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Lib 39

Lib39 is a general-purpose dependency library for Minecraft mods.

FabricNeoForgeForge
Loaders
FabricNeoForgeForge
Downloads on Modrinth
20.6K
Followers on Modrinth
3
versions
8
Updated
April 19, 2026Apr 19
Published
in 2025
This is a library — other mods need it, and it adds nothing to the game by itself

At a glance

A library: other mods need it
Runs on Fabric, NeoForge and Forge
For Minecraft 1.20.1, 1.21.10–1.21.11
Needed in the game and on the server
Latest version — 1.20.1-0.5.6 from April 19, 2026
License MIT — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.20.1, 1.21.10–1.21.11

A LIB

Current Library Features

  • S2C Synchronized Data System (Not only supports Capability but also enables synchronization of more data types through DataProvider)
  • I18n Language JSON Data Generation Code based on Provider (providing more convenient language data generation)
  • Compatibility Code Registration Management Class (for easier compatibility with other mods)
  • NBT Read/Write Utility Class using a chain pattern to reduce redundant serialization/deserialization logic
  • A Series of Riding Methods for more convenient management of riding relationships
    ...and a range of other utility methods aimed at reducing repetitive coding tasks.

For Developers

Add the Maven repository in your build.gradle:

repositories {
    maven {
        name = "LTD Maven"
        url = "https://nexus.bot.leisuretimedock.top/repository/maven-public/"
    }
}

Import the dependency:

implementation 'top.r3944realms.lib39:lib39:${version}'

Version examples like 1.20.1-0.0.17:

implementation 'top.r3944realms.lib39:lib39:1.20.1-0.0.17'

After building, this mod can be found in the library with examples included.

Click "Download Source Code" in the right-hand window to view JavaDoc annotations.

FAQ

How to install Lib 39?

Install Fabric for your Minecraft version, download Lib 39 for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Lib 39 support?

Lib 39 has builds for Minecraft 1.20.1, 1.21.10–1.21.11.

Is Lib 39 needed on the server?

Needed in the game and on the server

License and source
MIT Licensefree to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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