As of about a month ago there’s https://github.com/soapantelope/mindcraft. You can give it a prompt like “A Minecraft world of beautiful flower-filled meadows abruptly changing into swamps.” and get that. As far as I can tell it’s using Minecraft’s existing world generator, the readme notes “As of now, Mindcraft can only generate worlds that are feasible natural overworld biomes in Minecraft 1.21.11. Keep this in mind when thinking of prompts!”.

And I’ve seen people hook up LLMs more directly with some scripting tools to place blocks/spawn entities, they do okay.

There are mods that affect world generation, so I guess it should be possible to write a mod that exposes that functionality to an AI agent.

a world has a seed as well, so when you walked past the generated portion it would start randomly generating from that seed, which wouldn't match the portion that was sculpted

you would have to make the AI search for seeds that generate what you want at the starting point I think

If the AI could understand the save file format for Minecraft, it could manipulate that

There are methods to do custom generation in of itself, so should be possible for AI to write a mod in the same vein as current world generation mods.

I play heavily modded Minecraft and have always dreaded endgame where you're often building out massive infrastructure. Would be amazing to have a little embedded ChatGPT that could generate modded structures with a prompt. The factory must grow :)