Worked on enhancing CI workflows for the swiftlang/github-workflows repository, focusing on improving correctness and configurability. Developed a feature that enables one-level git submodule checkout during soundness checks, ensuring accurate validation of submodule dependencies within the CI process. Introduced support for overriding yamllint configuration by detecting a local .yamllint.yml file, which allows for flexible linting standards while maintaining a fallback to the default configuration. Leveraged skills in CI/CD, configuration management, and GitHub Actions, utilizing Shell and YAML to implement these changes. The updates reduced CI noise and improved reliability by validating submodule handling and lint configuration paths.