Ankit Kumar focused on improving the reliability of product search in the bigcommerce/b2b-buyer-portal repository by addressing a recurring 400 Bad Request error. He refactored the GraphQL query construction in TypeScript, replacing string interpolation with GraphQL variables to ensure special characters, such as double quotes, were handled safely and consistently. This targeted change, limited to a single file, aligned the codebase with best practices for API development and enhanced maintainability. Ankit also updated related storefront tests and the MSW GraphQL handler, validating the fix across various search scenarios and demonstrating a methodical, test-driven approach to backend reliability.