What's this about?
A developer routed GitHub Copilot's network traffic through a man-in-the-middle proxy to see exactly what it sends to the server and how its prompts are constructed — a rare concrete peek inside a commercial coding assistant.
What exactly is a "MitM proxy"?
A man-in-the-middle proxy sits between an app and the internet and lets you inspect (and modify) the traffic passing through. Used defensively here, it's a way to observe what Copilot actually transmits — your code context, the hidden system prompts, the request format — rather than guessing from the outside.
Why it matters
It demystifies how a closed coding agent really works under the hood, which matters both for privacy (what code leaves your machine) and for anyone trying to build or reason about similar tools.