SolveCraft: open-source Fusion 360-style CAD in Rust that AI agents can drive

SolveCraft is a new open-source parametric 3D CAD app, written in Rust under the MIT or Apache 2.0 licence, at your option, that aims to be a clean-room reimplementation of Autodesk Fusion 360. You sketch, add constraints and dimensions, and build solids on a feature timeline; change a parameter and the model rebuilds. It runs on desktop or in the browser, exports to STEP, IGES, 3MF, STL and OBJ, and imports STEP and IGES. It includes an MCP server, so AI agents such as Claude Code can build, measure and screenshot parts, either headless or in the running app while you watch. The README's demo shows an agent building an electronics enclosure, then the width changed from 80 to 100 mm and the model rebuilding. The developer calls it "early but usable for simple parts" and says all 76 reference parts built in Fusion rebuild with the same volume, area and topology.