youtube-summarizer/docs/prd/index.md

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YouTube Summarizer - Epic Index

Epic Overview

This index provides navigation and status tracking for all epics in the YouTube Summarizer project. Each epic represents a major milestone in the product development journey from basic functionality to advanced features.

Project Vision

Create a self-hosted, hobby-scale YouTube Summarizer that transforms long-form video content into concise, actionable summaries using AI technology. Prioritize background processing, cost efficiency, and professional code quality while maintaining simplicity for hobby deployment.

Epic Status Dashboard

Epic Status Progress Stories Complete Next Action
Epic 1 🟢 Ready for Development 100% Stories Created (4/4) Story 1.1 Complete, Stories 1.2-1.4 📋 Ready Begin Story 1.2 Implementation
Epic 2 ⏸️ Blocked 0% (0/5) None Wait for Epic 1
Epic 3 ⏸️ Blocked 0% (0/5) None Wait for Epic 2

Overall Project Progress: 8% (1/14 stories completed)


Epic 1: Foundation & Core YouTube Integration

🎯 Goal: Establish foundational infrastructure and core YouTube integration

📁 Epic File: epic-1-foundation-core-youtube-integration.md

🔗 Dependencies: None (foundational epic)

📊 Status: 🟢 Ready for Development - All stories created and ready for implementation

Stories in Epic 1

Story Title Status File Dependencies
1.1 Project Setup and Infrastructure COMPLETED 1.1.project-setup-infrastructure.md None
1.2 YouTube URL Validation and Parsing 📋 CREATED 1.2.youtube-url-validation-parsing.md Story 1.1
1.3 Transcript Extraction Service 📋 CREATED 1.3.transcript-extraction-service.md Story 1.2
1.4 Basic Web Interface 📋 CREATED 1.4.basic-web-interface.md Story 1.3

Key Deliverables

  • Complete development environment with Docker
  • YouTube URL processing and validation
  • Transcript extraction with fallbacks
  • Basic responsive web interface

Architecture Components

  • Backend: FastAPI + Python 3.11+ with async support
  • Frontend: React 18 + TypeScript + shadcn/ui
  • Database: SQLite for development
  • Deployment: Docker Compose self-hosted

Epic 2: AI Summarization Engine

🎯 Goal: Implement AI-powered summarization with multi-model support and caching

📁 Epic File: epic-2-ai-summarization-engine.md

🔗 Dependencies: Epic 1 (Foundation & Core YouTube Integration)

📊 Status: Blocked - Waiting for Epic 1 completion

Stories in Epic 2

Story Title Status File Dependencies
2.1 Single AI Model Integration ⏸️ Blocked - Story 1.4
2.2 Summary Generation Pipeline ⏸️ Blocked - Story 2.1
2.3 Caching System Implementation ⏸️ Blocked - Story 2.2
2.4 Multi-Model Support ⏸️ Blocked - Story 2.3
2.5 Export Functionality ⏸️ Blocked - Story 2.4

Key Deliverables

  • AI integration with OpenAI GPT-4o-mini
  • Multi-model support (OpenAI, Anthropic, DeepSeek)
  • Intelligent caching system (24-hour TTL)
  • Export functionality (Markdown, PDF, plain text)
  • Cost optimization (~$0.001-0.005 per summary)

Architecture Components

  • AI Service: Provider abstraction with fallback
  • Cache Service: Memory + database caching
  • Export Service: Multiple format generation
  • Cost Tracking: Usage monitoring and optimization

Epic 3: Enhanced User Experience

🎯 Goal: Transform into comprehensive platform with authentication, batch processing, and API

📁 Epic File: epic-3-enhanced-user-experience.md

🔗 Dependencies: Epic 2 (AI Summarization Engine)

📊 Status: Blocked - Waiting for Epic 2 completion

Stories in Epic 3

Story Title Status File Dependencies
3.1 User Authentication System ⏸️ Blocked - Story 2.5
3.2 Summary History Management ⏸️ Blocked - Story 3.1
3.3 Batch Processing ⏸️ Blocked - Story 3.2
3.4 Real-time Updates ⏸️ Blocked - Story 3.3
3.5 API Endpoints ⏸️ Blocked - Story 3.4

Key Deliverables

  • User registration and authentication (JWT-based)
  • Persistent summary history with search
  • Batch processing for multiple videos
  • Real-time WebSocket progress updates
  • Public API with SDK support

Architecture Components

  • Auth Service: JWT authentication with refresh tokens
  • User Management: Profiles and preferences
  • Batch Processing: Background job queue system
  • WebSocket Service: Real-time progress updates
  • API Gateway: Rate limiting and key management

Development Workflow

Current Priority: Epic 1 Completion

Next Steps:

  1. Implement Story 1.2 (YouTube URL Validation and Parsing) ⬅️ START HERE
  2. Implement Story 1.3 (Transcript Extraction Service)
  3. Implement Story 1.4 (Basic Web Interface)
  4. Epic 1 Validation (Complete integration testing)

Story Creation Process

  1. Select Next Story: Use epic dependency chain
  2. Create Story File: Follow BMad Method template
  3. Add Technical Context: Reference architecture document
  4. Validate Story: Run story-draft-checklist
  5. Update Epic Status: Track completion progress

Commands for Story Management

# Create next story
/BMad:agents:sm
*draft

# Validate story quality
/BMad:agents:sm
*story-checklist

# Execute story implementation
/BMad:agents:dev
# (implement story based on detailed specifications)

Architecture Integration

Key Architecture Documents

Technology Stack Overview

Layer Epic 1 Epic 2 Epic 3
Frontend React + TypeScript AI Integration UI Auth + Advanced UI
Backend FastAPI + SQLite AI Services User Management
External YouTube APIs AI APIs Email + Webhooks
Infrastructure Docker Compose Caching Layer Background Jobs

Quality Assurance

Definition of Done (Epic Level)

  • All stories completed and validated
  • Integration testing passing
  • Documentation updated
  • Performance targets met
  • Security requirements satisfied

Testing Strategy by Epic

  • Epic 1: Infrastructure and integration testing
  • Epic 2: AI service testing and cost validation
  • Epic 3: User flows and API testing

Project Metrics

Cost Optimization Targets

  • Development: Self-hosted Docker deployment
  • AI Processing: ~$0.10/month for hobby usage
  • Storage: Local SQLite (upgradeable to PostgreSQL)

Performance Targets

  • Epic 1: Development setup < 5 minutes
  • Epic 2: Summary generation < 30 seconds
  • Epic 3: Real-time updates < 1 second latency

Quality Standards

  • Code Coverage: > 80% backend, > 70% frontend
  • Type Safety: 100% TypeScript coverage
  • Documentation: Complete setup and API documentation

Epic Index Last Updated: 2025-01-25
Project Owner: Bob (Scrum Master)
Architecture Reference: Winston (Architect)
Development Status: Story 1.1 completed, ready for Story 1.2 creation