> Roughly every serious codebase now and forevermore will be at least mostly AI written.

There is a difference between AI written and AI authored, somewhat. Or maybe call it written vs designed.

A lot of the code written today is written by AI, even in serious projects, but the difference is that serious projects don't vibe code. They don't let the AI write whatever it thinks is best, they instead have clear requirements, established architecture, established testing frameworks, tests, CI/CD, linting and human code review.

The difference is intent; if you use AI to write the code you would have written, then nobody can tell, and it's still fully your code and you have reviewed it. That's not vibe coding.

If you let an agent autonomously plan and write code, that's different. The autonomous "Jesus take the wheel" approach results in code you wouldn't have written yourself, and might also have clear AI tells, fundamental issues (like security flaws by design, performance flaws by design, correctness flaws by design, and general maintainability issues).

This matters. I doubt anyone wants to use or read projects done the latter way.