requirements.txt

# Core UI
gradio>=4.37.0
flask
# Embeddings / transformers
sentence-transformers==2.7.0
transformers>=4.40.0

# Torch backend (CPU is fine on HF Spaces free tier)
torch>=2.2.0

# PDF + utils
PyPDF2==3.0.1
numpy<2

# Vector search
faiss-cpu==1.8.0

accelerate>=0.28.0
scikit-learn>=1.3.0