alt Hacker NewsTried this today with 5.2. It caught a lot of problems and gave me an impressive report of its findings.
It also burned through my entire 5-hour limit in about 10 minutes. Granted, it had almost finished the whole review in those 10 minutes, so points for speed I suppose.
You really can't let it go on its own; it'll spin up fable subagents and burn through usage laughably quick. You have to specifically tell it to follow guidelines on when to use which type of subagent and let it act as orchestrator and reviewer.
It's weird they've left that as a "gotcha", and I can't think of many charitable reasons for doing so.