✓ 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
All prompt requirements implemented in a single SVG-based file with correct Archimedes physics (1000 g, Au 19.3 g/cm³ / 51.8 cm³, alloy 13.0 g/cm³ / 76.9 cm³), but the water-level marker annotation uses raw pixel values ("px") instead of physical volume units, and mass/density display values are static rather than dynamically computed.
9,871 output tokens · claude-opus-4-6 · end_turn
All prompt requirements implemented in a single SVG-based file with correct Archimedes physics (1000 g, Au 19.3 g/cm³ / 51.8 cm³, alloy 13.0 g/cm³ / 76.9 cm³), but the water-level marker annotation uses raw pixel values ("px") instead of physical volume units, and mass/density display values are static rather than dynamically computed.