A lightweight Streamlit chat app powered by GitHub Models via langchain-azure-ai.
It supports:

• ✅ GitHub token input in the UI (no hard-coding needed)
• ✅ System prompt customization
• ✅ Chat history that persists for the session
• ✅ Multiple model choices
• ✅ Safe token handling (stored only in session state)
• ✅ Clear chat functionality

uv init
uv add streamlit langchain-azure-ai

First get your GitHub access token from https://github.com/settings/apps.

You have two options to provide the token in the app:

1. Easiest (local testing) – Paste it in the sidebar when running the app.
2. Environment variable

export GITHUB_TOKEN="ghp_...your_token..."

uv run streamlit run app.py

1. Start the app (above command).
2. Open the URL shown in your terminal (usually http://localhost:8501).