In October 2025, Stephen Falken focused on build system configuration and dependency management for the canonical/mir repository. He removed the unused Boost.System dependency from multiple CMakeLists.txt files, targeting compatibility with Boost versions greater than 1.66. This change streamlined the build process, reduced maintenance overhead, and minimized the risk of dependency-related issues during upgrades. Working primarily with C++ and CMake, Stephen ensured that the cleanup had no runtime impact while improving build reliability. The updated configuration also provided a clearer upgrade path for future Boost versions, making contributor onboarding more straightforward and enhancing the overall maintainability of the project.