requirements.txt

# ============================================================================
# MINIMAL Requirements for Hugging Face Space
# Only absolutely essential packages - others will be installed as dependencies
# ============================================================================

# Web Framework
fastapi==0.118.2
uvicorn[standard]==0.37.0
slowapi==0.1.9

# LangChain & LangGraph - Core only (dependencies will pull others)
langgraph==0.6.8
langchain==0.3.27
langchain-openai==0.3.35
langchain-mongodb==0.7.0

# LangGraph Checkpointing
langgraph-checkpoint-postgres==2.0.25

# Database - CRITICAL: Use psycopg-binary for Hugging Face
psycopg[binary]==3.2.10
psycopg-binary==3.2.10
psycopg-pool==3.2.6
pymongo==4.15.3

# OpenAI
openai==1.109.1

# Pydantic - MUST specify exact versions for serialization
pydantic==2.11.10
pydantic-core==2.33.2

# Document Processing
pypdf==6.1.1

# Utilities
python-dotenv==1.1.1
lxml==6.0.2

# Optional but recommended
langsmith==0.4.33
rich==14.1.0