Features of universal-modder:

• search the knowledge base;
• recon, then pick a route;
• set up a safe lab (saves backed up);
• read the actual code;
• build one working slice;
• generate assets;
• verify in the real game;
• record;
• package;
• write a field note for the next agent.
• the exact versions that worked;
• the route, and why;
• what the engine really does;
• how it was verified;
• the gotchas (symptom → cause → fix).
• [Portalcraft: real Minecraft inside Portal 2](knowledge/games/portal-2/portalcraft-minecraft-inside-portal-2.md)
• [Halo 3 weapons, Covenant, vehicles and maps ported into Minecraft](knowledge/games/halo-3-mcc/halo-3-weapons-covenant-vehicles-and-maps-ported-into-minecr.md)
• [Bloons TD 6 inside Minecraft, with the game's rules as a headless sim](knowledge/games/minecraft/bloons-td-6-in-minecraft.md)
• [A CS2-style conversion of Elden Ring offline, as a native Rust DLL](knowledge/games/elden-ring/cs2-conversion-of-elden-ring-offline-native-rust-dll-via-me3.md)
• [examples/terraria-tmodloader](examples/terraria-tmodloader): *Fal Arsenal* for tModLoader.
• Weapons: a homing missile launcher, a tactical nuke (crater + mushroom cloud), a chain-lightning rifle, a
• Three new enemies and a two-phase Drone Mothership boss.
• Every sprite came from fal.
• [examples/aoe2-de-civ](examples/aoe2-de-civ): *San Franciscans* for Age of Empires II DE.
• A new civilization with a Robotaxi unique unit and Delivery Drones, rendered from fal image-to-3D models
• A Transamerica Pyramid wonder.
• A reverse-engineered .sld sprite writer.
• [examples/minecraft-gta5-passthrough](examples/minecraft-gta5-passthrough): real Minecraft inside
• A Fabric mod and a ScriptHookV + ReShade add-on exchange camera, ground and events over a local
• Minecraft's colour + depth are depth-composited into GTA's frame.
• Minecraft TNT, arrows and fireworks become GTA explosions and bullets, and Minecraft mobs fight the
• Any game you own: single-player, multiplayer, or servers you host. It refuses to inject into online
• It never ships game files or decompiled code. Mods ship as code, your own assets, patches or
• It backs up before touching saves, and kills processes by PID only.
• It asks before driving your mouse and keyboard, installing loaders into game folders, or publishing,
• Built from real agent sessions modding Terraria, Age of Empires II and GTA V × Minecraft.
• Assets: [fal](https://fal.ai) (GPT Image 2, Nano Banana 2, FLUX, Trellis 2, ElevenLabs...).
• Standing on the shoulders of tModLoader, genieutils-py, AoE2ScenarioParser, ScriptHookV, ReShade, Fabric,
• The engine playbooks also draw on the September 2026 wave of AI-built mods, and on how their creators