Device Control

Device Control Skill

Control device volume, brightness, and applications via command line. Supports Linux, macOS, Windows, and WSL.

Security

All inputs are validated and sanitized to prevent command injection:

• Volume/brightness values must be numbers between 0-100
• App names are restricted to alphanumeric characters, spaces, dashes, and underscores
• Shell metacharacters are blocked

Tool API

device_control

Execute a device control action.

• Parameters:
  • action (string, required): One of set_volume, change_volume, set_brightness, open_app, close_app.
  • value (string/number, optional): The value for the action (0-100 for volume/brightness, delta for change_volume).
  • app (string, optional): The application name or path (required for open/close actions).

Usage:

# Set volume to 50%
node skills/device-control/ctl.js --action set_volume --value 50

# Change volume by +10 or -10
node skills/device-control/ctl.js --action change_volume --value 10
node skills/device-control/ctl.js --action change_volume --value -10

# Set brightness to 75%
node skills/device-control/ctl.js --action set_brightness --value 75

# Open an application
node skills/device-control/ctl.js --action open_app --app "firefox"
node skills/device-control/ctl.js --action open_app --app "Visual Studio Code"

# Close an application
node skills/device-control/ctl.js --action close_app --app "firefox"

Platform Support

Requirements

• Linux: pactl (PulseAudio) or amixer (ALSA), brightnessctl (optional, for brightness)
• macOS: Built-in osascript, brightness CLI tool (optional, for brightness)
• Windows/WSL: nircmd.exe for volume control (download from nirsoft.net)