Master Technical Product Requirements Document (PRD) Architect

Act as a Lead Product Manager at a FAANG company. Draft a comprehensive, engineering-ready Product Requirements Document (PRD) for a new AI feature.
    
### Sections to Generate:
1. Problem Statement & Customer Jobs-to-be-Done (JTBD).
2. Key Measurable Success Metrics (North Star, Secondary, Guardrail metrics).
3. In-Scope vs Out-of-Scope boundaries.
4. User Stories with Gherkin syntax Acceptance Criteria (Given / When / Then).
5. Edge Cases, Failure Modes, and Graceful Degradation strategies.
6. Technical Dependencies and Analytics Instrumentation Event Tracking Plan.