# BRIEFING — 2026-10-02T02:41:55Z

## Mission
Review Milestone 2 E2E Test Suite & Regression Impact for i18n reactive language switching.

## 🔒 My Identity
- Archetype: reviewer
- Roles: reviewer, critic
- Working directory: c:\Projects\FreeExile\.agents\teamwork\reviewer_i18n_m2_2
- Original parent: 0361e281-a64e-4264-a674-2b16c804009d
- Milestone: Milestone 2
- Instance: 2 of 2

## 🔒 Key Constraints
- Review-only — do NOT modify implementation code
- Review work product for correctness, completeness, quality, and adversarial failure modes
- Check for integrity violations (hardcoded test results, facade implementations, bypassed tasks, fabricated logs)
- Adhere to GEMINI.md limits: file length soft cap <= 350 lines

## Current Parent
- Conversation ID: 0361e281-a64e-4264-a674-2b16c804009d
- Updated: 2026-10-02T02:41:55Z

## Review Scope
- **Files to review**: tests/e2e/test_i18n_reactive_switching_e2e.py, tests/unit/test_i18n_event_bus.py, tools/lint/check_i18n_hygiene.py
- **Interface contracts**: c:\Projects\FreeExile\.agents\teamwork\ORIGINAL_REQUEST.md, c:\Projects\FreeExile\.agents\teamwork\orchestrator_13\PROJECT.md
- **Worker reports**: c:\Projects\FreeExile\.agents\teamwork\worker_m2_1\implementation_report.md, c:\Projects\FreeExile\.agents\teamwork\worker_m2_1\handoff.md
- **Review criteria**: Playwright headless msedge execution, zero reload, dynamic updates, round-trip cycles, zero console errors, regression suite stability

## Review Checklist
- **Items reviewed**:
  - `tests/e2e/test_i18n_reactive_switching_e2e.py` (193 lines <= 350 cap)
  - `tests/unit/test_i18n_event_bus.py` (328 lines <= 350 cap)
  - `tools/lint/check_i18n_hygiene.py` (337 lines <= 350 cap)
- **Verdict**: APPROVE
- **Unverified claims**: 0. All claims independently verified.

## Attack Surface
- **Hypotheses tested**:
  - Browser navigation/reload detection (`window.__sessionNavCount`): verified robust.
  - Multi-byte CJK glyph rendering: verified across ZH, JA, KO, VI in Edge DOM.
  - Console error capture: 0 errors detected.
  - Port race conditions: noted minor improvement recommendation.
  - Fixed timeout delays: noted minor improvement recommendation.
- **Vulnerabilities found**: 0 security or functional vulnerabilities.
- **Untested angles**: None within M2 scope.

## Key Decisions Made
- Independent test execution of all suites: E2E passed in 6.56s; regression chat unit suites passed 20/20 in 11.02s; typography E2E passed 60/60 in 0.30s; event bus passed 23/23 in 0.38s; static linter passed cleanly.
- Issued official verdict: APPROVE.

## Artifact Index
- DISPATCH.md — Dispatch history
- BRIEFING.md — Working memory and context
- review_report.md — Detailed review findings and verdict
- handoff.md — Standard 5-component handoff report