I participated in the Nvidia + Vercel 2 hour hackathon in SF tonight, and built something I've wanted, but hadn't tried building.
I implemented an MCP Server and VS Code extension to allow Claude Desktop to place breakpoints, step through code, and execute expressions (assuming language support).
So you can ask it a question that requires actually stepping through the code and now it can actually do that - check values for you, etc.
It's _definitely_ not perfect. Have improvements? Please make a PR!