# BRIEFING — 2026-10-01T19:28:30Z

## Mission
Extract and document all technical specifications, constraints, boundaries, protocols, and acceptance criteria for the PoE2 Procedural Tile Map System overhaul in FreeExile.

## 🔒 My Identity
- Archetype: Specification Miner
- Roles: Specification Miner, Domain Expert
- Working directory: c:\Projects\FreeExile\.agents\teamwork\spec_miner_map
- Original parent: 1cc48fc5-ce57-4f48-8964-24cab4bfcacc
- Milestone: Map Procedural Overhaul Spec Mining

## 🔒 Key Constraints
- Read-only analysis: Do NOT implement anything in production code.
- Write only to `.agents/teamwork/spec_miner_map/`.
- Soft cap 350 lines, hard cap 500 lines for logic code files; soft cap 400 lines, hard cap 600 lines for docs.
- Zero-tolerance error swallowing; preserve all existing tests (894+ pass).
- Must adhere to Diátaxis and PoE2 gameplay / engineering standards in GEMINI.md, AGENTS.md, POE2_GAMEPLAY_AND_ZONE_ARCHITECTURE.md.

## Current Parent
- Conversation ID: 1cc48fc5-ce57-4f48-8964-24cab4bfcacc
- Updated: 2026-10-01T19:28:30Z

## Task Summary
- **What to build**: Comprehensive technical feature and constraint specification for R1-R5 + regression requirements.
- **Success criteria**: Exhaustive feature inventory (table format), edge cases, protocols, mathematical formulas, data structures, and acceptance criteria in `report.md` and `handoff.md`.
- **Interface contracts**: `server/world/map_data_types.py`, `server/world/procedural_map_engine.py`, `client/webapp/js/engine/world_renderer.js`, `client/webapp/js/engine/collision_engine.js`.
- **Code layout**: Server in `server/`, client in `client/webapp/`, tests in `tests/`.

## Key Decisions Made
- Discovered and cataloged 36 detailed features across 6 technical categories (R1-R5 + Regressions).
- Analyzed 16 distinct edge cases covering path connectivity, corner collision, memory budgeting, and state persistence.
- Formulated exact TileType enum integration (values 0-19) guaranteeing 1-byte Uint8Array efficiency and backward test compatibility.
- Defined 16x16 chunk pre-rendering OffscreenCanvas caching architecture ensuring mobile frame draw calls <= budget and RAM <= 8 MB.
- Verified test baseline: 894/894 unit tests passing, 0 hard cap hygiene violations.
- Delivered exhaustive `report.md` and standard `handoff.md`.

## Artifact Index
- `c:\Projects\FreeExile\.agents\teamwork\spec_miner_map\DISPATCH.md` — Dispatch instructions
- `c:\Projects\FreeExile\.agents\teamwork\spec_miner_map\BRIEFING.md` — Working memory
- `c:\Projects\FreeExile\.agents\teamwork\spec_miner_map\progress.md` — Liveness heartbeat
- `c:\Projects\FreeExile\.agents\teamwork\spec_miner_map\report.md` — Comprehensive feature specification report
- `c:\Projects\FreeExile\.agents\teamwork\spec_miner_map\handoff.md` — 5-component handoff report

## Loaded Skills
- None explicitly assigned in prompt.