Cyrus Ho enhanced the OIDC-based single sign-on flow in the better-auth/better-auth repository by implementing OIDC discovery hydration, addressing gaps in authentication reliability across APIs. Using TypeScript and leveraging full stack development and API integration skills, Cyrus engineered a solution that programmatically fills missing endpoints from the OIDC discovery document, ensuring consistent authentication flows in multi-service environments. This approach stabilized session management and reduced discovery-related errors, directly improving cross-service authentication integrity. The work focused on robust testing to validate the new logic, ultimately reducing support friction for customers relying on SSO. The contribution demonstrated thoughtful depth in authentication infrastructure.