requirements.txt

# API
fastapi==0.116.1
uvicorn==0.35.0

# LangChain ecosystem - only what's needed
langchain==0.3.27
langchain_community==0.3.27
langchain_openai==0.3.28
langchain_huggingface==0.3.1
langchain-pymupdf4llm==0.4.1

# OpenAI
openai==1.99.2

# Data processing
pandas==2.3.1
pydantic==2.11.7

# Utilities
python-dotenv==1.1.1
pytz==2025.2
requests==2.32.4

# Embeddings and search - CPU optimized versions
sentence-transformers==5.0.0
faiss-cpu==1.11.0.post1  # CPU version is much smaller
rank-bm25==0.2.2

# Fix for numpy and torch compatibility
numpy<2
torch==2.2.2+cpu
--extra-index-url https://download.pytorch.org/whl/cpu

# Document generation
python-docx==1.1.2
reportlab==4.2.5

# Authentication
python-multipart>=0.0.18
itsdangerous==2.2.0