Cross-Platform Computer-Use Skill#

Use this skill when the task needs a top-level portable computer-use skill that works across macOS, Windows, and Linux without depending on any local Claude installation, private native modules, or extracted app assets.

What this skill does#

• bundles standalone platform runtimes for macOS, Windows, and Linux
• installs one top-level skill that contains all three platform payloads
• selects the correct project for the current host platform
• preserves the standalone bootstrap model: each platform runtime creates its own virtualenv and installs public Python dependencies on first real run
• keeps platform-specific limitations explicit instead of pretending the hosts behave identically

Installed layout#

After installation, assume the top-level skill lives at:

bash

~/.codex/skills/cross-platform-computer-use-skill

The bundled projects are stored under:

bash

~/.codex/skills/cross-platform-computer-use-skill/project/platforms/macos
~/.codex/skills/cross-platform-computer-use-skill/project/platforms/windows
~/.codex/skills/cross-platform-computer-use-skill/project/platforms/linux

Platform selection#

Use the helper script from the installed skill root to resolve the active platform project:

bash

bash ~/.codex/skills/cross-platform-computer-use-skill/scripts/current-project.sh

On PowerShell:

powershell

powershell -ExecutionPolicy Bypass -File $HOME/.codex/skills/cross-platform-computer-use-skill/scripts/current-project.ps1

Build#

Always build the selected platform project, not all three at once:

bash

cd "$(bash ~/.codex/skills/cross-platform-computer-use-skill/scripts/current-project.sh)"
npm install
npm run build

Run#

bash

cd "$(bash ~/.codex/skills/cross-platform-computer-use-skill/scripts/current-project.sh)"
node dist/cli.js

Validation notes#

• macOS has been real-device validated in this workspace, including GUI typing round-trip through the MCP type tool.
• Windows and Linux are implemented, built, packaged, and published, but still need end-to-end runtime validation on real hosts.
• Linux currently targets X11 first; Wayland can restrict screenshots, focus inspection, clipboard, and synthetic input.

Guardrails#

• Treat this host as trusted-local only.
• Do not tell the user to search a local Claude install for binaries or hidden assets.
• Be explicit about the current host platform and its validation status before claiming something is verified.
• Mention that current runtimes report screenshotFiltering: none, so action gating is handled at the MCP layer.