Clarifying question about the new ‘Add MQTT Device’ feature

Configuration
1

Hi everyone,
with HA Core version 2025.7.0 a new feature was added to the MQTT integration. You can now manually add devices—but what exactly does that mean?
For example, I’ve created an MQTT sensor:

  - name: briefkasten
    unique_id: briefkasten
    state_topic: homeassistant/persistence/briefkasten

Does that mean I can skip adding this entry to the configuration.yaml?
Or am I completely misunderstanding something?

many thanks!

2

Yes that is exactly it. You can create it using the UI instead now. See: https://www.youtube.com/live/3MlaIzfRxCg?si=S2WYKKlKxGtdAmVD&t=5014

3

Ahh cool, so I did understand it correctly after all—and now I’ve got it working! I think that’s really great.