Worked on the github-maccloud/runner-images repository to refine documentation for the macos-15-arm64 image, focusing on updating the README to accurately reflect the 20250210.664 image version and its software stack. Leveraged Markdown and version control skills to document changes across tools such as Kotlin, Node.js, Python, Homebrew, and AWS CLI, ensuring that all updates were traceable and aligned with the current image state. This targeted documentation effort aimed to reduce ambiguity for developers, streamline onboarding, and minimize risks in CI workflows by providing clear, up-to-date information about OS, kernel, and tool versions within the maintained image.