This is not yet stable.
This started as an alternative to racket/trace, with the idea of
emitting structured logger events that contain more data ---
especially source location information.
Eventually, I realized that some of the ideas could be generalized to non-tracing logging.
So I shifted this from stuffing extra information in the data slot
of the logger event vector --- which normally is
(current-continuation-marks) --- to instead storing it in
continuation marks. That way plain old logging continues to work
normally. But a log receiver that knows about the continuation marks
can retrieve their values.
I've put a lot of work into the Scribble documentation, so feel free
to see that. But again, this is not yet stable. I have a tracing
branch of Racket Mode that dynamic-requires this and, if available,
uses it to greatly enhance the racket-logger-mode. I'm dogfooding
that indefinitely before even thinking of putting this on
https://pkgs.racket-lang.org.