— 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
Competent general Archimedes buoyancy simulator with correct physics and smooth spring animation, but entirely misses the prompt: no two crowns, no Archimedes/Heureka narrative, no vertical immersion slider, no splash effects, and dark background contradicts the light-bg requirement.
7,463 output tokens · claude-opus-4-6 · end_turn
Competent general Archimedes buoyancy simulator with correct physics and smooth spring animation, but entirely misses the prompt: no two crowns, no Archimedes/Heureka narrative, no vertical immersion slider, no splash effects, and dark background contradicts the light-bg requirement.