Happy

Code on the go controlling claude code from your mobile device.

Free. Open source. Code anywhere.

Installation

npm install -g happy-coder

Usage

happy --server-url https://api.example.com

This will:

1. Start a Claude Code session
2. Display a QR code to connect from your mobile device
3. Allow real-time session sharing between Claude Code and your mobile app

Commands

• happy auth – Manage authentication
• happy codex – Start Codex mode
• happy connect – Store AI vendor API keys in Happy cloud
• happy daemon – Manage background service
• happy doctor – System diagnostics & troubleshooting

Options

• -h, --help - Show help
• -v, --version - Show version
• --server-url <url> - Required server URL
• --webapp-url <url> - Web auth URL (required for web authentication)
• -m, --model <model> - Claude model to use (default: sonnet)
• -p, --permission-mode <mode> - Permission mode: auto, default, or plan
• --claude-env KEY=VALUE - Set environment variable for Claude Code (e.g., for claude-code-router)
• --claude-arg ARG - Pass additional argument to Claude CLI

Environment Variables

• HAPPY_WEBAPP_URL - Web auth URL (required for web authentication)
• HAPPY_HOME_DIR - Custom home directory for Happy data (default: ~/.happy)
• HAPPY_DISABLE_CAFFEINATE - Disable macOS sleep prevention (set to true, 1, or yes)
• HAPPY_EXPERIMENTAL - Enable experimental features (set to true, 1, or yes)

Requirements

• Node.js >= 20.0.0
  • Required by eventsource-parser@3.0.5, which is required by @modelcontextprotocol/sdk, which we used to implement permission forwarding to mobile app
• Claude CLI installed & logged in (claude command available in PATH)

License

MIT