⚙ Text-to-CAD Harness

Skill by ara.so — Daily 2026 Skills collection.

An open source harness that lets AI coding agents (Claude Code, Codex, Cursor, etc.) generate, export, and preview 3D CAD models from natural language descriptions. Models are written in Python using build123d on top of OpenCascade (OCP), exported to STEP/STL/DXF/GLB/URDF, and inspected in a local React/Vite CAD Explorer viewer.

How It Works

User prompt → Agent edits models/*.py → Python skill regenerates artifacts → Viewer previews geometry

• models/ — Source-controlled Python CAD files (build123d scripts)
• skills/cad/ — Bundled CAD skill (STEP, STL, DXF, GLB, snapshots, @cad[...] references)
• skills/urdf/ — Bundled URDF skill (robot links, joints, validation)
• viewer/ — Local React/Vite CAD Explorer (no backend required)