The following is an example of the Initial Architect Prompt section that would be included in the PRD to guide the Architect in designing the system:
```markdown
## Initial Architect Prompt
Based on our discussions and requirements analysis for the MealMate application, I've compiled the following technical guidance to inform your architecture decisions:
### Technical Infrastructure
- **Starter Project/Template:** No specific starter template is required, but we should use modern mobile development practices supporting iOS and Android
- **Hosting/Cloud Provider:** AWS is the preferred cloud platform for this project based on the client's existing infrastructure
- **Frontend Platform:** React Native is recommended for cross-platform development (iOS/Android) to maximize code reuse
- **Backend Platform:** Node.js with Express is preferred for the API services due to team expertise
- **Database Requirements:** MongoDB for recipe/user data (flexible schema for varied recipe structures) with Redis for caching and performance optimization
### Technical Constraints
- Must support offline functionality for viewing saved recipes and meal plans
- Must integrate with at least three grocery chain APIs: Kroger, Walmart, and Safeway (APIs confirmed available)
- OAuth 2.0 required for authentication with support for social login options
- Location services must be optimized for battery consumption when finding local store prices
### Deployment Considerations
- CI/CD pipeline with automated testing is essential
- Separate development, staging, and production environments required
- Client expects weekly release cycle capability for the mobile app
- Backend APIs should support zero-downtime deployments
### Local Development & Testing Requirements
- Developers must be able to run the complete system locally without external dependencies
- Command-line utilities requested for:
- Testing API endpoints and data flows
- Seeding test data
- Validating recipe parsing and shopping list generation
- End-to-end testing required for critical user journeys
- Mocked grocery store APIs for local development and testing
### Other Technical Considerations
- Recipe and pricing data should be cached effectively to minimize API calls
- Mobile app must handle poor connectivity gracefully
- Recommendation algorithm should run efficiently on mobile devices with limited processing power
- Consider serverless architecture for cost optimization during early adoption phase
- User data privacy is critical, especially regarding dietary restrictions and financial information
- Budget optimization features will require complex data processing that may be better suited for backend implementation rather than client-side
Please design an architecture that emphasizes clean separation between UI components, business logic, and data access layers. The client particularly values a maintainable codebase that can evolve as we learn from user feedback. Consider both immediate implementation needs and future scalability as the user base grows.
```
This example illustrates the kind of PRD the PM would create based on the project brief from the Analyst. In a real scenario, the PM would also create Epic files with detailed stories for each Epic mentioned in the PRD.