for incredibly simple parts that i can describe using measurements, i've had a lot of fun pointing a high-power ai at openscad and letting it iterate through making the design for me
it's still tough to turn it into something i can then keep fiddling with in freecad though
put on "tron: ares" in the background to fully appreciate the model designing something that will be 3d-printed :)
I haven't tried it, but FreeCAD has scripting
https://wiki.freecad.org/Python_scripting_tutorial
Edit: Your website is quite confusing. Took me awhile...
ty for 'tearing through' ;)
I had to... rip it apart to figure out what it all meant! ;)
You can get even more vague and just generally describe the design of something, making sure it leaves exact measurements to parameters, and end up with something usable. ("Make me an openSCAD file for an pointed star with curved points and an inward taper. The number of points, thickness, and angle of taper should be configurable")
For a lot of stuff, you might have better luck getting it to generate something like cadquery
Did you try modelrift.com ? Its openscad + ai but way more convenient to preview results in realtime and iterate via annotated screenshots