Everyone in the team has become simple 
    rubber-stampers for whatever the AI puts out.

1. Present a big AI PR to a fellow human for review 2. Understand a big AI PR, as a human reviewer

...is going to be a hero. This is one of the biggest unsolved problems of this new era.

I've been experimenting with this, but it's early days. My efforts are mostly along the lines of having AI generate artifacts that guide the reviewer through the PR in execution flow order, explaining the reason for changes along the way.

I don't think that's the way forward. We don't accept mega-PRs from people, why accept them from machines? The best practice of small, focused commits - whether it be from a person or a LLM - will win out in time once we're past this manic phase.