— 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, no vertical slider controlling crown submersion, no Heureka moment; instead delivers a generic single-sphere Archimedes simulator with correct spherical-cap buoyancy math and drag interaction but dark background throughout.
9,099 output tokens · claude-opus-4-6 · end_turn
Completely misses the prompt's core requirement — no two crowns, no vertical slider controlling crown submersion, no Heureka moment; instead delivers a generic single-sphere Archimedes simulator with correct spherical-cap buoyancy math and drag interaction but dark background throughout.