I have a use case where I want to process all files in a directory at startup time, then process any new files that are added during runtime. It would simplify my code quite a bit if I could use the same event stream for both.

From an API perspective, this would be a simple, non-breaking change. We could add an existing enumeration to EventKind, (something like Existing) and also add a new enumeration to Config (maybe ListExistingFiles(bool) )

If this is desirable, I am happy to provide an implementation.