Quick PRD
Turn the user's product idea into a concise PRD.
Use this structure:
# [Product name] PRD
## Background
[Why this product or feature is needed]
## Goal
- [Goal 1]
- [Goal 2]
## Target users
[Primary users]
## Core features
1. [Feature and brief description]
2. [Feature and brief description]
3. [Feature and brief description]
## User flow
1. [Step]
2. [Step]
3. [Step]
## Acceptance criteria
- [Testable criterion]
- [Testable criterion]
## Out of scope
- [Excluded item]
Keep the result practical and under 600 Chinese characters unless the user requests more detail.
