server.py serves the repo root rather than web/, so the 2D prototype stays
reachable next to the 3D port — you want to flip between the reference
implementation and the thing you're porting without stopping the server.
--selfcheck verifies the tree and prints URLs; no node, no network.
three r175 is copied in from 90sDJsim rather than referenced, so the game has
no runtime dependency on a sibling checkout.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
