Well, that's a post from 05-16-2015 for one thing. I don't find anything written in my notes, so anything I remember is suspect.
But I believe that I decided it was a sisyphean task and I didn't care enough.
It would involve, at a minimum:
- Generating the list of all 'canonical' tags (685,301 Found)
- Fetching the page(s?) for each
- Determining what do to with all the 'Tags with the same meaning' vs all the 'sub tags'
- Are 'sub tags' also 'canonical'?
- Sub tags can have sub tags...
- Tags can be 'fandom', 'characters', etc
- Tags can have 'parent' tags that are not of the same type
example
- Figuring out how and where to store all of the tag data (7,354,056 tags Found)
- ...and update it...
- ...and use it...
Now factor in that each user is still going to have their own opinion about which tags are important and which aren't and how they should be presented...
I know that in recent years I've taken to telling people that as long as AO3 allows anyone to write any tag they like, complete metadata consistency is going to be impossible.