# BRIEFING — 2026-10-02T01:52:00Z

## Mission
Investigate testing and linting infrastructure for multi-tiered anti-regression across i18n, UI, dictionary parity, and language switching.

## 🔒 My Identity
- Archetype: explorer
- Roles: investigation, synthesis
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_survey_tests_1
- Original parent: 0361e281-a64e-4264-a674-2b16c804009d
- Milestone: Milestone 0 (Survey & Investigation)

## 🔒 Key Constraints
- Read-only investigation — do NOT implement production changes
- Write only inside working directory
- Produce comprehensive survey report and handoff report

## Current Parent
- Conversation ID: 0361e281-a64e-4264-a674-2b16c804009d
- Updated: 2026-10-02T01:52:00Z

## Investigation State
- **Explored paths**:
  - `tools/lint/check_code_and_doc_hygiene.py`, `tools/lint/verify_game_design_matrix.py`
  - `tests/unit/test_challenger_chat_m2.py`, `tests/unit/test_challenger_m2_chat_adversarial.py`
  - `tests/e2e/test_ui_typography_i18n_wiki_streamlining_e2e.py`, `tests/e2e/test_chat_distributed_system_e2e.py`
  - `tools/run_playwright_validation.py`
  - `client/webapp/js/ui/chat_ui.js`, `client/webapp/js/data/i18n.js`, `client/webapp/js/data/i18n_catalog.js`, `client/webapp/index.html`
  - `client/src/i18n/LocalizationManager.ts`
- **Key findings**:
  - `chat_ui.js` contains 33 lines of hardcoded Vietnamese strings and maintains an isolated `CHANNEL_I18N` table without connecting to `FreeExileI18n`.
  - DOM elements for chat tabs, input placeholder, cooldown badge, and send button in `index.html` and `template_catalog_system.js` lack `data-i18n` attributes.
  - Python 3.11.9, pytest 9.1.1, Node v24.14.0, Playwright with Edge (`channel='msedge'`) are fully operational.
  - Formulated full architecture for `tools/lint/check_i18n_hygiene.py`, `tests/unit/test_i18n_event_bus.py`, and `tests/e2e/test_i18n_reactive_switching_e2e.py`.
- **Unexplored areas**: Production implementation details (assigned to implementer subagents in M1/M2).

## Key Decisions Made
- Recommended Python for static linter (`tools/lint/check_i18n_hygiene.py`) matching existing linter conventions.
- Recommended hybrid Python unittest + Node eval harness for fast i18n event bus unit tests (< 1.0s).
- Recommended Playwright with `channel='msedge'` for headless E2E verification of real DOM reactive language updates without page reload.

## Artifact Index
- `DISPATCH.md` — incoming dispatch records
- `progress.md` — liveness heartbeat
- `survey_report.md` — comprehensive survey report
- `handoff.md` — 5-component handoff report