[SESSION_127] SummaryAgent: Implement Trend Analysis (Phase 23)

Feature: Trend Analysis and Insights

Component: SummaryAgent (/agents/summary_agent/)
Severity: 🔴 CRITICAL BLOCKER
Session: SESSION 127 (Definition of Done)
Current Status: Stub returns generic insights
Target Phase: Phase 23

Context

SummaryAgent's value depends on detecting meaningful trends in metrics over time. Currently, trend analysis returns hardcoded generic insights regardless of actual data.

Requirements

• Analyze metrics trends (up, down, stable)
• Detect anomalies and inflection points
• Calculate moving averages and volatility
• Identify seasonal patterns
• Generate actionable insights based on trends

Impact

Without this feature:

• Reports lack intelligence and actionability
• Users cannot identify emerging issues
• Strategic decision-making hampered

Effort Estimate

• Statistical analysis implementation: 8-10 hours
• Insight generation: 4-6 hours
• Testing with real data: 3-4 hours
• Total: 12-15 hours

Technical Approach

• Time-series decomposition (trend, seasonality, residuals)
• Moving average calculations (7-day, 30-day)
• Change point detection
• Anomaly scoring
• Natural language insight generation

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Generated by SESSION 127 FASE 2.7