Athiruma developed AWS Capacity Blocks support for the spectrocloud/cluster-api-provider-aws repository, focusing on enhancing cloud infrastructure provisioning. The work involved introducing a MarketType field to specify CapacityBlock and implementing validation logic to require a CapacityReservationID when this type is selected. Using Go and leveraging Kubernetes and Cluster API expertise, Athiruma ensured end-to-end handling and validation of capacity block instances within the AWS provider. This addition enables more granular control over AWS resource allocation, addressing specific business needs for capacity management. The feature was delivered as a cohesive update, reflecting a focused and technically sound approach to infrastructure automation.