Well, answering myself... Looks like it uses the Electron Shell project which was part of Atom https://thenextweb.com/apps/2015/04/30/microsofts-cross-platform

Well, answering myself... Looks like it uses the Electron Shell project which was part of Atom https://thenextweb.com/apps/2015/04/30/microsofts-cross-platform-visual-studio-code-app-is-based-on-githubs-atom-editor/ https://thenextweb.com/apps/2015/04/30/microsofts-cross-plat...