RedstoneAwareEdits

Bulk edits from WorldEdit or FastAsyncWorldEdit often break redstone circuits, because comparators, torches and other components pop off or lose their state while Minecraft fires block updates during the paste. The mod works around this in two phases: it suppresses neighbor updates, onPlace callbacks and shape recalculations while the bulk operation runs, then restores the correct block states and recomputes them in one clean update pass once placement completes.

Detection is automatic. Operations that place ten or more blocks in a single tick are treated as bulk operations, so no command or setting is needed for paste, stack, move and other WorldEdit or FAWE commands. The protection covers a broad set of components, including repeaters, pistons, observers, levers, rails, hoppers and TNT, as well as redstone blocks.

The mod runs either way: it can be installed on a dedicated server, in singleplayer, or on a client, and neither side is required to have it. It is built for Minecraft 1.21.11 with Fabric Loader 0.15.0 or later, and Litematica, which places blocks in bulk, is also covered. The mod is released under the MIT License and is not open source.