You are putting words in my mouth, I never said anything about such a stance.
The vast majority of new software is written using AI. The problem is not that it is written by AI, but rather than some people treat it like a black box. It is entirely possible to use AI to write code and verify that it is correct. Even Linus Torvalds is allowing AI generated code into the Linux kernel as long as it's managed properly.
You are referring to black-box coding, not vibe-coding. There is no strong formal definition of that word. Is there evidence that they just fired off the LLMs and didn't review or test the new bun code?
The evidence that they didn't review it, is that a million line rewrite was merged 8 days after it began being written. It's simply not possible for a team that size to review that much code in that little time.
As far as testing - yes, they do have a test suite that it was checked against during the rewrite, but that still means that any behaviour that wasn't strictly tested for by that suite could have changed and it would still pass.
The vast majority of new software is written using AI. The problem is not that it is written by AI, but rather than some people treat it like a black box. It is entirely possible to use AI to write code and verify that it is correct. Even Linus Torvalds is allowing AI generated code into the Linux kernel as long as it's managed properly.