UserHarbor: A Framework-Agnostic Python Library for Modular User Management

UserHarbor is an early-stage, open-source Python library designed to handle user account management — including registration, authentication, session control, RBAC, and password resets — without being tied to any specific web framework or database toolkit. A developer recently used IBM Bob to build a reference application integrating UserHarbor with FastAPI, SQLAlchemy, and SMTP to demonstrate its modular capabilities end-to-end. The library's architecture separates core business logic from framework adapters, persistence layers, and external services through dedicated packages such as userharbor-fastapi, userharbor-sqlalchemy, and userharbor-smtp. UserHarbor can be plugged into FastAPI, Flask, Django, Litestar, or even CLI environments, making it broadly flexible for different project setups. The project is still in active early development, with a frequently changing API and no current recommendation for production use.