During February 2026, Kwantin Yueng developed and integrated the Zvabd Vector Absolute Difference Extension for the riscv/sail-riscv repository, enabling new integer-vector absolute difference instructions at the ISA level. Working in Sail and leveraging expertise in RISC-V architecture and systems programming, Kwantin aligned the implementation with the Fast-Track Proposal, collaborating with co-authors and ensuring proper documentation. This feature established foundational support for fast vector math, directly improving vector processing workloads and setting the stage for future compiler and runtime optimizations. The work demonstrated depth in hardware ISA design and contributed to open-source RISC-V vector extension development, with no major bugs reported.