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README.md

Demo of the text-to-cad harness generating and previewing CAD geometry

⚙ Open Source Text to CAD Harness ⚙

An open source harness for generating 3D models with your favorite coding agent

GitHub stars GitHub forks License: MIT Follow @soft_servo Python build123d OCP STEP STL URDF Node.js React Vite

✨ Features

  • Generate - Create source-controlled CAD models with coding agents like Codex and Claude Code.
  • Export - Produce STEP, STL, DXF, GLB, topology data, and URDF robot descriptions.
  • Browse - Inspect generated geometry in a local CAD Explorer viewer.
  • Reference - Copy stable @cad[...] references so agents can make precise follow-up edits.
  • Review - Render quick snapshots for fast checks during an iteration loop.
  • Reproduce - Edit source files first, then regenerate explicit targets.
  • Local - Run the harness and viewer locally with no backend to host.

🧰 Bundled Skills

This harness vendors file-targeted skills for CAD and robot-description work. Use the bundled copies here for local models/ projects, or use the dedicated repositories when installing the skills outside this harness.

🔁 Workflow

  1. Describe - Tell your agent about the part, assembly, fixture, robot, or mechanism you want.
  2. Edit - Let your coding agent update CAD source files under models/.
  3. Regenerate - Create explicit STEP, STL, DXF, GLB, or URDF targets.
  4. Inspect - Open the CAD Explorer viewer to review the generated model.
  5. Reference - Copy @cad[...] handles when you want geometry-aware edits.
  6. Commit - Save the source and generated artifacts together once the model is ready.

🚀 Quick Start

Clone the repo:

git clone https://github.com/earthtojake/text-to-cad.git
cd text-to-cad

Install Python CAD dependencies:

python3.11 -m venv .venv
./.venv/bin/python -m pip install --upgrade pip
./.venv/bin/pip install -r requirements-cad.txt

Install viewer dependencies:

cd viewer
npm install

Run the local CAD Explorer:

npm run dev

Then open http://localhost:4178.