectations while exercising helper-backed fields. | | `apps/hooks/README_hooks.md` | Documented provider-neutral normalization and remaining Codex install gaps. | | `.spec_system/specs/phase09-session02-hook-runtime-normalization/spec.md` | Marked the session complete and recorded validation date. | | `.spec_system/PRD/phase_09/PRD_phase_09.md` | Advanced the phase tracker to 2/3 complete and moved Session 02 into completed history. | | `.spec_system/state.json` | Marked the session complete in project state and cleared `current_session`. | | `apps/hooks/package.json` | Bumped the package patch version to `0.1.33`. | *** ## Technical Decisions 1. **Normalize in `_lib.js` instead of per-handler branching**: this keeps Claude compatibility stable and gives later Codex hook-map work one shared fallback layer. 2. **Redact by summary, not raw payload forwarding**: diagnostics and spool entries now keep bounded metadata, which reduces privacy risk while still preserving debuggability. *** ## Test Results | Metric | Value | | -------- | ---------------------------- | | Tests | 32 | | Passed | 32 | | Coverage | Not measured in this session | *** ## Lessons Learned 1. Provider-neutral hook fields should be normalized once and reused across handlers and tests. 2. Codex-shaped payloads can be supported without changing the existing Claude hook map if the sanitization layer stays strict. *** ## Future Considerations Items for future sessions: 1. Add the Codex hook map and Codex-specific handler paths in Session 03. 2. Keep privacy tests current as Codex payload shapes evolve. *** ## Session Statistics * **Tasks**: 24 completed * **Files Created**: 2 * **Files Modified**: 20 * **Tests Added**: 1 * **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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