AutoTrade Villager Librarian

Once the bot is started with a command, it checks the librarian's current trade, compares it with the requested enchantment, and breaks the lectern when the trade does not match. It then waits for the villager to take the profession again, places a new lectern and checks the offers once more. The cycle repeats until the correct trade shows up, which removes the need to break and replace lecterns by hand.

The command accepts an enchantment name, such as mending, and can also set a price limit. A single number such as 9 accepts only that emerald price, while a range such as 10-15 accepts any matching trade inside it. The bot only works while the player is looking at the lectern, so the player keeps direct control over which villager is rerolled. Commands are start and stop, and no configuration files or menus are needed.

The mod is built for finding rare enchantments such as Mending, Unbreaking III or Efficiency V with little setup. It runs on the client alone, so players join servers without installing it, and it is published for Fabric only, with files for 1.21.5 – 26.2 and 1.0.0 for 26.2 as the latest build. The code is not open source, and the mod is released under All rights reserved.