— Two crowns — Same mass, different density — Vertical slider — Slider works — Slider controls crowns — Slider direction correct — Full slider range ✓ Fall animation — Water displacement — Rising water level — Splash effects — Physics correct ✓ Live mass value — Live volume value ✓ Live density value ✓ Live displaced water — Gilded displaces more — Heureka animation ✓ No external deps — Light bg / dark text ✓ Self-contained HTML
Completely misses the prompt's core requirement — no two crowns (gold vs. gilded), no vertical slider controlling immersion depth, no rising water level, no splash effects, and dark background violates light-bg spec; the demo is a general Archimedes material-selector toy unrelated to the crown scenario.
7,971 output tokens · claude-opus-4-6 · end_turn
Completely misses the prompt's core requirement — no two crowns (gold vs. gilded), no vertical slider controlling immersion depth, no rising water level, no splash effects, and dark background violates light-bg spec; the demo is a general Archimedes material-selector toy unrelated to the crown scenario.