Claude Code vs VS Code Integration: Terminal CLI, Extension, and When to Use Each

Overview

Claude Code runs inside VS Code in two distinct ways: as a terminal-based CLI and as a dedicated VS Code extension. They share the same underlying model (Claude Opus 4.6, Sonnet 4.6) but differ in how they interact with your editor. The CLI operates through the integrated terminal with full shell access. The extension embeds directly into the VS Code sidebar with GUI controls and editor-aware context. This guide walks through installing both, compares their capabilities, and explains which integration fits different development workflows. It covers setup on macOS, Linux, and Windows.

Tool

Claude Code

Latest Version

1.x

Pricing

Free with Claude Pro ($20/mo), Team ($30/mo), Max ($100–200/mo)

Platforms

macOS, Linux, Windows

Last Checked

2026-04-10

Prerequisites

Before installing either integration, confirm the following:

• OS: macOS 12+, Ubuntu 20.04+ / Debian 10+, or Windows 10+ (with WSL2 for the CLI)
• VS Code: version 1.90 or later
• Node.js: v18+ (required for the CLI; check with node --version)
• Anthropic account: Claude Pro, Team, or Max subscription active
• Shell access: The CLI needs a working terminal — on Windows, that means WSL2 or Git Bash

If you plan to use only the VS Code extension, Node.js is not required. The extension handles authentication through VS Code’s built-in account system.

Step 1: Install Claude Code CLI in the VS Code Terminal

Open the integrated terminal in VS Code (Ctrl+`` or Cmd+``) and run:

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

Verify the installation:

claude --version

Launch Claude Code in your project directory:

cd /path/to/your/project
claude

On first run, it opens a browser window for authentication. After you log in, the CLI stores your session token locally. From this point, Claude Code operates directly in your terminal — reading files, running commands, editing code, and executing git operations. It has full access to your shell environment, which means it can run your test suite, start dev servers, and interact with any CLI tool you have installed.

Step 2: Install the Claude Code VS Code Extension

Open VS Code and install the extension:

1. Open the Extensions panel (Ctrl+Shift+X / Cmd+Shift+X)
2. Search for “Claude Code”
3. Click Install on the Anthropic-published extension
4. After installation, the Claude icon appears in the activity bar (left sidebar)

Alternatively, install from the command line:

code --install-extension anthropic.claude-code

Sign in through the extension’s sidebar panel. The extension authenticates via VS Code’s account system — no separate browser flow needed if you’re already logged into your Anthropic account.

Once connected, the extension shows a chat-style interface in the sidebar. It automatically detects your open workspace and active file context.

Step 3: Understand the Key Differences

The CLI and extension share the same models but diverge in workflow integration. Here’s the breakdown:

The CLI gives you unrestricted shell access. The extension gives you tighter editor integration. Neither is universally better.

Step 4: Configure CLAUDE.md for Both Integrations

Both the CLI and the extension read CLAUDE.md files for project-specific instructions. Create one in your project root:

touch CLAUDE.md

Add project context that both integrations will use:

# Project Context

- Framework: Next.js 14 with App Router
- Testing: Vitest + Playwright
- Style: Tailwind CSS, no CSS modules
- Run tests: `npm run test`
- Run dev server: `npm run dev` on port 3000

## Conventions
- Use named exports, not default exports
- Prefer server components unless client interactivity is required

This file lives in version control and applies regardless of which integration your team members use. The CLI reads it on startup. The extension reads it when the workspace opens.

Step 5: Use the CLI for Heavy Automation Tasks

The CLI excels at tasks that require deep shell interaction. Examples:

Run a full test suite and fix failures:

claude "run the test suite, identify failing tests, and fix them"

Perform a multi-file refactor with verification:

claude "rename the UserService class to AccountService across the codebase, update all imports, and run tests to confirm nothing breaks"

Non-interactive mode for CI/CD pipelines:

claude -p "review this diff for security issues" < diff.patch

The CLI can chain shell commands, inspect outputs, and iterate without GUI overhead. For tasks involving build systems, database migrations, or deployment scripts, the terminal integration is the more capable path.

Step 6: Use the Extension for Editor-Centric Work

The extension shines when you’re actively editing and want AI assistance without leaving the editor context:

• Inline diffs: The extension proposes changes as VS Code diff views. Accept or reject hunks individually.
• Active file awareness: It automatically includes your current file and selection in context. No need to specify paths.
• CodeLens integration: See Claude-suggested actions directly above functions and classes.
• Selection-based prompts: Highlight code, right-click, and send it to Claude with a specific instruction.

Typical extension workflow:

1. Open a file with a bug
2. Select the problematic function
3. In the Claude sidebar, type: “this function doesn’t handle null inputs — fix it”
4. Review the inline diff
5. Accept the change

This tight feedback loop makes the extension faster for small, focused edits. You stay in the editor the entire time.

When to Use Each: Decision Framework

Pick the CLI when:
– You need unrestricted shell access (running builds, managing containers)
– The task spans many files and requires iterative verification
– You’re working in CI/CD or headless environments
– You want to use the full skill system, hooks, and background agents

Pick the extension when:
– You’re doing focused, file-level edits
– You want automatic editor context (open files, selections, diagnostics)
– You prefer a GUI-based diff review workflow
– You’re new to Claude Code and want a lower-friction entry point

Use both simultaneously. The CLI and extension can run in the same VS Code window without conflict. A common pattern: use the extension for quick inline fixes while running a longer CLI session in the terminal for a parallel refactoring task.

Tips and Best Practices

• Use CLAUDE.md aggressively. The more project context you encode, the fewer repeated instructions you give in both integrations. Include test commands, framework versions, and code conventions.
• Set permission modes per environment. The CLI supports --allowedTools flags to restrict which tools Claude can use. In shared or production environments, limit destructive capabilities.
• Leverage the terminal for multi-step verification. The CLI can run tests after every edit automatically. The extension requires you to trigger test runs manually or through VS Code tasks.
• Keep the extension for review workflows. When reviewing PRs or reading unfamiliar code, the extension’s inline diff UI is faster than reading CLI output.
• Use claude --resume in the terminal to continue a previous conversation. The extension maintains conversation state automatically within a session but doesn’t persist across VS Code restarts by default.

FAQ