# BRIEFING — 2026-10-01T22:05:00Z

## Mission
Remediate Milestone M4 Iteration 1 defects: fix anti-maphack targeting leak in monster_system.js, enhance war_fog.js persistence and input sanitation, and rewrite test_fog_and_minimap.py to eliminate tautologies with genuine Node.js runtime tests.

## 🔒 My Identity
- Archetype: teamwork_preview_worker
- Roles: implementer, qa
- Working directory: c:\Projects\FreeExile\.agents\teamwork\worker_m4_fix_1
- Original parent: 1cc48fc5-ce57-4f48-8964-24cab4bfcacc
- Milestone: M4 Remediation (Fog of War & Minimap HUD)

## 🔒 Key Constraints
- Anti-Maphack: getBestCombatTarget must strictly check hp > 0, distance <= maxRange, and fog state === 2 (VISIBLE). Return null if in fog or out of range.
- Line caps:
  - monster_system.js <= 490 lines (cap: 500)
  - war_fog.js <= 285 lines (cap: 300)
  - test_fog_and_minimap.py <= 300 lines
- Tests: No tautologies (assert 0 > 0 is False, etc.). Genuine Node.js runtime execution tests.
- All test suites must PASS with 0 regressions.
- check_code_and_doc_hygiene.py --strict must report 0 violations.

## Current Parent
- Conversation ID: 1cc48fc5-ce57-4f48-8964-24cab4bfcacc
- Updated: 2026-10-01T22:05:00Z

## Task Summary
- **What to build**: Fix monster_system.js, war_fog.js, and test_fog_and_minimap.py
- **Success criteria**: All tests pass, anti-maphack guarded, hygiene clean, line caps met
- **Interface contracts**: PROJECT.md / ORIGINAL_REQUEST.md / GEMINI.md

## Change Tracker
- **Files modified**:
  - `client/webapp/js/engine/monster_system.js`: Guarded `getBestCombatTarget` fallback with `hp > 0`, `distance <= maxRange`, and `fogState === 2`; line count: 487 (<= 490).
  - `client/webapp/js/ui/war_fog.js`: Sanitized `initFog` dimensions, registered `beforeunload` listener for pending saves, compacted minor helpers; line count: 284 (<= 285).
  - `tests/unit/test_fog_and_minimap.py`: Replaced tautologies with genuine Node.js runtime subprocess tests for 30Hz throttling, pause freeze, dynamic indicators, and anti-maphack targeting; line count: 289 (<= 300).
- **Build status**: PASS
- **Pending issues**: None

## Quality Status
- **Build/test result**: All test suites passing:
  - `pytest tests/unit/test_fog_and_minimap.py -v`: 14/14 PASS
  - `pytest tests/unit/test_tile_collision.py -v`: 11/11 PASS
  - `pytest tests/unit/test_mobile_webapp_config.py -v`: 15/15 PASS
  - `pytest tests/e2e/test_poe2_map_system_e2e.py -v`: 81/81 PASS
  - `node tools/perf/map_render_benchmark.js`: PASS (0 stationary re-bakes)
  - `pytest tests/unit/ -q`: 975/975 PASS (zero regressions)
- **Lint status**: `python tools/lint/check_code_and_doc_hygiene.py --strict`: 0 violations
- **Tests added/modified**: 14 tests in `test_fog_and_minimap.py` with genuine runtime Node.js subprocess assertions.

## Key Decisions Made
- Replaced Python boolean tautologies and static string matching with Node.js runtime tests that instantiate `MinimapHUD` and execute `getBestCombatTarget` against mock fog and monster arrays.

## Artifact Index
- DISPATCH.md — Assignment instructions
- BRIEFING.md — Persistent context
- progress.md — Liveness log
- handoff.md — Final hard handoff report