ItemCheck

Fixes

• Fixed a duplication bug that could happen when picking items up with a nearly-full inventory
• Fixed items sometimes losing their tracking ID after being dropped and picked back up
• Fixed ghost items appearing in the inventory after a blocked pickup, move, or craft
• Fixed stacked items losing their IDs when merged by hand or shift-click
• Fixed mass scan (/antidupe scan all) causing lag and occasional crashes on busy servers
• Fixed batch scan sometimes corrupting item data

Compatibility

• Now runs cleanly on 1.20 through 1.21.x+

Performance

• Improved pickup and stacking performance
• Reduced memory usage during long sessions
• Scans moved to a safer execution path to prevent server hitches

Detection Settings

• Fixed Grace Period settings not saving to config
• Fixed all settings not updating display after changes
• Fixed settings using stale values instead of reading from config
• Debug mode now properly saves to config

Transaction History

• Fixed filter system (ALL, TRADE, CRAFT, DROP, PICKUP) not working
• Filters now properly display filtered transactions
• Active filter now shows with green highlight

Player Management

• Fixed search player feature not capturing chat input
• Search now properly opens player profiles

Item Stacking System

• Fixed tracked items not stacking in inventory
• Fixed dropped items not merging on ground
• Manual stack merging now works with left/right-click
• Shift-click stacking properly combines item IDs
• Items from different slots now stack correctly

• Fixed: Dropping Item would not stack with tracked items
• Added: Full 1.20.x - 1.21.x server support
• Added: Automatic SpigotMC update checker
• Added: /antidupe version command for compatibility info

• Fixed: Items weren't stacking due to anti-dupe tracking keys interfering with stack merge detection

Particle Effects

• Added Visual particle effects now appear on flagged items during scans
• Added Three severity levels: Low (green), Medium (orange), High (red)
• Added Toggle on/off in Detection Settings GUI
• Added Configurable particle types in config.yml

Detection Weights Customization

• New GUI to customize confidence weights for all 17 detection types
• Fine-tune detection accuracy per flag type (0.00 to 1.00)
• Adjustable in increments of +0.05 or +0.10 (shift-click)