# BRIEFING — 2026-10-01T00:49:30Z

## Mission
Investigate client-side WebApp chat integration (ChatManager, UI tabs, 100-msg ring buffer, item tooltips) and 1M CCU stress benchmark architecture.

## 🔒 My Identity
- Archetype: explorer
- Roles: investigator, analyzer, reporter
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_chat_client_bench_1
- Original parent: 7020ed22-d577-4b8a-8fb7-a0bd4b2658d7
- Milestone: chat_client_and_bench_investigation

## 🔒 Key Constraints
- Read-only investigation — do NOT implement
- Follow FreeExile standards (GEMINI.md, Diátaxis, file size limits <= 350-500 lines)
- Deliver findings in handoff.md with 5 components (Observation, Logic Chain, Caveats, Conclusion, Verification Method)

## Current Parent
- Conversation ID: 7020ed22-d577-4b8a-8fb7-a0bd4b2658d7
- Updated: 2026-10-01T00:49:30Z

## Investigation State
- **Explored paths**:
  - `client/src/chat/ChatManager.ts`
  - `client/webapp/index.html`, `client/webapp/css/main.css`, `client/webapp/js/main.js`
  - `client/webapp/js/ui/tooltips.js`, `client/webapp/js/ui/character_equipment.js`, `client/webapp/js/ui/template_manager.js`
  - `server/chat/chat_service.py`, `chat_cluster_router.py`, `channel_manager.py`, `item_link_service.py`
  - `proto/chat.proto`, `docs/architecture/CHAT_AND_SOCIAL_ARCHITECTURE_2026.md`
  - `tools/stress/chat_load_benchmark.py`
- **Key findings**:
  - `ChatManager.ts` compiles cleanly (`npm run build` exits 0), but needs `itemLevel` and `affixes` on `ClientItemSnapshot`.
  - `client/webapp/index.html` lacks Chat UI markup; designed `chat_ui.js` ES module and `#modal-item-link-tooltip` template.
  - Existing benchmark in `tools/stress/chat_load_benchmark.py` runs with p99 = 13.4ms; designed enhancements for concurrent publisher workers, 8 channels, HMAC queries, and multi-round memory leak testing.
- **Unexplored areas**:
  - Full implementation and production WebSocket connection bridge (delegated to implementation agents).

## Key Decisions Made
- Keep `client/src/chat/ChatManager.ts` aligned with `proto/chat.proto`.
- Introduce `client/webapp/js/ui/chat_ui.js` following Tam Phân Lập ES module architecture.
- Bound channel memory to 100 messages per channel using array ring buffer.
- Add 2.5D Cổ Võ modal tooltip with HMAC cryptographic validation badge.
- Upgrade `tools/stress/chat_load_benchmark.py` with concurrent workers and memory leak regression gates.

## Artifact Index
- `c:\Projects\FreeExile\.agents\teamwork\explorer_chat_client_bench_1\handoff.md` — 5-component handoff report
- `c:\Projects\FreeExile\.agents\teamwork\explorer_chat_client_bench_1\progress.md` — Liveness log
- `c:\Projects\FreeExile\.agents\teamwork\explorer_chat_client_bench_1\DISPATCH.md` — Dispatch log