Claude Code in VS Code: Setup Guide

This guide walks you through installing and configuring Claude Code, Anthropic’s agentic coding tool, inside Visual Studio Code. By the end, you’ll have Claude Code running as an integrated terminal command and as a VS Code extension, letting you generate, edit, and explain code directly in your editor.

What You’ll Need

• A Claude.ai or Anthropic Console account (Claude Code requires an API key or an active subscription).
• Node.js 18 or newer installed on your system.
• Visual Studio Code (any recent version) installed.
• A terminal (Command Prompt, PowerShell, or bash) for installing the CLI.

Step-by-Step

1. Install the Claude Code CLI globally
   Open your terminal and run:

   npm install -g @anthropic-ai/claude-code

   This installs the claude command globally. Verify it with claude --version.

2. Authenticate Claude Code
   In the terminal, run claude. The first launch will prompt you to log in. Choose your preferred method:
   • If you have a Claude Pro or Max subscription, select “Login to Claude.ai” and follow the browser flow.
   • If you’re using the Anthropic API, select “Anthropic Console” and paste your API key when asked.

   After authentication, you’ll see the Claude Code interactive prompt.

3. Open VS Code and launch the integrated terminal
   Open your project folder in VS Code. Press Ctrl+` (or Cmd+` on macOS) to open the integrated terminal.
4. Start Claude Code inside VS Code
   In the integrated terminal, type claude and press Enter. Claude Code will start in the terminal, and you can begin chatting with it about your codebase. It can read files, run commands, and edit files within your project.
5. Install the official VS Code extension (optional but recommended)
   Open the Extensions view (Ctrl+Shift+X), search for “Claude Code” by Anthropic, and click Install. The extension adds a dedicated sidebar panel, keyboard shortcuts, and diff views for changes Claude makes.
6. Configure the extension to use your authenticated CLI
   After installing the extension, reload VS Code (Ctrl+Shift+P > “Reload Window”). The extension should automatically detect your logged-in CLI. If not, open the Command Palette and run “Claude Code: Sign in” to authenticate again.
7. Test with a simple prompt
   In the Claude Code panel or terminal, type something like “Explain the main function in this project” or “Add error handling to the fetch call in utils.js”. Claude will read your files and respond. If you approve file edits, they will appear as diffs in the editor.

Common Mistakes

• Skipping Node.js installation – The npm install will fail if Node isn’t installed. Check with node -v first.
• Not authenticating before using the extension – The VS Code extension relies on the CLI’s login state. If you haven’t run claude at least once, the extension won’t work.
• Using the wrong terminal – The CLI must be run in the integrated terminal of VS Code, not in a separate window, to access your project files correctly.
• Forgetting to reload VS Code after installing the extension – Extensions often need a reload to activate properly.
• Assuming Claude Code has access to everything – It can only read files in the current workspace. If you ask about a file outside the project, it won’t find it.

Tips

• Use the /init command inside Claude Code to create a CLAUDE.md file that stores project-specific instructions for Claude to follow.
• Keep your API key secure – never commit it to version control. The CLI stores it in your home directory with restricted permissions.
• If you work with multiple projects, start Claude Code separately in each project folder so it stays focused on the right files.
• Use the keyboard shortcut Ctrl+Shift+Space (or Cmd+Shift+Space) to quickly open the Claude Code panel if you’ve installed the extension.
• For large codebases, give Claude specific file paths or use the “@” mention feature to point it to relevant files.

Troubleshooting

• “claude: command not found” – This means the global npm bin directory isn’t in your PATH. Reinstall with npm install -g @anthropic-ai/claude-code and check the npm global bin path (run npm bin -g). Add that path to your system PATH variable.
• Authentication fails or times out – Ensure you have a stable internet connection. Try logging out (claude logout) and logging in again. If using an API key, double-check that the key is active and has credits.
• Extension shows “No CLI found” – The extension looks for the claude command in your PATH. Restart VS Code after reinstalling the CLI. If it still fails, manually set the CLI path in VS Code settings under “Claude Code > Cli Path”.
• Claude Code is slow or unresponsive – Large projects can slow it down. Try excluding folders like node_modules by adding them to your .gitignore or using the /ignore command.
• Edits made by Claude are not saved – Claude Code only writes files when you approve its proposed changes. Look for a diff view or a prompt asking for confirmation before applying changes.
• Billing or quota issues – If you’re using the API, check your usage limits in the Anthropic Console. If you’re on a subscription, make sure your plan includes Claude Code (Pro and Max do).

Frequently Asked Questions

Do I need a paid plan to use Claude Code?

Yes, Claude Code requires either an active Claude Pro or Max subscription, or an Anthropic API account with credits. There is no free tier for the CLI.

Can I use Claude Code with other editors?

Yes, the CLI works in any terminal, so you can use it with Vim, Emacs, or even a standalone terminal. The VS Code extension is just a convenience layer.

Does Claude Code have access to my entire file system?

No. It only has access to the current working directory (the project folder you opened). It cannot read files outside that folder unless you explicitly provide the full path.

How do I update Claude Code?

Run npm update -g @anthropic-ai/claude-code to get the latest version. The VS Code extension updates automatically through the marketplace.

Is my code sent to Anthropic’s servers?

Yes, when you use Claude Code, the code snippets and prompts you send are processed by Anthropic’s servers to generate responses. Avoid including sensitive secrets or credentials in your prompts.

Can I use Claude Code offline?

No, it requires an internet connection to communicate with Anthropic’s API. There is no local mode.

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