✦ LingAI — Intelligent AI Assistant

A beautiful, ChatGPT-style AI chat app powered by Claude (Anthropic).
Real-time streaming responses, conversation history, and a polished dark UI.

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🚀 Quick Start

1. Prerequisites

• Node.js v18 or higher
• An Anthropic API key

2. Clone the repo

git clone https://github.com/YOUR_USERNAME/lingai.git
cd lingai

3. Install dependencies

npm install

4. Set up your API key

cp .env.example .env

Open .env and replace your_api_key_here with your real Anthropic API key:

ANTHROPIC_API_KEY=sk-ant-xxxxxxxxxxxxxxxx
PORT=3000

5. Run the app

npm start

Open your browser at → http://localhost:3000

For development with auto-reload:

npm run dev

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📁 Project Structure

lingai/
├── public/
│   └── index.html       # Full frontend (HTML + CSS + JS)
├── server.js            # Express backend with streaming API
├── package.json
├── .env.example         # Copy to .env and add your key
├── .gitignore
└── README.md

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☁️ Deploy to GitHub

Step 1 — Create a new GitHub repo

1. Go to https://github.com/new
2. Name it lingai
3. Leave it empty (no README)
4. Click Create repository

Step 2 — Push your code

cd lingai
git init
git add .
git commit -m "Initial commit — LingAI"
git branch -M main
git remote add origin https://github.com/YOUR_USERNAME/lingai.git
git push -u origin main

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🌐 Deploy to the Internet (Free)

Option A — Render.com (recommended, free tier)

1. Go to https://render.com and sign in with GitHub
2. Click New → Web Service
3. Select your lingai repo
4. Settings:
   • Build Command: npm install
   • Start Command: npm start
   • Environment: Node
5. Add environment variable: ANTHROPIC_API_KEY = your key
6. Click Deploy — you get a live URL in ~2 minutes!

Option B — Railway.app

1. Go to https://railway.app
2. New Project → Deploy from GitHub repo
3. Add ANTHROPIC_API_KEY in Variables tab
4. Done — Railway auto-detects Node and deploys

Option C — Fly.io

npm install -g flyctl
flyctl auth login
flyctl launch
flyctl secrets set ANTHROPIC_API_KEY=sk-ant-xxxxxxxx
flyctl deploy

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✨ Features

• 💬 Real-time streaming responses
• 🧠 Powered by Claude Sonnet 4 (Anthropic)
• 💾 Conversation history saved in browser
• 🌙 Elegant dark UI with animations
• 📱 Responsive layout
• ⚡ Lightweight — no build tools needed

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🔑 Getting an Anthropic API Key

1. Go to https://console.anthropic.com/
2. Sign up / log in
3. Navigate to API Keys
4. Click Create Key
5. Copy and paste into your .env file

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📄 License

MIT — free to use, modify, and distribute.