echo.

Privacy-first anonymous P2P chat with ephemeral messaging, AI assistance, and cross-device notifications

A monochromatic dark mode chat platform optimized for Cloudflare with D1 Database, Workers AI, and polling-based real-time updates. No WebSocket infrastructure required.

✨ Features

🔒 Privacy & Anonymity

• No Sign-Up: Join instantly with any username
• Code-Based Rooms: Share 6-character codes to invite
• Auto-Delete: All messages expire after 1 hour
• Anonymous Sessions: No persistent user tracking
• Local-First: Preferences stored in browser only

💬 Real-Time Communication

• Polling Updates: 2-second interval, no WebSocket needed
• Typing Indicators: See when others are composing
• Message Editing: Edit with "edited" badge
• Direct Messages: Hover over usernames for ephemeral DM overlay
• Online Presence: See active users in real-time

🎨 Rich Media

• GIF Integration: Giphy API with search and trending
• Image Sharing: Share via URL, client-side rendering
• IsraelGPT AI: Mention @israelgpt, @bigyahu, @israel, or @netanyahu
• Timestamps: Context-aware time display

💾 Message Clipping

• Save Messages: Clip others' messages to personal library
• Visual Indicators: See clip counts on messages
• Persistent Storage: Clips survive 1-hour expiry
• Easy Management: View and organize in sidebar

🔔 Notifications

• Local Notification Server: Node.js process for cross-device delivery
• Works When Tab Closed: Get notified even when not active
• Customizable: Control what triggers notifications
• ChromeOS Compatible: Full native support

🎨 Design

• Monochromatic Theme: Pure grayscale palette
• Dark Mode Default: Easy on eyes, #0a0a0a to #ffffff
• Ghost UI: Transparent elements with subtle borders
• Minimal & Elegant: Focus on content, not chrome

🚀 Quick Start

Prerequisites

• Node.js 18+
• pnpm (or npm)
• Cloudflare account
• Wrangler CLI: npm install -g wrangler

1. Install Dependencies

pnpm install

2. Set Up Cloudflare

# Login to Cloudflare
wrangler login

# Create D1 Database
wrangler d1 create echo-db
# Copy the database ID and paste it into wrangler.toml

# Run migrations
pnpm db:migrate

3. Start Development

# Start Next.js dev server
pnpm dev

# In another terminal, start notification server (optional)
pnpm notify

Visit http://localhost:3000 🎉

4. Deploy to Cloudflare

# Build and deploy
pnpm cf:deploy

# Or push to GitHub and connect via Cloudflare Pages dashboard

See CLOUDFLARE_SETUP_GUIDE.md for detailed deployment instructions.

🏗️ Architecture

┌─────────────────────────────────────────────────────┐
│              Next.js 16 Application                 │
│         (React 19 + Server Components)              │
└───────────────────┬─────────────────────────────────┘
                    │
                    ▼
┌─────────────────────────────────────────────────────┐
│           Cloudflare Workers (Edge)                 │
│              API Routes (Edge Runtime)              │
└──┬─────────┬──────────┬──────────┬──────────────────┘
   │         │          │          │
   ▼         ▼          ▼          ▼
┌────────┐ ┌──────┐ ┌────────┐ ┌──────────────┐
│   D1   │ │Workers│ │ Giphy  │ │Local Notify  │
│Database│ │  AI   │ │  API   │ │   Server     │
│(SQLite)│ │(Llama)│ │(Proxy) │ │  (Node.js)   │
└────────┘ └──────┘ └────────┘ └──────────────┘

Why Polling Instead of WebSockets?

• ✅ Cloudflare-Friendly: No persistent connection infrastructure
• ✅ Simpler Deployment: Just deploy to Cloudflare Pages
• ✅ Universal Compatibility: Works everywhere, no connection issues
• ✅ Battery-Efficient: Less resource usage on mobile
• ✅ Automatic Reconnection: No connection management needed
• ✅ Still Real-Time: 2-second polling feels instant

📚 Documentation

Document	Description
FEATURES.md	Complete feature documentation with code examples
CLOUDFLARE_SETUP_GUIDE.md	Step-by-step Cloudflare deployment guide
ARCHITECTURE.md	System design and technical architecture
QUICK_START.md	Getting started guide
USAGE_GUIDE.md	User guide for end users
IMPLEMENTATION_SUMMARY.md	Implementation details and decisions

🎯 Key Concepts

Ephemeral Messaging

All messages automatically expire after 1 hour:

1. Message created with expires_at timestamp
2. Visible and editable for 1 hour
3. Cron job runs every 10 minutes to cleanup
4. After 1 hour: permanently deleted
5. Exception: Clipped messages persist in clips table

IsraelGPT AI Assistant

Powered by Cloudflare Workers AI (Llama 2 7B):

User: @israelgpt explain quantum computing
IsraelGPT: Quantum computing uses quantum bits (qubits) that can exist in 
           multiple states simultaneously, enabling parallel processing...

Trigger with: @israelgpt, @bigyahu, @israel, or @netanyahu

Local Notification Server

Lightweight Node.js server for cross-device notifications:

# Start server (port 3001)
pnpm notify

# Server polls API for new messages
# Shows notifications even when tab is closed
# No cloud service needed

Message Lifecycle

Create → Active (1 hour) → Expired → Auto-Deleted
    ↓
   Clip → Persists in clips table (survives expiry)

🛠️ Tech Stack

Frontend

• Next.js 16: React framework with App Router
• React 19: Latest React with Server Components
• Tailwind CSS: Utility-first styling
• shadcn/ui: Radix UI component primitives
• TypeScript: Type safety

Backend

• Cloudflare Workers: Edge API routes
• D1 Database: SQLite at the edge
• Workers AI: Llama 2 7B model
• Cron Triggers: Automatic cleanup

APIs

• Giphy: GIF search and trending (proxied)
• Polling: 2-second interval updates
• Local Server: Node.js notification server

📦 Project Structure

echo/
├── app/
│   ├── api/
│   │   ├── rooms/route.ts          # Create/get rooms
│   │   ├── messages/route.ts       # CRUD messages
│   │   ├── poll/route.ts           # Polling endpoint
│   │   ├── typing/route.ts         # Typing indicators
│   │   ├── join/route.ts           # Join room
│   │   ├── giphy/route.ts          # Giphy proxy
│   │   └── clips/route.ts          # Message clipping
│   ├── room/[code]/page.tsx        # Chat room page
│   ├── page.tsx                    # Home (join/create)
│   ├── layout.tsx                  # Root layout
│   └── globals.css                 # Theme & styles
├── components/
│   ├── chat-interface.tsx          # Main chat UI
│   ├── message-bubble.tsx          # Message display
│   ├── chat-input.tsx              # Input with media
│   ├── typing-indicator.tsx        # Typing animation
│   ├── user-hover-card.tsx         # Hover for DM
│   ├── direct-message-overlay.tsx  # DM interface
│   ├── clips-library.tsx           # Saved messages
│   ├── gif-picker.tsx              # GIF selection
│   └── ui/                         # shadcn components
├── hooks/
│   ├── use-polling.ts              # Polling hook
│   └── use-mobile.tsx              # Responsive hook
├── lib/
│   ├── types.ts                    # TypeScript types
│   ├── chat-utils.ts               # Helper functions
│   ├── d1-client.ts                # D1 operations
│   └── notification-service.ts     # Notifications
├── notification-server/
│   └── server.js                   # Local notify server
├── scripts/
│   └── setup-d1-database.sql       # Database schema
├── wrangler.toml                   # Cloudflare config
└── next.config.ts                  # Next.js config

🎨 Customization

Adjust Polling Interval

In hooks/use-polling.ts:

usePolling({ 
  roomCode, 
  userId, 
  interval: 2000  // Change to 1000 (faster) or 5000 (slower)
})

Change Message Expiry

In wrangler.toml:

[vars]
MESSAGE_EXPIRY_HOURS = "2"  # Change from 1 to any number

Customize Theme

In app/globals.css:

:root {
  --background: 0 0% 4%;     /* Darker: 2%, Lighter: 8% */
  --foreground: 0 0% 95%;    /* Text brightness */
  --border: 0 0% 18%;        /* Border visibility */
}

🧪 Testing

Create a Room

1. Visit home page
2. Click "Create Room"
3. Optionally set custom code
4. Enter username
5. Share room code

Test Features

• ✅ Send text messages
• ✅ Share an image URL
• ✅ Search and send GIFs
• ✅ Mention @israelgpt for AI response
• ✅ Edit your messages
• ✅ Clip someone's message
• ✅ Hover over username for DM
• ✅ See typing indicators
• ✅ Watch messages expire after 1 hour

🚀 Performance

Metrics

• Time to Interactive: < 2s
• First Contentful Paint: < 1s
• Message Latency: ~2s (polling interval)
• Global Edge: < 50ms API responses
• Bundle Size: < 300KB gzipped

Optimizations

• Edge-first architecture
• D1 database at edge locations
• Indexed SQL queries
• Code splitting
• Image lazy loading
• Debounced typing indicators

🌍 Browser Support

• ✅ Chrome/Edge 90+
• ✅ Firefox 88+
• ✅ Safari 14+
• ✅ Mobile browsers
• ✅ ChromeOS (full notification support)

🔐 Security & Privacy

Privacy Features

• Anonymous sessions (no accounts)
• Auto-delete after 1 hour
• No tracking or analytics
• Session-based user IDs only
• Local storage for preferences

Security Measures

• Parameterized SQL queries (prevent injection)
• Input sanitization (XSS protection)
• HTTPS enforced
• CORS configuration
• Rate limiting ready (optional)

📋 Scripts

# Development
pnpm dev              # Start Next.js dev server
pnpm notify           # Start notification server

# Database
pnpm db:migrate       # Run D1 migrations
pnpm db:shell         # Open D1 shell

# Deployment
pnpm build            # Build for production
pnpm cf:deploy        # Deploy to Cloudflare Pages
pnpm cf:dev           # Test with Cloudflare locally

# Utilities
pnpm lint             # Run ESLint
pnpm type-check       # TypeScript validation
pnpm clean            # Clean build artifacts

🗺️ Roadmap

Current Release (v1.0)

• Anonymous code-based rooms
• Ephemeral messaging (1-hour expiry)
• Message clipping
• Polling-based real-time updates
• GIF integration (Giphy)
• Image sharing
• IsraelGPT AI assistant
• Typing indicators
• Message editing
• Direct message overlays
• Local notification server
• Monochromatic dark theme

Future Features

• End-to-end encryption
• Voice messages
• File sharing
• Message reactions
• Threading/replies
• Room passwords
• Custom expiry times
• Native mobile apps
• Multiple AI models
• Advanced analytics (anonymous)

🤝 Contributing

Contributions welcome! Please:

1. Fork the repository
2. Create feature branch: git checkout -b feature/amazing
3. Commit changes: git commit -m 'Add amazing feature'
4. Push to branch: git push origin feature/amazing
5. Open Pull Request

See CONTRIBUTING.md for guidelines.

📄 License

MIT License - see LICENSE file.

🙏 Credits

Built with:

• Next.js - React framework
• Tailwind CSS - Styling
• shadcn/ui - UI components
• Cloudflare - Edge platform
• Giphy - GIF integration

💬 Support

• Documentation: See /docs folder
• Issues: GitHub Issues
• Discussions: GitHub Discussions

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echo. - Ephemeral messaging for the privacy-conscious web.

Made with ♥ for anonymous, temporary conversations.