Add OpenClaw local and Mac mini setup skill

infrastructure/local-ai/mac-mini-llm-lab/SKILL.md

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+---
+name: mac-mini-llm-lab
+description: Configure a Mac mini as a reliable local LLM server with remote access, observability, and power-safe operation.
+license: MIT
+metadata:
+  author: devops-skills
+  version: "1.0"
+---
+
+# Mac mini LLM Lab
+
+Turn a Mac mini into a low-noise, always-on local AI appliance.
+
+## System Setup
+
+1. Update macOS and Xcode command line tools.
+2. Install Homebrew and core packages (`tmux`, `htop`, `ollama`).
+3. Enable automatic login and restart-after-power-failure.
+4. Configure Tailscale or WireGuard for remote access.
+
+## Reliability Checklist
+
+- Keep device on wired Ethernet.
+- Use UPS for power protection.
+- Schedule weekly reboot window.
+- Add launchd service for Ollama auto-start.
+
+## Security Checklist
+
+- Disable unnecessary sharing services.
+- Enforce FileVault and strong local admin password.
+- Restrict SSH to key-based auth only.
+
+## Related Skills
+
+- [ollama-stack](../ollama-stack/) - Local inference software stack
+- [ssh-configuration](../../servers/ssh-configuration/) - Secure remote shell access