Claude Opus 5.5 turns graphite into gravity

Claude read a hand-drawn catapult part by part, set the scale by taking the drawn blocks as 40 mm wide, and stood the sketch up as a wooden model on the same sheet. After release, every flight and fall is simulated physics, not scripted motion. The first throw falls short, so the sketch gets more lead (the counterweight goes from 0.48 to 0.68 kg), and the second knocks 7 of 10 blocks down, replayed at quarter speed.