Ender Chest Restrictor

Ender Chest Restrictor is a small Fabric mod that prevents configurable items from being stored in Ender Chests.

The restriction applies recursively, meaning an item is also blocked if it is contained inside a Shulker Box, Bundle, or any combination of nested containers.

Blocked items are not banned. They can still be used, carried, dropped, and stored normally in regular inventories and containers — they simply cannot be placed into an Ender Chest.

Features

• Configurable list of restricted items
• Recursive detection of items inside Shulker Boxes and Bundles
• Supports nested containers and combinations of containers
• Affects Ender Chests only
• Server-side enforcement
• Lightweight implementation using targeted inventory and Bundle interaction mixins
• Compatible with vanilla and modded items

Configuration

After the first launch, a configuration file is generated at:

config/enderchestrestrictor.json

Example:

{
  "blockedItems": [
    "minecraft:dragon_egg",
    "minecraft:nether_star"
  ]
}

Add any valid item ID, including items from mods.

Configuration changes require a server restart.

Notes

• Restricted items can still be stored in normal inventories and chests.
• Restricted items can still be placed inside Shulker Boxes and Bundles.
• Nested containers are checked recursively.
• Only storage in Ender Chests is restricted.
• The restriction is enforced server-side, so client-side changes do not override the server's inventory checks.

How It Works

Ender Chest slots reject restricted items through the server-side slot validation logic. Bundle-specific interactions are handled separately to prevent restricted items from entering a Bundle during an Ender Chest interaction.

When an item is checked, its own type and the contents of supported container components are inspected recursively.