This is likely a separate tool, but I suspect it is trivial to build given the framework you've set up...

What I most want is something that notices if Claude has been thinking for more than say 30 seconds, and if so sends me a slack message when the output is finished and ready to read.

Given that Claude is often thinking for 30 minutes, I context switch onto something else, and wish there were a way to get a notification so it isn't sitting idle waiting for me for ten minutes (or an hour, as sometimes happens)