These days with AI it's a lot easier to come back after missing several days. It can often do a good job distilling things, especially if it already knows the kinds of things you'll really care to hone in on and prioritize.
'Claude read all my mentions and summarize them' <-- this or do you do something specific?
Not even just mentions in a chat platform, but all the chat history I've missed out on. All the emails I've missed. All the meeting notes for the meetings I didn't attend. Read it all. Give the agent(s) what kinds of things you're likely to be interested in knowing about, if a certain project you were working on got mentioned or if they made progress on some problem.