> 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/phase12-session01-codex-plugin-packaging/implementation_summary.md).

# Implementation Summary

**Session ID**: `phase12-session01-codex-plugin-packaging` **Package**: Cross-cutting **Completed**: 2026-05-31 **Decision**: Defer Codex plugin packaging for this release.

***

## Overview

This session evaluated Codex plugin packaging against the Phase 12 criteria and current OpenAI Codex hook/plugin behavior. The decision gate failed because a plugin package does not provide a concrete maintenance, distribution, or trust-review benefit over the already validated direct user-level hook path.

Direct Codex support remains:

1. `factionos init --cli codex` or `factionos init --cli all`
2. Start a new Codex CLI session
3. Review loaded hooks with `/hooks`
4. Use `factionos status --cli codex`, `factionos doctor --cli codex`, and `factionos uninstall --cli codex` for posture and cleanup

No `.codex-plugin/`, repo marketplace, plugin cache workflow, or plugin uninstall behavior is shipped or claimed by this session.

***

## Deliverables

### Files Created

| File                                                                                             | Purpose                                                                      |
| ------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------- |
| `.spec_system/specs/phase12-session01-codex-plugin-packaging/codex-plugin-packaging-decision.md` | Source-backed ship/defer decision record and Session 02 handoff.             |
| `.spec_system/specs/phase12-session01-codex-plugin-packaging/codex-plugin-validation-plan.md`    | Branch-specific validation plan and no-overclaim evidence.                   |
| `.spec_system/specs/phase12-session01-codex-plugin-packaging/implementation-notes.md`            | Task log, command evidence, privacy review, docs touched, and handoff notes. |
| `.spec_system/specs/phase12-session01-codex-plugin-packaging/IMPLEMENTATION_SUMMARY.md`          | Session closeout summary.                                                    |

### Files Modified

| File                                                                   | Changes                                                                            |
| ---------------------------------------------------------------------- | ---------------------------------------------------------------------------------- |
| `.spec_system/specs/phase12-session01-codex-plugin-packaging/tasks.md` | Marked all 23 tasks complete.                                                      |
| `README.md`                                                            | Updated high-level Codex plugin deferral wording.                                  |
| `docs/README_docs.md`                                                  | Updated docs routing for the finalized Session 01 decision.                        |
| `docs/development.md`                                                  | Added developer workflow note for plugin deferral and no plugin validation claims. |
| `docs/api/event-api-hook-contracts.md`                                 | Added selected-branch install-surface and plugin no-claim wording.                 |
| `apps/cli/README_cli.md`                                               | Clarified direct Codex hooks remain the supported baseline.                        |
| `apps/hooks/README_hooks.md`                                           | Added plugin trust-review behavior and future reuse boundaries.                    |

***

## Test Results

| Command                                                                                      | Result                                           |
| -------------------------------------------------------------------------------------------- | ------------------------------------------------ |
| `npx vitest run apps/cli/tests/codexInstaller.test.js apps/hooks/tests/codexHookMap.test.js` | Pass: 2 files, 20 tests.                         |
| `npm run format:check`                                                                       | Pass.                                            |
| `npm run lint`                                                                               | Pass.                                            |
| `git diff --check`                                                                           | Pass.                                            |
| Targeted ASCII/LF scan over touched files                                                    | Pass.                                            |
| Targeted sensitive-string review over touched files                                          | Pass with expected negative-policy wording only. |

***

## Session 02 Handoff

Session 02 can safely claim that Codex plugin packaging is explicitly deferred and that direct user-level Codex hooks remain the supported release path.

Session 02 must not claim plugin install, plugin cache refresh, plugin trust review, plugin uninstall, project-local trusted `.codex` setup, trust bypass, hosted telemetry, hosted identity, production-hosted validation, remote execution, or broad trusted erasure.


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