Opus 5.5 builds a foldable iPhone Duo part by part in code
Claude Opus 5.5 built a 150-part foldable iPhone Duo in code, including hinge and flex cables, with three planted faults proving the checks work.
Opus 5.5 just built the iPhone Duo from code. all 150 parts, one by one. and it folds. 305.8k triangles, 64 design rules, 0 errors. every part is a function. a check runs after each one. nothing gets placed until it passes. the full tree > titanium frame, inner display, logic board > two cells, CELL A and CELL B > hinge: 16 links, 8 sync gears, 24 magnets > 48MP camera, flash, speakers > flex cables through the hinge the checks: -> clearance >= 0.05 mm, 0 clashes -> flex bend >= 0.8 mm through the hinge -> 64 design rules before the render -> fold to 180° on a 64-sample torque curve i broke it on purpose 3 times. the check caught all 3. > CELL B reversed: polarity FAIL > flex bent 0.5 mm, under the minimum: bend FAIL > two hinge magnets, same pole: torque FAIL each one fixed and rechecked green. 64/64, 0 errors. same oracle loop from the studio i quoted. now pointed at hardware. paste into Claude Code ↓ "Rebuild [any device] in code, part by part: 1. Parts list with dimensions first. 2. Each part its own function. Place one at a time. 3. After each, check clearance (>= 0.05 mm), clashes, bends. 4. Plant 3 faults on purpose. Prove the check catches them. 5. Animate moving parts last. No code until I say go." same prompt works for a watch, a drone, a car. save this before it gets buried. you'll want it the day the next device drops.
This post quotes another post: x.com/realnataliefort/status/2113261983612973356