Cline — Autonomous AI Coding Agent for VS Code

What is Cline?

Cline is an autonomous AI coding agent that runs inside VS Code. Unlike simple code completion tools, Cline can create and edit files, execute terminal commands, use MCP servers, and browse the web — all with step-by-step approval so you stay in control.

Answer-Ready: Cline is an autonomous AI coding agent for VS Code that creates files, runs terminal commands, uses MCP servers, and handles multi-step development tasks with Claude, GPT, or local models. 100k+ installs and 30k+ GitHub stars.

Best for: Developers who want an AI agent embedded in their IDE with full tool access. Works with: Claude, GPT-4o, Gemini, DeepSeek, Ollama. Setup time: Under 2 minutes.

Core Features

1. File Operations

Cline reads, creates, and edits files with diffs shown for your approval:

You: "Create a REST API with Express and add tests"
Cline: Creates src/app.js, src/routes/, tests/ — each change shown for approval

2. Terminal Integration

Runs commands directly in VS Code terminal:

You: "Install dependencies and run the tests"
Cline: npm install → npm test → reads output → fixes failures

3. MCP Server Support

Connect Cline to any MCP server for extended capabilities:

// ~/Library/Application Support/Code/User/globalStorage/cline/mcp_settings.json
{
  "mcpServers": {
    "github": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-github"]
    }
  }
}

4. Browser Integration

Cline can launch a browser, take screenshots, and interact with web pages for testing and debugging.

5. Multi-Model Support

6. Custom Instructions

Set project-specific instructions in .clinerules:

Always use TypeScript strict mode.
Follow the existing project patterns.
Run tests after every code change.

FAQ

Q: How does Cline compare to Claude Code? A: Cline is VS Code-native with a GUI sidebar. Claude Code is a terminal CLI. Cline shows visual diffs; Claude Code excels at complex multi-tool workflows. Many developers use both.

Q: Is Cline free? A: The extension is free and open-source. You pay for the LLM API calls (bring your own API key).

Q: Can it handle large projects? A: Yes, Cline indexes your workspace and selectively reads relevant files to stay within context limits.