This looks really interesting, thank you for putting this together! I’ll likely give it a go today. I say that as someone who has explored quite a few of these and found them mostly quite basic. srgn looks like more than the usual.

One minor comment: I personally found the first Python example involving a docstring a little hard to parse (ha). It may show a variety of features, but in particular I found that it was hard to spot at a glance what had changed.

If you could use diff formatting or a screenshot with color to show the differences it would make it much easier to follow. If I get around to using it later today, I might submit a PR for that. :)