My favorite thing lately is that it's very good at resolving dependency security vulnerabilities. GitHub already does a good job at detecting and notifying which packages are vulnerable and at what versions they're fixed, and without AI, it's just a super tedious process to figure out what things all depend on that package, find a version that'll work for all of them (potentially including upgrading the things that depend on it), wire it up, test things, and make any minor changes necessary in our code.

It's not "hard" or novel--it's just tedious grunt work. I'm happy to have AI solving that one.