Initial skills documentation — 25 categories, all SKILL.md + references + scripts

skills/devops/ops-portal-and-collector/references/vps-threshold-alerting.md

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+# VPS Threshold Alert System — Jul 2026
+
+Automated monitoring system that checks RAM, disk, and CPU usage across all 10 servers every 15 minutes.
+
+## Script
+`/root/.hermes/scripts/vps-threshold-check.sh` (chmod 755)
+
+## Cron job
+`vps-threshold-check` — runs every 15 min, no_agent mode (stdout delivered as Telegram message)
+
+## Servers monitored (10 total)
+- 9 Hetzner servers (SSH via itpp-infra key, 5s timeout per host)
+- 1 local (core, netcup RS 2000)
+
+## Thresholds
+| Metric | Warning (80%) | Critical (90%) | Emergency (95%) |
+|--------|-------------|---------------|-----------------|
+| Disk | 80% | 90% | 95% |
+| RAM | 80% | 90% | 95% |
+| CPU load | 80% cores utilized | 90% | 95% |
+
+## Alert tracking
+`/root/.hermes/data/threshold-alerts.json` — keys format: `{hostname}_{metric}_{threshold}`
+- 24-hour cooldown per key
+- Auto-resets when metric drops below threshold
+- Re-alerts if metric crosses again after cooldown
+
+## Alert format (Telegram)
+```
+🚨 VPS Alert: ai.itpropartner.com
+  ⚠️ DISK at 92% (threshold: 90%)
+  ⚠️ RAM at 83% (threshold: 80%)
+```
+
+Multiple thresholds on one server are combined into a single message.