Autonomous coding agent for VS Code. The fastest-growing AI open-source project (GitHub Octoverse 2025).
Cline is an autonomous coding agent that runs directly in VS Code. It features dual "Plan" and "Act" modes — Plan mode for designing approaches and Act mode for autonomous implementation. Recognized by GitHub Octoverse 2025 as the fastest-growing AI open-source project with 4,704% year-over-year contributor growth. Supports any LLM provider (OpenAI, Anthropic, local models), can create/edit files, run terminal commands, and browse the web.