# BRIEFING — 2026-10-03T08:55:00Z

## Mission
Remediate 5 client TypeScript defects in Cocos client scripts & tsconfig, ensuring clean typecheck and 27/27 stress test pass.

## 🔒 My Identity
- Archetype: worker_remediation_client
- Roles: implementer, qa, specialist
- Working directory: c:\Projects\FreeExile\.agents\teamwork\worker_remediation_client
- Original parent: cecb05d6-3b1b-4c90-84e7-b52ac4e7697c
- Milestone: Cocos Client Remediation & Verification

## 🔒 Key Constraints
- Minimal change principle: fix only the 5 specified defects.
- File length limits: logic <= 350 lines (soft), 500 lines (hard).
- Typecheck `npx tsc --noEmit --project client/cocos/tsconfig.json` must pass with 0 errors.
- Stress test `npx tsx tests/unit/test_challenger_cocos_kinematics_stress.ts` must pass 27/27.
- check_code_and_doc_hygiene.py must pass.
- Write handoff.md with 5 components and notify parent with send_message.

## Current Parent
- Conversation ID: cecb05d6-3b1b-4c90-84e7-b52ac4e7697c
- Updated: 2026-10-03T08:55:00Z

## Task Summary
- **What to build**: Fix 5 defects in KinematicsEngine.ts, AStarPathfinder.ts, SpriteAtlasRenderer.ts, AnimationFSM.ts, tsconfig.json.
- **Success criteria**: 0 TS errors, 27/27 stress tests pass, hygiene check pass.
- **Interface contracts**: Cocos client interfaces in client/cocos/assets/scripts/
- **Code layout**: client/cocos/assets/scripts/

## Key Decisions Made
- `client/cocos/tsconfig.json`: Removed deprecated `baseUrl: "./"` under `moduleResolution: "bundler"`, resolving TS5102 error completely.
- `client/cocos/assets/scripts/core/KinematicsEngine.ts`: Computed `velX` and `velY` before updating `wx` and `wy` position properties.
- `client/cocos/assets/scripts/core/AStarPathfinder.ts`:
  - Added `GRID_OFFSET = 32` to map signed coordinates `[-18..18]` into non-negative index space `[14..50]`, preventing TypedArray underflow.
  - Added orthogonal neighbor obstacle checks in `hasLineOfSight` when stepping diagonally to block corner-cutting across diagonal corner seams.
  - Changed step exhaustion fallback in `hasLineOfSight` from `return true` to `return false` when step exceeds 120 without reaching destination.
- `client/cocos/assets/scripts/animation/SpriteAtlasRenderer.ts`: Introduced `clipRowMap` mapping `idle` (0), `run` (1), `attack` (2), `hurt` (3), `dodge` (4), `death` (5) with `targetClipName` resolution.
- `client/cocos/assets/scripts/animation/AnimationFSM.ts`: Replaced single-frame `if` with a bounded `while` loop accumulator, reset `hitStopTimer` on `setState`, and consumed hit-stop time proportionally without discarding entire delta-time steps.

## Artifact Index
- `DISPATCH.md` — Assignment instructions
- `BRIEFING.md` — Persistent context & state
- `progress.md` — Liveness heartbeat
- `handoff.md` — 5-component self-contained handoff report

## Change Tracker
- **Files modified**:
  - `client/cocos/tsconfig.json`: Removed `baseUrl: "./"`.
  - `client/cocos/assets/scripts/core/KinematicsEngine.ts`: Ordered velocity calculation before position updates.
  - `client/cocos/assets/scripts/core/AStarPathfinder.ts`: Added `GRID_OFFSET = 32`, diagonal supercover check, step limit `return false`.
  - `client/cocos/assets/scripts/animation/SpriteAtlasRenderer.ts`: Added clip row mapping via `targetClipName`.
  - `client/cocos/assets/scripts/animation/AnimationFSM.ts`: Added while-loop accumulator and proportional hit-stop consumption.
- **Build status**: `npx tsc --noEmit --project client/cocos/tsconfig.json` -> 0 errors (PASS).
- **Pending issues**: None. All 5 defects remediated.

## Quality Status
- **Build/test result**: 27/27 stress tests PASS (0 FAIL).
- **Lint status**: `check_code_and_doc_hygiene.py` passed; all modified files <= 350 lines (soft cap).
- **Tests added/modified**: `tests/unit/test_challenger_cocos_kinematics_stress.ts` verified 27/27 PASS.

## Loaded Skills
- None