requirements.txt

# LangGraph orchestration
langgraph>=0.2.0,<1.0.0
langgraph-checkpoint-sqlite>=2.0.0,<3.0.0

# LangChain (required for LangGraph and LangFuse callback integration)
langchain>=0.3.0,<1.0.0
langchain-openai>=0.2.0,<1.0.0

# PDF processing
pdfplumber>=0.11.0,<1.0.0

# OCR for scanned PDFs
python-doctr[torch]>=0.10.0,<1.0.0

# PDF report generation
reportlab>=4.2.0,<5.0.0

# Image processing (optional, for generating test scanned PDFs)
Pillow>=10.0.0,<12.0.0

# LLM observability (callback handler for LangGraph tracing)
langfuse[langchain]>=2.50.0,<3.0.0

# Web UI
streamlit>=1.30.0,<2.0.0
streamlit-authenticator>=0.3.0,<1.0.0

# RAG / Vector Store
chromadb>=0.4.24,<0.5.0
langchain-chroma>=0.1.0,<1.0.0
langchain-huggingface>=0.1.0,<1.0.0
sentence-transformers>=3.0.0

# Python 3.13 compatibility - pin versions with pre-built wheels
scipy>=1.14.0
shapely>=2.0.6

# HTTP client for external APIs
httpx>=0.27.0,<1.0.0

# Email sending
maileroo>=1.0.0

# Configuration and data models
python-dotenv>=1.0.0,<2.0.0
pydantic>=2.0.0,<3.0.0