Worked on the harness/terraform-provider-harness repository to enhance both feature coverage and stability for cloud infrastructure automation. Delivered comprehensive end-to-end test automation for the Central Notification System, expanding validation across multiple notification channels and scopes using Go and Terraform. This approach improved release safety and accelerated feature rollouts by reinforcing test coverage for rules and templates. Subsequently, addressed backward compatibility in AWS Secrets Manager integration by reverting experimental KmsKeyId support, cleaning up schema and tests to restore prior behavior. Maintained provider stability and predictable secret management workflows, demonstrating careful version control and a focus on robust, maintainable infrastructure-as-code solutions.