Cline

Cline (formerly Claude Dev) is an open-source autonomous coding assistant that operates directly inside Visual Studio Code. Designed to act as a human-supervised AI developer, Cline can inspect project directories, write code across multiple files, run terminal commands, and use a browser to verify web interfaces. Developers use Cline to handle end-to-end development tasks, from implementing new API endpoints to debugging build errors and writing unit tests. Because Cline asks for explicit user permission before executing terminal commands or modifying files, developers maintain total control over their local development environment. What makes Cline unique is its combination of terminal execution, file system access, and web browsing capabilities within VS Code. The extension is free and open-source, allowing users to connect their preferred API keys (including Anthropic, OpenAI, or local models via Ollama) and pay only for actual token usage. For FutureStack, Cline belongs in Coding because it provides autonomous programming and editor integration. It is best for software engineers, full-stack builders, and indie hackers who want a capable AI coding agent inside VS Code.