Author the 62-to-13 joint map and align the AGENTS.md contract with the Quaternius base

AGENTS.md

@@ -93,9 +93,11 @@ specialists the task needs:
 1. **The project contract wins.** `npc_base` mesh node, the 13 required core bones at their rest
    positions, five tint slots, front on Blender −Y / Godot +Z, grounded feet, 24,000
    triangles / 24,000 glTF vertices per character, 1,500 per gear, 4,000 per prop. Optional
-   extra bones (fingers, face, toes) are allowed if they do not move the core rest positions. A skill
-   may recommend another topology, naming or budget scheme; do not adopt it unless the
-   change is explicitly planned and the contract, tests and docs are updated together.
+   extra bones (fingers, face, toes) are allowed if they do not move the core rest positions. The
+   Quaternius 62-joint source rig is authoring-only and bakes to this 13-core contract
+   (ADR-0017); it is not a runtime dependency. A skill may recommend another topology, naming or
+   budget scheme; do not adopt it unless the change is explicitly planned and the contract, tests
+   and docs are updated together.
 2. **Blender MCP is optional interactive tooling.** The headless flatpak scripts
    (`tools/blender_assets.py`, `tools/npc_pipeline.py`) remain authoritative. MCP may be used
    for local part exploration; setup and safety are in [`docs/asset-tooling.md#optional-interactive-blender-mcp`](docs/asset-tooling.md#optional-interactive-blender-mcp).
@@ -104,8 +106,9 @@ specialists the task needs:
 3. **CI stays offline and skill-free.** Skills are local guidance only; every gate must still
    work from a fresh checkout with committed `.glb`/`.png`/`.tres` files and Godot.
 4. **No new asset source without the licence gate.** Skills may suggest reference packs or
-   generated meshes; ADR-0015 (CC0, or CC-BY with attribution in `CREDITS.md`) and the
-   provenance rules in `docs/npc-model-sourcing.md` still apply.
+   generated meshes; ADR-0017 (the CC0 Quaternius NPC base) supersedes the generator-first
+   decision in ADR-0015, and the CC0/CC-BY rule in ADR-0015 (attribution in `CREDITS.md`) plus
+   the provenance rules in `docs/npc-model-sourcing.md` still apply to any new source.
 5. **Evidence, not vibes.** After a skill-informed change, run `blender_assets.py inspect`,
    `audit` and `fit` plus the relevant capture/smoke gates, and say in the handoff which
    skills informed the change and what the measurements were.