It's small things and reassuring myself, most of the time. Sometimes I let it scaffold basic tests for React components ("assume a working Jest testing setup, use @testing-library/react" does quite some work there). Sometimes I have some logical conditions where it takes me a minute more than expected to make sure I get the logic. I'll have ChatGPT explain what that code does, just to make sure I'm not running into some stupid errors my caffeine-lacking brain produced.