Happy

Code on the go — control AI coding agents from your mobile device.

Free. Open source. Code anywhere.

Installation

npm install -g enjoy-coding

Run From Source

From a repo checkout:

# repository root
yarn cli --help

# package directory
yarn cli --help

Usage

Claude (default)

happy

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

Gemini

happy gemini

Start a Gemini CLI session with remote control capabilities.

First time setup:

# Authenticate with Google
happy connect gemini

Commands

Main Commands

• happy – Start Claude Code session (default)
• happy gemini – Start Gemini CLI session
• happy codex – Start Codex mode
• happy acp – Start a generic ACP-compatible agent

Utility Commands

• happy auth – Manage authentication
• happy connect – Store AI vendor API keys in Happy cloud
• happy sandbox – Configure sandbox runtime restrictions
• happy notify – Send a push notification to your devices
• happy daemon – Manage background service
• happy doctor – System diagnostics & troubleshooting

Connect Subcommands

happy connect gemini     # Authenticate with Google for Gemini
happy connect claude     # Authenticate with Anthropic
happy connect codex      # Authenticate with OpenAI
happy connect status     # Show connection status for all vendors

Gemini Subcommands

happy gemini                      # Start Gemini session
happy gemini model set <model>    # Set default model
happy gemini model get            # Show current model
happy gemini project set <id>     # Set Google Cloud Project ID (for Workspace accounts)
happy gemini project get          # Show current Google Cloud Project ID

Available models: gemini-2.5-pro, gemini-2.5-flash, gemini-2.5-flash-lite

Generic ACP Commands

happy acp gemini                     # Run built-in Gemini ACP command
happy acp opencode                   # Run built-in OpenCode ACP command
happy acp opencode --verbose         # Include raw backend/envelope logs
happy acp -- custom-agent --flag     # Run any ACP-compatible command directly

Sandbox Subcommands

happy sandbox configure  # Interactive sandbox setup wizard
happy sandbox status     # Show current sandbox configuration
happy sandbox disable    # Disable sandboxing

Options

Claude Options

• -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
• --claude-arg ARG - Pass additional argument to Claude CLI

Global Options

• -h, --help - Show help
• -v, --version - Show version
• --no-sandbox - Disable sandbox for the current Claude/Codex run

Environment Variables

Happy Configuration

• HAPPY_SERVER_URL - Custom server URL (default: https://api.cluster-fluster.com)
• HAPPY_WEBAPP_URL - Custom web app URL (default: https://app.happy.engineering)
• 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)

Gemini Configuration

• GEMINI_MODEL - Override default Gemini model
• GOOGLE_CLOUD_PROJECT - Google Cloud Project ID (required for Workspace accounts)

Gemini Authentication

Personal Google Account

Personal Gmail accounts work out of the box:

happy connect gemini
happy gemini

Google Workspace Account

Google Workspace (organization) accounts require a Google Cloud Project:

1. Create a project in Google Cloud Console
2. Enable the Gemini API
3. Set the project ID:

happy gemini project set your-project-id

Or use environment variable:

GOOGLE_CLOUD_PROJECT=your-project-id happy gemini

Guide: https://goo.gle/gemini-cli-auth-docs#workspace-gca

Contributing

Interested in contributing? See CONTRIBUTING.md for development setup and guidelines.

Requirements

• Node.js >= 20.0.0

For Claude

• Claude CLI installed & logged in (claude command available in PATH)

For Gemini

• Gemini CLI installed (npm install -g @google/gemini-cli)
• Google account authenticated via happy connect gemini

License

MIT