During February 2026, JT Warren focused on stabilizing build systems by rolling back the gc-sections subtarget in the C++ toolchain across the facebook/buck2 and facebook/buck2-prelude repositories. Using expertise in C++, Python, and toolchain development, JT coordinated a cross-repository rollback to address compatibility issues affecting the HHVM release pipeline. The technical approach involved removing gc-sections data and related functions, restoring reliable builds and ensuring smoother releases. Unified commit messages and thorough documentation established a clear rollback history. This work demonstrated careful attention to build integrity and cross-team collaboration, resulting in reduced release blockers and improved stability for ongoing development efforts.