During May 2025, Astellin focused on backend development and security improvements for the renovatebot/renovate repository. They addressed a potential injection vulnerability in dependency management by updating package manager commands to quote arguments across multiple modules. This technical approach reduced the risk of command injection and parsing errors, thereby enhancing the reliability and robustness of automated dependency updates. Working primarily with JavaScript and TypeScript, Astellin applied skills in dependency management, security, and testing to strengthen command-argument handling. While the work centered on bug fixing rather than feature development, it demonstrated careful attention to detail and a strong understanding of secure coding practices.