How to Use GitHub Copilot Chat

GitHub Copilot Chat brings conversational AI directly into your development environment, allowing you to ask questions, get code explanations, and receive debugging help without leaving your IDE. This interactive feature transforms how you write and understand code.

1. Install GitHub Copilot Chat extension. Open VS Code and navigate to Extensions (Ctrl+Shift+X on Windows/Linux, Cmd+Shift+X on Mac). Search for 'GitHub Copilot Chat' and click Install. You must have an active GitHub Copilot subscription and the base GitHub Copilot extension already installed.
2. Authenticate your GitHub account. Click the GitHub Copilot Chat icon in the Activity Bar or press Ctrl+Shift+I (Cmd+Shift+I on Mac). Select 'Sign in to GitHub' when prompted. Complete the authentication process in your browser and return to VS Code to confirm the connection.
3. Open the Chat panel. Access Copilot Chat through the dedicated panel in the Side Bar or press Ctrl+Shift+I (Cmd+Shift+I on Mac). The chat interface appears as a text input field with conversation history above. You can also right-click in any code file and select 'Copilot Chat' for contextual assistance.
4. Ask questions about your code. Type questions directly into the chat input. Ask about specific functions, request explanations of complex code blocks, or inquire about best practices. Copilot Chat understands your current file context and workspace, providing relevant answers based on your project.
5. Generate code with natural language. Describe what you want to build in plain English. For example, type 'Create a function that validates email addresses' or 'Write a REST API endpoint for user authentication'. Copilot Chat generates code snippets that you can insert directly into your files.
6. Get debugging assistance. Highlight problematic code and ask Copilot Chat to identify issues. Type questions like 'Why is this function not working?' or 'How can I optimize this loop?' The AI analyzes your code and provides debugging suggestions with explanations.
7. Insert generated code into your files. Click the 'Insert at Cursor' button on any code block that Copilot Chat generates, or copy the code manually. The suggested code appears at your current cursor position in the active editor. Review and modify the generated code as needed for your specific requirements.