In January 2025, Steven McGruer focused on stabilizing the denoland/chromium_build repository by addressing nondeterministic behavior in the build system. He identified that a recent build.ninja linker-input parsing change had introduced CI failures due to inconsistent handling of public and private GN target inputs. To resolve this, Steven reverted the problematic change, restoring deterministic builds and reducing flaky test outcomes across CI environments. His work emphasized reliability and reproducibility, leveraging skills in build systems, code reversion, and debugging. Using GN and Python, Steven maintained repository stability through a careful rollback, ensuring a clear audit trail and improved CI cycle consistency.