Raise character limits and document optional Blender MCP

AGENTS.md

@@ -88,15 +88,17 @@ specialists the task needs:
 
 ### Project rules that override a skill
 
-1. **The project contract wins.** `npc_base` mesh node, the 13 contract bones at their rest
-   positions, five tint slots, front on Blender −Y / Godot +Z, grounded feet, 8,000
-   triangles / 8,000 glTF vertices per character, 1,500 per gear, 4,000 per prop. A skill
+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, 16,000
+   triangles / 16,000 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.
-2. **There is no Blender MCP here.** The skills assume MCP tools; this project runs Blender
-   as headless flatpak scripts (`tools/blender_assets.py`, `tools/npc_pipeline.py`). Translate
-   MCP steps into script changes or CLI runs. Never add an MCP dependency to the build, CI or
-   runtime.
+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/blender-mcp.md`](docs/blender-mcp.md).
+   Never add an MCP dependency to the build, CI, tests or runtime, and always re-run the CLI
+   audit/fit gates on anything MCP touched.
 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