MobLiB

MobLiB is a library rather than a gameplay mod, and it provides the framework that dependent mods rely on. Its own gameplay features are limited, although regular players can use it to change gameplay directly. Installing it is required before MobPvP or any other mod that depends on it will run.

The library bundles utilities for developers, including mod paths, version management, an automatic version generator, beta testing update control and build code support for blocks and items. Modpack creators can use it to improve stability and make dependent mods easier to integrate. Client and server both need it, so it has to be installed on every player's game and on the server.

MobLiB is published for Fabric and Quilt, with files for 1.21 and 1.21.1 and the latest build 1.5-build.2 for 1.21.1 dated 2025-11-09. It was first published on 2025-09-07 and is released under a custom license that is not open source, with source code available publicly.