magnet-hopper

The magnet variant of the hopper pulls dropped items from a three-dimensional radius and stores them in a 5-slot internal inventory, then pushes them into the container below on the standard 8-tick cadence. It also pulls from the container above, so it can act as a full item conveyor. A magnet toggle switches the pull off, leaving the block behaving as a normal hopper. Redstone signals pause all of its activity, the way a vanilla hopper behaves. It is a strict superset of the regular hopper, so existing behavior is kept. A single block is enough to clear items from a mob farm that would otherwise let them despawn.

The 5-slot storage can be filtered with a whitelist or blacklist. Clicking a filter slot with an item sets a ghost copy without consuming the item, and clicking with an empty hand clears the slot. The whitelist and blacklist mode can be toggled in the interface, and the filter slots are exposed as configuration options. Pipe compatibility is provided by exposing the 5-slot storage through Fabric ItemStorage.SIDED on Fabric and the NeoForge item-handler capability on NeoForge. It requires Fabric API on Fabric and the 0.18.4 loader or newer. Files exist for 26.1, 26.1.1, 26.1.2, 26.2 and 26.3, with 0.3.0 for 26.3 as the latest build on both loaders. Snapshot builds are published.