The problem with using "close reasons" or something similar is that it means closing the Sandbox questions. I'm not sure if that would be good or not - need to see what the bigger users think. Most tags will be the same - challenge types (code-golf, code-bowling, koth, etc.), other specifics (e.g., possibly language specific). I was thinking of something like the Meta status-pending, status-completed, etc. type of tags, but specific to the "workflow" of Sandbox.

@manassehkatz‭ I was assuming that once a challenge is posted its sandbox manifestation is no longer active -- we don't want to delete them, but we want to mark them as resolved. They're articles so can't be answered anyway, so using a close notice is mainly a "clever" or "hacky" way (your choice :-) ) to record a link to the posted challenge and signal "done here, go there".

That may make sense. But "close" always seems to be a bit of a problem... Tags have the advantage of allowing other statuses as well, plus searching. You might want to search for "xyz" in the Sandbox for any previous posts, whether they became Challenges or not. Or maybe only the ones that are still pending, etc. Need to see what others (who will use it more) think about it. Another way to look at it: "Close" is something done by others, not by OP. OP can Delete, but that is different and not

what we want here - the idea is to have a record of the issues (via comments) as that can be helpful for future posts.