Rob MacEachern delivered a targeted dependency upgrade for the square/workflow-swift repository, focusing on enhancing build stability and maintainability. He upgraded the Perception package to version 2.0.6, carefully aligning both Package.swift and Package.resolved to ensure reproducible builds and streamline future dependency changes. By standardizing version ranges and refining package management practices, Rob positioned the project for smoother upgrade cycles and reduced technical debt. Working primarily in Swift, he applied his expertise in dependency and package management to address long-term maintainability, even though no critical bugs were reported during this period. The work demonstrated depth in infrastructure-focused engineering.