How to Use Cline in 2026: Step-by-Step Guide
Open-source autonomous AI coding agent for VS Code that can write, edit, and run code with full file system access using any LLM API you provide.
Cline (formerly Claude Dev) is an open-source autonomous coding agent that runs inside VS Code and can be paired with any LLM API — Claude, GPT-4, DeepSeek, Gemini, or local models via Ollama. Unlike AI code completion tools that suggest inline changes, Cline operates at the agent level: it can read and write any file in your project, execute terminal commands, use browser automation to test web applications, and work through complex multi-step engineering tasks with minimal intervention. The user approves each significant action before Cline executes it, keeping a human in the loop. Cline is free to use (MIT license) — you bring your own API keys and pay provider costs directly, which makes it significantly cheaper than proprietary tools like Cursor or Copilot for heavy users. With over 25,000 GitHub stars, it is one of the fastest-growing AI coding tools of 2025-2026. Its standout feature is the combination of full-codebase access, browser testing capability, and support for nearly every major AI model.
What You'll Need
- A Cline account (free to create)
- A modern web browser or the Cline app
Getting Started
Create Your Account
Visit https://github.com/cline/cline and sign up for a free account. You'll need an email address to register.
Start Your First Conversation
Once logged in, you'll see the main chat interface. Type a question or task in the input box and press Enter. Cline supports autonomous coding, file system access, terminal execution, browser automation, multi-model support, open source, VS Code extension — start with a simple text prompt to get familiar.
Pro Tips
- Be specific: The more context you provide, the better the response. Instead of "write an email," try "write a professional follow-up email to a client who hasn't responded in two weeks."
- Iterate: If you don't get what you need, ask for clarification or refinement: "Make it shorter" or "Use a more formal tone."
- Use examples: Show Cline what format you want by including an example in your prompt.
- Save useful conversations: Most platforms let you name and revisit conversations — organize by project or topic.
Common Use Cases
Programming & Code
AI assistants focused on writing, debugging, and explaining code across programming languages.
Browse Programming & Code chatbots →Productivity
AI tools for task management, scheduling, summarization, and workflow optimization.
Browse Productivity chatbots →Troubleshooting
- Responses seem generic or unhelpful
- Add more context to your prompt. Specify the audience, tone, length, and format you need. Try starting over with a clearer description of your goal.
- The tool isn't responding or is slow
- AI chatbots can experience high traffic. Refresh the page and try again. Check the service's status page if issues persist.
- Output is too long or too short
- Explicitly specify the length: "in 100 words," "as a brief summary," or "in detail with examples."
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Frequently Asked Questions
- Is Cline free to use?
- Yes, Cline is completely free to use.
- Do I need an account to use Cline?
- You may be able to try Cline without an account, though a free account unlocks more features and saves your history.
- What can I use Cline for?
- Open-source autonomous AI coding agent for VS Code that can write, edit, and run code with full file system access using any LLM API you provide.
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