🎯 Frontend
Framework
- Streamlit 1.28+
- Rapid prototyping web interface
- Built-in components for forms, buttons, file uploads
- Session state management for user data persistence
Styling
- Custom CSS (inline)
- Google Fonts (Inter)
- Gradient designs and modern UI components
- Responsive layout with column-based design
⚙️ Backend
Core Language
- Python 3.8+
- Primary application logic
- Data processing and manipulation
LLM Integration
- Groq API with Llama 3.3 70B Versatile
- Newsletter draft generation
- Content curation and summarization
- Style matching based on training samples
Data Processing
- pandas - Data manipulation and CSV handling
- Collections (Counter) - Trend detection and keyword frequency analysis
- datetime - Timestamp management and scheduling
- re (regex) - Text parsing and pattern matching
- json - Data serialization
Web Scraping
- feedparser - YouTube RSS feed parsing
- requests - HTTP requests for content fetching
- ssl/certifi - Secure SSL context for API calls
📧 Email Infrastructure
- smtplib - SMTP email protocol implementation
- email.mime - Email message formatting (text, multipart)
- Gmail SMTP Server - Email delivery service
- Server: smtp.gmail.com:587
- TLS encryption
- App Password authentication
📌 SMTP Implementation Details
Direct SMTP for MVP: This implementation uses Gmail's SMTP server directly without third-party email services (SendGrid, Mailgun, AWS SES).
✅ Advantages
- Free (no service costs)
- Simple setup
- Perfect for MVP testing
- No API integrations needed
❌ Limitations
- Gmail rate limits (~500/day)
- Lower deliverability vs dedicated services
- No email analytics (opens/clicks)
- Account suspension risk for mass sending
📊 Content Sources
- YouTube RSS Feeds - Video content aggregation
- Channel-based feed parsing
- Video metadata extraction (title, summary, links)
💾 Data Storage
- Streamlit Session State - In-memory data persistence
- User sources
- Style samples
- Subscriber lists
- Draft history
- Analytics data
🔒 Security
- SSL/TLS - Encrypted connections
- Gmail App Passwords - Secure authentication (no plain text passwords)
- certifi - Certificate validation
🛠️ Development Tools
- random - Seed generation and variation modes
- typing - Type hints for code clarity
🚀 Deployment
Streamlit Cloud (Recommended for MVP)
- Free tier available
- Easy deployment from GitHub
- Built-in hosting and SSL
- Environment variable management
- Zero DevOps overhead
🌐 External APIs & Services
- Groq API - LLM inference (requires API key)
- Gmail SMTP - Email delivery (requires app password)
- YouTube RSS - Content feeds (no API key required)
💻 Development Environment
Package Management
pip install streamlit pandas groq feedparser certifi requests
Environment Variables
GROQ_API_KEY=your_api_key_here
GMAIL_SENDER=your_email@gmail.com
GMAIL_APP_PASSWORD=your_16_char_password
🏗️ Architecture Pattern
- Monolithic Application - Single Streamlit app
- Session-based State - No database required for MVP
- Synchronous Processing - Real-time content generation
- Direct SMTP - No email service abstraction
📦 Key Dependencies Summary
| Category |
Package |
Version |
Purpose |
| Web Framework |
streamlit |
1.28+ |
UI/UX |
| LLM |
groq |
Latest |
Content generation |
| Data |
pandas |
1.5+ |
Data manipulation |
| Scraping |
feedparser |
6.0+ |
RSS parsing |
| Email |
smtplib |
Built-in |
Email sending |
| Security |
certifi |
Latest |
SSL certificates |
| HTTP |
requests |
2.31+ |
Web requests |
📊 Project Metrics
Tech Stack Complexity:
Low-Medium
Setup Time:
< 1 hour
Deployment Complexity:
Low
Scalability:
MVP-ready