Backend Infrastructure: - Complete Express server setup with security middleware (helmet, CORS, rate limiting) - Comprehensive error handling and logging with Winston - Authentication system with JWT tokens and session management - Database models and migrations for Users, Documents, Feedback, and Processing Jobs - API routes structure for authentication and document management - Integration tests for all server components (86 tests passing) Frontend Infrastructure: - React application with TypeScript and Vite - Authentication UI with login form, protected routes, and logout functionality - Authentication context with proper async state management - Component tests with proper async handling (25 tests passing) - Tailwind CSS styling and responsive design Key Features: - User registration, login, and authentication - Protected routes with role-based access control - Comprehensive error handling and user feedback - Database schema with proper relationships - Security middleware and validation - Production-ready build configuration Test Coverage: 111/111 tests passing Tasks Completed: 1-5 (Project setup, Database, Auth system, Frontend UI, Backend infrastructure) Ready for Task 6: File upload backend infrastructure
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# Implementation Plan
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1. Set up project structure and core configuration
- Create directory structure for frontend (React) and backend (Node.js/Express)
- Initialize package.json files with required dependencies
- Set up TypeScript configuration for both frontend and backend
- Configure build tools (Vite for frontend, ts-node for backend)
- Create environment configuration files and validation
- Requirements: All requirements depend on proper project setup
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2. Implement database schema and models
- Set up PostgreSQL database connection and configuration
- Create database migration files for User, Document, DocumentFeedback, DocumentVersion, and ProcessingJob tables
- Implement TypeScript interfaces and database models using an ORM (Prisma or TypeORM)
- Create database seeding scripts for development
- Write unit tests for database models and relationships
- Requirements: 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9
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3. Build authentication system
- Implement JWT token generation and validation utilities
- Create user registration and login API endpoints
- Build password hashing and validation functions
- Implement session management with Redis integration
- Create authentication middleware for protected routes
- Write unit tests for authentication functions and middleware
- Requirements: 1.1, 1.2, 1.3, 1.4, 1.5
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4. Create basic frontend authentication UI
- Build login form component with validation
- Implement authentication context and state management
- Create protected route wrapper component
- Build logout functionality
- Add error handling and user feedback for authentication
- Write component tests for authentication UI
- Requirements: 1.1, 1.2, 1.3, 1.4, 1.5
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5. Create main backend server and API infrastructure
- Create main Express server entry point (index.ts)
- Set up middleware (CORS, helmet, morgan, rate limiting)
- Configure route mounting and error handling
- Create document upload API endpoints structure
- Set up basic API response formatting
- Write integration tests for server setup
- Requirements: 2.1, 2.2, 2.3, 2.4, 2.5, 2.6
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6. Implement file upload backend infrastructure
- Set up multer middleware for file uploads with validation
- Create file storage service (local filesystem or AWS S3)
- Implement PDF file validation (type, size, format)
- Build file cleanup utilities for failed uploads
- Create upload progress tracking system
- Write unit tests for file upload validation and storage
- Requirements: 2.1, 2.2, 2.3, 2.4, 2.5, 2.6
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7. Build file upload frontend interface
- Create drag-and-drop file upload component
- Implement upload progress display with real-time updates
- Add file validation feedback and error messages
- Build upload success confirmation and next steps UI
- Integrate with backend upload API endpoints
- Write component tests for upload functionality
- Requirements: 2.1, 2.2, 2.3, 2.4, 2.5, 2.6
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8. Implement PDF text extraction service
- Install and configure PDF parsing library (pdf-parse)
- Create text extraction service with error handling
- Implement text chunking for large documents
- Add text quality validation and cleanup
- Create extraction progress tracking
- Write unit tests for text extraction with sample PDFs
- Requirements: 3.1, 3.8
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9. Set up job queue system for background processing
- Configure Bull queue with Redis backend
- Create job types for text extraction, LLM processing, and PDF generation
- Implement job progress tracking and status updates
- Build job retry logic with exponential backoff
- Create job monitoring and cleanup utilities
- Write unit tests for job queue functionality
- Requirements: 3.5, 3.6, 3.8
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10. Implement LLM integration service
- Set up OpenAI or Anthropic API client with configuration
- Create prompt templates for Part 1 (CIM Data Extraction) and Part 2 (Investment Analysis)
- Implement token counting and document chunking logic
- Build LLM response validation and retry mechanisms
- Create cost tracking and rate limiting
- Write unit tests with mocked LLM responses
- Requirements: 3.2, 3.3, 3.4, 3.6, 3.7, 3.8, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7
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11. Build document processing workflow orchestration
- Create main processing service that coordinates all steps
- Implement workflow: upload → text extraction → LLM processing → storage
- Add error handling and recovery for each processing step
- Build processing status updates and user notifications
- Create processing history and audit logging
- Write integration tests for complete processing workflow
- Requirements: 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8
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12. Implement markdown to PDF conversion service
- Set up Puppeteer for PDF generation from markdown
- Create PDF styling and formatting templates
- Implement PDF generation with proper error handling
- Add PDF file naming with timestamps
- Create PDF validation and quality checks
- Write unit tests for PDF generation with sample markdown
- Requirements: 5.3, 5.4, 5.5, 5.6
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13. Build document download API endpoints
- Create API endpoints for markdown and PDF downloads
- Implement secure file serving with authentication checks
- Add download logging and audit trails
- Build file streaming for large PDF downloads
- Create download error handling and user feedback
- Write unit tests for download endpoints
- Requirements: 5.1, 5.2, 5.3, 5.4, 5.5, 5.6
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14. Create user dashboard frontend
- Build document list component with status indicators
- Implement real-time processing status updates using WebSockets or polling
- Create document detail view with metadata display
- Add download buttons for completed documents
- Build error display and retry functionality
- Write component tests for dashboard functionality
- Requirements: 6.1, 6.2, 6.3, 6.4, 6.5, 6.6
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15. Implement feedback and regeneration system
- Create feedback submission API endpoints
- Build feedback storage and retrieval functionality
- Implement document regeneration with user instructions
- Create version history tracking and management
- Add regeneration progress tracking and notifications
- Write unit tests for feedback and regeneration features
- Requirements: 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7
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16. Build feedback and regeneration UI
- Create feedback form component with text input
- Implement regeneration request interface
- Build version history display and navigation
- Add regeneration progress indicators
- Create comparison view for different versions
- Write component tests for feedback UI
- Requirements: 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7
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17. Implement admin dashboard backend
- Create admin-only API endpoints for system overview
- Build user management functionality (view, disable users)
- Implement system-wide document access and management
- Create admin audit logging and activity tracking
- Add storage metrics and system health monitoring
- Write unit tests for admin functionality
- Requirements: 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9
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18. Build admin dashboard frontend
- Create admin panel with user and document overview
- Implement document search and filtering functionality
- Build user management interface
- Add system metrics and storage usage displays
- Create admin action confirmation dialogs
- Write component tests for admin UI
- Requirements: 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9
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19. Implement comprehensive error handling and logging
- Set up Winston logging with different log levels
- Create centralized error handling middleware
- Implement error categorization and user-friendly messages
- Add error recovery and retry mechanisms
- Create error monitoring and alerting system
- Write tests for error scenarios and recovery
- Requirements: 9.1, 9.2, 9.3, 9.4, 9.5, 9.6
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20. Add security hardening and validation
- Implement input sanitization and validation middleware
- Add rate limiting to all API endpoints
- Create file security scanning integration
- Implement CORS and security headers
- Add audit logging for sensitive operations
- Write security tests and penetration testing scenarios
- Requirements: 9.4, 9.5, 9.6
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21. Create comprehensive test suite
- Write integration tests for complete user workflows
- Create end-to-end tests using Playwright
- Implement performance tests for file processing
- Add load testing for concurrent uploads
- Create test data fixtures and mock services
- Set up continuous integration test pipeline
- Requirements: All requirements need comprehensive testing
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22. Build deployment configuration and documentation
- Create Docker containers for frontend and backend
- Set up database migration and seeding scripts
- Create environment-specific configuration files
- Build deployment scripts and CI/CD pipeline
- Write API documentation and user guides
- Create monitoring and health check endpoints
- Requirements: System deployment supports all requirements