🧠 LangChain Q&A Assistant

This project is a Conversational Q&A Assistant built with LangChain, Streamlit, and open-source as well as closed-source models (Groq and HuggingFace).

🚀 Features

• 🔁 Choose between Open-Source (HuggingFace API / Local) or Closed-Source (Groq) models.
• 🤖 Dynamic model selection with support for TinyLlama, Groq LLaMA, and Mistral.
• 💬 Chat memory management with MessagesPlaceholder.
• 🧩 Prompt engineering using both PromptTemplate and ChatPromptTemplate.
• 📦 Structured output parsing using PydanticOutputParser.
• 🖥️ Streamlit UI with:
  • Dropdowns for model selection
  • Text input for queries
  • Toggle for chat history
  • Response display section

📸 Screenshots