@Mooeypoo: Has this happened at the Hackathon and should this task be closed as resolved? If not, which (active) project (tag) is this about?

This was done during the hackathon, and then cleaned up a bit.

There's code for cleaner development (or forking) on Github: https://github.com/mooeypoo/wikiArticleWizard
(Instructions available in the README)

If anyone wants to use this on our production wikis, add the following lines to your User:YourUsername/common.js

// Set up your article template repository
mw.config.set( 'articlesandbox-article-repo', '[PAGE NAME FOR THE TOP LEVEL OF THE ARTICLE REPOSITORY]' );
// Load the script
mw.loader.load('//www.mediawiki.org/w/index.php?title=User:Mooeypoo/wikiArticleWizard.js&action=raw&ctype=text/javascript');