DocuMind 🧠

DocuMind is a SaaS application that uses Google's Gemini 1.5 Flash to help users summarize, rewrite, and analyze documents in seconds. Built with Next.js 16, it features real-time AI streaming, PDF text extraction, and a robust rate-limiting system.

(Replace this link with your actual screenshot from the landing page)

🚀 Tech Stack

• Framework: Next.js 16 (App Router, Server Actions)
• Language: TypeScript
• AI Model: Google Gemini 1.5 Flash (via Vercel AI SDK)
• Database: PostgreSQL (Neon)
• ORM: Drizzle ORM
• Authentication: Clerk
• Styling: Tailwind CSS & Shadcn UI
• Rate Limiting: Upstash Redis
• File Parsing: pdf-parse (Server-side PDF extraction)

✨ Key Features

• 📄 PDF & Text Support: Upload PDF files or write generic text. The app automatically parses binary files into editable text.
• ⚡ Real-Time Streaming: AI responses stream instantly to the client, providing a "chat-like" experience without loading spinners.
• 🛡️ Rate Limiting: Built-in protection using Redis to limit free users to 3 generations per day.
• 📝 Live Editor: Edit original documents and AI outputs side-by-side. Changes are saved to the database automatically.
• 🔐 Secure Auth: Full authentication flow (Sign Up, Login, Protected Routes) using Clerk.
• 📱 Responsive: Fully responsive dashboard and landing page designed with a mobile-first approach.

🛠️ Getting Started

Prerequisites

• Node.js 18+
• A Clerk account
• A Neon (Postgres) account
• A Google AI Studio API Key
• An Upstash (Redis) account

1. Clone the repository

git clone [https://github.com/yourusername/documind.git](https://github.com/yourusername/documind.git)
cd documind

2. Install dependencies

npm install
# or
yarn install
# or
pnpm install
# or
bun install

3. Set up environment variables

Create a .env.local file in the root directory and add the following variables:

NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY=your-clerk-publishable-key
CLERK_SECRET_KEY=your-clerk-secret-key
CLERK_WEBHOOK_SECRET=your-clerk-webhook-secret

# Neon (PostgreSQL)
DATABASE_URL=postgresql://username:password@host:port/database

# Upstash Redis
UPSTASH_REDIS_REST_URL=your-upstash-redis-url
UPSTASH_REDIS_REST_TOKEN=your-upstash-redis-token

# Google AI Studio
GOOGLE_API_KEY=your-google-api-key

4. Database Migration

npm run db:push

5. Run the development server

npm run dev

Open http://localhost:3000 with your browser to see the result.

Important Configuration Note

To hadle PDF parsing on the server without building errors, next.config.js must include pdf-parse in serverExternalPackages:

const nextConfig = {
  experimental: {
    serverActions: {
      bodySizeLimit: "5mb",
    },
  },
  serverExternalPackages: ["pdf-parse"],
};