Invisible Bugs

In code reviews, the easiest thing to do is verify that something works. You check the logic, run the tests, maybe click through a few UI flows—and if it behaves as expected, you approve. Most code reviews stop at the surface: does it work, do the tests pass, does the feature behave as expected? It’s easy to approve code that looks functional and polished.

But the most important issues in software aren’t obvious at first glance. The real weight of a review lies in catching what doesn’t break no...