Garry O’Donnell focused on improving deployment reliability for the DiamondLightSource/workflows repository by addressing a critical bug in the Sessionspaces Helm chart. He resolved variable scoping issues by adopting fully qualified contexts and updating variable references with the appropriate syntax, which eliminated conflicts during deployment. This work involved careful modification of YAML templates and a version bump to reflect the fix, ensuring traceability and clarity in the project’s history. By validating the changes across multiple Kubernetes environments, Garry reduced failed deployments related to chart variables. His contributions demonstrated a strong grasp of Helm, Kubernetes, and YAML in a targeted engineering context.