In November 2025, Crashoverride025 contributed to the com-lihaoyi/mill repository by implementing build-time test coverage validation, ensuring that minimum coverage thresholds are enforced during the build process. This feature introduced new validation methods and integrated coverage reporting, causing builds to fail automatically if coverage requirements were not met. The approach aligned with scoverage and sbt-scoverage semantics, supporting early detection of test gaps and reducing the risk of regressions. Crashoverride025 collaborated with other contributors on this Scala-based project, applying skills in build automation and testing to enhance the reliability and maintainability of the build pipeline through automated quality checks.