ldraw-nova - Agent tooling for generative LEGO models

Show HN: Made an open-source Lego AI generator

ldraw-nova - Agent tooling for generative LEGO models

ldraw-nova is an open-source tool that lets AI agents design buildable LEGO models. Give an agent a prompt, and it plans, iteratively renders, and adjusts until it produces LDraw source code, a Blender-editable glTF file, and interactive 3D views. Powered by GPT-6 Astra and Claude Opus 5.5, it uses semantic search with re-ranking to find suitable parts and examples. Run it via Docker to generate physical, buildable LEGO creations from simple ideas.

I did this in order to get agentic LLMs capable of designing buildable, physical things!

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2026-10-02