During February 2025, this developer updated the documentation for the github-maccloud/runner-images repository, focusing on the macos-15-arm64 image. They revised the README to accurately reflect the 20250210.664 image version, detailing changes in the OS, kernel, and a wide range of development tools such as Kotlin, Node.js, and Python. Using Markdown and version control best practices, they ensured that the documentation precisely matched the current image state. This work improved onboarding for new developers and reduced the risk of CI failures due to outdated information, demonstrating careful attention to detail and a methodical approach to documentation accuracy.