Ukulib compatibility depends on the complete mod environment. This guide organizes the Minecraft version, loader family, library release, and dependent-mod requirement into one repeatable check so users can avoid mismatched files.
Three values must match
Compatibility is a three-part check: Minecraft version, mod loader, and the dependent mod’s Ukulib requirement. A file may have the correct loader but target a different Minecraft release. Another file may match Minecraft but use an older library API than the feature mod expects. Treat all three values as mandatory.
Fabric and Quilt profiles
Ukulib has releases listed for Fabric and Quilt across many Minecraft branches. Quilt can often run Fabric ecosystem mods, but users should still follow the release metadata. A modpack that already launches correctly should not be changed from one loader to another merely to satisfy a single dependency.
NeoForge support in Ukulib 2
The Ukulib 2.0 release introduced support for both Fabric and NeoForge in the modern 26.1 line. It also changed development artifacts and removed deprecated code. For players, the practical rule is simple: use the NeoForge release only in a compatible NeoForge profile. For developers, consult the current documentation before migrating an integration.
Older Minecraft branches
Project listings include older Minecraft versions, but older releases can have different loader support and APIs. Do not use the latest 2.x file in a 1.20.1 or 1.19.x profile unless the release specifically targets that game version. Search by the exact Minecraft version and verify the filename and metadata.
A repeatable compatibility checklist
Write down the instance version, loader version, dependent mod version, and requested Ukulib range. Remove duplicate library files, keep a profile backup, and change one component at a time. This method makes rollback easier and prevents a misleading chain of errors caused by several simultaneous updates.