Single-use tags are pruned after six months. Sometimes, this removes spurious tags. Sometimes, this removes legitimate tags.

After a quick look on Unix SE, I see plenty of legitimate tags that are at risk. I would like a way to declare that some tags are legitimate and should never be pruned. This could be a 10k tool, for instance.

I realize this might not scale on Stack Overflow, but it would work for smaller sites (I'm using Unix as an example because it's the one I know best). A warning when tags are about to expire would be a helpful complement.


3 Answers 3


Tags that have a tag wiki no longer expire even if they are only applied to one question. Therefore, you can vet a tag by writing a tag wiki for it.

  • Do we have a reference besides the 'status-completed' tag on that question? It's not listed in the Recent Features. Commented Jul 20, 2013 at 23:05
  • 1
    @LanceRoberts I never got any official reply. I went to search and found this and that question which have a single-use tag with a tag wiki and hasn't been edited in almost a year. I can't be sure that there hasn't been another question with these tag until recently though. The recent features list is maintained by the community, I'm not surprised that a discrete edit to make one question status-completed went unnoticed. Commented Jul 20, 2013 at 23:10

Another idea is to delete a low occurence tag, say, two times. If the tag reappears after that it's permanent.


If you have enough knowledge about the tag to know that it should stay, it's not hard to come up with a suitable question that uses it.

Post such a question, use the tag, and the problem goes away - the tag stays.

  • 5
    I agree, this is the only sane solution -- if it's such a valid tag, then it should be used at least once in six months by someone else. Commented Feb 18, 2011 at 5:40

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