# BRIEFING — 2026-10-01T02:30:00Z

## Mission
Implement Milestone M2: Client Chat Engine & WebApp UI Integration for FreeExile.

## 🔒 My Identity
- Archetype: worker
- Roles: implementer, qa
- Working directory: c:\Projects\FreeExile\.agents\teamwork\worker_chat_m2_2
- Original parent: ea9d395f-60cc-4be9-a3ac-f706d683a6cd
- Milestone: M2 (Client Chat Engine & WebApp UI Integration)

## 🔒 Key Constraints
- EXCLUSIVE FILE OWNERSHIP:
  - client/src/chat/ChatManager.ts
  - client/webapp/js/ui/chat_ui.js
  - client/webapp/index.html
  - client/webapp/js/main.js
  - tests/unit/test_webapp_chat_ui.py
- Do NOT touch any files in server/chat/ or tools/stress/.
- Soft Cap <= 350 lines for JS logic files, <= 150-200 lines (max 400) for index.html, <= 500 lines for Python test files.
- Integrity: DO NOT cheat, no hardcoded results, real implementations.
- No regression on existing WebApp controls (movement, interaction, modals).

## Current Parent
- Conversation ID: ea9d395f-60cc-4be9-a3ac-f706d683a6cd
- Updated: 2026-10-01T02:30:00Z

## Task Summary
- **What to build**: Extend ClientItemSnapshot in ChatManager.ts, compile client, build client/webapp/js/ui/chat_ui.js (<= 350 lines) with 8 channels, 100-msg ring buffer, auto-scroll, anti-spam, rich item links, mount chat dock and #modal-item-link-tooltip in index.html and main.js, write unit test tests/unit/test_webapp_chat_ui.py, run lint hygiene check.
- **Success criteria**: TypeScript build passes, unit tests pass 100%, hygiene check passes, handoff delivered.
- **Interface contracts**: proto/chat.proto, client/src/chat/ChatManager.ts
- **Code layout**: Tam Phân Lập Native ES Modules, soft caps observed.

## Change Tracker
- **Files modified**:
  - `client/src/chat/ChatManager.ts`: Extended ClientItemSnapshot with itemLevel, createdAtMs, affixes, fallback snapshot query, and hyphens support in signatures.
  - `client/webapp/js/ui/chat_ui.js`: Native ES Module (349 lines <= 350) with 8 channels, 100-msg ring buffer, auto-scroll locking, anti-spam countdown, rich item tags, modal tooltip trigger, 9-language channel localization.
  - `client/webapp/index.html`: Mounted `#chat-dock` and `#modal-item-link-tooltip` (249 lines <= 400).
  - `client/webapp/js/main.js`: Wired Enter key (expand/focus chat dock) and Escape key (close tooltip / collapse chat dock) without breaking movement or interactions (262 lines <= 350).
  - `tests/unit/test_webapp_chat_ui.py`: 13 comprehensive unit tests covering DOM elements, channel keys, ring buffer, rich item tags, HTML rendering, 9-language localization, and key wiring (235 lines <= 500).
- **Build status**: PASS (`tsc` exit 0, 13/13 unit tests pass in 0.68s, 100% hygiene pass).
- **Pending issues**: None

## Quality Status
- **Build/test result**: PASS (13/13 in test_webapp_chat_ui.py, 15/15 in test_mobile_webapp_config.py, 16/16 in test_webapp_localization_engine.py, 18/18 in chat unit tests, 24/24 in test_chat_distributed_system_e2e.py).
- **Lint status**: 0 Hard Cap violations in check_code_and_doc_hygiene.py.
- **Tests added/modified**: tests/unit/test_webapp_chat_ui.py (13 new tests).

## Key Decisions Made
- Multi-channel dock supports 8 channels: World (1), Zone (2), Guild (3), Party (4), Whisper (5), System (6), Recruit (7), Feedback (8).
- Item tag format: `[item:uuid:sig:name:rarity]` parsed and formatted in both TypeScript and ES Module client.
- Tooltip displays 2.5D Cổ Võ styling, quality, crafter, affixes, and `[✓ HMAC Xác Thực]` badge.
- Main.js wires Enter to focus chat input and Escape to close tooltip or collapse chat, leaving WASD, skills, and proximity F interactions intact.

## Artifact Index
- `c:\Projects\FreeExile\.agents\teamwork\worker_chat_m2_2\handoff.md` — Handoff report for orchestrator_8