build123d

VibeCAD

A library of Claude Code skills for teaching coding agents how to use various CAD tools.

Sponsored by neThing.xyz

Installation

Add the marketplace to Claude Code:

/plugin marketplace add raymondweitekamp/VibeCAD

Then install the plugins you need:

/plugin install build123d@vibecad
/plugin install render-glb@vibecad
/plugin install gltf-transform@vibecad

Using Skills

After installation, invoke skills using the format <plugin-name>:<skill-name>:

Plugin	Skill Invocation
build123d	build123d:build123d
build123d	build123d:model-compare
render-glb	render-glb:render-glb
gltf-transform	gltf-transform:gltf-transform

Skills are automatically triggered when Claude detects relevant tasks (CAD modeling, GLB rendering, model optimization), or you can explicitly load them.

Available Plugins

build123d

Skills for using Build123D - a Python CAD library for creating parametric 3D models with code.

Skills:

• build123d - CAD modeling with algebra-style syntax
• model-compare - Compare 3D models using IoU, Dice, precision/recall metrics

Features:

• Algebra-style syntax for intuitive model creation
• Parametric design patterns
• Export to GLB, STL, STEP, and other formats
• Includes bd_warehouse (threads, fasteners, pipes, flanges, bearings)
• Includes gggears (spur, helical, bevel, planetary, cycloid gears)
• Model comparison for evaluating ML-generated models against gold references

render-glb

Render GLB 3D models to PNG images for visual verification.

• Zero-setup with bunx render-glb model.glb output.png
• Enables agents to see what they build and iterate visually
• Configurable resolution and background color

gltf-transform

Optimize and post-process GLB/glTF 3D models.

• Draco/Meshopt compression for web delivery
• Texture compression (WebP)
• Mesh simplification and welding
• Model inspection and merging

Contributing

We welcome contributions! To add a new CAD tool:

1. Create a new plugin directory under plugins/
2. Add .claude-plugin/plugin.json with the plugin manifest
3. Add skills under skills/ with SKILL.md files
4. Update the marketplace.json to include your plugin
5. Submit a PR

Skill Format

Each skill requires a SKILL.md with YAML frontmatter:

---
name: skill-name
description: What the skill does and when to use it
---

# Skill Name

Instructions for using the skill...

License

MIT License - see LICENSE for details.