# BRIEFING — 2026-10-03T08:58:00Z

## Mission
Remediate server gateway opcode tables, deadzone threshold, clean deterministic opcode routing, and ground Tier 4 E2E test assertions to eliminate facades.

## 🔒 My Identity
- Archetype: teamwork_preview_worker
- Roles: implementer, qa, specialist
- Working directory: c:\Projects\FreeExile\.agents\teamwork\worker_remediation_server_and_tests
- Original parent: cecb05d6-3b1b-4c90-84e7-b52ac4e7697c
- Milestone: Remediation of Server Gateway & Grounding of E2E Tests

## 🔒 Key Constraints
- Harmonize binary opcodes in ws_gateway_bridge.py with OpcodeRegistry.ts and TEST_INFRA.md:
  * 0x0010: PlayerMoveInput
  * 0x0011: EntityState
  * 0x0012: ZoneData / ZoneInfoPayload
  * 0x0020: CastMartialSkillRequest
  * 0x0021: PhantomEvasionRequest
  * 0x0022: CombatDamageEvent
  * 0x0030: EnterZoneRequest
  * 0x0031: ZonePortalData
  * 0x0040: ChatMessage
  * 0x0050: QuickRegisterRequest / LoginRequest
- Deadzone mathematics: math.hypot(input_x, input_y) <= 0.05
- Deterministic opcode routing without ad-hoc heuristic hacks
- Ground Tier 4 E2E test assertions to eliminate all facades and dummy logic
- All tests must pass (unit tests and e2e cocos tests)
- File length caps: <= 350 lines per file (soft cap)
- Never cheat or fabricate test results

## Current Parent
- Conversation ID: cecb05d6-3b1b-4c90-84e7-b52ac4e7697c
- Updated: 2026-10-03T08:58:00Z

## Task Summary
- **What to build**: Server gateway opcode synchronization, deadzone fix, E2E test assertion grounding against real domain components.
- **Success criteria**: 100% tests pass via pytest, 0 facades, 0 lint/hygiene violations.
- **Interface contracts**: `PROJECT.md`, `TEST_INFRA.md`, `client/cocos/assets/scripts/network/OpcodeRegistry.ts`.
- **Code layout**: `server/gateway/ws_gateway_bridge.py`, `tests/unit/test_ws_protobuf_gateway.py`, `tests/e2e_cocos/test_tier4_human_player_journey.py`, `client/cocos/assets/scripts/core/KinematicsEngine.ts`.

## Key Decisions Made
- Canonical opcode table implemented in ws_gateway_bridge.py strictly matching DISPATCH specification.
- Deadzone threshold unified to `math.hypot(input_x, input_y) <= 0.05` across client and server.
- Removed ad-hoc heuristic routing hack from ws_gateway_bridge.py lines 159-183 in favor of deterministic dispatch.
- Grounded all Tier 4 E2E tests against genuine domain components (AccountRepository, CharacterService, ZoneEngine, MovementAuthorityEngine, WsGatewayBridge, NpcEngine, ProceduralMapEngine, MonsterScalingEngine).
- Fixed velocity calculation order in KinematicsEngine.ts so velX and velY measure displacement before updating position.
- Streamlined `test_tier4_human_player_journey.py` to 325 lines, strictly below the 350-line soft cap.

## Artifact Index
- `server/gateway/ws_gateway_bridge.py` — Gateway bridge with harmonized opcodes, deadzone, deterministic routing (317 lines)
- `tests/unit/test_ws_protobuf_gateway.py` — Gateway unit tests verified (280 lines)
- `tests/e2e_cocos/test_tier4_human_player_journey.py` — Grounded Tier 4 E2E tests (325 lines)
- `client/cocos/assets/scripts/core/KinematicsEngine.ts` — Kinematics velocity fix (146 lines)

## Change Tracker
- **Files modified**:
  * `server/gateway/ws_gateway_bridge.py`: Harmonized opcodes, deadzone math <= 0.05, removed heuristic routing hack
  * `tests/unit/test_ws_protobuf_gateway.py`: Updated opcode 0x0010 framing assertions and added deadzone tests
  * `tests/e2e_cocos/test_tier4_human_player_journey.py`: Replaced all dummy/facade asserts with authentic component tests
  * `client/cocos/assets/scripts/core/KinematicsEngine.ts`: Fixed velocity subtraction order
- **Build status**: PASS (pytest unit: 8/8 passed, pytest e2e_cocos: 178/178 passed, tsc --noEmit: passed)
- **Pending issues**: None

## Quality Status
- **Build/test result**: 100% tests passed (0 failures)
- **Lint status**: 0 hard cap violations, all modified files strictly <= 350 lines
- **Tests added/modified**: 8 unit tests in test_ws_protobuf_gateway.py, 18 grounded tests in test_tier4_human_player_journey.py

## Loaded Skills
- None