I was skeptical at first, Claude Cowork is already pretty good. But Runner is so much better!
I have no idea how they did it but I was able to hook up my 7 (yes SEVEN) gmail accounts to it and have it flag what's important for me to deal with right away. No hacky work around, no forwarding all your emails to a new central email.
If your life doesn't fit neatly into a single Gmail connection and a single Google Calendar, this is for you.