It would be super neat if all the Node core modules shipped manpages. E.g. the HTTP module would have a corresponding node-http(3) manpage. (Is section 3 the most appropriate? It's for library calls, so I'm not sure. Let's bikeshed.) In particular this is useful for working offline - I suspect a lot of distributions of Node don't ship the HTML docs. I know my Homebrew install sure didn't install them.
I'm totally willing to put together a PR adding a build process for these, but I wanted to double-check that such a PR would be accepted.