Install Bun and Claude Code

Two Tools. Two Commands.

You need two things installed on your computer before the bot can run. Both are free.

Install Bun

Bun is a JavaScript runtime. Think of it as the engine that runs your bot code. Without Bun, the code sits on your computer doing nothing.

Open your terminal and paste this command:

curl -fsSL https://bun.sh/install | bash

Wait for it to finish. Then close your terminal completely and open a new one. This step matters. The new terminal loads Bun into its environment. Without restarting, your computer does not know Bun exists yet.

In the new terminal, type this to confirm it worked:

bun --version

You should see a version number like 1.x.x. If you do, Bun is ready.

Install Claude Code

Claude Code is the AI that powers your entire setup. It is not a chatbot in a browser. It lives inside your terminal and works directly with your files. It reads your project, understands what needs to happen, and does it.

For the mini-setup (local mode), you need a Claude Pro ($20/month) or Max ($100-200/month) subscription — Pro to get started, Max for full power with the best models. Sign up at claude.ai if you don’t have one yet.

Note: The full course also covers VPS deployment with an Anthropic API key instead of a subscription — costs vary by usage and model selection. That’s in Module 12 (Production Deployment).

Once your subscription is active, install Claude Code by following the official installation guide. The install command is different depending on whether you are on Mac, Windows, or Linux:

Official Claude Code Installation Guide

Follow the instructions for your operating system. After it installs, type claude in your terminal and press Enter. It opens a sign-in page in your browser. Follow the prompts to connect your Claude account. When you see the Claude Code interface back in your terminal, you are ready.

That is It

Two tools installed. Bun runs the code. Claude Code builds and manages everything. The rest of the setup happens through conversation with Claude Code in the next lessons.

Time: About 5 minutes.