Worldsure

Insurance for your world when the mod list changes.

Removing a mod, or loading an older version of one, makes Minecraft quietly delete everything that mod added: blocks, chests and machines, mobs. Worldsure notices before that happens.

What it does

• Remembers the mods of every world. Each world gets a small passport listing the mods and versions it was last played with.
• Asks before opening a changed world. In single player a clear screen lists every mod that was removed, updated, downgraded or added, with how many blocks, chests or machines and mobs of each are in the world. Choose Back up & play, Play without backup or Back, and open the same screen again any time from the pause menu.
• Backs up servers automatically. On a dedicated server the world is zipped to backups/worldsure/ before a single chunk loads. The 5 newest backups per world are kept.
• Keeps the blocks of removed mods. While a mod is missing its blocks appear as a Block of a removed mod that cannot be broken. When the chunk is saved, the original blocks and their contents are written back, so putting the mod back restores everything.

Removing Worldsure itself is always safe: its placeholder blocks are never saved into the world.

Versions

On Fabric, Fabric API is required.

Good to know

• Install it on both the server and the clients, since it adds a block.
• Mobs and items of a removed mod are not kept yet. Make a backup before removing mods that add them.
• Counts only cover chunks saved while Worldsure was installed.
• Settings: config/worldsure.properties (autoBackup, keepBackups).

Links

• Source code: https://github.com/KaiNrav/worldsure-source
• Bug reports and ideas: https://github.com/KaiNrav/worldsure-source/issues