Skip to content

NBT Structure

This section explains the NBT structure used by ItemCaster for handling skill data in Minecraft items. NBT is used internally to store and read ability definitions that can be cast from the item in-game.

Structure Format

minecraft:custom_data: {
  ItemCaster: {
    abilities: [
      {
         skill: <String>,
         activator: <String>,
         cooldown: <Double>,
         sneaking: <Boolean>,
         interval: <Integer>,
         signal: <String>,
         variables: {
          <key>: <value>
        }
      }
    ]
  }
}

"ItemCaster": {
  "abilities": [
    {
      "skill": <String>,
      "activator": <String>,
      "cooldown": <Double>,
      "sneaking": <Boolean>,
      "interval": <Integer>,
      "signal": <String>,
      "variables": {
        "<key>": <value>
      }
    }
  ]
}

Note

The minecraft:custom_data namespace is usually written to item NBT using a datapack or commands like /give or /data modify. All data should be placed under the ItemCaster object, with an abilities array containing one or more ability objects.

See Here for full explanation of Attributes

Example In /give Command

Here’s an example of how to give an item using this NBT with /give:

/give @s stick[minecraft:custom_data={ItemCaster:{abilities:[{skill:"SummonSkeleton",activator:"LEFT_CLICK"}]}}]

You can use tools like MCStacker to help you build long NBT-based commands more easily.