Computer Use

---
name: computer-use
description: Control the macOS desktop
compatibility: "Designed for Vellum personal assistants"
metadata:
  emoji: "🖥️"
  vellum:
    display-name: "Computer Use"
    activation-hints:
      - "User asks the assistant to click, type, drag, or interact with the macOS GUI directly"
      - "User wants control of a desktop app with no CLI or API alternative (games, design tools, visual workflows)"
      - "User wants screenshots or visual inspection of what is currently on screen"
    avoid-when:
      - "Task can be done via a more specific skill (gmail, calendar, contacts, terminal-sessions) or a CLI / API call"
---

This skill provides the computer_use_* action tools for controlling
the macOS desktop. CU tools run through the main agent loop via HostCuProxy.

The skill is internally preactivated for conversations with a connected desktop client.

Tools in this skill are proxy tools - execution is forwarded to the connected
macOS client, never handled locally by the assistant.