Yes a moderated wiki would be ideal. Isn't there readily available moderated wiki software (possibly even git-backed)? That seems more wiki (quick) than opening PRs.
The [Edit on Github] button didn't go anywhere for me and I don't see how to create a new 'card'/entry. There seems to be (IMO) too much friction for this to be well-maintained.
The [Edit on Github] button didn't go anywhere for me and I don't see how to create a new 'card'/entry. There seems to be (IMO) too much friction for this to be well-maintained.