During April 2025, Brandon Gaston focused on improving the swiftlang/swift-build repository by addressing a persistent issue with CI noise and false positives in Xcode builds. He implemented a targeted fix in C++ and Swift, introducing a new libcxx compiler flag to disable ASAN container overflow checks specifically for Xcode projects. This adjustment maintained compatibility with existing workflows while reducing unnecessary test failures. Brandon updated and validated the relevant test cases to ensure the change preserved intended behavior. His work demonstrated a strong understanding of build systems, compiler flags, and testing, resulting in a more stable and reliable development environment.