Cline is an AI assistant integrated directly into your IDE, enabling autonomous coding capabilities. It leverages the power of AI models to handle complex software development tasks step-by-step, with human-in-the-loop approval for every file change and terminal command. Cline can create and edit files, execute commands in the terminal, use the browser for web development tasks, and even extend its own capabilities through custom tools using the Model Context Protocol (MCP). It supports various API providers and offers features like context addition, checkpoints, and restoration for a safe and efficient coding experience.