🤖 AI Assistant with LangChain & LangGraph

This project is a terminal-based AI assistant built using:

• LangChain for managing prompts and tools
• LangGraph for agent orchestration
• OpenAI API as the backend LLM
• Python for development

💡 Features

The assistant can:

• 🔢 Perform basic arithmetic (calculator)
• 📏 Convert meters to feet
• ⏰ Tell the current time and date
• 📝 Summarize short text
• 😂 Tell random programming jokes
• 🙋 Greet the user by name

🧪 Example Interactions

You: Add 10 and 25  
Assistant: The result of adding 10.0 and 25.0 is 35.0

You: Convert 5 meters to feet  
Assistant: 5.0 meters is equal to 16.40 feet

You: What’s the current time?  
Assistant: Current date and time: 2025-08-03 00:30:00

You: Summarize this: LangChain is a framework for developing LLM-based applications...  
Assistant: Summary: LangChain is a framework for developing LLM-b...

You: Tell me a joke  
Assistant: Why do programmers prefer dark mode? Because light attracts bugs!

You: Greet Arsh  
Assistant: Hello Arsh! I'm happy to assist you today 😊

🔧 Setup Instructions

1. Clone the Repository

git clone https://github.com/Arsh-pixel-cmd/ai-assistant-langchain.git
cd ai-assistant-langchain

2. Set Up Virtual Environment

python -m venv .venv
source .venv/bin/activate  # On Windows: .venv\Scripts\activate

3. Install Dependencies

pip install -r requirements.txt

Or if you're using uv:

uv pip install -r pyproject.toml

4. Add .env File

Create a .env file and add your OpenAI API key:

.env

OPENAI_API_KEY=sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

5. Run the Assistant

python main.py

📁 Project Structure

. ├── main.py # Main assistant logic ├── pyproject.toml # Dependency and project metadata ├── .gitignore # Ignored files and folders ├── .env # Contains your OpenAI API Key (excluded from Git) ├── .venv/ # Virtual environment (excluded) ├── .mypy_cache/ # Cache (excluded) └── README.md # You're reading this!

📜 License

This project is licensed under the MIT License.