Michael Ernst modernized the Gradle build system for the uber/NullAway repository, focusing on internal infrastructure improvements. He removed deprecated buildDir usage and migrated build scripts to leverage modern Gradle APIs, enhancing build compatibility and maintainability. This work, implemented entirely in Gradle, did not introduce user-facing changes but reduced the risk of future deprecations and streamlined ongoing maintenance. By aligning the build configuration with current tooling standards, Michael improved the reliability of CI/CD pipelines and enabled faster automated builds. His efforts demonstrated depth in build configuration and refactoring, contributing to the long-term health and stability of the project’s infrastructure.