Arr worked on stabilizing the build pipeline for the facebook/buck2-prelude repository by temporarily disabling the link order fixup feature to address performance and memory concerns. Using Bzl and build system configuration skills, Arr implemented this change to reduce build variability and memory pressure while longer-term performance improvements are developed. The technical approach included documenting the rationale and outlining a roadmap for safely re-enabling the feature in the future, ensuring clear governance and traceability. This focused effort prioritized system stability in a high-risk area, laying a solid foundation for upcoming optimizations and maintaining predictable performance throughout the development cycle.