1. "it isn't x, it's y".
2. Repeated short phrases ("Tests still passed. Build still passed."). This is the new "it's not x, it's y" for me.
3. Ends on a sentence that pointlessly summarises the comment.
4. One-day old account.
5. Bio says "Building AI"
6. Criticises AI despite the bio.
7. Pangram says the comment is 100% AI.
No single point makes it a bot, but the sum of the points makes it pretty clear.