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+---
+name: 'step-04b-subagent-performance'
+description: 'Subagent: Performance NFR assessment'
+subagent: true
+outputFile: '/tmp/tea-nfr-performance-{{timestamp}}.json'
+---
+
+# Subagent 4B: Performance NFR Assessment
+
+## SUBAGENT CONTEXT
+
+This is an **isolated subagent** running in parallel with other NFR domain assessments.
+
+**Your task:** Assess PERFORMANCE NFR domain only.
+
+---
+
+## SUBAGENT TASK
+
+### 1. Performance Assessment Categories
+
+**A) Response Times:**
+
+- API response times (<200ms target)
+- Page load times (<2s target)
+- Time to interactive (<3s target)
+
+**B) Throughput:**
+
+- Requests per second capacity
+- Concurrent user support
+- Database query performance
+
+**C) Resource Usage:**
+
+- Memory consumption
+- CPU utilization
+- Database connection pooling
+
+**D) Optimization:**
+
+- Caching strategies
+- CDN usage
+- Code splitting/lazy loading
+- Database indexing
+
+---
+
+## OUTPUT FORMAT
+
+```json
+{
+  "domain": "performance",
+  "risk_level": "LOW",
+  "findings": [
+    {
+      "category": "Response Times",
+      "status": "PASS",
+      "description": "API endpoints respond in <150ms (P95)",
+      "evidence": ["Load testing results show 140ms P95"],
+      "recommendations": []
+    },
+    {
+      "category": "Caching",
+      "status": "CONCERN",
+      "description": "No CDN for static assets",
+      "evidence": ["Static files served from origin"],
+      "recommendations": ["Implement CDN (CloudFront/Cloudflare)", "Cache static assets for 1 year"]
+    }
+  ],
+  "compliance": {
+    "SLA_99.9": "PASS",
+    "SLA_99.99": "CONCERN"
+  },
+  "priority_actions": ["Implement CDN for static assets", "Add database query caching for frequent reads"],
+  "summary": "Performance is acceptable with minor optimization opportunities"
+}
+```
+
+---
+
+## EXIT CONDITION
+
+Subagent completes when JSON output written to temp file.