# BRIEFING — 2026-10-01T00:44:40Z

## Mission
Investigate and design the exact implementation for the Modern ARPG Skill Bar (Action Bar & Cooldown Sweeps) for FreeExile web client.

## 🔒 My Identity
- Archetype: teamwork_preview_explorer
- Roles: explorer, investigator, UI designer
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_m1_2_gen2
- Original parent: a47f1e48-2ddf-45d3-8179-86f630ec4561
- Milestone: Milestone 1 - Explorer 2: Action Bar & Cooldown Sweeps

## 🔒 Key Constraints
- Read-only investigation — do NOT implement directly in production directories
- Strictly adhere to line count limits (JS <= 350 lines, CSS <= 350 lines, Docs <= 400 lines)
- Produce handoff.md with 5 components (Observation, Logic Chain, Caveats, Conclusion, Verification Method)
- Provide proposed file content, CSS rules, exact DOM snippet, and unit test recommendations in our directory

## Current Parent
- Conversation ID: a47f1e48-2ddf-45d3-8179-86f630ec4561
- Updated: 2026-10-01T00:44:40Z

## Investigation State
- **Explored paths**:
  * `client/webapp/index.html` (lines 103-111 combat cluster, CSS & JS includes)
  * `client/webapp/js/engine/combat_skills.js` (key handler, skill functions)
  * `client/webapp/assets/skills/martial_skills_metadata.json` (10 active skills, 4x4 atlas)
  * `tests/unit/test_mobile_webapp_config.py` (backward compatibility requirements)
  * `tools/lint/check_code_and_doc_hygiene.py` (strict hygiene rules)
- **Key findings**:
  * Retained `#skill-fire`, `#skill-thunder`, `#skill-frost`, `#skill-dodge` IDs for regression compatibility
  * Designed 7-slot docked bar: Potion (4), Q, W, E, R, Primary (LMB), Dodge (Space)
  * 360° clockwise conic-gradient overlay with 2° luminous amber sweep edge
  * 0.25s luminous ready pulse keyframes and blocked shake state
  * Zero-allocation `requestAnimationFrame` loop in `SkillBarController`
- **Unexplored areas**:
  * Client integration into `client/webapp/index.html` (reserved for Implementer agent)

## Key Decisions Made
- Authored proposed JS, CSS, HTML, and unit test files in agent working directory
- Verified all proposed files against strict hygiene caps and test assertions (8/8 pass)

## Artifact Index
- DISPATCH.md — Incoming task dispatch record
- BRIEFING.md — Working memory and persistent state
- progress.md — Liveness heartbeat and progress log
- proposed_skill_bar_controller.js — Implementation of SkillBarController (288 lines)
- proposed_hud_skills.css — Stylesheet for ARPG action bar & sweeps (258 lines)
- proposed_index_patch.html — HTML patch snippet for index.html (89 lines)
- proposed_test_suite.py — Unit tests verifying implementation (98 lines, 8/8 pass)
- handoff.md — 5-component handoff report (120 lines)