Solo founder's SolidCraft agent builds a robot arm and rebuilds it after a length change

Brennen Herbruck says an AI agent built a robot arm in his SolidCraft CAD tool, including parts, joints, and a pick-and-place motion study.

In an October 14, 2026 X post, he says he then lengthened the upper arm by 30 mm, and the model rebuilt and still moved correctly. The project is hosted at github.com/bherbruck/solidcraft. The only evidence is the post itself, which includes no video or independent check of the motion.