Discuss the wiki-tag on this page. Here is the place to ask questions and propose changes.
We already have a community projects tag with many posts attached. Would you be able to adapt your website to draw from that tag, instead?
Note that some posts in the existing tag involve things that are not themselves projects — lists of projects, calls for projects, etc. That seems appropriate to me, as I'd expect those posts to be interesting to someone who checks out the "community projects" tag page. But it might not work if your website is drawing from a tag in an automated way.
Could you say more about what you hope to do with the site? I'd guess that some amount of manual data entry will be needed for each project anyway, which implies that automatically reading from a tag (if that was your plan) might not be all that helpful — but that's just a guess.