Custom-GLB drop-in system: manifest/registry with procedural fallbacks,
IndexedDB override layer for zero-deploy playtesting, and a three-panel
in-browser fitting editor. Physics/visual decoupling makes every mesh
swappable; blob.body is the one paintable special case (UV requirements).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Driven by the live fresh-eyes finding: a naive racer finishes with 0% paint —
the core mechanic is currently skippable. G makes paint route-guaranteed.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Fixed-step world runtime, event bus wire protocol between lanes, integration
seam (game.ts) with placeholder ball. Lanes A/B/C own disjoint dirs.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
