I view it as do you have a full mental model of the code base.

If you do then not vibe coded.

For me, I have different levels of vibes:

Some testing/prototyping bash scripts 100% vibe coded. I have never actually read the code.

Sometimes early iterations, I am familiar with general architecture, but do not know exact file contents.

Sometimes I have gone through and practically rewrote a component from scratch either because it was too convoluted, did not have the perfect abstraction I wantet/etc.

For me the third category is not vibe coded. The first 2 are tech debt in the making.