Some regrets, I’m no more working on this extension since the initial version was published cause I realized that the MediaWiki is too complicated for our community members, even to me(as a MediaWiki instance maintainer, extension developer, and editor).
As you can see the git repository has been archived by me it is now read-only, so please feel free to fork it if you still need it(under MIT license if necessary).
P.S. We community-powered Wiki finally switch back to Discourse Wiki Post and try to extend it via the Discourse Plugin/Theme system.