Villager trading for Mending: check your ruleset

Check the world before rerolling a librarian

In the Java 26.3 default data used here, Mending is in the tradeable enchantment pool and outside the enchanting-table pool. That means an ordinary librarian can offer it; it does not promise a particular roll, fixed price or number of attempts.

The optional Villager Trade Rebalance follows different rules. Mojang’s 23w31a announcement introduced biome-specific librarian books and a special master-level book. In that experiment, Mending is the swamp librarian’s special book. A novice reroll loop is therefore the wrong plan for that configuration. Check the world’s experiments and server settings, rather than assuming every world uses the experimental rules.

Ordinary trades: a practical check sequence

1. Identify an adult villager that can take the librarian profession and has never completed a trade. Nitwits and villagers with locked trades are unsuitable for rerolling.
2. Give that villager access to a lectern during working time. Avoid another nearby villager claiming the workstation you intended to use.
3. Read the offered book’s actual tooltip, level and cost. Do not confuse the bookshelf trade with an enchanted-book offer.
4. If the trade is unwanted and no trade has yet been completed, remove and replace the claimed lectern and verify that the profession and offers actually change.
5. When the correct Mending book appears, complete a trade to lock that villager’s offers. Keep access to its own lectern so it can work and restock.

If nothing changes

Check prior trading first, then work time, profession and which lectern the villager has claimed. Repeatedly breaking an unrelated lectern does not reroll the intended villager. On a server, ask which trade rules or plugins are active. This guide does not prescribe a fixed reroll count or guarantee a minimum emerald price.

Use the book without changing its meaning

Mending I contributes 2 levels when a fresh book is applied to compatible fresh gear in this model. Prior work on either input adds to that. Collected experience repairs eligible held or equipped gear; merely leaving the item elsewhere in the inventory is not enough. Mending does not erase prior-work history, and Infinity conflicts with it on a normal bow.

Curing discounts and the safety of moving villagers are separate mechanics. We do not promise a five-emerald book, stackable cures or a zero-risk method. Check your world before committing resources.