# BRIEFING — 2026-10-01T02:44:00Z

## Mission
Investigate Milestone 2 Character Animation & Visceral Combat Feel Engine focusing on the 5-Phase Kinetic State Machine (`animation_engine.js`) and 4 Weapon Archetypes (`weapon_swing_catalog.js`), comparing against E2E tests, and producing an actionable implementation strategy report.

## 🔒 My Identity
- Archetype: explorer
- Roles: Read-only investigation, architectural analysis, synthesis, implementation strategy
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_m2_1_gen3
- Original parent: 77cd448f-be37-473e-809c-59db9f78e386
- Milestone: Milestone 2 (Character Animation & Visceral Combat Feel Engine)

## 🔒 Key Constraints
- Read-only investigation — do NOT implement
- Line length caps: <= 350 soft / <= 500 hard for logic, <= 700 soft / <= 1000 hard for catalog
- Respect E2E test expectations and interface signatures
- High density, clear evidence chain with line numbers and file paths

## Current Parent
- Conversation ID: 77cd448f-be37-473e-809c-59db9f78e386
- Updated: 2026-10-01T02:44:00Z

## Investigation State
- **Explored paths**:
  - `client/webapp/js/engine/animation_engine.js` (311 lines)
  - `client/webapp/js/data/weapon_swing_catalog.js` (113 lines)
  - `client/webapp/js/engine/combat_feel_engine.js` (198 lines)
  - `client/webapp/js/engine/weapon_swing_renderer.js` (166 lines)
  - `client/webapp/js/engine/entity_renderer.js` (427 lines)
  - `client/webapp/js/engine/canvas_renderer.js` (297 lines)
  - `client/webapp/js/engine/combat_skills.js` (472 lines)
  - `tests/e2e/test_poe2_ui_animation_vfx_e2e.py` (351 lines, 42 tests)
  - `tests/unit/test_martial_character_ecosystem.py` (122 lines, 5 tests)
  - `PROJECT.md`, `SCOPE.md`, `ORIGINAL_REQUEST.md`
- **Key findings**:
  - `animation_engine.js` defines `HERO_TRACKS` and atlas grid rendering, but `kineticPhase` is only set to `'hit_stop'` and otherwise stays `'idle'`. It needs full 5-phase kinetic machine tracking (`idle`, `run`, `wind_up`, `impact`, `recovery`).
  - `weapon_swing_catalog.js` defines all 4 archetypes (`SLASH`, `THRUST`, `SLAM`, `BOLT`) completely, and `weapon_swing_renderer.js` has dynamic visual arc/cone/radial/beam rendering, but neither is wired into `canvas_renderer.js` or `combat_skills.js`.
  - `combat_feel_engine.js` implements micro hit-stop and 64-slot damage number pooling, but is not yet called on hit in `combat_skills.js` or rendered in `canvas_renderer.js`.
  - `combat_skills.js` has 472 lines (warning: near 500 line hard cap!). `dodgeCharges` is not decremented or recharged over 3.0s, and wind-up animation cancelling is missing.
  - `entity_renderer.js` uses dynamic array push/splice for ghost trails; needs static `GhostTrailPool` (32 slots) while staying under 500 lines.
- **Unexplored areas**: None for M2 scope.

## Key Decisions Made
- Formulated comprehensive 5-step worker implementation strategy adhering strictly to line length caps and project standards.

## Artifact Index
- `handoff.md` — Comprehensive handoff report with 5-component protocol
- `progress.md` — Progress and liveness tracker