Worked on the containers/podman-compose repository to deliver extra_hosts support in build arguments, enabling more flexible networking configurations for multi-host container deployments. The feature involved parsing and handling extra_hosts within the build process, ensuring users could specify additional host mappings at build time. Emphasized test-driven development by adding targeted tests to validate correct parsing and behavior, which improved reliability and maintainability. Maintained repository hygiene through news fragment updates and proper commit sign-off. Utilized Python and YAML to implement and verify the changes, demonstrating skills in container orchestration, automated testing, and codebase stewardship over the course of the development period.