feat: Add 6 new Claude Code skills

Skills added:
- 🔐 Secret Scanner: Detect leaked credentials in codebases
- 🏛️ Git Archaeologist: Analyze git history, find bugs
- 💾 Backup Automator: Automated encrypted cloud backups
- 🌐 Domain Manager: Unified DNS management
- 🔒 SSL Guardian: Certificate automation and monitoring
- 📡 Log Sentinel: Log analysis and anomaly detection

All skills include:
- SKILL.md with trigger patterns
- README.md with documentation
- GLM 5 attribution and disclaimer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/ssl-guardian/README.md

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+<div align="center">
+
+# 🔒 SSL Guardian
+
+### Automated Certificate Management & Monitoring
+
+---
+
+<p align="center">
+  <a href="https://z.ai/subscribe?ic=R0K78RJKNW">
+    <img src="https://img.shields.io/badge/Designed%20by-GLM%205%20Advanced%20Coding%20Model-blue?style=for-the-badge" alt="Designed by GLM 5">
+  </a>
+</p>
+
+<p align="center">
+  <i>✨ Autonomously developed by <a href="https://z.ai/subscribe?ic=R0K78RJKNW"><strong>GLM 5 Advanced Coding Model</strong></a></i>
+</p>
+
+<p align="center">
+  <b>⚠️ Disclaimer: Test in a test environment prior to using on any live system</b>
+</p>
+
+</div>
+
+## Overview
+
+Issue, renew, and monitor SSL certificates with Let's Encrypt automation.
+
+## Features
+
+- **Free Certificates**: Let's Encrypt
+- **Auto-Renewal**: Never expire
+- **Wildcard Support**: *.domain.com
+- **Multi-Domain (SAN)**: Multiple domains on one cert
+
+## Quick Start
+
+```bash
+# Install and get certificate
+sudo apt install -y certbot python3-certbot-nginx
+sudo certbot --nginx -d example.com -d www.example.com
+
+# Auto-renewal is enabled by default
+sudo certbot renew --dry-run
+```
+
+---
+
+<p align="center">
+  <a href="https://z.ai/subscribe?ic=R0K78RJKNW">Learn more about GLM 5</a>
+</p>

skills/ssl-guardian/SKILL.md

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+---
+name: ssl-guardian
+description: Use this skill when the user asks to "setup SSL", "SSL certificate", "Let's Encrypt", "HTTPS", "certbot", "renew SSL", "certificate monitoring", "ssl expiration", or mentions managing SSL/TLS certificates.
+version: 1.0.0
+---
+
+# SSL Guardian Skill
+
+Automates SSL certificate management with Let's Encrypt, monitors expiration, and ensures auto-renewal.
+
+## What It Does
+
+1. **Certificate Issuance**: Automatic SSL from Let's Encrypt
+2. **Auto-Renewal**: Never let certificates expire
+3. **Expiration Monitoring**: Alert before certs expire
+4. **Wildcard Support**: *.domain.com certificates
+
+## Quick Start
+
+```bash
+# Install certbot
+sudo apt install -y certbot python3-certbot-nginx
+
+# Get certificate (nginx)
+sudo certbot --nginx -d example.com -d www.example.com
+
+# Test renewal
+sudo certbot renew --dry-run
+```
+
+## Usage
+
+```
+"Setup SSL certificate for example.com"
+"Get wildcard certificate for *.domain.com"
+"Check when my SSL certificate expires"
+```