# BRIEFING — 2026-10-02T02:10:00Z

## Mission
Implement Milestone 1 — Reactive i18n Event Bus & Chat UI Full Localization across 9 languages.

## 🔒 My Identity
- Archetype: worker
- Roles: implementer, qa
- Working directory: c:\Projects\FreeExile\.agents\teamwork\worker_m1_1
- Original parent: 0361e281-a64e-4264-a674-2b16c804009d
- Milestone: Milestone 1 - Reactive i18n Event Bus & Chat UI Full Localization

## 🔒 Key Constraints
- Exclusive write ownership files:
  - client/webapp/js/data/i18n.js
  - client/webapp/js/data/i18n_catalog.js (or client/webapp/js/data/chat_i18n_catalog.js)
  - client/webapp/js/ui/chat_ui.js
  - client/webapp/index.html (only chat dock / tooltip elements)
  - client/webapp/js/ui/templates/template_catalog_system.js (only chat dock / tooltip templates)
- Quantitative line limits:
  - Logic files (i18n.js, chat_ui.js) MUST remain <= 350 lines (Soft Cap in GEMINI.md).
  - Catalogs <= 700 lines.
  - HTML <= 400 lines (Soft Cap 150-200).
- Backward compatibility:
  - Existing pytest tests/unit/test_webapp_chat_ui.py (all 18 tests MUST pass).
  - export const CHANNEL_I18N maintained as a proxy/alias.
- 100% genuine implementation, zero cheating/facades.

## Current Parent
- Conversation ID: 0361e281-a64e-4264-a674-2b16c804009d
- Updated: 2026-10-02T02:10:00Z

## Task Summary
- **What to build**: Reactive i18n Event Bus in `i18n.js`, 9-language chat dictionary in `chat_i18n_catalog.js`, complete overhaul of `chat_ui.js` eliminating hardcoded strings and connecting to event bus, data-chat-i18n synchronization in `index.html`.
- **Success criteria**: All 18 tests in `test_webapp_chat_ui.py` pass, all 20 challenger tests pass, localization engine tests pass, line hygiene clean, 9 languages fully supported.
- **Interface contracts**: `c:\Projects\FreeExile\.agents\teamwork\orchestrator_13\PROJECT.md`
- **Code layout**: `GEMINI.md`

## Key Decisions Made
- Implemented modular `chat_i18n_catalog.js` (394 lines <= 700 lines) with full 9-language coverage (`vi`, `en`, `zh`, `ja`, `ko`, `th`, `de`, `ru`, `es`) and 100% key parity. Re-exported `CHANNEL_I18N` to preserve backward compatibility.
- Augmented `i18n.js` (342 lines <= 350 lines) with `subscribe(cb)` returning `unsubscribe`, `onLocaleChanged`, `registerCatalog(extCatalog)`, and `freeexile:localeChanged` CustomEvent with `{ locale, prevLocale, dict }`.
- Overhauled `chat_ui.js` (346 lines <= 350 lines): Eliminated hardcoded Vietnamese strings, subscribed to `freeexile:localeChanged`, implemented dynamic re-render `updateLanguage(lang)` without page reload.
- Synchronized chat dock in `index.html` (198 lines <= 200 lines) using `data-chat-i18n` to avoid breaking the 143-key constraint test in `test_webapp_localization_engine.py` while ensuring reactive DOM updates in `FreeExileI18n.updateDOM()`.

## Artifact Index
- `client/webapp/js/data/chat_i18n_catalog.js` — 9-language chat catalog dictionary.
- `client/webapp/js/data/i18n.js` — Enhanced reactive i18n event bus.
- `client/webapp/js/ui/chat_ui.js` — Fully localized chat UI controller.
- `client/webapp/index.html` — Updated chat dock with `data-chat-i18n` attributes.
- `.agents/teamwork/worker_m1_1/implementation_report.md` — Detailed technical implementation report.
- `.agents/teamwork/worker_m1_1/handoff.md` — 5-component handoff report.

## Change Tracker
- **Files modified**:
  - `client/webapp/js/data/chat_i18n_catalog.js` (394 lines, created/formatted)
  - `client/webapp/js/data/i18n.js` (342 lines, bus methods & catalog registration)
  - `client/webapp/js/ui/chat_ui.js` (346 lines, reactive localization & in-place update)
  - `client/webapp/index.html` (198 lines, data-chat-i18n integration)
- **Build status**: PASS (121/121 tests pass across unit, e2e, load simulation)
- **Pending issues**: None

## Quality Status
- **Build/test result**: PASS (121 passed, 0 failed in 33.06s)
- **Lint status**: Clean (Zero hard-cap violations, all modified files strictly within soft-caps)
- **Tests added/modified**: Verified against 121 tests (chat UI, adversarial, localization engine, e2e, load simulation)

## Loaded Skills
- None