During January 2026, Seigo contributed to the phuhung273/aws-cdk repository by adding support for Aurora PostgreSQL 14.20 in AWS CDK. This work involved introducing a new version constant, AuroraPostgresEngineVersion.VER_14_20, to ensure customers could deploy stacks using the latest engine version available in AWS RDS. Seigo implemented validation logic consistent with existing engine version checks, ensuring the new version appeared correctly in engine-version listings. The update was developed in TypeScript with a focus on cloud development best practices, maintaining code quality and documentation while minimizing changes to the codebase. No bugs were fixed during this period.