Worked on the DataDog/terraform-provider-datadog repository to streamline the transition from the deprecated app_sec_spans datasource to the updated spans datasource. Focused on backend development and API design using Go, the developer implemented a formal deprecation process that included user-facing warnings and a clear migration path, ensuring a safer and more maintainable upgrade for customers. Testing artifacts and security monitoring rule tests were updated to reflect these changes, with regenerated cassettes supporting compatibility throughout the migration window. The work emphasized maintainable change management, branch stability, and traceability, delivering value through careful planning rather than direct bug fixes during this period.