EDIT This is now
status-review status-planned status-completed! Thanks to SE for making this happen pretty quickly :)
In case anyone hasn't noticed, we have an info box in the top right corner above the official blog, meta features, and hot meta posts box. This isn't on every site and apparently isn't an easy setting to change and likely requires devs to edit it. As such, I have been instructed to post it for status-review so it goes on the to-do list and hopefully is edited ASAP.
The new text we would like is:
Welcome to Code Golf and Coding Challenges Stack Exchange! This is a site for recreational programming competitions, not general programming questions. Challenges must have an objective scoring criterion, and it is highly recommended to first post proposed challenges in the Sandbox.
<a href="https://codegolf.meta.stackexchange.com/questions/20861/welcome-to-code-golf-and-coding-challenges-stack-exchange">Welcome to Code Golf and Coding Challenges Stack Exchange!</a> This is a site for recreational programming competitions, not general programming questions. Challenges must have <a href="https://codegolf.meta.stackexchange.com/questions/8130/why-do-we-have-objective-winning-criteria">an objective scoring criterion</a>, and it is highly recommended to first post proposed challenges in the <a href="https://codegolf.meta.stackexchange.com/questions/2140/sandbox-for-proposed-challenges?answertab=active">Sandbox</a>.
(Thanks to caird coinheringaahing for this proposal, here).