Worked on the Shopify/shop-chat-agent repository to deliver a configuration-driven feature that governs customer authentication redirect URIs. Focused on enhancing the reliability and security of authentication flows, the work introduced a new section in the shopify.app.toml file, allowing domain-specific authentication callbacks. This approach reduced the risk of misconfiguration and paved the way for multi-domain onboarding scenarios. The implementation relied on strong configuration management practices using TOML, with changes tracked in a clear, single commit. No bugs were addressed during this period, and the work centered on configuration as the primary technical skill, emphasizing readiness for deployment and maintainability.