requirements.txt

# --- Core backend ---
fastapi==0.115.0
uvicorn==0.29.0
python-dotenv==1.0.1

# --- LangChain stack ---
langchain==0.1.16
langchain-community==0.0.32
langchain-groq==0.1.0
sentence-transformers==2.2.2
faiss-cpu==1.7.4
tiktoken==0.7.0
rank-bm25==0.2.2

# --- Fix for sentence-transformers dependency ---
huggingface-hub==0.24.6

# --- PDF + text processing ---
pypdf==3.17.1
unstructured==0.10.30

# --- Optional frontend for local tests ---
gradio==5.49.1