wagoodman
We wrote Chronicle to do that automation for us: https://github.com/anchore/chronicle .
The nice thing about this... since you typically curate issues during the development process anyway, if you're doing that right then you get a nice looking changlog for free! We use this approach with our core tools, Syft and Grype (some changlog examples: https://github.com/anchore/syft/releases/tag/v0.31.0 and https://github.com/anchore/grype/releases/tag/v0.26.1 ).
Always happy to hear new feature ideas and possible customizations for Chronicle (put in an issue and let's chat )!
In this way it's not just showing you a score... the score doesn't help you make the image any better. This is why letting the user explore the layers is good, to help discover and explain why there is an inefficiency (not just that there is one).