> I remembered how helpful that was, so I decided to add it to my command as well.
He mentions the reason he added it, and it's a compelling enough story to be true.
Any time you have a script that needs to run for a long time or might involve destructive actions, having a way to run the script in a "tell me what you would do without actually doing it" mode is a fairly obvious user story to throw in.
This isn't something with surprising nuance like how a McDonald's milkshake serves a non-food "job to be done" during a shopper's morning commute. As evidenced by all the others in this thread pointing out other tools that do similar things, it's a fairly obvious idea to come up with after actually using a new tool.
You'd be more likely to learn about it doing product comparisons of other tools, although since there is a lot of common art for AI training to draw from, yes it is also possible to hear about it from your AI first.