Alexander Moriarty updated the RoboCupAtHome/RuleBook repository by implementing an Arena Accessibility enhancement focused on door accessibility rules. Using LaTeX for documentation, Alexander specified a required minimum door width and recommended a standard of 915mm, ensuring robots can navigate the arena more reliably and safely. This change addressed issue #945 and aligned the rulebook with broader accessibility and usability goals. The work involved a single feature commit and did not include bug fixes, reflecting a targeted documentation effort. Alexander’s contribution improved the consistency and governance of arena standards, supporting compliance and reducing navigation errors for autonomous robotic systems.