# BRIEFING — 2026-10-02T06:49:15Z

## Mission
Probe and document authoritative tech art specifications and client sync destination mappings for FreeExile 21 DRQ asset packages.

## 🔒 My Identity
- Archetype: Specification Miner
- Roles: Tech Art & Client Sync Explorer
- Working directory: c:\Projects\FreeExile\.agents\teamwork\spec_miner_techart_3\
- Original parent: a51efd02-6b77-4f96-b8ee-621b750c7e54
- Milestone: 21 DRQ Asset Generation & Client Sync Preparation

## 🔒 Key Constraints
- Read-only probe; do NOT implement game assets or code changes
- Mathematical implementation of Tangent-Space Sobel Normal Maps with Blue channel mean >= 128
- Emissive mask generation rules and math
- Metal compute shaders for FreeExile PBR 2.5D syntax and conventions
- Atlas metadata JSON format schema and fields
- Exact destination mapping from approved assets to client/webapp/assets/
- Document all discovered features and edge cases in required table formats

## Current Parent
- Conversation ID: a51efd02-6b77-4f96-b8ee-621b750c7e54
- Updated: 2026-10-02T06:49:15Z

## Task Summary
- **What to build**: Specification report on tech art math, shaders, metadata formats, and sync paths for 21 DRQ packages.
- **Success criteria**: Comprehensive handoff.md detailing normal map math, emissive generation, Metal shaders, JSON schemas, and exact file-by-file client sync paths.
- **Interface contracts**: `tools/asset_pipeline/`, `docs/standards/DESIGN_PIPELINE_AND_CROSS_DEPT_WORKFLOW.md`, `client/webapp/assets/`
- **Code layout**: Python tools in `tools/asset_pipeline/`, client assets in `client/webapp/assets/`, approved assets in `assets/approved/`.

## Key Decisions Made
- Confirmed mathematical foundation of Tangent-Space Sobel normal maps: $dz = 1.0$ guarantees $B \ge 128$; transparent pixel padding $(128, 128, 255)$ prevents $B_{\text{mean}} \le 128$ audit failures.
- Analyzed HSV saturation-value thresholding and color isolation for emissive masks.
- Analyzed Apple Metal compute and PBR shader syntax, SIMD alignment, and uniform layouts.
- Mapped all 78 deliverables across 21 DRQs to exact destination paths in `client/webapp/assets/`.
- Audited current repo state: 12 deliverables currently exist on disk, 66 missing.

## Artifact Index
- `handoff.md` — Final 5-component handoff report and feature discovery tables
- `progress.md` — Liveness heartbeat and progress tracking
- `DISPATCH.md` — Incoming dispatch directives
- `drqs.json` — Raw parsed metadata for all 21 DRQs
- `drq_summary.json` — Categorized deliverables and technical specs
- `deliverables_inventory.txt` — Existing vs missing deliverables inventory on disk
- `exact_mapping.txt` — File-by-file source-to-client destination mapping table