Home Assistant Core 2026.8.0 → 2026.9.4

Flexit Nordic (BACnet)

The deprecated fireplace mode switch entity has been removed. If you have automations or scripts that use switch.<device>_fireplace_mode, use the climate.set_preset_mode action on the Flexit climate entity with preset_mode: fireplace instead.

(@magnusoverli - #179272) (Flexit Nordic (BACnet) documentation)

KNX

KNX exposes no longer send an entity's first value to the KNX bus. Previously, this depended on timing: if the entity already had a value when the expose was set up, nothing was sent, but if the value arrived later, it was sent to the bus right away.

Now, both cases behave the same way. The first value is adopted locally without sending a telegram, but stays available for read requests and periodic sending. Later value changes are still sent as before.

To send the first value right away, turn on Send on initialization for the expose in the KNX panel, or set send_on_init: true in your YAML configuration.

(@Kolbi - #178793) (KNX documentation)

LLM APIs

LLM tool names are now prefixed with the domain of the integration that offers them. For example, GetLiveContext becomes homeassistant__GetLiveContext and HassTurnOn becomes intent__HassTurnOn. If you have a custom prompt that names a tool directly, update it to use the new prefixed name.

(@balloob - #179938)

Persistent Notification

Updating a persistent notification that already exists now triggers an update_type of updated instead of added. If you have an automation that triggers on an update_type of added to catch every new or changed notification, add updated to the list of types it triggers on.

(@davidlang42 - #171067) (Persistent Notification documentation)

UniFi Protect

The smart detection switches (for example Detections: Person, Detections: Vehicle, and the audio alarm toggles) are no longer hidden while recording is disabled. They now stay available and follow the same public API as the other camera configuration switches. Their entity IDs and what happens when you toggle them are unchanged.

(@RaHehl - #174963) (UniFi Protect documentation)

UniFi Protect 7.2.105 or newer is now required. On an older version, the integration stops setting up and tells you to update. Update UniFi Protect, then reload the integration.

(@RaHehl - #179954) (UniFi Protect documentation)

Update

Installing an update, skipping an update, and clearing a skipped update now require an administrator account. These are configuration-level actions, so they are now restricted to admins, like other sensitive actions in Home Assistant.

Automations are not affected, because they run without a user context. A script runs in the context of the user who started it, so a script that installs or skips an update now fails when a non-admin user starts it. Trigger it from an automation instead, or start it as an admin.

(@balloob - #178232) (Update documentation)

Vacuum

The deprecated battery_level property has been removed from the base vacuum entity. All core vacuum integrations were already migrated in Home Assistant 2026.8. If a custom integration still sets this property, it no longer reports a battery level; add a separate battery sensor instead.

(@gjohansson-ST - #175682) (Vacuum documentation)

Z-Wave JS

The Z-Wave actions to manage lock users and credentials (set_user, delete_user, delete_all_users, set_credential, delete_credential, and delete_all_credentials) now require an administrator account.

(@balloob - #177300) (Z-Wave JS documentation)