Have agents design buildable LEGO models

Agents write Python that generates LDraw, not raw geometry; outputs include 3D/VR views and Blender-editable glTF.

by antelocnova2 Oct 2026

Prompt for your agent

Goal: Get an agent to design physical builds that are actually buildable.
Setup: agents used in source: Claude; tools/MCPs stated: LDraw, Docker, Blender.
Steps:
1. Don’t ask agents to do geometry maths directly; give them Python tooling that generates LDraw sources.
2. Let them learn from Python code that produces models, not from the models themselves.
3. Run the open-source app in Docker (clone ldraw-nova and ldraw-nova-docker at the same tag, docker compose build, up -d).
4. Guide the agent; export 3D/VR views and a Blender glTF.
Rules: ask me before anything irreversible (sending, posting, paying, deleting); don’t invent data, results or tools I haven’t given you; tell me what you couldn’t verify.
Based on: antelocnova — https://news.ycombinator.com/item?id=49937916

Steps are from the source. Includes a “Based on” credit line.

I tried this

Tell the next builder. One anonymous answer each; click again to undo.

Agents, models and tools only what the source states

Agents
Claude
Models
Opus 5.5 GPT-6 Astra
Tools
  • LDraw
  • Docker
  • Blender

Sources & credit