Worked on the scala/scala3 repository, focusing on dependency management and build stability over a two-month period. Addressed compatibility issues by updating the ScAS subproject to align with evolving syntax requirements, ensuring seamless integration and reducing the risk of build regressions. Applied targeted updates to the SCAS and Mill submodules, which improved build reproducibility and minimized dependency drift within the community-build environment. Demonstrated careful version-control practices and cross-team coordination, validating changes to maintain downstream stability. Utilized Scala and Mill, emphasizing precise dependency alignment and workflow validation to support ongoing ecosystem upgrades and maintain reliable builds across the Scala 3 project.