Adds a Section B rule to the review-architecture skill: a new node kind or geometry change that exposes paintable parts must carry overrides in a schema `slots` record resolved via def.capabilities.paint (and thread it through clone/duplicate/preset paths), and texturable def.geometry must emit UVs in metres (1 unit = 1 m) so catalog finishes tile. Surfaced in the skill description too. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>