anuraghazra/github-readme-stats ? reverse-engineered prompt

Build me a small web service that creates dynamic GitHub stats images people can drop into their README files.

I want a page or endpoint where someone can pass their GitHub username and get a clean card showing things like stars, commits, pull requests, issues, and follower stats. It should also support a second card for top languages, plus options for showing or hiding certain stats, changing the theme, and tweaking the layout so it looks good on a profile page. If it makes sense, include support for pinning a few repositories and showing WakaTime style coding activity too.

Make it easy to copy the image URL into markdown, and make the cards feel polished and fast. Please add sensible defaults, caching, and a way to self host it on Vercel or something similar. Look up current docs online if you need to.