A five minute cadence. The previous ambient check throttled itself to once every six hours, so a fresh release could sit unnoticed for most of a day. Now every five minute tick may check, guarded by a persisted four minute success throttle so bursts still collapse into one request.

Never over an active download. A check refuses to run while an update is downloading, downloaded, or installing, and the guard is verified twice, before and after the asynchronous preferences read, so a download you start in that gap is never interrupted. Late results from a silent check cannot rewind an active state either.

No nagging. Silent checks are invisible unless they find something. A dismissed error banner stays dismissed while the feed is broken, and retries back off exponentially, ten minutes doubling up to a two hour cap, resetting the moment a check succeeds. The per version Later snooze is unchanged: snoozing one version never hides a newer one.