rag_agent/
├── app.py # Main Gradio application entry point
├── config.py # Configuration hub (models, chunk sizes, providers)
├── util.py # PDF to markdown conversion
├── core/ # Core RAG components orchestration
│ ├── chat_interface.py
│ ├── document_manager.py
│ └── rag_system.py
├── knowledge_base/ # for create chromadb
├── chroma_data/ # chroma vectorstore data
├── agent_logic/ # LangGraph agent workflow
│ ├── edges.py # Conditional routing logic
│ ├── graph.py # Graph construction and compilation
│ ├── graph_state.py # State definitions
│ ├── nodes.py # Processing nodes (summarize, rewrite, agent)
│ ├── prompts.py # System prompts
│ ├── schemas.py # Pydantic data models
│ └── tools.py # Retrieval tools
└── ui/ # User interface
└── gradio_app.py # Gradio interface components