I made a Minecraft server plugin to prompt agents to build in the world using the existing terrain as specs

[u/Acclynn]

This mod is basically WorldEdit but with AI : First off you select your region (by picking two corners or just by looking where you want your structure to be), then you prompt in a chat command. That prompt is sent to the agent along with the selected region, who has a simulation to work in, then the agent work in the background then deliver its result and you get a reconstitution of what it did.

You can even use books in lecterns to give additional spatial context.

It is incredibly good at following precise instructions, so I think it can be more than just something to toy with and may be an actual reliable tool for builders who want to complete side-stuff.

The way it works is that the mod is calling a separate program running on the system (called the "core") which handles connecting to your Claude or Codex CLI, you even have a nice UI to configure everything from it (what AI provider, what model, effort etc).

The mod is purely server-side, so you can even toy with it in multiplayer and your friends don't need to install anything as long as the host have it.

Vibe-coded with GPT-6 Astra when it was still good, then I pivoted to Claude Opus 5.5, I still took some decisions for the overall architecture and API tho. I also care about having something clean, shareable and that doesn't feel janky. The design and ideas are from me.

Despite having to install two things to install to make it work (the Core program and the mod itself) I hope it's easy enough to pick up.

Fully open-source and forkable : https://github.com/Ni-Cobra/worldprompt

Showcase video : https://www.youtube.com/watch?v=1TMD-y_XeXk

[u/check0790]

Pretty cool and it is very neat for just getting that itch scratched but I couldn't help myself

[u/North_Potential_4713]

This is so cool!

[u/anarchist1312161]

Looks good, but is it possible to have OpenCode integration alongside Claude Code and Codex? Also perhaps possible to just have it connect to an OpenAI-style API endpoint?

[u/EchoStarz1]

Very impressive but doesn’t this kinda take away the impressiveness of when people would normally do this?

[u/Timzor → u/EchoStarz1]

Its the end of things being impressive

[u/StormMedia → u/EchoStarz1]

Welcome to everything now

[u/Intellect5]

pretty neat, i've always used worldedit. Only downside is this completely kills creativity

[u/AriOTR1868 → u/Intellect5]

it doesn't imo because it won't generate extremely detailed buildings or it doesn't have the human thinking capacity to think of wonderful thins

[u/jfin602]

I'm imagining this as a backbone for a truly "made for you" story system. Imagine completing quests and challenges and your outcome determines how the world is shaped

Edit: Like Yogscast back in the day, except you wouldn't need a team of people to build the story for you

[u/OttoRenner]

turning minecraft into ucraft

(perhaps only funny to Germans: "mine" sounds like the German "mein", which means "my".)

[u/AriOTR1868]

can you make this using an API key or claude for free

[u/CookieArtzz]

Great, it was about time we automated away the core idea of Minecraft. We don’t want to have too much fun around here do we now