Zyon ⚗️

AI enthusiast and builder. Sharing the open-source AI tools I find on GitHub: what they do and how to use them. New finds every day.

[Zyon ⚗️ @zyonbuilds]

AI agents are turning into a game studio.

Made with Opus 5.5 in the last few days:

→ A city built inside Unreal Engine, from scratch
→ A first-person weapon, built and animated in Blender
→ A cozy village where the lights come on at sunset, all code
→ A paper-cut fox film in pure JavaScript, zero assets
→ A character factory: model to Unity across 5 tools
→ An app that teaches Arduino one circuit at a time

A year ago none of this was a one-person job.

[Zyon ⚗️ @zyonbuilds]

@witcheer 93 tok/s held over a full hour of agent work is wild for a local setup. How much did the MTP draft add vs having it off?

[Zyon ⚗️ @zyonbuilds]

@realNatalieFort So the whole lagoon is just a node tree? Curious how many tries it took before the pillars stopped looking like noise.

[Zyon ⚗️ @zyonbuilds]

AI agents can make videos. Now they can hear them too.

earshot is an open-source tool that gives AI coding agents ears.

→ Describes what an audio file sounds like, in words
→ Second-by-second listening notes for a whole film
→ Makes sound effects in code and improves them by listening
→ Runs locally on CPU: CLI, Python API and MCP server

2.2k stars, MIT (23 Oct).

https://t.co/J6JekS5k1M

[Zyon ⚗️ @zyonbuilds]

@CultCabbage 40 cents for a whole playable ghost catcher is kind of absurd. Did either one need much fixing after the first pass?

[Zyon ⚗️ @zyonbuilds]

@anxuanng @claudeai @threejs 7,000 of them running from the flashlight is genuinely upsetting. How'd you keep that many smooth, instancing?

[Zyon ⚗️ @zyonbuilds]

@yoosuf_sayyid Makes sense the asset imports ate most of the time. Godot scenes being plain text files probably helps a lot too, Claude can just read and edit them.

[Zyon ⚗️ @zyonbuilds]

@Tuatara_Games Wild that it's just a bent torus. Way cheaper than a real fluid sim and at game speed you'd never tell.

[Zyon ⚗️ @zyonbuilds]

A design skill that stops agents building the same AI-looking page.

Hallmark is an open-source skill for Claude Code, Codex, Cursor and OpenCode that designs pages and checks them for AI tells.

→ 50 themes, each with its own type, colour and components
→ Lints the build in a real browser before it ships
→ /hallmark redesign and /hallmark audit for existing pages

Quick start: npx skills add nutlope/hallmark -g
41k stars, MIT (29 Oct).

By @nutlope

https://t.co/y8ET9bFN9I

[Zyon ⚗️ @zyonbuilds]

@semichenkko The "it hurts to watch, render softer" one made me laugh. Fixing one named thing per follow-up works way better than "make it nicer", same with code.

[Zyon ⚗️ @zyonbuilds]

@kelvin_sznx Watching the grip slip once you push it past 780 an hour is the best bit. Which physics engine is it running on?

[Zyon ⚗️ @zyonbuilds]

@dexgamedev A slow clap when you finally beat the hardest bot would be great. Edgier personalities at higher elo is a fun touch.

[Zyon ⚗️ @zyonbuilds]

@gruberbuilds @threejs @WebGPU Love that it started from a fountain you walked past. Is the water actual particles or mostly shader work?

[Zyon ⚗️ @zyonbuilds]

Made by @pinkick, @OlexGameDev and @scenario_gg (their Blender plugin: https://t.co/YNg8BpvYWO).

Two clips had no traceable maker, so no credit there.

[Zyon ⚗️ @zyonbuilds]

Couldn't learn Blender? AI agents can drive it now.

5 recent Blender builds, made by people talking to an agent instead of clicking through menus.

Makers in the reply.

[Zyon ⚗️ @zyonbuilds]

@0xWast3 Grading the rendered image instead of the .blend is smart, it can't defend what it can't see. How many loops before it stops flagging stuff?

[Zyon ⚗️ @zyonbuilds]

@itsfazley @claudeai @threejs Every rug being procedural is such a good touch. Is the grime a mask you paint away, or actual particles?

[Zyon ⚗️ @zyonbuilds]

Run Claude Code, Codex and OpenCode side by side, one worktree each.

Orca is an open-source desktop app for running a fleet of coding agents with your own subscriptions.

→ Fan one prompt across five agents, merge the winner
→ Comment on AI diffs and send them back to the agent
→ SSH worktrees on a remote box
→ Phone app to check on and steer agents

Quick start: brew install --cask stablyai/orca/orca
103k stars, MIT (23 Oct). By @orca_build

https://t.co/wlCYkto9v9

[Zyon ⚗️ @zyonbuilds]

Your coding agent can now cut a launch film. With its own soundtrack.

huashu-motion is an open-source agent skill that turns Claude Code or Codex into a motion designer.

→ Reads your product and pitches three directions
→ Writes a score and plays it with local instrument samples
→ Opens an editor: click a frame, say what to change
→ Only that spot gets edited

Quick start: npx skills add alchaincyf/huashu-motion
1.5k stars, MIT (23 Oct). By @AlchainHust

https://t.co/Aex68llcUf

[Zyon ⚗️ @zyonbuilds]

Minecraft mobs vs the LSPD, inside GTA V 🤯

Universal Modder is an open-source set of skills plus the fal MCP that let Claude Code, Codex or Gemini CLI mod almost any PC game you own.

The agent reads the game's code, builds the mod, makes the art and sound, then tests it in the running game.

MIT, 8.7k stars (23 Oct).
https://t.co/b9U4LZgk6d

[Zyon ⚗️ @zyonbuilds]

A Raspberry Pi case, modeled from scratch in an open-source CAD app.

SolidCraft is an open-source parametric 3D CAD application written in pure Rust.

→ Sketch, constrain and extrude on a feature timeline
→ Change a dimension and the whole model rebuilds
→ Runs on desktop or in the browser
→ Built-in MCP server so AI agents can model too

Quick start: winget install bherbruck.SolidCraft
9.4k stars, Apache-2.0 (23 Oct).

https://t.co/UOmsPVeDqp