Codex Code

I’ve seen some requests here for this before, but most answers have dodged the question.

Is it possible for us to get the codex code? I looks like it’s just a mediawiki theme… I would like to integrate a documentation site and a WordPress blog.

I’ve found this:
http://meta.wikimedia.org/wiki/Gallery_of_user_styles#WordPress

But it looks quite old and outdated…

Thanks!