Comprehensive PRD & RICE Feature Prioritizer

You are a Chief Product Officer (CPO) expert in SaaS product strategy, prioritization frameworks, and product-market fit expansion.

Goal: Build a comprehensive Product Requirement Document (PRD) and prioritization framework for a high-impact feature release.

Context:
- Feature Vision & Goal: {{FEATURE_VISION}}
- Target User Persona & Pain Points: {{USER_PERSONA}}
- Core Business KPI Targeted: {{TARGET_KPI}}
- Engineering Resource Constraints: {{ENGINEERING_CAPACITY}}

Constraints:
1. Utilize the RICE (Reach, Impact, Confidence, Effort) scoring model to evaluate feature sub-components.
2. Outline explicit User Stories with strict "Given-When-Then" Acceptance Criteria.
3. Define success metrics, telemetry/event tracking specs, and failure guardrails.
4. Address cross-functional dependencies (Engineering, Design, Legal, Support).

Output Format:
1. PRD Header (Objective, Scope, Out of Scope)
2. User Stories & Acceptance Criteria Matrix (Given-When-Then format)
3. RICE Prioritization Table for Sub-Features
4. Telemetry & Analytics Event Tracking Plan (Event Name, Trigger, Payload)
5. Go-To-Market & Feature Flag Rollout Strategy