Cool project. AI is surprisingly good with openscad. I wonder what a custom trained model could do?

I've had mixed results with Chat n OpenSCAD. For my first effort it used BOSL (good skills) but hallucinated functions (bad skills)! It also failed to allow for closing the geometry properly ie adding a tiny epsilon to get unions and diffs etc to join up.

The model was really simple - a threaded "back nut" - basically a hollow thin walled cylinder with a base with a hole in it. The cylinder is threaded on the inside. Its a plumbing part for a long out of production system that still works fine but its leaking and I broke the current nut trying to tighten it. Once I dissembled the joint it turns out it does not need to be tight just stable. It only serves to hold a tube with two O rings in place inside the water inlet to the device and a standard plumbing nut and olive job on the other end of the short tube. A perfect job for 3D printing. It took me six iterations to get the thread right. At one point I miss-read my calipers sigh

I'd love to see what RAG will do for this with a well focused model. There is a lot of decent documentation for OpenSCAD and a lot of literature for this form of modelling.

yes we did a bunch of experiments on this! we could get OS models up to but not beyond any of the best closed foundation models. Gemini 2.5/Claude 4 most reliable as an api option