Worked on enhancing payment processing capabilities within the Shopify/extensions-templates repository by updating API versions and introducing refund session URLs for payment extensions. Focused on aligning extension templates with the latest API changes, the work reduced the risk of integration drift and improved the reliability of customer refund flows. Leveraged skills in API integration, payment processing, and template development, primarily using Liquid to ensure maintainable and traceable code changes. The approach emphasized clear commit history and maintainability, supporting faster and more reliable transactions for end users. No bugs were fixed during this period, with efforts concentrated on delivering a single feature update.