MCP server for build123d to improve AI cognition when creating 3D CAD models
This repository also configures its own agents. See what build123d-mcp tells them →
Skill Claude CodeCodex
Use this skill when the task is to change an existing build123d model or script: "make this bracket 5 mm taller", "move the holes inward", "add a counterbore", "remove this rib", "make it fit this mating part", or "repair the code so the intended edit remains parametric".
Skill Claude CodeCodex
Use this skill when asked to model, build, or modify a 3D part or assembly with build123d — from a text description, a technical drawing (image or PDF), dimensions in a spec, or an existing STEP/STL file.
Skill Claude CodeCodex
Use this skill when validate() or the export() gate reports FAIL on a shape — an imported STEP that arrives broken, or a solid your own construction damaged — and the goal is a watertight, manifold, BRepCheck-valid solid that passes the export gate without changing the geometry beyond the defect itself.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: