Jumploader

fJumploader is a mod that supports Fabric modpack exportation on CurseForge and Fabric mods on the CurseForge launcher with any existing or newly created profiles. It is applicable for Minecraft versions 1.14–1.16.4. It does not support Legacy Fabric.

Before Jumploader, there was only an unofficial method known as the "Vanilla to Twitch" method that specifically required files from the .fabric and .mixin.out folders, along with the Fabric Loader version from the Mojang launcher Fabric installation to be carried over to Twitch (before the feature was removed) and CurseForge Launchers. It did not allow modpacks to be exported and was very limited in functionality, along with poor usability with the launchers (such as the version profile requiring manual selection every time the user returned, as it's not a proper checked, automatically installed/registered version installation like the Forge ones are, it's just another version that appears in the list and is useable). While this method isn't as beneficial in features as Jumploader, it allows for running snapshot versions without the need of Forge, while Jumploader requires Forge and can be difficult to get working on snapshots when using a release version and trying to force a snapshot on the CurseForge launcher. Jumploader was a more simplified and definitive way to allow Fabric mods to work on the CurseForge launcher more naturally and modpack exporting way for Fabric modpack creators to create and post modpacks to CurseForge without any limitations to the user experience. Jumploader allows Fabric mods to work on the launcher but also don't allow Forge mods to work in the profile/modpack. Forge mods will be ignored. Jumploader does not make Forge & Fabric mods compatible, Patchwork is that solution.

With the removed support on the Twitch launcher for modpacks on November 30th 2020, the CurseForge launcher is required to create modpacks. However the experience that was presented on the Twitch launcher is the same on the CurseForge launcher so the setup process is unchanged due to the file structure being the exact same.



Installation instructions

 * 1) Download Jumploader from CurseForge and place it in the mods folder of the modpack it will be applied to (or from a new/existing instance in the Twitch or CurseForge launcher).
 * 2) Launch the modpack from the launcher.
 * 3) A window with a green bar with "Jumploader" may appear the first time to inform the user it is setting up its requirements.

Before exporting a modpack to CurseForge (or setting up environments), Jumploader will


 * ignore Forge mods from the modpack
 * require a Forge modloader to be part of the modpack to apply the requirements for a Fabric modpack
 * require Asset Validator for 1.16 Snapshots and Pre-Releases. It is not required for exported 1.16.1+ Fabric modpacks as fixes have been made.