> Something I'm starting to struggle with is when agents can now do longer and more complex tasks, how do you review all the code?

Same as before. Small PRs, accept that you won't ship a month of code in two days. Pair program with someone else so the review is just a formality.

The value of the review is _also_ for someone else to check if you have built the right thing, not just a thing the right way, which is exponentially harder as you add code.