Rewrite NPC plans around the Quaternius base

docs/blender-assets.md

@@ -3,7 +3,10 @@
 Architecture context: the asset contracts and fallback path are summarized in
 [`architecture.md`](architecture.md#content-and-asset-pipeline-architecture).
 
-Status: built, audited, and integrated (2026-11-01). `NpcAvatar` selects the
+Status: built, audited, and integrated (2026-11-01). The active character migration
+replaces the procedural body with a baked CC0 Quaternius base
+([ADR-0017](adr/0017-quaternius-npc-base.md)); the current library remains the shipped
+fallback until the Quaternius 12-variant baseline passes review. `NpcAvatar` selects the
 character variants and attaches the gear; `WorldBuilder` loads the prop library
 with colliders and phase-driven emissives. The 0.9.4 neutral baseline and its
 acceptance criteria are in [`npc-visual-review.md`](npc-visual-review.md);
@@ -63,7 +66,7 @@ flatpak run org.blender.Blender --background \
 flatpak run org.blender.Blender --background \
   --python "$PWD/tools/npc_parts.py" -- extract --part hand_l --variant npc_casual \
   --out "$PWD/tmp/npc-parts/npc_casual/hand_l.glb"
-# Assemble a variant (currently rebuilds the procedural character)
+# Assemble a variant (current fallback path; Quaternius migration in progress)
 flatpak run org.blender.Blender --background \
   --python "$PWD/tools/npc_parts.py" -- assemble --variant npc_casual \
   --out "$PWD/tmp/npc-parts/npc_casual/assembled.glb"
@@ -139,7 +142,8 @@ render about 2.5 min.
 
 ## Characters
 
-All library variants share the [character and gear asset contract](architecture.md#character-and-gear-asset-contract):
+All library variants, including the incoming Quaternius-derived base, share the
+[character and gear asset contract](architecture.md#character-and-gear-asset-contract):
 `npc_base` mesh node, required 13 core bones (optional extras allowed), five
 tint slots, +Z visual front, 24,000/24,000 character budget and the same 256²
 slot-map/AO rules. Role selection and look notes: