requirements.txt

# ============================================================
# requirements.txt — RENDER PRODUCTION (lightweight)
# No torch · no sentence-transformers · no ragas · no CUDA
# Uses OpenAI embeddings (text-embedding-3-small) instead
# ============================================================

# Core LLM & Orchestration
langchain==0.3.25
langchain-openai==0.3.16
langchain-community==0.3.24
langchain-text-splitters==0.3.8
langgraph==0.4.1
openai==1.78.0

# Vector Stores
faiss-cpu==1.9.0.post1
# pinecone==6.0.0  # Optional — only needed if VECTOR_STORE_TYPE=pinecone
#                  # Uncomment and set PINECONE_API_KEY in .env to enable

# API Backend
fastapi==0.115.12
uvicorn[standard]==0.34.2
pydantic==2.11.4
python-multipart==0.0.20

# Keyword search
rank-bm25==0.2.2

# Data & Utilities
pypdf==5.4.0
pdfplumber==0.11.4
# pytesseract==0.3.13  # requires system Tesseract binary — not on Render free tier
# pdf2image==1.17.0    # requires system poppler — not on Render free tier
Pillow==11.0.0
tiktoken==0.9.0
numpy>=1.26.4
pandas==2.2.3
python-dotenv==1.1.0
httpx==0.28.1

# Monitoring & Logging
loguru==0.7.3
prometheus-client==0.22.0
sentry-sdk

# Authentication & Security
pyjwt==2.10.1
bcrypt==4.2.1

# Database
sqlalchemy==2.0.36

# Data Visualization
plotly==5.24.1

# Medical-domain embeddings + NER (lazy-imported — ~1 GB download on first use)
# BioBERT embeddings: pritamdeka/S-BioBert-snli-multinli-stsb
# Medical NER:        blaze999/Medical-NER
sentence-transformers>=2.7.0
transformers>=4.40.0

# PDF export (Ask AI page download button)
fpdf2>=2.7.0

# Multi-Agent External Tools (optional — lazy-imported, not required on Render)
# tavily-python==0.7.23
# langchain-nvidia-ai-endpoints==1.2.1