What this skill does

# CAD Agent > Give your AI agent eyes for CAD work. ## Description CAD Agent is a rendering server that lets AI agents see what they're building. Send modeling commands → receive rendered images → iterate visually. **Use when:** designing 3D-printable parts, parametric CAD, mechanical design, build123d modeling ## Architecture **Critical:** All CAD logic runs inside the container. You (the agent) only: 1. Send commands via HTTP 2. View the returned images 3. Decide what to do next ``` YOU (agent) CAD AGENT CONTAINER ───────────── ─────────────────── Send build123d code → Executes modeling ← Returns JSON status Request render → VTK renders the model ← Returns PNG image *Look at the image* Decide: iterate or done ``` **Never** do STL manipulation, mesh processing, or rendering outside the container. The container handles everything — you just command and observe. ## Setup ### 1. Clone the Repository ```bash git clone https://github.com/clawd-maf/cad-agent.git cd cad-agent ``` ### 2. Build the Docker Image ```bash docker build -t cad-agent:latest . ``` Or using docker-compose: ```bash docker-compose build ``` ### 3. Run the Server ```bash # Using docker-compose (recommended) docker-compose up -d # Or using docker directly docker run -d --name cad-agent -p 8123:8123 cad-agent:latest serve ``` ### 4. Verify Installation ```bash curl http://localhost:8123/health # Should return: {"status": "healthy", ...} ``` > **Docker-in-Docker caveat:** In nested container environments (e.g., Clawdbot sandbox), host networking may not work—`curl localhost:8123` will fail even though the server binds to `0.0.0.0:8123`. Use `docker exec cad-agent python3 -c "..."` commands instead. On a normal Docker host, localhost access works fine. ## Workflow ### 1. Create Model ```bash curl -X POST http://localhost:8123/model/create \ -H "Content-Type: application/json" \ -d '{ "name": "my_part", "code": "from build123d import *\nresult = Box(60, 40, 30)" }' ``` ### 2. Render & View ```bash # Get multi-view (front/right/top/iso) curl -X POST http://localhost:8123/render/multiview \ -d '{"model_name": "my_part"}' -o views.png # Or 3D isometric curl -X POST http://localhost:8123/render/3d \ -d '{"model_name": "my_part", "view": "isometric"}' -o iso.png ``` **Look at the image.** Does it look right? If not, modify and re-render. ### 3. Iterate ```bash curl -X POST http://localhost:8123/model/modify \ -d '{ "name": "my_part", "code": "result = result - Cylinder(5, 50).locate(Pos(20, 10, 0))" }' # Re-render to check curl -X POST http://localhost:8123/render/3d \ -d '{"model_name": "my_part"}' -o updated.png ``` ### 4. Export ```bash curl -X POST http://localhost:8123/export \ -d '{"model_name": "my_part", "format": "stl"}' -o part.stl ``` ## Endpoints | Endpoint | What it does | |----------|--------------| | `POST /model/create` | Run build123d code, create model | | `POST /model/modify` | Modify existing model | | `GET /model/list` | List models in session | | `GET /model/{name}/measure` | Get dimensions | | `POST /render/3d` | 3D shaded render (VTK) | | `POST /render/2d` | 2D technical drawing | | `POST /render/multiview` | 4-view composite | | `POST /export` | Export STL/STEP/3MF | | `POST /analyze/printability` | Check if printable | ## build123d Cheatsheet ```python from build123d import * # Primitives Box(width, depth, height) Cylinder(radius, height) Sphere(radius) # Boolean a + b # union a - b # subtract a & b # intersect # Position part.locate(Pos(x, y, z)) part.rotate(Axis.Z, 45) # Edges fillet(part.edges(), radius) chamfer(part.edges(), length) ``` ## Important - **Don't bypass the container.** No matplotlib, no external STL libraries, no mesh hacking. - **Renders are your eyes.** Always request a render after changes. - **Iterate visually.** The whole point is you can see what you're building. ## Design File Safety The project has safeguards against accidentally committing CAD outputs: - `.gitignore` blocks *.stl, *.step, *.3mf, etc. - Pre-commit hook rejects design files - User's designs stay local, never versioned ## Links - [Repository](https://github.com/clawd-maf/cad-agent) - [build123d docs](https://build123d.readthedocs.io/) - [VTK](https://vtk.org/)