RealCAD
Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

RealCAD turns a spoken or typed request into a real CAD part you can print, and it measures the result instead of trusting it. My dad bought a 3D printer but couldn't print what he actually needed, because someone has to design it first. I've been a mechanical designer for five years, so I read 100 posts from 3D printing and CAD communities. CAD is hard to learn, printed holes come out small, and AI models look right while the numbers are wrong. You describe a part by voice, text or photo. Muse Spark plans it or writes the CAD code, and a CAD engine measures what came back: hole sizes against fastener standards such as ASME B18.2.8, colliding bolt heads, wall thickness, watertightness, gear mesh and interference between assembled parts. When a check fails, the numbers go back to Muse Spark and it fixes the design. You get STEP, STL, 3MF, DXF and a 3-view PDF. In a seeded test the engine caught 93 of 93 planted faults with no false alarms on 12 correct designs (examples/eval_seeded.py). All project code was written during the hackathon. The third-party code it uses is listed in the README.