I vibe-slopped a small and local forms application for my family. I explicitly mentioned that fact to the LLM.

Yet, I removed 2/3s of the code, because it triple-checked that every file really existed and was valid, that the input form was less than a million bytes in size, that there were propper HTTP status codes for everything, and that every possible error from reading data was eagerly checked and caught.

Like come on, a grand total of three people will ever look at it.