The update has finally been released last week.
Anyone can play with the sdk and upload the game/puzzle on CodinGame using the "contribute tab". The contributions cannot be published yet, but at least, you can share a link to the demo. If you get into any trouble, don't hesitate to ask for help.
Also, I've decided to modify a bit how we handle the creation of community contests. Until now, there was a waiting list and I created teams of contributors according to that list. This solution was not ideal for many reasons.
Here's how we'll handle it now:
1) Anyone interested in creating a game/puzzle can now make a prototype using the sdk and push it on CodinGame. I let you team up with whoever you want.
2) Once you're happy with your prototype, instead of publishing the draft on CodinGame and have it accepted or refused by moderators, you can ping me.
3) We'll review the prototype and discuss with you what needs to be done for it to become an official CodinGame contest.
4) We'll discuss things on Discord instead of Slack. I've created a #community-contests channel there.
The documentation contains some guidelines. We'll keep it updated.