# BRIEFING — 2026-10-04T13:38:00Z

## Mission
Fix Scaffolding UV Math Defect, Modularize E2E Tests (< 500 lines Hard Cap), and implement Milestone 2 Cocos Client Integration (SpriteAtlasRenderer upgrade + SkillVfxPlayer) for FreeExile.

## 🔒 My Identity
- Archetype: worker
- Roles: implementer, qa
- Working directory: c:\Projects\FreeExile\.agents\teamwork\worker_rem_1
- Original parent: 34037784-62e1-41f8-bfe6-912696fdec14
- Milestone: milestone_2_remediation

## 🔒 Key Constraints
- Exclusive write ownership:
  - tools/asset_pipeline/monster_character_pipeline_scaffold.py
  - client/cocos/assets/resources/monsters/
  - client/cocos/assets/resources/characters/
  - tests/e2e_cocos/vfx_test_helpers.py
  - tests/e2e_cocos/test_vfx_texture_atlas_pipeline_e2e.py
  - tests/e2e_cocos/test_vfx_scaffolding_and_parity_e2e.py
  - client/cocos/assets/scripts/animation/SpriteAtlasRenderer.ts
  - client/cocos/assets/scripts/combat/SkillVfxPlayer.ts
- File hygiene limits:
  - tools/asset_pipeline/monster_character_pipeline_scaffold.py < 500 lines (actual: 255 lines)
  - tests/e2e_cocos/vfx_test_helpers.py < 200 lines (actual: 167 lines)
  - tests/e2e_cocos/test_vfx_texture_atlas_pipeline_e2e.py < 500 lines (actual: 472 lines)
  - tests/e2e_cocos/test_vfx_scaffolding_and_parity_e2e.py < 350 lines (actual: 131 lines)
  - client/cocos/assets/scripts/animation/SpriteAtlasRenderer.ts < 500 lines (actual: 311 lines)
  - client/cocos/assets/scripts/combat/SkillVfxPlayer.ts < 350 lines (actual: 298 lines)
- Strict typing, zero allocation in hot paths, pivot [0.5, 0.90]
- Zero hygiene errors on `check_code_and_doc_hygiene.py --strict`
- 100% test pass on unit/e2e and Cocos web build (`npm run build:web`)

## Current Parent
- Conversation ID: 34037784-62e1-41f8-bfe6-912696fdec14
- Updated: 2026-10-04T13:38:00Z

## Task Summary
- **What to build**:
  1. Fix UV math in monster/character scaffold with dynamic Power-of-Two dimensions (8192 for monsters, 16384 for characters) and regenerate 16 manifests.
  2. Modularize Cocos E2E tests into a 3-component architecture (`vfx_test_helpers.py`, `test_vfx_texture_atlas_pipeline_e2e.py`, `test_vfx_scaffolding_and_parity_e2e.py`) and harden UV bounds assertions.
  3. Upgrade `SpriteAtlasRenderer.ts` with zero-allocation scratch objects and flexible explicit/sequential manifest parser.
  4. Implement `SkillVfxPlayer.ts` event-driven pooled VFX player listening to `skillCasted`.
- **Success criteria**:
  - All 16 manifests have 0 frames out of bounds (max V = 0.9375).
  - All files strictly under 500 lines Hard Cap.
  - 100% test pass across unit/e2e test suites.
  - 0 TypeScript compilation errors on `npm run build:web`.
  - 0 hygiene errors on `check_code_and_doc_hygiene.py --strict`.

## Change Tracker
- **Files modified/created**:
  - `tools/asset_pipeline/monster_character_pipeline_scaffold.py`: Added `next_power_of_two` and dynamic PoT dimensions.
  - `client/cocos/assets/resources/monsters/archetypes/*/*_anim_manifest.json`: 10 manifests regenerated with normalized UVs.
  - `client/cocos/assets/resources/characters/*/*_anim_manifest.json`: 6 manifests regenerated with normalized UVs.
  - `tests/e2e_cocos/vfx_test_helpers.py`: Shared constants, tables, fixtures, and `validate_manifest_uv_bounds`.
  - `tests/e2e_cocos/test_vfx_texture_atlas_pipeline_e2e.py`: Modularized to 472 lines, hardened scaffolding check.
  - `tests/e2e_cocos/test_vfx_scaffolding_and_parity_e2e.py`: Deep scaffolding invariants, Metal configs, and WebApp parity (131 lines).
  - `client/cocos/assets/scripts/animation/SpriteAtlasRenderer.ts`: Zero-allocation hot path and flexible manifest adapter (311 lines).
  - `client/cocos/assets/scripts/combat/SkillVfxPlayer.ts`: Event-driven pre-warmed pooled player (298 lines).
- **Build status**: PASS (`tsc --noEmit` exit 0, pytest 210/210 passed in `tests/e2e_cocos/`)
- **Pending issues**: None

## Quality Status
- **Build/test result**: PASS (Unit: 9 passed, Asset Campaign E2E: 28 passed, Cocos E2E: 210 passed)
- **Lint status**: 0 hard cap violations on `check_code_and_doc_hygiene.py --strict`
- **Tests added/modified**: `test_vfx_scaffolding_and_parity_e2e.py` (9 tests), hardened Tier 1 scaffolding assertions

## Loaded Skills
- None

## Key Decisions Made
- Used dynamic Power-of-Two height scaling (`next_power_of_two(total_rows * frame_height)`) to keep 8-column layout intact while bounding all UVs strictly in $[0.0, 1.0]$.
- Adopted 3-component test modularization architecture to separate shared fixtures from test runners, bringing all files well below 500-line Hard Cap.
- Pre-allocated reusable scratch Rect and pre-baked UV lookup cache in `SpriteAtlasRenderer.ts` to ensure zero GC pressure in 120 FPS ProMotion render loop.