# BRIEFING — 2026-10-01T07:42:40Z

## Mission
Investigate and design unified dual-platform control scheme and ergonomics for PC and Mobile in FreeExile WebApp.

## 🔒 My Identity
- Archetype: teamwork_preview_explorer
- Roles: explorer, analyst
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_m1_3_gen2
- Original parent: a47f1e48-2ddf-45d3-8179-86f630ec4561
- Milestone: Milestone 1 - Explorer 3: Controls Ergonomics & Mobile/PC Integration

## 🔒 Key Constraints
- Read-only investigation — do NOT implement in production codebase directly
- Target files: `client/webapp/js/ui/skill_bar_controller.js`, `client/webapp/js/engine/joystick.js`, `client/webapp/index.html`, `client/webapp/js/engine/combat_skills.js`
- Keep file sizes strictly under caps (JS <= 350 lines, HTML <= 200-400 lines)
- PC Controls: Full keyboard binding (Q, W, E, R, Space, Mouse Left/Right, 1-4)
- Mobile Controls: Ergonomic touch layout with virtual dynamic joystick on left, thumb action cluster on right matching `hud_combat_metadata.json` touch radii
- Pointer event handling with dead-zone clamping (> 0.15), multi-touch support without button stuck glitches
- Clean wiring into `combat_skills.js` so clicking skill bar or pressing keys dispatches corresponding skill cast

## Current Parent
- Conversation ID: a47f1e48-2ddf-45d3-8179-86f630ec4561
- Updated: 2026-10-01T07:42:40Z

## Investigation State
- **Explored paths**:
  * `client/webapp/js/engine/joystick.js` (inspected touch & mouse events, math, lack of dead-zone)
  * `client/webapp/js/engine/combat_skills.js` (inspected skill triggers, key handling, canvas click targeting)
  * `client/webapp/index.html` (inspected action cluster layout, 4 buttons, missing primary attack & 4th skill)
  * `client/webapp/assets/ui/combat/hud_combat_metadata.json` (inspected 100px primary, 52px skills, 90px dodge)
  * `client/webapp/js/engine/canvas_renderer.js` & `iso_math.js` (inspected isometric coordinate mapping)
  * `tests/unit/test_character_animation_and_skills_vfx.py` (verified compatibility expectations)
- **Key findings**:
  * `joystick.js` uses legacy `e.touches[0]` which causes touch index collisions and stuck sticks during multi-touch combat.
  * Zero dead-zone clamping currently causes micro-jitter; dead-zone threshold of 0.15 with smooth normalization resolves this.
  * `index.html` cluster lacks Primary Attack button, 4th skill slot, and radial ergonomics.
  * Extracting `skill_bar_controller.js` decouples cooldown sweeps, keybindings, and DOM logic while keeping `combat_skills.js` safely under line caps.
- **Unexplored areas**: None. Complete specification and code designs ready.

## Key Decisions Made
- Transition `joystick.js` to W3C Pointer Events with `setPointerCapture` and `activePointerId` tracking.
- Specify dead-zone clamping with threshold `DEAD_ZONE = 0.15` and smooth linear remap.
- Design `client/webapp/js/ui/skill_bar_controller.js` as an ES module managing cooldown sweeps (CSS conic-gradient), ready flash, and multi-platform input dispatch.
- Re-architect `#combat-cluster` in `index.html` to align with `hud_combat_metadata.json`.

## Artifact Index
- `.agents/teamwork/explorer_m1_3_gen2/DISPATCH.md` — Inbound task dispatch
- `.agents/teamwork/explorer_m1_3_gen2/BRIEFING.md` — Situational awareness working memory
- `.agents/teamwork/explorer_m1_3_gen2/progress.md` — Liveness heartbeat and status
- `.agents/teamwork/explorer_m1_3_gen2/handoff.md` — 5-component handoff report