Worked on the kolyma-labs/instances repository to enhance player identity tracking for a Minecraft server by introducing a new UUID to the supported player identifiers. This configuration management task was approached with a focus on minimizing deployment risk, isolating the change to ensure easy rollback if necessary. Using Nix and DevOps practices, the update supports cross-server identity resolution and improves the accuracy of analytics, while also establishing a clear audit trail through a dedicated commit. The work laid the foundation for future identity-related features, emphasizing maintainability and compliance without impacting the stability of the production environment during the process.