My Junior Can Explain It. My Senior Can Defend It. The AI Just... Did It.

Ninety-four percent test coverage on our React component library. Storybook running clean. The kind of coverage that lets you sleep at night when you're responsible for components shipping across four teams. Then a designer slides into Slack. "Small change to the button component. Can we add a loading state variant?" Small change. Sure. I pulled up the file, highlighted the component, and asked GitHub Copilot to handle the refactor. Forty seconds later it had regenerated the props interface, add