Its for when you want to write an spec like "make me a todo list app", then tell your agent of choice to go have fun, and return in the morning to a fully finished app, and not care about what the code is actually doing
I’ve gotten some success iterating on the one-shot prompt until it’s less work to productionize the newest artifact than to start over, and it does have some learning benefits to iterate like this. I’m not sure if it’s any faster than just focusing on the problem directly though.