Cline

Cline is an open-source autonomous coding agent that runs as a Visual Studio Code extension; the project was originally released as Claude Dev before adopting its current name. Cline supports a plan-and-act workflow, file-system and terminal tool use, Model Context Protocol (MCP) server integration, and multiple model providers including Anthropic, OpenAI, OpenRouter, and local models served by Ollama. On the autonomy spectrum, Cline sits between assistant-mode tools that primarily answer questions in chat and terminal-native agents that operate entirely outside the editor — keeping the IDE's context while granting the agent permission to read, edit, and execute. Approval prompts before destructive actions are configurable, allowing teams to dial autonomy up or down per task.