Antonin enhanced the DataDog/terraform-provider-datadog repository by delivering a feature that enables deletion of test steps for browser and mobile Datadog Synthetics tests. Using Go and Terraform, Antonin ensured the steps payload is always transmitted, even when empty, to guarantee accurate application of test configurations. This approach reduces the risk of misconfiguration and improves the reliability of automated testing within CI pipelines. Antonin also updated related test cassettes to reflect these changes, demonstrating attention to integration details. The work focused on robust API integration and careful management of test state, providing depth in both implementation and validation processes.