Requirements

Requirements Document

Introduction

The Universal Starter is a comprehensive foundation for startups to rapidly build and deploy full-stack applications. It provides a modern tech stack with Expo for cross-platform frontend development, Elysia with Bun for high-performance backend APIs, BullMQ with Redis for background job processing, and PostgreSQL for reliable data storage. The starter includes essential features like authentication, payments, and deployment infrastructure, allowing startups to focus on their core business logic rather than foundational setup.

Requirements

Requirement 1

User Story: As a startup founder, I want a complete authentication system with multiple providers, so that users can easily sign up and access my application securely across web and mobile platforms.

Acceptance Criteria

1. WHEN a user visits the application THEN the system SHALL provide sign-up and sign-in options
2. WHEN a user signs up THEN the system SHALL support email/password and OAuth providers (Google, GitHub, Apple)
3. WHEN a user signs in THEN the system SHALL create secure sessions with proper token management
4. WHEN a user accesses protected routes THEN the system SHALL verify authentication status
5. WHEN a user signs out THEN the system SHALL invalidate all active sessions
6. IF authentication fails THEN the system SHALL provide clear error messages and recovery options

Requirement 2

User Story: As a startup founder, I want a robust payments and billing system, so that I can monetize my application through subscriptions and handle customer billing automatically.

Acceptance Criteria

1. WHEN setting up monetization THEN the system SHALL provide subscription plan management with multiple tiers
2. WHEN users subscribe THEN the system SHALL process payments securely through Stripe integration
3. WHEN billing cycles occur THEN the system SHALL automatically charge customers and send invoices
4. WHEN payments fail THEN the system SHALL implement retry logic and notify customers
5. WHEN users need billing support THEN the system SHALL provide invoice history and payment method management
6. IF compliance is required THEN the system SHALL handle tax calculations and regulatory requirements

Requirement 3

User Story: As a startup founder, I want reliable background job processing, so that I can handle time-intensive tasks without blocking user interactions and ensure system scalability.

Acceptance Criteria

1. WHEN intensive operations are needed THEN the system SHALL queue jobs for background processing
2. WHEN jobs are processed THEN the system SHALL use Redis and BullMQ for reliable job management
3. WHEN jobs fail THEN the system SHALL implement retry mechanisms with exponential backoff
4. WHEN monitoring jobs THEN the system SHALL provide job status tracking and failure notifications
5. WHEN scaling is needed THEN the system SHALL support multiple worker instances
6. IF job priorities differ THEN the system SHALL support job prioritization and scheduling

Requirement 4

User Story: As a startup founder, I want streamlined deployment and infrastructure management, so that I can focus on product development while ensuring reliable production operations.

Acceptance Criteria

1. WHEN deploying applications THEN the system SHALL provide automated deployment pipelines
2. WHEN infrastructure is needed THEN the system SHALL include Docker configurations and cloud deployment scripts
3. WHEN monitoring production THEN the system SHALL provide logging, metrics, and error tracking
4. WHEN scaling is required THEN the system SHALL support horizontal scaling and load balancing
5. WHEN updates are deployed THEN the system SHALL support zero-downtime deployments
6. IF issues occur THEN the system SHALL provide rollback capabilities and incident response tools

Requirement 5

User Story: As a developer using this starter, I want comprehensive documentation and development tools, so that I can quickly understand the codebase and extend it for my specific needs.

Acceptance Criteria

1. WHEN starting development THEN the system SHALL provide clear setup instructions and prerequisites
2. WHEN exploring the codebase THEN the system SHALL include comprehensive API documentation
3. WHEN adding features THEN the system SHALL provide code examples and integration patterns
4. WHEN debugging issues THEN the system SHALL include development tools and debugging guides
5. WHEN customizing the starter THEN the system SHALL provide extension points and configuration options
6. IF help is needed THEN the system SHALL include troubleshooting guides and community resources

Requirement 6

User Story: As a startup founder, I want essential business features built-in, so that I can launch quickly with professional-grade functionality that users expect.

Acceptance Criteria

1. WHEN building user interfaces THEN the system SHALL provide responsive design components for web and mobile
2. WHEN managing data THEN the system SHALL include database models and API patterns for common use cases
3. WHEN communicating with users THEN the system SHALL provide email integration and notification systems
4. WHEN ensuring security THEN the system SHALL implement security best practices and compliance measures
5. WHEN analyzing usage THEN the system SHALL provide basic analytics and user activity tracking
6. IF customization is needed THEN the system SHALL support theming and branding customization

Requirement 7

User Story: As a startup founder, I want multi-tenancy and team collaboration features, so that I can serve multiple customers or enable team-based workflows within my application.

Acceptance Criteria

1. WHEN serving multiple customers THEN the system SHALL support organization/workspace isolation
2. WHEN managing teams THEN the system SHALL provide role-based access control and permissions
3. WHEN collaborating THEN the system SHALL enable team member invitations and management
4. WHEN organizing data THEN the system SHALL ensure proper data isolation between organizations
5. WHEN billing teams THEN the system SHALL support organization-level billing and subscription management
6. IF compliance is required THEN the system SHALL maintain audit trails for multi-tenant operations

Requirement 8

User Story: As a startup founder, I want file management and content features, so that users can upload, store, and manage files while I can create marketing content and documentation.

Acceptance Criteria

1. WHEN users upload files THEN the system SHALL provide secure file storage with S3 integration
2. WHEN displaying media THEN the system SHALL include image optimization and CDN delivery
3. WHEN managing content THEN the system SHALL provide a basic CMS for marketing pages and documentation
4. WHEN organizing files THEN the system SHALL support file categorization and access controls
5. WHEN ensuring performance THEN the system SHALL implement file compression and caching
6. IF storage limits apply THEN the system SHALL provide usage tracking and quota management