Masahide Yamada upgraded the continuous integration workflow for the team-mirai/policy repository by modernizing Markdown link checking in May 2025. He migrated the project from a legacy configuration to umbrelladocs/action-linkspector, introducing a dedicated YAML configuration file to define directories, ignore patterns, and specialized handling for government and social media links. This transition eliminated obsolete configuration files and streamlined the CI process, reducing false positives and improving documentation reliability. Masahide applied his expertise in CI/CD, configuration management, and GitHub Actions, delivering a focused solution that enhanced the feedback loop for pull requests and reduced maintenance overhead for the team.