The Ansible documentation should be reasonably up-to-date - I’ve been trying to keep an eye on it, but I will admit that I am not up-to-date with a version running on my own module, and have lost track of versions. The community has been working on keeping it up-to-date, and I’ve certainly been trying to ensure that anyone adding or changing functionality also adds or changes the documentation in the same ‘pull request’ (request to change a bunch of code).
I’ll also note that the Ansible documentation is One Big Page primarily because that’s how it’s written. The styling of the monome site itself possibly makes the delineations between apps hard to tell, and it just becomes one huge page that’s hard to skim; it might be that doing a page-per-app is more appropriate. That’s a little project, and I’m on vacation for a bit so can’t really kick that off.
But I am going to suggest it here now, and perhaps as an enhancement ticket over at Github.