During a one-month engagement, Mridul enhanced the econ-ark/HARK repository by focusing on continuous integration and test reliability. He implemented parallelized pytest execution with coverage reporting, leveraging Python and YAML to improve feedback speed and test coverage visibility. Additionally, he streamlined the GitHub Actions workflow by removing the pull_request trigger, allowing CI runs to be scheduled or manually dispatched, which reduced workflow complexity and improved maintainability. Mridul’s work centered on CI/CD best practices and automated testing, delivering two targeted features that addressed bottlenecks in test execution and workflow management, though the scope did not include bug fixes during this period.