Skip to content
BSWEN
Blog

How to Use Claude Code Inside Cursor IDE: Setup Guide for 2026

Cowrie
Cowrie
Dev @ Bswen

Claude Code and Cursor IDE Integration

I kept seeing people say “Claude Code is just a CLI tool” and I’d have to choose between Cursor’s sleek GUI and Claude Code’s powerful agent capabilities. Turns out, I was wrong on both counts.

Let me show you how to run Claude Code inside Cursor IDE—it’s simpler than you’d think.

The Problem

I love Cursor’s IDE. The tab completions, the chat sidebar, the CMD+K edits—it’s my daily driver. But when I needed autonomous agents that could plan, execute, and iterate on complex tasks, I kept reaching for Claude Code in the terminal.

The context switching was killing my workflow:

+------------------+          +------------------+
|   Cursor IDE     |          |   Terminal      |
|                  |   <-->   |                  |
|  GUI, edits,    |  switch  |  Claude Code    |
|  completions     |  tabs    |  CLI agent      |
+------------------+          +------------------+
         |                           |
         v                           v
   Productive                Productive
        \                         /
         \------- FRICTION ------/

Every time I needed Claude Code’s agent capabilities, I’d context-switch to terminal. Then back to Cursor for edits. Then back to terminal. Rinse, repeat.

The Solution: Claude Code VSCode Extension in Cursor

Here’s what I didn’t know until I dug into a Reddit thread: Claude Code has official VSCode and Cursor plugins. You can run Claude Code as a sidebar inside Cursor.

Step 1: Install the Extension

In Cursor, open the Extensions panel (CMD+SHIFT+X or click the extensions icon):

Extensions Panel
|
+-- Search: "Claude Code"
|
+-- Found: "Claude Code" by Anthropic
|   |
|   +-- [Install] button
|
+-- After install:
    +-- Claude icon appears in sidebar

Alternatively, search for “Anthropic” to find the official extension.

Step 2: Authenticate

Once installed, you’ll see a Claude icon in your sidebar. Click it:

+----------------------------------+
|  Claude Code                     |
+----------------------------------+
|                                  |
|  Welcome to Claude Code          |
|                                  |
|  [Sign in with Anthropic]        |
|                                  |
|  First time? You'll need an      |
|  Anthropic API key.              |
|                                  |
+----------------------------------+

The extension will guide you through authentication. If you’ve used Claude Code CLI before, it may pick up your existing credentials.

Here’s where things get interesting. If you’ve been using Cursor’s AI features with a .cursorrules file, you can mirror those settings for Claude Code:

.cursorrules (for Cursor’s built-in AI):

Use concise responses. No sycophancy. Challenge assumptions.
Always explain WHY, not just WHAT.

CLAUDE.md (for Claude Code):

Use concise responses. No sycophancy. Challenge assumptions.
Always explain WHY, not just WHAT.

I keep both files in sync so whether I’m using Cursor’s chat or Claude Code’s agent, I get consistent behavior.

Three Integration Patterns

I’ve experimented with a few workflows. Here’s what works:

Pattern 1: Sidebar Only (My Default)

+------------------------------------------+
|  Cursor IDE                              |
| +----------+ +------------------------+  |
| |          | |                        |  |
| | Claude   | |   Your Code            |  |
| | Code     | |                        |  |
| | Sidebar  | |   Full editing         |  |
| |          | |   experience           |  |
| | Chat,    | |                        |  |
| | Diff,    | |                        |  |
| | Agent    | |                        |  |
| +----------+ +------------------------+  |
+------------------------------------------+

Best for: Most tasks. You get full agent capabilities without leaving Cursor.

Pattern 2: Terminal in Cursor

Sometimes I want multiple Claude Code instances:

+------------------------------------------+
|  Cursor IDE                              |
| +----------+ +------------------------+  |
| |          | |                        |  |
| | Claude   | |   Terminal            |  |
| | Code     | |   +------------------+  |  |
| | Sidebar  | |   | $ claude         |  |  |
| |          | |   | > Working on...   |  |  |
| +----------+ |   +------------------+  |  |
|              +------------------------+  |
+------------------------------------------+

I use Cursor’s integrated terminal (CTRL+`) to run Claude Code CLI alongside the sidebar. This lets me have two agent instances working on different things.

Pattern 3: Dual Instance Strategy

For complex projects, I sometimes run:

  1. Sidebar: For interactive editing, quick questions, file operations
  2. Terminal (in Cursor): For long-running autonomous tasks that I don’t want to interrupt
  3. Cursor’s Built-in Chat: For quick tab completions and CMD+K edits
            +------------------------+
            |    Cursor IDE          |
            +------------------------+
            |                        |
   +--------+--------+    +---------+--------+
   | Claude Code     |    | Claude Code CLI  |
   | Sidebar         |    | (Terminal)       |
   |                 |    |                  |
   | Interactive     |    | Autonomous       |
   | Quick edits      |    | Long tasks       |
   +-----------------+    +------------------+
            |                        |
            +-------- Parallel -------+

This is overkill for most situations, but when I’m refactoring a large codebase while simultaneously working on a new feature, having multiple agents helps.

What You Get in the Sidebar

The Claude Code sidebar isn’t just chat. It includes:

Chat Interface - Standard conversation with context awareness

Context Engineering - Select files, directories, or specific code sections for the agent to work with

Diff Views - See proposed changes before accepting them

Agent Planning - For complex tasks, Claude Code creates a plan and executes step by step

File Operations - Create, edit, delete files with preview

Common Mistakes to Avoid

Mistake 1: Not knowing the plugin exists

I talked to several developers who thought Claude Code was CLI-only. The VSCode/Cursor extension has been available for a while—don’t miss out.

Mistake 2: Not mirroring configuration

If you have custom rules in .cursorrules, create a matching CLAUDE.md. This ensures consistent behavior whether you use Cursor’s AI or Claude Code’s agent.

Mistake 3: Ignoring the terminal option

Sometimes CLI is actually better for certain tasks—long-running operations, scripted workflows, or when you want a clean separation between agent sessions.

Mistake 4: Using only one

The power is in combining them. Use Cursor’s built-in AI for quick completions and Claude Code sidebar for complex multi-step operations.

Verification Checklist

After setup, verify everything works:

[ ] Claude Code icon appears in Cursor sidebar
[ ] Authentication successful (shows your account)
[ ] Can send a message and get a response
[ ] File context selection works
[ ] Diff preview shows for code changes
[ ] .cursorrules and CLAUDE.md are in sync (if using)

When CLI Still Makes Sense

The sidebar is great, but I still drop to terminal for:

  • Background tasks: Long-running refactoring that I want to monitor occasionally
  • Multiple projects: Quickly switching between codebases
  • Scripting: Automated workflows with claude --command
  • CI/CD integration: Running Claude Code in pipelines

The terminal isn’t going away—it’s just one option in the toolkit.

Summary

Don’t choose between Cursor and Claude Code. Use Claude Code as a plugin inside Cursor:

  1. Install the Claude Code extension from Cursor’s marketplace
  2. Authenticate with your Anthropic account
  3. Mirror .cursorrules to CLAUDE.md for consistent behavior
  4. Use sidebar for interactive work, terminal for background tasks

You get Cursor’s excellent GUI plus Claude Code’s autonomous agent capabilities—all in one window.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!

Comments

Tags: