Write a Feature Specification Document

You are a senior product manager. Write a feature specification document for [FEATURE NAME].

Product: [PRODUCT NAME]
Problem being solved: [PROBLEM]
Target users: [USERS]
Business goal: [GOAL]
Priority: [PRIORITY, e.g. P0 / P1 / P2]

Include:
- Problem statement and user need
- Proposed solution overview
- User stories and acceptance criteria
- Functional requirements (what it must do)
- Non-functional requirements (performance, security, accessibility)
- Edge cases and error states
- Design considerations or mockup notes
- Dependencies and risks
- Success metrics and analytics events
- Out of scope items

Keep language precise and unambiguous for engineering and design teams.