ts. The compiler has started its transition from Haskell to Gren. The book has seen a face lift, and Zulip has been replaced by Discord.\\n\\nInterested? Let's dig in.\\n\\n## New filesystem API\\n\\n[![Robin demonstrates the new FileSystem API](https://img.youtube.com/vi/fwLP6WVLJWU/0.jpg)](https://www.youtube.com/watch?v=fwLP6WVLJWU)\\n\\nThe FileSystem API was functional, but minimal. It has been replaced by three new modules: `FileSystem`, `FileSystem.FileHandle` and `FileSystem.Path`.\\n\\n* `FileSyste