Contraband Scanner (Nirvana)

Right-clicking with the scanner in hand searches the surroundings for forbidden items and writes the result to chat. The scan covers chests, barrels, shulkers, furnaces, hoppers and dispensers, along with the items lying on the ground, growing plants, cars and other blocks from mods that expose a standard item handler. Inventories of other players and ender chests are included too. The default scan radius is 50 blocks.

The scanner never reveals exact coordinates. It reports prohibited items as zones and gives a cardinal direction, so a player learns that something is nearby and which way to go. Holding a detector item in the hand switches to a metal detector mode: it passively rings and beeps while the selected item is carried, and the closer a prohibited item is, the more often the squeak sounds and the higher its tone. The mod ships with Nirvana mod items and is published for NeoForge 1.21.1 under the MIT License, though it is not open source.