Ask HN: LLM for Browser Inspector/DevTools/DOM?

Has anyone built a LLM that lives inside the browser dev-tools? I want to be able to ask questions about my current DOM. i.e. "Why is this element not centred" or "what's adding the space below this?"

I can somewhat do this in cursor, but it doesn't have the full DOM, just the current page. CSS from other files or dynamic content leave a big gap in it's context.