Deno 1.0 is a new runtime for JavaScript and TypeScript that aims to provide a secure and efficient environment for scripting and development. It is designed to be a standalone tool, with a single executable file and no dependencies on external libraries or package managers. Deno is built on top of the V8 JavaScript engine and provides a number of features, including support for TypeScript, a secure sandbox environment, and a simple module system. The project has been under development for two years and is now ready for production use.