GitHub has revamped its Gist platform to enhance code sharing and collaboration by rewriting it from scratch with improved libraries and style guides. The updated Gist now includes features such as an enhanced Discover function for easier code browsing and a new search capability by language, as well as integration with the Ace editor for syntax-highlighted and indentation-aware editing. Users can also access the full history of every Gist, complete with diffs, and can see which forks have activity to easily find interesting updates. Overall, the new Gist aims to streamline the process of sharing and discovering code snippets and applications, offering a more robust and user-friendly experience.