New

• Added MySQL support - keep your data in a database instead of a local file
• The plugin is now fully translated, so menus and messages match the language you pick
• Added a Quick Actions menu in player profiles - toggle trust, clear flags, scan or kick in one click

Improvements

• Cleaned up the player inventory view - hotbar sits at the bottom like a real inventory
• Clicking an item in a player's inventory now shows its full details

Fixes

• Fixed translations not showing up in menus and messages
• Fixed menus misbehaving after switching language

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

~ Improved GUI menu handling
~ Improved performance
~ Fixed Item Quarantine
~ Reduced file size

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

Item Stacking System

• Fixed tracked items not stacking in inventory (NBT issue)
  
• 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

Player Management

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

- 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)

Fixed an issue where items would stop stacking after the grace period ended

Stacking System
- Fixed stackable items (ores, ingots, gems, etc.) not stacking properly in inventory
- Fixed items losing their tracking IDs when stacking together
- Fixed metadata comparison preventing legitimate items from combining

Detection System - Reduced False Positives
- Fixed DUPLICATE_ID false positives when mining from the same vein
- Fixed velocity checks incorrectly flagging normal mining activity
- Fixed grace period not working for new players joining the server
- Fixed detection confidence score calculation errors
- Fixed behavioral checks being too aggressive on legitimate gameplay

Mining & Item Drops
- Fixed duplicate ID generation when mining ore veins
- Fixed transaction logging creating duplicate records

Death Tracking
- Fixed death tracking only storing one ID per item type
- Fixed item recovery validation not working with stacked items

Improvements
- Increased detection thresholds to reduce false positives (90% confidence required)
- Improved grace period handling for new players
- Better stack ID management for all stackable items
- Enhanced vein tracking while maintaining unique item IDs
- More accurate velocity and behavior analysis

Also supports: Spanish, Chinese, Japanese, Russian

Quarantine System
- Auto-quarantine suspicious items based on confidence scores
- GUI manager with sorting/filtering options
- Restore or destroy quarantined items
- /antidupe quarantine [player] command

Async Batch Scanner
- Multi-threaded inventory scanning
- Minimal server performance impact
- /antidupe batchscan [player|all] command

Item Restoration
- Restore quarantined items to players
- Bulk restore options available
- /antidupe restore <player> [itemId|all] command

Fixed null checks errors in console.