Claude Code & Your IDE

What Is Claude Code?

Up until now on this trail, you have been working with Claude through a browser or a desktop app. You type a message, Claude responds, and you copy-paste code into your editor. That workflow works, but it has a ceiling. Every time you want Claude to actually do something with your code -- create a file, run a command, fix an error -- you are the middleman. You copy, you paste, you switch windows, you lose context.

Claude Code removes that middleman entirely.

Claude Code is a terminal-native, agentic AI assistant that lives directly in your command line. Instead of chatting in a separate window and manually transferring code, Claude Code can read your files, write new ones, run terminal commands, search your codebase, and execute multi-step tasks -- all without you leaving your development environment.

The word agentic is important here. A regular chatbot waits for your input and responds. An agentic tool can take initiative. When you tell Claude Code to "add a dark mode toggle to the header," it does not just give you a code snippet. It reads your existing header component, understands your project structure, creates the toggle component, updates the header, adds the necessary CSS, and runs the dev server to make sure nothing broke. It plans, executes, and verifies.

Claude Code vs. Claude Desktop

It helps to understand the difference between these two tools, because they serve different purposes and they complement each other well.

Claude Desktop is like having a brilliant research partner sitting next to you. You can show it documents, ask questions, brainstorm ideas, and get detailed answers. It is wonderful for planning, writing, analysis, and creative work. It works through a visual interface -- windows, buttons, text fields.

Claude Code is like having a skilled developer sitting at your keyboard. It does not just talk about code -- it writes it, runs it, tests it, and fixes it. It works through the terminal, the same place where professional developers spend most of their time.

| Feature | Claude Desktop | Claude Code | |---|---|---| | Interface | Visual app window | Terminal / command line | | File access | Upload files manually | Reads your entire project | | Code execution | Shows you code to copy | Writes and runs code directly | | Multi-step tasks | One response at a time | Plans and executes sequences | | Project awareness | Per-conversation context | Understands full codebase | | Best for | Research, writing, planning | Building, debugging, coding |

Installing Claude Code

Getting Claude Code running takes just a few minutes. You need two things: Node.js (which you should already have from the earlier trail setup) and an Anthropic account.

Step 1: Verify Node.js

Open your terminal and check that Node.js is installed:

node --version

You should see something like v20.11.0 or higher. If you get an error, head to nodejs.org and install the LTS version first.

Step 2: Install Claude Code

Run this single command in your terminal:

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

The -g flag means "global" -- it installs Claude Code so you can use it from any directory on your machine, not just one project.

Step 3: Start Claude Code

Navigate to any project folder (or create a new one) and launch it:

mkdir my-first-project
cd my-first-project
claude

The first time you run claude, it will walk you through authentication. You will connect your Anthropic account, which gives Claude Code the ability to use Claude's AI capabilities through your account.

Step 4: Verify It Works

Once Claude Code starts, you will see a prompt where you can type. Try something simple:

> Create a file called hello.txt that says "Hello from Claude Code!"

If Claude Code creates the file and you can see it in your project folder, you are up and running.

Setting Up Your IDE Integration

Claude Code runs in the terminal, but that does not mean you need to juggle two separate windows. Both VS Code and Cursor have built-in terminals, which means you can have your code editor and Claude Code side by side in the same application.

VS Code Setup

VS Code is free, open-source, and the most popular code editor in the world. Here is how to set it up for the best Claude Code experience:

1. Open VS Code and navigate to your project folder (File > Open Folder)
2. Open the integrated terminal with the keyboard shortcut Ctrl+` (backtick) on Windows/Linux or Cmd+` on Mac
3. Run claude in the terminal panel
4. You now have your file explorer on the left, your code in the center, and Claude Code at the bottom

# In the VS Code integrated terminal:
claude

Cursor Setup

Cursor is a code editor built specifically for AI-assisted development. It is based on VS Code, so the setup is almost identical:

1. Open Cursor and navigate to your project folder
2. Open the integrated terminal with Cmd+` or Ctrl+`
3. Run claude in the terminal panel

Cursor also has its own built-in AI features (Cursor Tab, Cmd+K, Composer). These can work alongside Claude Code. Some people use Cursor's inline AI for quick edits and Claude Code for larger, multi-file tasks.

Your First Agentic Coding Session

Let us put this all together with a real exercise. You are going to ask Claude Code to do something that would normally take you 15 minutes of manual work, and watch it happen in seconds.

mkdir claude-code-test
cd claude-code-test

claude

> Initialize a new Node.js project with a package.json, create an
  index.js file that starts an Express server on port 3000 with a
  single route that returns "Hello, world!", and add a .gitignore
  file appropriate for a Node.js project.

node index.js

Notice what just happened. You described what you wanted in plain English, and Claude Code did the rest. It did not just give you code to copy -- it created files, installed packages, and set up a working project. That is the agentic difference.

How to Talk to Claude Code

Claude Code understands natural language, but there are patterns that get better results. Here are some practical tips:

Be specific about what you want changed:

> Add a /health endpoint to the Express server that returns
  { status: "ok", timestamp: current time } as JSON

Reference files by name when you can:

> In index.js, add error handling middleware that catches
  unhandled errors and returns a 500 status

Ask it to explain what it is doing:

> Explain the changes you just made to package.json

Use it for debugging:

> I am getting "Cannot find module express" when I run
  node index.js. Diagnose and fix the issue.

The Terminal Is Your Friend

If you have never used a terminal before, Claude Code is actually a wonderful way to learn. Instead of memorizing commands, you can describe what you want in plain language and watch the commands Claude Code runs. Over time, you will start recognizing common patterns.

Here are the terminal basics you will encounter most often:

# Navigate into a folder
cd my-project

# List files in the current folder
ls

# See where you are
pwd

# Create a new folder
mkdir new-folder

# Run a Node.js file
node filename.js

# Install a package
npm install package-name

# Start a dev server (varies by project)
npm run dev

You do not need to memorize these right now. Claude Code will use them for you, and you will pick them up naturally.

Common Questions