During September 2025, Wenhao Zhang modernized the CI infrastructure for the cmu-db/bustub repository by migrating build jobs from Ubuntu 24.04-based runners to self-hosted runners. This transition leveraged internal infrastructure to improve resource availability and potentially reduce build times, addressing bottlenecks associated with external CI dependencies. Wenhao implemented the migration through targeted OS configuration updates in the CI pipeline, using YAML and GitHub Actions to ensure a smooth transition. The work enhanced build pipeline predictability and throughput while maintaining compatibility with existing workflows, demonstrating a focused approach to CI/CD optimization within a short timeframe and with minimal disruption to developers.