Worked on the openclaw/openclaw repository to enhance security for cron job logs and store files by implementing strict 600 file permissions across these resources and their parent directories. Updated the file system operations in Node.js to ensure that both file writing and directory creation logic consistently enforced the new access controls. Developed comprehensive tests in JavaScript and TypeScript to verify that the updated permissions were correctly applied, supporting compliance with security best practices. This work reduced the risk of unauthorized data exposure and strengthened overall access control, reflecting a focused approach to secure file handling and robust testing within the project.