@Rfarrand, @Qgil: So does someone have links to previous "MediaWiki 101" sessions, slides, videos?
Spent a few minutes on Commons and Youtube now and I fail.

I could imagine preparing/running such a session but would really like to see what has been covered in the past and not only depend on my memory here.

[Edit]: Hmm, maybe Quim's "The Wikimedia open source project and you" in https://phabricator.wikimedia.org/T85590#1248338 might provide some pointers.

@Aklapper: @Qgil did not use slides last time, he just pulled up some webpages which he could probably list here and talked about them.

• Show real pages with info:
  • High-level overview of MediaWiki development with links: https://www.mediawiki.org/wiki/Developer_hub
    • Git to get code, Phabricator to file tasks, Gerrit to review code.
  • Introduction to developing MediaWiki: https://www.mediawiki.org/wiki/How_to_become_a_MediaWiki_hacker
  • There's more (docs, translation, design): https://www.mediawiki.org/wiki/How_to_contribute
  • TODO: Actual coverage? Above pages mention e.g. word "template" but no matches for "gadget".
• Languages variety/diversity: PHP, JavaScript, Objective-C, Java, HTML and CSS/LESS, ...
• Try to make sure that people who know about {gadgets, templates, core, mobile, ...} are present in the room. Make them stand up, let people refer to them.
• TODO: Andre to also check out Quim's FOSDEM 2013 slides on https://www.mediawiki.org/wiki/How_to_contribute/Presentation (might be partially outdated / too broad / too narrow / foo)

Edited the task summary after giving this some more thoughts and watching random videos and slides.
Feedback welcome but not mandatory :)

Andre! This looks really great! Thanks for raising the bar on this. I think it will be greatly appreciated. :)
Now we just need a good plan for what to do with people who come up and tell you they don't have projects!

Don't forget Parsoid! (T105175)