VillagerMetaFix

This compact core modification for Minecraft version 1.7.10 addresses trade system inaccuracies. The add-on ensures villagers properly verify metadata and NBT tag data of items during transactions.

By default upon activation, the mod enables metadata checking while keeping full NBT verification optional through configuration settings. The extension maintains proper functionality even in partial installation scenarios, such as when present on the server without the corresponding client mod. In such instances, purchased items appear for users but remain immovable from the trade slot.

A significant advantage lies in the ability to finely customize trade offers directly through villager summon commands. This provides extensive opportunities for creating specialized trading NPCs whose behavior can be controlled independently of the mod's main settings.

Usage Example:

/summon Villager ~1 ~ ~ {Profession:2,Career:1,Offers:{Recipes:[{buy:{id:277,Count:1},sell:{id:1,Count:64},checkMeta:0,checkNbt:0},{buy:{id:277,Count:1},sell:{id:1,Count:64},checkMeta:0,checkNbt:1},{buy:{id:277,Count:1},sell:{id:1,Count:64},checkMeta:1,checkNbt:0},{buy:{id:277,Count:1},sell:{id:1,Count:64},checkMeta:1,checkNbt:1}]}}

Important Note: Minecraft developers resolved the original bug in version 1.8.1 and subsequent releases, making this extension relevant exclusively for version 1.7.10.