Architecturally, Visual Studio Code combines the best of web, native, and language-specific technologies. Using the GitHub Electron Shell, Code combines web technologies such as JavaScript and Node.js with the speed and flexibility of native apps. Code uses a newer, faster version of the same industrial-strength HTML-based editor that has powered the “Monaco” cloud editor, Internet Explorer's F12 Tools, and other projects. And Code uses a tools service architecture that enables it to use many of the same technologies that power Visual Studio, including Roslyn for .NET, TypeScript, the Visual Studio debugging engine, and more. In future previews, as we continue to evolve and refine this architecture, Visual Studio Code will include a public extensibility model that lets developers build and use plug-ins, and richly customize their edit-build-debug experience.