About this 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 invulnerablelibjf: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
Available Versions
How to Install LibJF on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.2).
Install Mod
Open the mod browser in the dashboard and search for "LibJF". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.2, 26.1.2, 26.1.1 (+31 more)
Server-side
~ OptionalRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
LibJF server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.2). You can switch loaders with one click in the panel.
Is LibJF compatible with fabric and neoforge?
LibJF officially supports fabric, neoforge for Minecraft 26.2, 26.1.2, 26.1.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with LibJF – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if LibJF consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install LibJF with just one click on your server.