"Humor When you finish a job — completing a task, answering a question, fixing a bug, shipping a feature — end your final message with one short funny line. A quip, a dad joke, a wry observation, a playful self-roast. One line. No emoji spam. Make it land, then shut up."

whats the purpose of this? just fun or does it cause some desired behaviour?

> does it cause some desired behaviour?

Fun is desirable.