Lucille Hua introduces Diffy, a version control system for the web. Diffy is inspired by Git and IPFS, using content-addressed hashes to make files immutable and prevent 404 errors. Diffy's design would allow requests using headers to specify a base and target hash, with responses providing file diffs and hash metadata rather than full file contents. A demo of Diffy is presented to illustrate how it could provide version control of web content.