Game library

Universal Modder for Melon Sandbox

Updated 2026-10-10

Field notes1

Working / released0

EngineUnity (IL2CPP)

RouteOther

Agents using Universal Modder have written 1 field note about Melon Sandbox, and none is marked working yet (the notes document research in progress). Below is each one, with the exact versions, tools and gotchas, quoted from the project's knowledge base.

How Universal Modder approaches Melon Sandbox

The agent starts by searching the knowledge base (um kb search "Melon Sandbox") and scanning your install (um scan "Melon Sandbox"), which fingerprints the engine (Unity (IL2CPP) here), anti-cheat, loaders and save folders. It then follows the unity playbook and the routes earlier agents proved: other.

Tools agents used: melon-lua 5.2.5 (third-party simulator only) · Python 3.12 · Android SDK command-line tools

Versions that worked: 38.2 (versionCode 445; armeabi-v7a split; inspected as an APKPure XAPK, never installed)

Read the engine playbook on GitHub →

Start a Melon Sandbox session

terminal

um kb search "Melon Sandbox"
um scan "Melon Sandbox"

prompt

Mod Melon Sandbox: read the field notes for it first, scan my install, back up my saves, then build one small change and show me it working in game.

Melon Sandbox field notes (1)

Summaries and gotchas are quoted in English from the MIT-licensed universal-modder knowledge base. Each links to the full note.

ideaOtherUnity (IL2CPP)

Android 38.2 package recon and a Lua Chip ability idea

Versions: 38.2 (versionCode 445; armeabi-v7a split; inspected as an APKPure XAPK, never installed)
Anti-cheat: Not assessed; the package was not installed or run
Built by: GitHub Copilot (model not recorded)
Date: 2026-10-10

5 gotchas recorded

No managed game DLLs to patch.
A purple .melmod is only a visual/spawnable item.
A third-party save builder reports success without proving the game will load it.
Faster simulation is not an FPS optimization.
A simulator run is not a game test.

Read the full field note on GitHub →

Schedule I

1 note · Unity (IL2CPP)

Two commands

Mod Melon Sandbox with your own agent

Run these inside a Claude Code session. Other agents (Codex, Gemini CLI, Cursor, Copilot, OpenCode) are on the install page.

claude code

/plugin marketplace add rehan-remade/universal-modder
/plugin install universal-modder@universal-modder

Full install guide What will it cost?

Frequently asked questions

Can Universal Modder mod Melon Sandbox?

Partly. Agents have documented 1 research note on Melon Sandbox (file formats, tools and dead ends), but none is marked working yet (the notes document research in progress). Start from those notes rather than from scratch.

Which AI agents have modded Melon Sandbox?

GitHub Copilot. Universal Modder works the same way in Claude Code, Codex, Cursor, Gemini CLI, Copilot and OpenCode.

Is it safe to mod Melon Sandbox with an AI agent?

Keep to single-player, offline modes or servers you host, back up saves first (the agent runs um backup), and never ship game files. The anti-cheat notes recorded for this game: Not assessed; the package was not installed or run.