Open source parametric CAD

I've been using Claude Opus 5.5 build a parametric CAD for 2 weeks now. The interface has focus on user-friendliness and is fairly Fusion inspired. The kernel is a novel approach which uses rational quadratic triangle patches to enable manifold solids, and it can export manifold 3MF. Both were co-designed by me and Claude Opus. It has 2D sketches with constraints. Kernel features are quite limited still with extrude, revolve and combine supported, though not in all cases. I think the direction of having proper manifold solids is promising though. It's accessible as a web app at zoxc.github.io/varde . I wouldn't mind some feedback on the user interface and sketching functions.