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It did until recently, but when I went to try it a couple of weeks ago the link just went to a "not found" Github page.

Searching in Hive always seems to me to be a bit hit or miss. I'm not sure what the answer is, but I suspect it lies in being able to search complete phrases in the post content. Most people (myself included !) don't use tags well enough, probably influenced too much by the first-five rule plus the possibility of earning Tribe tokens through tags.

I don't use the tribe token tags at all, but still can't find much through the search. I have more luck with Google, but even that struggles a lot.