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LibJF Mod for Minecraft 26.3

A library for my mods

On a server
downloads
11 downloads
views
54 views
Updated
Updated 21.09.2026

About the LibJF mod

LibJF is a library for my smaller mods which contains several common components. Namely it provides:

  • a complete config system with UIs, commands, compile-time codegen, presets, verifiers, etc
  • a framework for manipulating loaded data and resources
  • two new tags (which you can also use in data packs):
  • libjf:overpowered: if an entity only wears armor items with this tag, it will become invulnerable
  • libjf:shulker_boxes_illegal: items with this tag cannot be placed inside shulker boxes.

Intended to be used for backpacks or similar items

  • utility code for serialization, script loading, co-processes, IO, etc.
  • network utilities including a HTTP client and server
  • a configurable and extensible translation system supporting various providers
  • utilities for early initialization and ASM patching

If a mod is made by me, it is generally safe to assume it requires LibJF (or ships with parts of it)

If you want to use LibJF yourself, you can find documentation here

How to install LibJF

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 26.1.2–26.3 on Fabric or NeoForge automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Install Fabric or NeoForge

    The loader must match the game version of the mod file, for example Minecraft 26.3. After installing it, a separate profile appears in your launcher.

  2. Download the file for your version

    In the version list above, pick the file libjf-26.3.1+forge.jar (1.1 MB) for your game version and loader.

  3. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.

  4. Launch the loader profile

    Open “Mods” in the main menu: LibJF should be in the list.

On a server

  1. A server on Fabric or NeoForge

    The mod only works on a server with the same loader and game version, for example 26.3.

  2. File goes into the server’s mods folder

    Stop the server, put the mod file into the mods folder and start the server again.

  3. Or use the “To hosting” button

    On Millida Hosting, the button at the top of the page uploads the file to your server and restarts it for you.

Versions

With dependencies

MinecraftLoaderFileDateActions
26.3NeoForge26.31.1 MB 1
26.3Fabric26.31.6 MB 6
26.3NeoForge26.3913 KB
26.3Fabric26.31.5 MB
26.2NeoForge26.2903 KB
26.2Fabric26.21.4 MB 3
26.1.2Fabric26.1.21.4 MB
26.1.2NeoForge26.1.2902 KB

What it needs to run

FAQ

Which Minecraft versions does LibJF work on?

There are files for 26.3, 26.2, 26.1.2. The newest is 26.3.

Is LibJF for Forge or Fabric?

There are files for Fabric: 26.1.2–26.3 and for NeoForge: 26.1.2–26.3. There are no files for Forge: a mod for another loader will not start.

Does LibJF need other mods?

The author lists no required dependencies: the Fabric or NeoForge loader is enough.

Does LibJF work on a server?

Yes. LibJF works both in singleplayer and on a server.

Where can I download LibJF safely?

On this page: the file libjf-26.3.1+forge.jar (1.1 MB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: cd1662c3ab0719a1a0e651bbbd9d268b2b68454d.

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Author: JFronnyLicense: LGPL-3.0-or-laterSource code

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