During October 2025, Hiroki Ota focused on targeted reliability improvements in autonomous driving software, addressing two critical bugs across the autowarefoundation/autoware and technolojin/autoware.universe repositories. He resolved a CCACHE_DIR misconfiguration by aligning cache usage with user home directories, reducing build failures and streamlining developer onboarding. In parallel, he enhanced the traffic light arbiter by introducing timestamp-based deduplication for external predictions, ensuring only the most recent data influenced autonomous decisions. Working primarily in C++ and YAML, Hiroki applied his expertise in CI/CD, configuration management, and robotics to deliver robust, maintainable solutions that improved system stability and operational accuracy.