Mirror Chunks is a server-side Paper plugin for Minecraft 1.21.x that mirrors player actions across all loaded chunks in the same world.
When a player places or breaks a block, tills dirt with a hoe, empties a water or lava bucket, presses a button or lever, or uses a spawn egg, the action is repeated at the same local chunk coordinates in every loaded chunk.
Changes are saved and applied when previously unloaded chunks load later. Each world has its own separate mirror data, so Overworld, Nether, End, and custom worlds never mix.
