Hi there :-) New on HN, first time posting. Past year, around December, I started experimenting with making ChatGPT and Claude generate source code in LDraw language. This LDraw is literally an "assembly" language, a low-level programming language that describes how to assemble LEGO pieces together into models, one placement instruction at a time. When executed by specific tools, like e.g. LDView, LeoCAD, Studio... these instructions become LEGO CAD models, that can be interacted with, modified, etc. Or, in other words: one LDraw source file in .mpd or .ldr format is equivalent to one LEGO CAD model.
So, the idea I had was: if I manage for maybe ChatGPT or Claude to generate high-quality LDraw source files... then, they would actually be generating high-quality LEGO CAD models, right? Then, after months of iterations and trying one thing after the other... it worked!!! Long story short: using GPT-6 Astra and Opus 5.5, I've managed to create a python toolset, instructions, and docs for agents in general. Now, these can be used by them to generate LDraw models.
I've packed it all as a dockerized web app for others to try and experiment, with several providers (and agents) to choose from: OpenAI, Claude and OpenRouter. Give an AI agent a model idea. Guide it, let it build it, and get an LDraw LEGO© model. What you get when the building process finishes: Its source code, in LDraw language. Different views: 3D viewer, 3D player, VR interactive (Meta Quest 3), images... Blender editable gl TF file, in .glb format, metainfo as Blender's Custom Properties. Chat history and agent thinking process.
I'd really appreciate feedback and comments, let's see where this goes =)
Source: Hacker News · Summarized by HeadlinesBriefing