Auto Librarian

AutoLibrarian is a lightweight automation mod that takes the tedium out of librarian villager trading. Instead of manually breaking and replacing lecterns for 20–40 minutes to reroll a single enchanted-book trade, AutoLibrarian handles the entire process for you — fast, reliably, and with no commands or config files.

Main Features

• Automatically rerolls a librarian's enchanted-book trade until one of your selected enchantments appears.
• Pick enchantments on a selection screen (K by default).
• Start and stop the loop with a single key (J by default) or by .al chat commands.
• 25 supported enchantments, including Mending, Unbreaking III, Efficiency V, and more. (SEE THE FULL LIST DOWN BELOW)
• Plays a soundeffect and announces the find on the action bar when a match is found, then stops automatically.
• Breaks the librarian's own lectern, picks up the drop, and places it back. No spare lecterns required.
• Auto-swaps to an axe (if one is in your hotbar) while breaking, then swaps back to your previous slot.
• Client-side only — works on any server, no server-side install required.

See the full Enchantment list here:

How It Works

1. Press K to open the selection screen. Toggle the enchantments you want — green ✓ means selected. Close the screen.
2. Stand within ~3 blocks of a librarian villager and its lectern. An axe in your hotbar is recommended.
3. Press J to start (or use .al <enchantment> in chat). The mod will
   
   • Find the nearest librarian within 5 blocks.
   • Open its trade list and read the offered enchanted book.
   • Compare the book's enchantment against your selection.
   • If it's a match → stop, play the sound, and announce the find.
   • If not → break the lectern, wait for the drop to be picked up, place the lectern back, check trades again.
   • Repeat until a match is found or you press J again to stop.