SVG is so versatile, the „hidden“ features like embedded html, iFrames, always funny to play with them. Sometimes in productive ways, sometimes for fun or for fun and profit like bugbounty hunting.
Hahaha. Great work.
The SVG posters are cool, if you're looking for some feedback try to find some way to reduce the lag on the site when previewing them. In Safari on a M1 the site slows to a crawl once the poster SVG is loaded, each click takes several seconds to register. Maybe you could do a low res server side rendered version? That could you let users preview their repos without them being able to just right-click the SVG as well