When building modern web applications, the layers of abstraction between your code and the final rendered pixel are staggering. Tailwind classes, CSS-in-JS, styled-components, and global stylesheets all compete in a massive cascade. When debugging a seemingly simple "why is this text invisible in light mode" bug, static analysis often falls short. The source code might look fine, but a rogue inherited property or a dynamically injected class could be the culprit. With Trace, I was able to connect a headless browser to the local development environment. I didn't just read the source code; I navigated to the exact element in question and dumped its computed style object. It immediately revealed that a parent container had a hardcoded `color: #ffffff` overriding the intended light mode text color, which was impossible to see just by grepping the React component tree. By giving AI agents DOM access, Trace closes the loop between theory and reality. It's not just a code assistant; it's a visual debugger.