nimakian/github-unfollower ? reverse-engineered prompt

Build me a simple web app that helps me find GitHub users who I follow but who do not follow me back, and also people who follow me that I am not following back.

I want it to feel clean and easy to use, with a responsive layout that works well on mobile too. It should let me sign in with a GitHub personal access token for larger accounts, and keep that token stored only in the browser, not sent anywhere else. It should be able to handle very large follower and following lists, even if the analysis takes a while, and show the results clearly once it is done.

Make the experience straightforward, with a short explanation of what it does, a place to enter the token, and clear lists or counts for both sides of the comparison. If you need to look up current GitHub API details online while building it, go ahead and do that.