Looked around a lot and couldn’t see anything. If it doesn’t exist, then I guess I’ll write the greasemonkey script myself. The use case is to save wasted review time by skipping:
A) words I already know like the back of my hand
B) vocab words that I don’t think are useful
People will say that if you already know the word, what’s the harm in just quickly typing the answer. Well, if there’s even just 200 words that I choose to skip, that’s 1400 reviews – which is significant. I think many people studying Japanese intensively or living in Japan will have much more words to skip.
As for the words that I don’t think are useful, some say they do no harm in learning, but I disagree after having made the mistake of using esoteric words with Japanese natives. I understand wanikani wanted to simplify vocab definitions, but a lot of times this misleads and does harm because you make a connection to the more complicated (wrong) word when a simpler more correct word exists.