AntiDupingMechanics (Paper)

Note: this is made for 1MoreBlock.com - with GPT's help, and I don't recommend running this live until version 2.x

A small Paper plugin that blocks a few storage mechanics commonly abused in dupes, while staying player-friendly:

• Chest boats: players can still ride them, but cannot open their chest inventory.
• Chested animals (donkey/mule/llama etc.): players can still mount them, but cannot open the chest inventory.
• Prevent attaching chests to chested-animals (so new chested animals cannot be created).
• Bundles: players can keep bundles and empty them, but cannot add items into bundles.

Includes:

• Per-world config overrides
• Bypass permission: antiduping.bypass
• Reload: /antiduping reload
• Status: /antiduping status
• Debug logging via config

Commands

• /antiduping reload (permission: antiduping.admin)
• /antiduping status (permission: antiduping.admin)

Permissions

• antiduping.admin — use /antiduping reload|status
• antiduping.bypass — bypass all blocks (recommended for staff)

Per-world configuration

Config lives in plugins/AntiDupingMechanics/config.yml.

• worlds.__default__ is the baseline for all worlds.
• Add worlds.<worldname> to override any keys.

Example: allow everything in an admin world:

worlds:
  __default__:
    chest_boats: { enabled: true, block_open_inventory: true }
    donkeys: { enabled: true, block_open_inventory: true, block_attach_chest: true }
    bundles: { enabled: true, block_insert_items: true }
  admin:
    chest_boats: { enabled: false }
    donkeys: { enabled: false }
    bundles: { enabled: false }

Build

Requires Java 25+.

./gradlew build

Jar will be in build/libs/AntiDupingMechanics-1.2.0.jar.

Notes

Bundle behaviour in Minecraft can vary across versions/clients. This plugin blocks the common insert methods:

• click/drag items onto a bundle in inventories
• certain right-click interactions involving item entities (where applicable)

If you find a specific interaction path that still inserts into bundles on your server, note the exact steps, and we can tighten the checks.