Software engineering is not about typing. The LLM would write the unit tests based on the implementation you provide. Regardless of the LLM's output, you'd be expected to read and understand it before committing, or at the very least, review, refactor, tweak, etc. Reading is crucial for both personal and cognitive development. That is not vibe coding! There are top devs in the industry using them in top applications, such as Ghostty or Bun. The biggest names in the scene! The reality is that you would not know if your favourite app was partially or fully built with LLM help, sorry to disappoint!