Obviously complete autotagging would be challenging, but presumably we could simplify it by instead of using the entire ~25k card list we could shorten it to every card that's been used on the site and use some kinda set arithmetic to compare a set of words in the post to words in the cards to filter them to possibilities first before doing the detailed comparisons. I'd be happy to write a POC in Python if it would help.
I think ultimately autotagging would be the *best* since it'd apply everywhere, but alternatively if we came up with a cool UI for mobile that made it easier - especially in the quick reply window - I think that'd be decent too.
A button to suggest autotags and then approve them would be super cool too but I'm not sure how feasible that UI would be
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