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Validation of entity action schemas

· One min read
Erik Montnemery

Registering entity service actions allows integration authors to pass in:

  • No schema (None)
  • A dictionary, which will be converted to a voluptuous schema by passing it to cv.make_entity_service_schema
  • A custom voluptuous schema

For the third case, a warning will now be logged when registering an entity action with a custom schema which does not meet at least one of these criteria:

  • A validator returned by cv.make_entity_service_schema
  • A validator returned by cv.make_entity_service_schema, wrapped in a vol.Schema
  • A validator returned by cv.make_entity_service_schema, wrapped in a vol.All

In Home Assistant Core 2025.10, it will no longer be possible to register an entity action with a custom schema not meeting this requirement.

The reason for the change is that if cv.make_entity_service_schema is not used, the service will not automatically support all possible ways of targeting entities.

More details can be found in the developer documentation and in core PRs #124102 and #125057.