Do not disturb
2 open-source tools on osfeed do this, in 2 ways. Each entry says how, and where it falls short. Read the tool's page before you rely on it.
Snooze one sender or everything for a set time, or turn on Do Not Disturb, while still letting login codes through.
Limit Critical notifications still show.
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Follow this needGet notified when a tool adds, fixes or changes a way to do not disturb, including tools added to osfeed later.