I don't think one week is enough to learn the complex business rules that some software needs to follow.

I wonder if this is part of what's clever about pitching their consultancy as slop cleanup -- nobody's likely to engage them to work on a pile of logic that's been evolving over a decade with weird load bearing corner cases. The "I just vibe coded a massive tangle" situations are more likely to be newer.

At least, one could hypothesize. Perhaps incorrectly. :)