Ask the submitter to review and leave their comments first or do a peer code review with them and force them to read the code. It's probably the first time they'll have read the code as well...
I really like this, the fact that vibe coded PRs are often bad is that people don't review it themselves first, they just look at the form, and if it looks vaguely similar to what they had in their mind, they'll just hit save and not ask the LLM for corrections
