I spent quite a bit of time using openscad which Claude code to try to build a capstan (rope driven) joint for robotics. It worked well but had some issues with agentic stuff and speed. In the end I ended up taking a detour and building my own agentic cad modeling harness based on some of the same open source libraries that openscad uses. Now I’m trying to turn that into its own standalone product. You can check it out at http://partforge.ai