I've been working on it since December. The first working prototype was a oneshot of a biggish enough prompt (for Opus 4.5). After that well, I didn't save the prompts (my bad) but I have probably prompted what... 2-3k 80-columns lines of English in Claude Code? Yeah, I guess we are in that ballpark. Sometimes it nails the new feature at first attempt, sometimes it takes a few attempts and corrections (and in that case it can definitely be frustrating)