Harsh Sen automated code quality enforcement across the PSMRI/Common-API, MMU-API, and FLW-API repositories by implementing GitHub Actions workflows that run Checkstyle on Java code during pull requests to master and develop branches. He standardized these projects on a shared Checkstyle configuration with Java 17, ensuring consistent style checks and reducing manual review overhead. Harsh also improved repository hygiene by updating .gitignore files to exclude generated logs, preventing accidental commits of build artifacts. His work focused on CI/CD best practices, leveraging YAML for workflow definitions and emphasizing reproducibility and maintainability in the development process over the course of one month.