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skills/site-performance-watch/SKILL.md

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+---
+name: site-performance-watch
+description: Monitoring and alerting framework for ecommerce site speed, errors, and
+  uptime.
+---
+
+# Site Performance Watch Skill
+
+## When to Use
+- Setting up proactive monitoring during campaigns or launches.
+- Investigating conversion drops tied to latency or availability issues.
+- Communicating performance incidents to merchandising and engineering teams.
+
+## Framework
+1. **KPI Stack** – FCP, LCP, CLS, TTFB, checkout API latency, error rates, uptime.
+2. **Segmentation** – device, geography, browser, promotion, traffic source.
+3. **Alerting Rules** – thresholds, aggregation windows, escalation paths, war-room triggers.
+4. **Diagnostics** – logging, tracing, screenshot/session replay hooks.
+5. **Comms Kit** – stakeholder updates, status pages, rollback plans.
+
+## Templates
+- Performance scorecard with spark lines + thresholds.
+- Incident log template with root cause, mitigation, and follow-up tasks.
+- Escalation matrix covering engineering, DevOps, merchandising, and CX leads.
+
+## Tips
+- Pair synthetic monitoring with RUM data to catch both systemic and localized issues.
+- Freeze experiment/merch changes when performance breaches critical thresholds.
+- Use alongside `diagnose-conversion-drop` to correlate experience and performance data.
+
+---