Magnet Hopper

A hopper variant that pulls dropped items in a 3D radius before depositing them into the container below. Solves the universal "items despawn around my mob farm" pain in one dedicated block.

Features

• Magnet pull — ItemEntities in the tier's 3D radius get vacuumed into the internal 5-slot storage and flow down into the container below.
• Vanilla hopper behavior always active — strict superset of a regular hopper: pulls from any container above, pushes to any container below at the standard 8-tick cadence.
• Magnet on/off toggle — UI button to disable just the magnet pull (block keeps acting as a normal hopper).
• 5-slot whitelist/blacklist filter — click a filter slot with an item to ghost-set (the item isn't consumed); empty-hand click to clear; toggle whitelist/blacklist in the UI.
• Redstone-disable — applying a redstone signal pauses everything (matches vanilla hopper convention).
• Placement preview — hold a magnet hopper in either hand and the affected radius draws as a cyan-mint wireframe over your cursor target, with a warm-green surface contour that follows terrain so the floor coverage is always legible.
• Pipe compatibility — exposes the 5-slot storage via Fabric ItemStorage.SIDED and the NeoForge item-handler capability. Filter slots are config, not exposed.

Compatibility

• Minecraft: 26.1.x
• Fabric: Loader 0.18.4+ with Fabric API
• NeoForge: 26.1+
• Java: 25

Known limitations

• Items in internal storage spill when the block is broken (the drops are still pickup-able). NBT carry-over planned for v0.2.
• Filter configuration is lost on break. Planned for v0.2.
• All magnet hoppers face down only; side-facing variant planned later.

License

CC0-1.0 (public domain). Use freely in modpacks and derivative works.

Links

• Source / issues