During January 2026, Matt Phelps focused on enhancing the replicate/cog repository by migrating integration tests from Python to Go, consolidating test suites, and embedding predictor fixtures directly in code to streamline cross-platform testing. He implemented robust SemVer and PEP440 version compatibility within the build process, ensuring accurate version validation and reducing release-time conflicts. Leveraging Go, Python, and YAML, Matt stabilized the CI pipeline by removing unreliable tests and standardizing job timeouts, which improved reliability and resource efficiency. His work emphasized test governance through improved documentation and test selection, resulting in faster feedback loops and reduced risk during software delivery.