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Allow custom block entities to have own tile entity ids (Bedrock)

Currently, all custom block entities in the game added by addons from the new 26.30.28 preview can only use this savegame id:

DataDriven

 

This can somewhat limit identifier possibilities compared to Java Edition mods, which tend to use block entity identifiers like for example:

custom:data_driven

 

This can be fixed by a new field to the minecraft:block_entity component named savegame_id. Any identifier name can be used, including names in pascal case, camel case, snake case and namespaced identifiers. If not present, the custom block entity id defaults to DataDriven.

"minecraft:block_entity": {
     "dynamic_properties": true,
     "savegame_id:": "custom:data_driven"
}

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• May 13, 2026 14:48
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  • May 15, 2026 11:43
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  There could also be another field called runtime_identifer where the data driven block entity takes the hardcoded properties of a vanilla block entity.

  For example, this gives a data driven block entity hardcoded block entity properties of a chest, but the block entity id remains as DataDriven:

  "minecraft:block_entity": {
       "dynamic_properties": true,
       "runtime_identifer:": "Chest"
  }

  There could be another field called use_runtime_id_as_savegame_id, where if true, the block entity id is set to the hardcoded identifier. In this example, that id would be set to Chest instead of DataDriven. Note that field should only usable if runtime_identifier is present and the savegame_id field is not also present at the same time.

  "minecraft:block_entity": {
       "dynamic_properties": true,
       "runtime_identifer:": "Chest"
       "use_runtime_id_as_savegame_id": true
  }

  Example:

  This would give a data driven block entity the hardcoded properties of the vanilla block entity Cauldron, while setting its block entity savegame id to CustomCauldron:

  "minecraft:block_entity": {
       "dynamic_properties": true,
       "runtime_identifer:": "Cauldron"
       "savegame_id": "CustomCauldron"
  }