Agentcad Skill Release 0.4.0
AI Agent Tool for 3D CAD Modeling
Install & Use
Copy this prompt and send it to your AI assistant (Claude / Cursor / TRAE / Codex / WorkBuddy etc.) to auto-install:
Help me install this AI Skill: Agentcad Skill Release 0.4.0. It is used for: AI Agent Tool for 3D CAD Modeling Full Skill content: https://321skill.com/skills/agentcad-skill-release-0-4-0-x-3/raw/index.md Read that page and install it.
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This Skill addresses the inability of AI agents to perform 3D modeling directly. In practical development, when users need to design, modify, or analyze 3D objects, traditional CAD software requires manual operation, while AI agents lack direct modeling capabilities. Agentcad enables AI agents to automatically generate Python scripts for build123d or CadQuery based on natural language instructions, execute them to produce 3D model files in formats like STEP, STL, and GLB, and simultaneously output preview images and geometric measurement data.
Usage is straightforward: simply install agentcad (pip install agentcad) in your AI agent environment, then describe your 3D design requirements. The AI agent will first write a Python script, then check the script's geometric metrics (volume, dimensions, validity) in dry-run mode before formally executing it to generate the model. Each run automatically produces a four-view preview (front, right, top, isometric) and a comparison image with the previous version, facilitating iterative adjustments. If issues arise with the model, you can use the inspect command to examine the STEP file or the measure command to measure specific feature dimensions.
It is particularly suitable for designers, product managers, and agent developers who frequently engage in 3D modeling—especially teams already using AI coding assistants (like Claude or Cursor) for development but lacking direct 3D model generation capabilities. With Agentcad, even non-CAD experts can quickly create product prototypes, mechanical parts, or architectural models via natural language, outputting them in industry-standard formats for 3D printing or further processing.
We recommend consistently using this tool when rapid validation of product concepts or iterative design is needed. Note that it primarily relies on Python 3.10–3.12 environments and requires installation of the build123d or CadQuery libraries. Scripts must include a show_object() call to output results; dry-run mode efficiently prevents invalid iterations. For complex assemblies or surface modeling, it is currently still advisable to combine with professional CAD software.
Key Features
Compared to traditional CAD software like Fusion 360, Agentcad is driven by natural language through AI agents, eliminating the need for manual modeling. Compared to programming directly with build123d, it provides a complete workflow including dry-run previews, version comparisons, automatic rendering, and feature measurement, significantly lowering the barrier to entry.
Limitations
Requires a Python 3.10–3.12 environment and installation of the agentcad package (`pip install agentcad`), with dependencies on build123d or CadQuery. Scripts must include a `show_object()` call; otherwise, no results will be output.
FAQ
How do I install Agentcad?
Simply run `pip install agentcad`. Ensure your Python version is between 3.10 and 3.12.
Which 3D output formats are supported?
It supports formats like STEP, STL, GLB, and OBJ, while also generating PNG previews and an interactive HTML viewer.
Installation guide for AI assistants
If your AI coding assistant (Claude Code, Cursor, TRAE etc.) can see this page, send it this message to auto-install:
Visit https://321skill.com/skills/agentcad-skill-release-0-4-0-x-3/raw/index.md to read the original Skill definition (Markdown format) for Agentcad Skill Release 0.4.0, and install it according to the instructions.
Raw Markdown URL for AI: /skills/agentcad-skill-release-0-4-0-x-3/raw/index.md