I don't vibe code, but I maintain open source projects where vibe-coded contributions are coming.

Before, I had some amount of code reviews where I would ask "why are you doing this, instead of that cleaner/easier way?" and people would usually make the change. I would assume that they probably didn't know better.

Now, I still have some amount of reviews where I ask the exact same question, and people say "that's because [your favourite agent here] did it like this". So now I consider they don't really care.

Not sure how much it changes: as a maintainer, one couldn't trust contributions before and one cannot trust them now. People were opening PRs with code that they had never tested and that did not compile before vibe coding, so that doesn't feel very different. I guess it just feels a bit more frustrating to think that you are putting more effort into reviewing than they spent... well not "coding it" but "asking their agent to make it".