InfoFlow AI v4 — MCP + LangSmith Enabled (Colab-ready)

This version integrates:

• Real HTTP search endpoints (Serper) in the MCP-like agent (uses environment keys SERPER_API_KEY)
• LangSmith tracing for every node call (if LANGSMITH_API_KEY present and langsmith installed)
• OpenAI via LangChain (requires OPENAI_API_KEY)
• Fallbacks: Wikipedia search and rule-based summarizer -> ensures meaningful outputs offline
• Gradio UI with share=True (works in Colab)

Quickstart (Colab):

1. pip install -r requirements.txt

2. (optional) pip install transformers[sentencepiece] accelerate

3. cp .env.example .env and fill keys:

   • OPENAI_API_KEY (recommended)
   • LANGSMITH_API_KEY (optional, for LangSmith traces)
   • SERPAPI_API_KEY or SERPER_API_KEY (optional, for real HTTP search)

4. python ui/app_ui.py # click the gradio.live public link Notes:

• Serper.dev: https://serper.dev/ (requires key)