Worked on stabilizing and enhancing the Discount function settings UI within the Shopify/extensions-templates repository, focusing on front end development using JavaScript and Preact. Addressed a persistent infinite useEffect loop and resolved issues with a broken select menu, directly improving the reliability and user experience of the discount configuration workflow. Refactored the metafield configuration parsing logic to leverage useMemo, reducing unnecessary recomputations and optimizing performance. Additionally, replaced standard HTML option elements with custom s-option components to further increase interface stability. The work emphasized maintainability and performance, resulting in a more robust and user-friendly discount settings interface.