Learn about HCL DevOps Code RealTime, a new Theia extension for developing C++ realtime applications, in this conference presentation from TheiaCon 2023. Explore the Art language's capabilities for creating stateful applications through its high-level concepts like state machines, capsules, and events. Discover both textual and graphical notations, including state diagrams, and understand how the code generator converts Art files into optimized C++ code for various target platforms. Gain insights into developing commercial Theia extensions using Xtext and GLSP technologies through practical experiences shared by Mattias Mohlin of HCL Software.