Gavin Mak focused on build system configuration and dependency management during May 2025, working across the AvaloniaUI/angle and google/dawn repositories. He removed the deprecated --no_auth flag from download_from_google_storage hooks, streamlining build configurations and eliminating obsolete options without affecting runtime behavior. This cross-repository deprecation cleanup reduced maintenance overhead and improved configuration clarity for future contributors. Gavin applied his expertise in Python and depot tools to ensure that the changes maintained system stability while simplifying onboarding for new developers. The work demonstrated a methodical approach to technical debt reduction and contributed to the long-term maintainability of both codebases.