Add a SuperGrok (Grok Build) setup skill for Zo

[ss251]

Summary

Add a community skill that installs and configures xAI's Grok Build CLI on a Zo Computer and authenticates it with an existing SuperGrok account through the supported device-code flow.

Motivation

Zo documents subscription-backed setup for Claude Code and Codex, but there is no equivalent discoverable workflow for SuperGrok. Users can use their subscription through the official Grok Build CLI without requiring API-key authentication.

Because a Zo Computer is a remote Linux environment, the integration should use grok login --device-auth, present the URL and one-time code to the user, and leave the OAuth credential lifecycle to the official client.

Scope

• Add Community/supergrok-setup/SKILL.md and DISPLAY.json.
• Detect an existing grok installation before installing or updating it.
• Install only from xAI's documented installer at https://x.ai/cli/install.sh.
• Use the official device-code login; never request, copy, or persist raw OAuth tokens.
• Verify the result with non-secret commands such as grok version, grok models, and grok inspect --json.
• Explain the privacy/configuration review required before opening sensitive repositories.
• Detect model credential or endpoint overrides that can route verification away from the subscription session.
• Clearly distinguish subscription-backed Grok Build access from API-key or custom-model paths that may use different billing and routing.
• Clearly state that this adds a terminal integration, not a first-class model in Zo's chat provider picker.

Acceptance criteria

• The skill follows the repository's Community skill structure and metadata requirements.
• The setup is suitable for a headless/remote Zo Computer.
• Authentication pauses for the user to complete the xAI device authorization page.
• No API key or OAuth token is declared in DISPLAY.json or printed by the workflow.
• The workflow is idempotent and does not overwrite unrelated Grok configuration.
• bun validate passes.
• The skill links to the current official xAI Grok Build documentation.

Out of scope

First-class SuperGrok support in Settings → AI Providers requires changes in Zo's private application code and is not implementable in this public registry repository.

References

• https://docs.x.ai/build/overview
• https://docs.x.ai/build/cli/reference
• https://docs.x.ai/build/enterprise#authentication
• https://docs.x.ai/build/settings
• https://docs.x.ai/build/settings/reference