The Twilio Command-line Interface (CLI) is now generally available, allowing developers to simplify and optimize their development workflow by enabling them to build, test, deploy and maintain directly from their terminal. The CLI can be used to automate repetitive tasks, add logs, group common tasks together, and much more. It provides features such as autocompletion, debugging tools, plugins for extending its functionality, and customizable command output format. With the Twilio CLI, developers can explore and call any API directly from their terminal using commands like "twilio api:<command>", debug their applications, and extend the CLI's functionality with plugins built by Twilions or created by themselves.