GitMC

Each world gets a .git folder inside its save directory, and GitMC embeds JGit so no Git installation is needed on the system. A .gitignore is created and kept up to date so that only meaningful world data is tracked. Commits capture the blocks, structures and terrain changes that make up a save, and a player can run a save from in-game chat or a command to record a checkpoint before a large build.

Branches let a player try a different base layout or a mega-build on a separate line of history while the main world stays untouched. Switching between branches is a single command: GitMC saves automatically before switching, reloads the world and restores the player's position. Git log shows the history, and checkout jumps back to a past state. Auto-commit can save the world every set number of minutes or when a player sleeps in a bed or leaves.

The mod can also restore individual chunk files from a past commit, such as a .mca region, without touching the rest of the world. It is client and server, so the server and every player need it, and it requires Fabric API and Fabric Language Kotlin. Files are published for Fabric on 26.1, and the code is under the MIT License, which is not open source.