Home Assistant gives System Bridge notifications up to three labeled buttons and an identifier that automations can follow. A new event entity reports the notification being sent, clicked or closed, with the identifier and button action connecting each response to the original message.
The available events depend on the computer: Linux reports clicks and closes, Windows reports clicks, and macOS reports neither. Event support starts with System Bridge 5.20, sent events need 5.27, and version 5.28 carries the same button replies from paired Android phones.
The new notification action replaces the legacy host-specific action, which is scheduled for removal in June 2027. A repair notice provides migration examples.