OAuth 2.1 Provider Framework for Cloudflare Workers: An AI-Assisted Security Library

This TypeScript library implements the provider side of the OAuth 2.1 protocol with PKCE support for Cloudflare Workers. It acts as a wrapper, automating token management and user authentication. Developers write regular fetch handlers; the library handles authentication. It's agnostic to user management and UI frameworks, storing only hashes, not secrets. Interestingly, the library's development involved AI model Claude, with Cloudflare engineers' security review validating AI's potential in software development. The library also features a novel approach to refresh token management, balancing security with resilience to transient errors.