File Name- Ui-utils-mod-fabric-1.21.jar

Add it as a modImplementation dependency in your build.gradle :

It explicitly identifies this file as a modification for Minecraft Java Edition, distinguishing it from configuration files, plugins (Bukkit/Spigot), or data packs. File name- UI-Utils-Mod-Fabric-1.21.jar

The file is a utility mod for Minecraft Java Edition (Fabric loader) primarily used for debugging server GUIs , testing plugin vulnerabilities, and "dupe hunting" (finding duplication exploits). Developed by Coderx-Gamer and MrBreakNFix, it adds advanced packet-level control to in-game menus like chests and inventory screens. Key Features Add it as a modImplementation dependency in your build