Shifting Wares Mod Wiki & Guide

You can't prevent rerolls entirely, but you can plan around them by keeping multiple mending villagers or accepting that you'll need to find a new one periodically. The daily reroll mechanic is the core balance feature of this mod, so it applies to all villagers by default.

With Workstation Protection enabled (the default), breaking and replacing a workstation no longer forces rerolls—trades are now tied to the villager's UUID instead. If a trade disappeared, it was likely depleted and rerolled by the depleteReroll trigger when the villager restocked.

By default, map trades never reroll because Minecraft permanently saves maps to your world. You can enable map rerolls in the config with shiftingWares.allowMapReroll, but only if the map trade has been used at least once.

Yes, but it's less exploitative than vanilla. You can still create a trading hall, but villagers will eventually offer different trades, so you'll need to maintain multiple villagers for each type of trade or accept rotating stock.