Starter Kit Racing was packaged by PLAYCHIVE from:
https://github.com/mrdoob/Starter-Kit-Racing.git
Pinned source commit: 40942fbcefc833a80db6583040fcba27e0e7e6c1

Upstream project license: MIT (Copyright 2023 Kenney; Copyright 2026 mrdoob).
Game meshes are identified by upstream as Kenney CC0 assets in README.md.
PLAYCHIVE packaging changes: local vendoring of Three.js 0.185.1,
crashcat 0.0.3 and mathcat 0.0.11; removal of remote
CDN imports and off-site UI links. No gameplay source or mesh data is replaced.