During April 2026, this developer delivered OpenSearch 3.5 support for the aws/aws-cdk repository, focusing on aligning the AWS CDK with the latest OpenSearch Service release. The work involved updating enums and configuration files to enable seamless deployments with OpenSearch 3.5, as well as expanding both unit and integration test coverage to ensure stability and correctness. Using TypeScript and leveraging AWS CDK and cloud development expertise, the developer prepared the codebase for release by updating deployment configurations and documenting changes. No critical bugs were reported, as the primary emphasis was on robust feature delivery and comprehensive test validation.