Cline

Cline is an open-source VS Code extension that acts as an autonomous agent — creating and editing files, running terminal commands, and even using a browser — while showing exactly what it plans to do before it does it.

Why it stands out

• Model-agnostic. Works with Claude, GPT, local models via Ollama, or any OpenAI-compatible endpoint.
• Human-in-the-loop by default. Every file edit and command requires explicit approval unless you turn on auto-approve.
• Fully open source, so the whole agent loop is auditable.

Good for

Developers who want agentic capabilities without vendor lock-in, and who value transparency into every action the agent takes.