Treehouse is an actively developed frontend toolkit designed to build Tana-style applications with a custom backend. It functions as both an outline editor and a repurposable workbench shell, enabling developers to create sophisticated note-taking and knowledge management tools. The software is built entirely on the Deno toolchain, ensuring zero Node.js utilization and maintaining minimal dependencies primarily relying on Mithril.js for performance and simplicity. Users can deploy their own backend while utilizing Treehouse as the frontend interface, offering a flexible foundation for personalized productivity apps. A live demo is available to showcase current capabilities, and the project encourages community contribution through open-source development on GitHub. The development workflow involves installing Deno and running built-in tasks to serve a local development server or build a static site bundle. Live development updates are streamed on Twitch, and discussions regarding features and roadmaps are hos