Worked on enhancing AV1 decoding performance in the gittools-bot/homebrew-core repository by integrating dav1d as the primary AV1 decoder for libavif. Focused on build system configuration using Ruby and CMake, the developer replaced the previous aomdec decoder path with dav1d, enabling this change through a dedicated CMake build flag. This approach reduced decoding time and CPU usage for AVIF workloads, directly benefiting both developer builds and end-user applications that rely on libavif. The work demonstrated a targeted solution to improve media efficiency, emphasizing careful dependency management and build process optimization without introducing new bugs during the release period.