# BRIEFING — 2026-10-02T03:06:00Z

## Mission
Forensic Integrity Audit on Milestone 3: Biome Texture Manager, Pattern Fill Chunk Baking, Wire Format 30 Biomes, and Code Hygiene.

## 🔒 My Identity
- Archetype: forensic_auditor
- Roles: critic, specialist, auditor
- Working directory: c:\Projects\FreeExile\.agents\teamwork\auditor_m3\
- Original parent: orchestrator_14 (Conversation ID: 327366ba-dd05-4805-b53b-659a199b1450)
- Target: Milestone 3

## 🔒 Key Constraints
- Audit-only — do NOT modify implementation code
- Trust NOTHING — verify everything independently
- Provide empirical evidence and raw tool outputs
- Binary verdict: CLEAN or INTEGRITY VIOLATION

## Current Parent
- Conversation ID: 327366ba-dd05-4805-b53b-659a199b1450
- Updated: not yet

## Audit Scope
- **Work product**: Milestone 3 deliverables (`biome_texture_manager.js`, `tile_map_renderer.js`, `tile_grid_loader.js`, `map_biome_catalog.py`, `map_binary_serializer.py`, `index.html`)
- **Profile loaded**: General Project
- **Audit type**: forensic integrity check

## Audit Progress
- **Phase**: reporting
- **Checks completed**:
  1. ORIGINAL_REQUEST.md ground-truth constraints inspected (Integrity mode: development).
  2. worker_m3/handoff.md and orchestrator_14/PROJECT.md reviewed.
  3. Source code analysis for facades, hardcoded outputs, and pre-populated artifacts completed.
  4. Authenticity check: `tile_map_renderer.js` pattern fill vs dummy solid fill empirically verified.
  5. Authenticity check: `biome_texture_manager.js` asset loading & CanvasPattern caching/eviction empirically verified.
  6. Authenticity check: `map_biome_catalog.py` & `map_binary_serializer.py` 30 biomes wire format verified roundtrip.
  7. Code hygiene: file line limits measured and `check_code_and_doc_hygiene.py --strict` passed with 0 hard cap violations.
  8. Independent test execution (333 pytests + 3 Node.js test harnesses) 100% green.
- **Checks remaining**: none
- **Findings so far**: CLEAN

## Key Decisions Made
- Confirmed authentic pattern fill and texture loading mechanisms.
- Confirmed zero hard cap hygiene violations.
- Verdict: CLEAN.

## Artifact Index
- c:\Projects\FreeExile\.agents\teamwork\auditor_m3\DISPATCH.md — Assignment instructions
- c:\Projects\FreeExile\.agents\teamwork\auditor_m3\BRIEFING.md — Situational awareness
- c:\Projects\FreeExile\.agents\teamwork\auditor_m3\progress.md — Liveness heartbeat
- c:\Projects\FreeExile\.agents\teamwork\auditor_m3\handoff.md — Forensic audit report

## Attack Surface
- **Hypotheses tested**:
  - H1: `tile_map_renderer.js` might bypass `BiomeTextureManager` or only do solid color fills. Result: DISPROVEN. Real pattern fill verified during chunk baking.
  - H2: `biome_texture_manager.js` might leak memory across biome switches or not cache patterns. Result: DISPROVEN. Immediate eviction and deterministic single-instance caching verified.
  - H3: Wire format might only encode 5 legacy biomes. Result: DISPROVEN. Codes 1..30 all correctly serialized to byte 3 and deserialized.
- **Vulnerabilities found**: None.
- **Untested angles**: None within Milestone 3 scope.

## Loaded Skills
- None explicitly assigned