I remember asking claude in claude code why the "seams" and it instantly in very fine detail said how it's from a book on working with legacy code

so they might be RLHFing on these specific approaches and then it becomes the entire model

just an anecdote but I found it interesting how it went full on that it's from that book vs just "it's technical jargon"

AI model does not know special insight into how model itself was trained. All it tells you is it's prediction of expected explanation.