Worked on the microsoft/rushstack repository to enhance security and stability by addressing a critical dependency vulnerability. Focused on upgrading the AJV library to version 8.18.0 in response to CVE-2025-69873, the work involved updating both package.json and pnpm-lock.yaml to maintain a clean, reproducible dependency graph. Collaborated with other contributors to validate the dependency tree and ensure build stability after the upgrade. Utilized skills in dependency management, package management, and security updates, working primarily with JSON and JavaScript. This effort strengthened the security posture of Rushstack and its downstream consumers by proactively remediating a known vulnerability in the dependency chain.