LangGraph Chatbot with Memory

A simple conversational chatbot built with LangGraph and Groq that remembers your name across the conversation.

Setup

1. Install dependencies

   pip install langgraph langchain-groq langchain-core python-dotenv

2. Add your API key
   Create a .env file in the project root:

   GROQ_API_KEY=your_key_here
   

   Get a free key at console.groq.com

3. Run the chatbot

   python main.py

Project Structure

├── .env          ← API key (never commit this)
├── .gitignore
├── state.py      ← shared state definition
├── nodes.py      ← LLM logic
├── graph.py      ← graph wiring
└── main.py       ← entry point

Example

You: Hi! My name is Ritika
Bot: Hi Ritika! Great to meet you. How can I help you today?

You: What's the capital of France?
Bot: The capital of France is Paris, Ritika!

You: What's my name?
Bot: Your name is Ritika!

Tech Stack

• LangGraph — agent framework
• Groq — free LLM API (Llama 3.1)
• LangChain — LLM utilities