Worked on security hardening and configuration hygiene for the traPtitech/manifest repository, focusing on reducing deployment risk and improving access control. Delivered a targeted update that removed hard-coded references to a specific user from deployment configuration files, streamlining operator lists and minimizing the potential for misconfiguration. The approach emphasized disciplined change management, with all modifications reviewed and validated through continuous integration to ensure no regressions. Leveraged skills in configuration management, DevOps, and Kubernetes, using YAML to implement the changes. The result was a more secure and maintainable deployment process, with improved clarity and reduced operational complexity for deployment operators.