multi_llm_chatbot_backend/requirements.txt

# Core FastAPI framework
fastapi~=0.135
uvicorn[standard]~=0.44
python-multipart~=0.0

# HTTP client for LLM APIs
httpx~=0.28
openai~=2.30
huggingface-hub~=0.36

# Document processing
PyPDF2~=3.0
docx2txt~=0.9
python-docx~=1.2

# Environment configuration
python-dotenv~=1.2
pyyaml~=6.0

# Persona color generation
colorhash~=2.3

# Vector database and embeddings
chromadb~=1.5
sentence-transformers~=5.3

# Natural language processing
nltk~=3.9
tiktoken~=0.12
markdown~=3.0

# PDF generation and export
reportlab~=4.4

# Persistence: SQLite via aiosqlite on the HF Storage Bucket mount (no MongoDB).
# pymongo is kept *only* for bson.ObjectId and the DuplicateKeyError /
# PyMongoError types that the existing routers and the SQLite shim raise.
aiosqlite~=0.20
pymongo~=4.16

# Authentication and security
passlib[bcrypt]~=1.7
bcrypt~=4.3
python-jose[cryptography]~=3.5

# Data validation (required for EmailStr in Pydantic)
email-validator~=2.3