[ndimares]

I've never used any of the products, but there are some interesting developments in the "code visualisation" space, i.e. https://www.codesee.io/. My sense is that right now they're mainly targeting use case #1 that you mentioned, but I'm interested in whether they will grow to be useful for use case #3 which you mentioned.

The project I work on (speakeasyapi.dev) is more focused on the public API side for now, but we've looked at the microservice problem. We've come at it from the angle of providing an SDK which can track the traffic to a service. That way you can be aware of your services true surface area vs. what's documented.

Curious to hear other ways people are solving these problems.