When your startup runs out of actual job titles but still needs to attract talent in this economy. Nothing says "we're totally not going to crash and burn in 6 months" like calling everyone a "Vibe Something." Next up: "Vibe Investor Relations" for when you need to explain why the money's gone.
The best part? Someone actually took the time to write this into production code. Probably the "Vibe Code Reviewer" was too busy maintaining the office kombucha tap.