Worked on improving the continuous integration environment for the EsotericSoftware/spine-runtimes repository by updating the format-check workflow to use the ubuntu-22.04 runner. Focused on build automation and CI configuration, the update targeted the build job to reduce environment-related failures and enhance reliability. Leveraged GitHub Actions and shell scripting to ensure a more deterministic and maintainable CI process, which helps minimize debugging time and accelerates integration of future changes. No user-facing features or bug fixes were released during this period, as the primary objective was to establish a stable foundation for ongoing and upcoming development work within the project.