Thomas Reppesgård enhanced the CI build workflow in the felleslosninger/github-workflows repository by introducing support for EUW- prefixes in pull request titles. This update, implemented using JavaScript and GitHub Actions, automated the recognition and processing of EUW-related PRs, reducing the need for manual validation and minimizing the risk of misrouted changes. Thomas focused on workflow automation and CI/CD best practices, configuring the system to parse and validate PR titles more flexibly. The work streamlined cross-team collaboration and improved release readiness, demonstrating a solid understanding of workflow configuration and the practical application of automation in continuous integration environments.