Logging systems often have the specificity you're describing, with selectors for modules etc. You could expand a logging system to handle asserting. "Log the current state, which should never be Running."
Thanks. Yeah, I've also been having similar thoughts for logging systems. In particular right now we (at my job) configure the log level through compile-time switches. It would be nicer to be able to toggle things dynamically. Yes, including per module instead of just "debug" or "info"
This is Spring Boot so it seems possible.