Hunter Tinney stabilized authentication flows in the instantdb/instant repository by addressing a critical issue with Apple Sign-In after changes to OpenID issuer metadata. Using Clojure and leveraging expertise in authentication and backend development, Hunter implemented a robust issuer validation fix that accepts both known Apple issuer URLs. This solution ensured continued compatibility and prevented sign-in failures for users following Apple’s metadata updates. The work focused on maintaining authentication reliability and minimizing production risk, with clear commit messaging linked to issue tracking for future audits. Hunter’s targeted bug fix reduced user impact and support inquiries, demonstrating careful attention to code quality and maintainability.