SharedCure

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SharedCure is a Paper plugin that implements server-wide villager discount sharing using a small tag (PDC) and Just-In-Time reputation injection approach. When a villager has been cured by any player, this plugin ensures other players who interact with that villager receive the highest trade discount (MAJOR_POSITIVE) without requiring bulk updates across all players.

Features

• PDC three-state management: Each villager receives a discount_status tag (PDC) indicating UNKNOWN, NOT_CURED, or CURED to minimize server-wide operations.
• Instant Reputation Injection: When a player interacts with a villager in the CURED state, the plugin will, if necessary, instantly inject MAJOR_POSITIVE reputation for the player's UUID, ensuring that the discount is immediately reflected in the trading interface. This only affects the cured reputation (MAJOR_POSITIVE) and does not impact other types of reputation.
• Legacy villager backfill: On plugin load and chunk load, villagers that lack the plugin tag are deep-checked for existing reputations (gossip) and tagged accordingly to support older worlds.
• Cure capture: The plugin listens for EntityTransformEvent and marks zombie villager conversions as CURED instantly.

Architecture Overview

Module	Event	Purpose
Existing villager initialization	ChunkLoadEvent + startup scan	Tag existing villagers and deep-check gossip/inventory for unknown states.
New villager tagging	CreatureSpawnEvent	Tag newly spawned villagers NOT_CURED.
Cure capture	EntityTransformEvent	Mark newly cured villagers as CURED.
JIT injection	PlayerInteractEntityEvent	Inject MAJOR_POSITIVE reputation for the interacting player when villager is CURED.