Mads Christensen focused on maintenance and security hardening for the LIT-Protocol/js-sdk repository during April 2025. He addressed dependency management by updating the yarn.lock file, ensuring all dependencies such as @lit-protocol/accs-schemas, string-width, and wrap-ansi reflected the latest compatible versions. This work, implemented using YAML and modern dependency management practices, aimed to reduce dependency drift and enhance build reproducibility. By verifying and applying the lockfile update, Mads improved the project’s security posture and build consistency without introducing new features. His contribution demonstrated a methodical approach to maintaining software reliability through careful dependency updates and security-focused engineering practices.