The sentence I would read first in the solidcraft README is a status line. It says the project is early but usable for simple parts, that 75 of 76 public reference parts match their analytic or FreeCAD-computed volume, area, centre of mass and bounding box, and that the remaining one is a tracked bug. Then it adds that these checks do not establish complete geometric or workflow equivalence. That sets clear limits on what the reported checks establish.

SolidCraft is an open-source parametric 3D CAD application written in pure Rust under Apache-2.0. You sketch, constrain and build solids on a feature timeline, change a dimension, and the model rebuilds. It runs on the desktop, in the browser, and through a built-in MCP server that lets AI agents do the modeling.

An agent built a rover through MCP

The README's showcase is SELENE, a scientific rover it says was built entirely through SolidCraft's MCP server by @0xlillith: 3,323 editable timeline steps that rebuild with no errors.…