AntiBundleDuping

Automatically removes bundles from hoppers on Minecraft Bedrock Edition servers running the Endstone engine, preventing duplication exploits.

🎯 Overview

AntiBundleDuping is a lightweight plugin for Endstone that monitors hoppers in real-time and automatically replaces any hopper containing a bundle with a clean, empty one. This effectively prevents duplication exploits where bundles interact with hoppers to duplicate items, without restricting legitimate player interactions.

Instead of blocking players from using containers — which proved ineffective against creative exploit methods — this plugin takes a direct approach: it detects bundles inside hoppers at the packet level and resets the hopper immediately, breaking any duplication mechanics while keeping the hopper functional for normal use.

✨ Features

• 🔍 Packet-level detection — Monitors inventory packets sent to players and detects bundles inside hoppers instantly
• 🔄 Automatic hopper reset — Replaces affected hoppers with fresh empty ones in 2 ticks, dropping the bundle as a world item
• 🧹 Non-intrusive — Players can interact freely with all containers; the plugin silently cleans hoppers in the background
• 📊 Console logging — Logs every detection and hopper reset with location details for server administrators
• ⚡ Lightweight — Minimal performance impact using event-driven architecture with scheduled safe block operations

📋 Requirements

• Endstone 0.11 or higher
• Minecraft Bedrock 1.21.60 or higher

🚀 Installation

1. Download the latest .whl file from the releases page
2. Place it in your server's plugins/ directory
3. Restart your server
4. The plugin will automatically start monitoring hoppers — no configuration needed

🔧 How It Works

1. When a player opens a hopper, the plugin remembers which hopper was accessed
2. If the server sends inventory data containing a bundle (minecraft:bundle), the plugin marks that hopper for cleaning
3. On the next server tick, the hopper is replaced with air (dropping its contents)
4. On the following tick, a new empty hopper is placed in the same location
5. The bundle falls as a world item and cannot be used for duplication

📝 Notes

• The hopper replacement resets the hopper's orientation to facing down (default state)
• This is intentional and helps break dupe mechanics that rely on specific hopper orientations
• Bundles dropped on the ground will not be picked up by the new hopper immediately due to the 2-tick reset window
• No player permissions or commands are required — the plugin works fully automatically

📄 License

This project is licensed under the MIT License — see the LICENCE file for details.