Yes
I've had one 18-hour session with it and fixed 3 serious but subtle and difficult to reproduce bugs
pdimitar on Hacker News
fixed 3 serious but subtle and difficult to reproduce bugs
In the thread “I am happier writing code by hand”, replying to this comment
Helped: Carefully defining success criteria and strict testing feedback loops before running.
Got in the way: Missed important things occasionally without strict constraints.
… My colleagues use Claude Opus and it does an okay job but misses important things occasionally. I've had one 18-hour session with it and fixed 3 serious but subtle and difficult to reproduce bugs. And fixed 6-7 flaky tests and our CI has been 100% green ever since. …