There is actually, though I suspect it's a different one I found.

https://github.com/jopdorp/build123d-freecad (it also supports cadquery)

Set it up today and I am really liking build123d in general. I've always wanted something code-based for CAD and I can't believe I missed something this promising.

Frankly even the visualization tools that you can plugin like OCP Cad viewer mean that outside of complex assemblies you can do everything in your editor of choice.

I'm playing with this now too and it's really wonderful. I'm hoping that I can use build123d 100% for modelling individual parts and then FreeCAD for assemblies, simulations, etc.

not really. cadquery started as a freecad workbench, but moved out a long while ago. So current cadquery isn't usable inside freecad (which is a shame).

also worth a look: build123d

Yeah, I found it much more interesting when it was in FreeCAD --- wish there was some nice, graphical alternative (something like Grasshopper).

I just learned about build123d from another comment here, very excited to try it out!