Worked on the web-platform-tests/wpt-metadata repository to enhance metadata handling and expand automated test coverage. Upgraded YAML processing from v3 to v4 using Go, improving the robustness of parsing complex metadata such as subtest names. Optimized file handling by adopting compact sequence indentation, which reduced diffs and improved maintainability of metadata files. Standardized bug-report URLs to HTTPS for greater clarity and reliability in metadata management. Added new CSS Container Queries tests, increasing coverage for scenarios involving multiple style containers. Focused on test automation and library management, these contributions improved overall test reliability and streamlined continuous integration workflows for the project.