Radon
Radon is a Fabric library that gives other mods a configuration framework, with a config screen class and a Fabric entrypoint for registration.
What it does
Radon provides a configuration library that other mods can build on instead of writing their own settings code. It adds a class that extends ConfigScreen, so a mod can present its options in a screen that follows the same structure. A Fabric entrypoint is declared in the mod's fabric.mod.json, which lets the loader register the configuration code at startup without extra setup by the mod author.
Radon requires Fabric API and works with Mod Menu, which can open its configuration screen from the mods list. Only the client needs it, so servers and players who join them run without it. Files target 1.21 – 1.21.11, and the latest Fabric file is 1.0.0-beta.7+1.21.11, published 2026-03-08 on the beta channel. The code is open source under the GNU General Public License v3.0 only, and the source code and issue tracker are public.
Key features
Configuration library
Provides a reusable configuration system that other mods can use to store and read their options.
Config screen class
Includes a class that extends ConfigScreen, so mods can show their settings in a standard screen.
Fabric entrypoint
Registers its configuration code through a Fabric entrypoint declared in fabric.mod.json.
Mod Menu access
Optional integration with Mod Menu lets players open the configuration screen from the mods list.
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 1
Required by 1 mod
Use cases
Who it’s for: Mod developers who want a ready configuration framework instead of building their own settings handling. Players see it only as a dependency of other mods that use it.
How it compares
Tenreg is a Fabric configuration library for 1.21.11, run on client and server and released under the MIT License. pyke-lib is a Fabric library for 1.20.1 – 26.1.2 that runs on client and server and is licensed under the GNU Lesser General Public License v3.0 only. Radon covers 1.21 – 1.21.11 and runs on the client alone.
Questions
Does Radon need Fabric API?
Does a server need Radon installed?
Which mods require Radon?
In the catalog
Radon is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
This mod is a very easily usable configuration library.
Official listing
- Modrinth page
- modrinth.com/mod/radon-lib
- Owner
- Kitty on Ketamine
- Published
- 2026-02-21
- Updated on Modrinth
- 2026-03-08
- Facts verified
- 2026-10-15