Jklient
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Install

<jklient> a loader and three jars. you've done harder things for a texture pack.

  1. Fabric for 26.3

    Run the Fabric installer and pick Minecraft 26.3 with Loader 0.19.5 or newer. In Prism Launcher: Add Instance, version 26.3, Mod loader Fabric.

    26.3 runs on Java 25. The official launcher and Prism download it for you.

  2. Fabric API

    Download the 26.3 build of Fabric API into your mods folder.

    [Windows] %appdata%\.minecraft\mods

    [macOS] ~/Library/Application Support/minecraft/mods

    [Linux] ~/.minecraft/mods

    Prism keeps one per instance: right-click it, Folder, then minecraft/mods.

  3. Jklient

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    Downloads are for subscribers.

  4. Baritone optional

    Adds the Baritone tab to the menu, .b commands and the Baritone Status HUD. There's no official Baritone for 26.3 yet, so this is the build Jklient is compiled against.

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    Downloads are for subscribers.

    Built from robotum1/baritone at d9c4b8dd8b, licensed under the LGPL-3.0.

  5. Start the game

    Log in with the Minecraft account you applied with. Jklient checks it with Mojang and unlocks itself; press both Shift keys for the menu.

    Still locked? Check your application, then click Check again on the Jklient screen in the title menu.