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# Implementation Summary

**Session ID**: `phase11-session02-test-fixture-hardening` **Package**: Cross-cutting **Completed**: 2026-05-31 **Duration**: 3.5 hours

***

## Overview

This session hardened the Codex integration with source-backed fixture coverage across protocol, hooks, CLI, server, and web tests. It validated the Codex provider split, redaction boundaries, lifecycle replay behavior, and fixture-safe handling of sensitive fields without introducing hosted changes or new product surface area.

***

## Deliverables

### Files Created

| File                                                                                    | Purpose                  | Lines |
| --------------------------------------------------------------------------------------- | ------------------------ | ----- |
| `.spec_system/specs/phase11-session02-test-fixture-hardening/IMPLEMENTATION_SUMMARY.md` | Session closeout summary | \~35  |

### Files Modified

| File                                                                  | Changes                                                              |
| --------------------------------------------------------------------- | -------------------------------------------------------------------- |
| `.spec_system/specs/phase11-session02-test-fixture-hardening/spec.md` | Marked the session complete                                          |
| `.spec_system/PRD/phase_11/PRD_phase_11.md`                           | Updated progress, completed session entry, and upcoming session list |
| `.spec_system/PRD/PRD.md`                                             | Marked Phase 11 Session 02 as complete in the master PRD             |
| `.spec_system/state.json`                                             | Cleared the active session and recorded completion history           |
| `package.json`                                                        | Bumped the patch version to `0.1.85`                                 |

***

## Technical Decisions

1. **Cross-cutting summary artifact**: The summary is stored with the session spec so the validation and closeout record remain colocated.
2. **Patch-only version bump**: The update followed the repo convention for `updateprd` and preserved the existing major and minor version.

***

## Test Results

| Metric   | Value        |
| -------- | ------------ |
| Tests    | 2372         |
| Passed   | 2371         |
| Coverage | Not reported |

***

## Lessons Learned

1. Fixture-backed Codex validation can cover the provider split without live credentials.
2. Redaction assertions are most useful when they target the boundary that consumes the data.

***

## Future Considerations

Items for future sessions:

1. Finish Phase 11 Session 03 with a real or fixture-replayed Codex validation pass.
2. Keep new Codex-facing fixtures synthetic and redacted by construction.

***

## Session Statistics

* **Tasks**: 25 completed
* **Files Created**: 1
* **Files Modified**: 5
* **Tests Added**: 0
* **Blockers**: 0 resolved


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