Sowmya Kelam enhanced the IBM/platform-services-go-sdk by extending the InstanceUsage API to include subscription_id, created_at, and deleted_at fields in its response, enabling more granular tracking of subscription lifecycles. She approached this feature with disciplined API design and clear, versioned commit practices, ensuring maintainability and clarity in the codebase. Working primarily in Go, she focused on backend and API development, improving the reliability of usage reporting and lifecycle analytics for service subscriptions. While the scope was focused to a single feature over the month, the work demonstrated depth in Go SDK development and attention to data accuracy for platform services.