Text To Cad Harness

This is an open source harness that lets Claude Code and other AI coding agents generate 3D CAD models from text prompts using build123d and OpenCascade. You describe a part, the agent writes Python scripts in a models/ directory, and you get STEP, STL, GLB, and URDF exports along with a local React viewer at localhost:4178. The workflow is source controlled geometry: all models live as Python files you can version, edit, and regenerate. The viewer gives you @cad[...] references you can paste back into prompts for precise follow-up edits like "add a countersunk hole here." Built by ara.so, this is useful if you want programmatic CAD without opening Fusion or SolidWorks, especially for parametric parts, assemblies, or robot descriptions.