princekjha-dev/RepoChat ? reverse-engineered prompt

Build me a simple full stack web app called RepoChat. I want to paste the URL of any public GitHub repo, have the app pull in the code, break it into useful chunks, index it, and then let me ask questions in plain English about how that repo works. The answers should feel grounded in the actual code and include clear file references so I can see where the explanation came from.

I also want a one click project summary, a way to paste a code snippet and get it explained in the context of the whole repo, and an option to compare two repos side by side. Give it a clean chat style interface with a file explorer so I can browse indexed files, plus dark and light mode with the preference saved. It should remember repos that were already indexed, but also let me reindex if I want fresh data. Please include a way to export the full conversation as Markdown.

Keep the experience polished and easy to use. If you need details, look up current docs online.