- For demos and starters, Geometra should own the entire page. Do not wrap demo UIs in extra DOM marketing shells, telemetry rails, or decorative HTML chrome around the canvas.
- Browser demo HTML should stay minimal: a bare full-viewport canvas, required bootstrapping styles, and the script entrypoint.
- If a demo needs diagnostics, onboarding, or supporting UI, render that UI in Geometra itself instead of adjacent DOM panels.