cmux

Cloud VMs for development - spawn isolated dev environments instantly.

Installation

npm install -g cmux

Quick Start

# Login
cmux login

# Create a VM
cmux start                     # Returns ID like cmux_abc123

# Access the VM
cmux code cmux_abc123          # Open VS Code in browser
cmux ssh cmux_abc123           # SSH into VM

# Run commands
cmux exec cmux_abc123 "npm install"

# Manage lifecycle
cmux pause cmux_abc123         # Pause (preserves state)
cmux resume cmux_abc123        # Resume
cmux delete cmux_abc123        # Delete permanently

# List all VMs
cmux ls

Commands

| Command | Description | |---------|-------------| | cmux login | Login via browser | | cmux start [path] | Create new VM, optionally sync directory | | cmux ls | List all VMs | | cmux code <id> | Open VS Code in browser | | cmux vnc <id> | Open VNC desktop in browser | | cmux ssh <id> | SSH into VM | | cmux pty <id> | Open interactive terminal | | cmux exec <id> "cmd" | Execute command | | cmux sync <id> <path> | Sync files to VM | | cmux pause <id> | Pause VM | | cmux resume <id> | Resume VM | | cmux delete <id> | Delete VM |

Browser Automation

Control Chrome in the VNC desktop:

cmux computer open cmux_abc123 https://example.com
cmux computer snapshot cmux_abc123       # Get interactive elements
cmux computer click cmux_abc123 @e1      # Click element
cmux computer type cmux_abc123 "hello"   # Type text
cmux computer screenshot cmux_abc123     # Take screenshot

Platform Support

• macOS (Apple Silicon & Intel)
• Linux (x64 & ARM64)
• Windows (x64)

License

MIT