Introduction

What is Coodeen?

Coodeen is an open-source AI coding assistant that runs entirely on your machine. It provides a split-pane editor interface with an AI chat panel on the left and a live preview of your running application on the right.

npx coodeen

That's it. Your browser opens to the editor automatically.

Key Features

• Multi-model chat — Talk to OpenAI, Anthropic, or Google models about your code
• Live preview — See your running app side-by-side with the conversation
• Screenshot capture — Select any area of the preview and send it to the AI
• Session management — Switch between projects and pick up where you left off
• Auto project detection — Automatically uses the directory you run the command from
• Fully local — Your API keys, conversations, and data never leave your machine

How It Works

┌─────────────────────────────────────────────────┐
│  Coodeen (http://localhost:3099/editor/)         │
├────────────────────┬────────────────────────────┤
│                    │                            │
│   Chat Panel       │   Preview Panel            │
│                    │                            │
│   > Fix the nav    │   ┌──────────────────┐     │
│                    │   │  Your running app │     │
│   AI: I'll update  │   │    (any URL)      │     │
│   the header...    │   │                  │     │
│                    │   └──────────────────┘     │
│   [Screenshot]     │                            │
│                    │                            │
├────────────────────┴────────────────────────────┤
│  Model: gpt-4o  │  Project: ~/my-app            │
└─────────────────────────────────────────────────┘

Coodeen runs a local Hono server with a React frontend. The AI agent has full access to your filesystem — it can read, write, edit, search, and run commands in your project directory.

Next Steps