EchoNote 🎙️

AI-powered meeting intelligence — with a stunning dark/light UI.
Upload meetings → get transcripts, summaries, action items, and autonomous reminders.

🔗 Live Demo: echonote-three.vercel.app
💻 GitHub: github.com/Devnil434/echonote

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🚀 Overview

EchoNote is a production-ready AI SaaS platform that transforms raw meeting recordings into structured, actionable intelligence.

Upload an audio recording or paste a transcript, and EchoNote automatically:

• 🎧 Transcribes meetings using Groq Whisper (200× realtime speed)
• 🤖 Generates AI summaries using Gemini Flash
• ✅ Extracts action items, owners, and deadlines
• 🔍 Stores searchable meeting history in Supabase PostgreSQL
• 📧 Sends autonomous reminder emails via Gmail SMTP + Nodemailer
• 🌙 Ships with a premium dark/light mode toggle powered by next-themes

Built with a modern full-stack AI architecture using Next.js 16, TypeScript, Supabase, and Vercel.

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✨ Features

🎧 Audio Upload & Processing

• Upload MP3 / WAV / M4A recordings (up to 25 MB)
• Secure cloud storage with Supabase Storage
• Real-time processing pipeline

🤖 AI Meeting Intelligence

• Ultra-fast transcription using Groq Whisper
• AI-generated executive summaries
• Key decision and topic extraction
• Automatic action-item detection with deadlines and owner attribution

📌 Task & Reminder System

AI extracts per action item:

• Task owner, deadline, priority

Autonomous reminder agent:

• Daily cron scans upcoming deadlines
• Email reminders before anything is missed
• Overdue notifications via custom Gmail SMTP

📊 Dashboard Experience

• Searchable meeting history
• Meeting detail pages with transcript viewer
• Status tracking (pending → transcribed → summarized)
• Responsive, accessible SaaS UI

🔒 Authentication & Security

• Supabase Auth with email confirmation (PKCE flow)
• Dedicated /auth/callback route for secure token exchange
• Row Level Security (RLS) on all tables
• Protected dashboard routes via Next.js middleware

🌙 Modernized Dark / Light Theme

• Dynamic dark/light/system mode via next-themes
• Premium midnight-indigo oklch color palette in dark mode
• Glowing cyber-purple primary accent
• Silky smooth 300ms CSS transitions between themes
• Theme toggle button with animated ☀️↔🌙 swap

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🧠 AI Workflow

Audio Upload / Transcript Paste
           ↓
  Groq Whisper Transcription
           ↓
  Gemini Flash Summarization
           ↓
  Structured JSON Extraction
           ↓
  Action Items + Deadlines stored in Supabase
           ↓
  Dashboard + Autonomous Reminder Agent (daily cron)

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🏗️ Tech Stack

Category	Technology
Framework	Next.js 16, React 19, TypeScript
Styling	Tailwind CSS v4, shadcn/ui, next-themes
Backend	Next.js API Routes, Server Actions
Database	Supabase PostgreSQL
Authentication	Supabase Auth (PKCE email confirmation)
Storage	Supabase Storage
AI Transcription	Groq Whisper
AI Summarization	Gemini Flash
Validation	Zod
Email	Nodemailer + Gmail SMTP
Deployment	Vercel

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📂 Architecture

Frontend (Next.js 16)
        │
        ▼
Middleware (Auth Guard)
        │
API Routes / Server Actions
        │
 ┌──────────────────────┬───────────────────┐
 ▼                      ▼                   ▼
Supabase           Groq Whisper         Gemini Flash
(DB/Auth/Storage)  (Transcription)      (AI Analysis)
        │
        ▼
 Autonomous Reminder Agent (Vercel Cron)
        │
        ▼
 Gmail SMTP → User Reminder Emails

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🔐 Environment Variables

Create .env.local at the root:

# Supabase
NEXT_PUBLIC_SUPABASE_URL=
NEXT_PUBLIC_SUPABASE_ANON_KEY=
SUPABASE_SERVICE_ROLE_KEY=

# AI APIs
GROQ_API_KEY=
GEMINI_API_KEY=

# Email (Gmail SMTP)
GMAIL_USER=
GMAIL_APP_PASSWORD=

# App
CRON_SECRET=
NEXT_PUBLIC_APP_URL=https://your-app.vercel.app

Important: In your Supabase Dashboard → Authentication → URL Configuration, set:

• Site URL: https://your-app.vercel.app
• Redirect URLs: https://your-app.vercel.app/** and http://localhost:3000/**

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🛠️ Local Development

1. Clone & Install

git clone https://github.com/Devnil434/echonote.git
cd echonote
npm install

2. Set Up Environment Variables

Copy the example and fill in your credentials:

cp .env.example .env.local

3. Run Dev Server

npm run dev

Open http://localhost:3000.

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🗄️ Database Setup

1. Create a project in Supabase
2. Create a public storage bucket named audio
3. Run the SQL schema in the Supabase SQL Editor
4. Configure your Supabase Auth redirect URLs (see Environment Variables above)

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🚀 Deployment

Deploy to Vercel in one step:

git push origin main

Vercel automatically builds and deploys the latest version. Make sure all environment variables from .env.local are added to your Vercel project settings.

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🧩 Future Roadmap

• Semantic search with pgvector
• AI chat with past meetings (RAG)
• Zoom / Google Meet integrations
• Team workspaces & collaboration
• Slack integration
• Real-time transcription
• Meeting analytics dashboard

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👨‍💻 Author

Nilanjan Saha — AI/ML & Full-Stack Developer

• GitHub: github.com/Devnil434
• LinkedIn: (add your LinkedIn URL here)

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⭐ Why EchoNote?

Meetings generate valuable context, but most teams lose it immediately after the call ends.

EchoNote transforms conversations into searchable organizational memory using AI — automatically, without any manual note-taking.

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📄 License

MIT License

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Built with Next.js 16, Supabase, Groq Whisper, Gemini Flash, next-themes, and modern AI SaaS architecture.