Magnetism

Once a player crafts the magnet and toggles it on, it continuously detects dropped items inside a configurable radius around that player, which defaults to 10 blocks. Items drift toward the player one step at a time, with a small sparkle trail, rather than snapping into the inventory. Each player activates their own magnet independently, so one player's magnet does not affect another's in co-op worlds.

The mod is built entirely from vanilla Minecraft commands through the datapack system, using functions, tags and scoreboards, so it has no separate code to install beyond the datapack itself. The attraction check is limited to efficient selectors, and its cost scales with how many players are using a magnet, which keeps it light on worlds with many entities and on large servers. Magnetism works in singleplayer and multiplayer, and the default recipe uses materials that fit the item's purpose.

Magnetism is published for Fabric, Forge, NeoForge and Quilt, with files for 1.21.5 – 26.3 under the CC0 1.0 Universal license. The server must run the mod, while a player may leave it out and still join, though a client without it cannot use the magnet.