Worked on the Shopify/extensions-templates repository to stabilize customer segmentation query handling by addressing a compatibility flaw in the Customer Segmentation Data Extension. Focused on updating Liquid templating syntax, the work involved modifying the 'products_purchased' filter to use the MATCHES operator and correcting the insertion of pipe characters for product IDs, ensuring alignment with new query parsing rules. This targeted bug fix improved the reliability of segmentation analytics and reduced the risk of misqueries in production environments. Leveraged skills in Data Extension and Liquid to enhance maintainability and accuracy within the query layer, contributing to more robust customer data segmentation.