During October 2025, John worked on the OpenFUSIONToolkit/JPEC repository, focusing on stabilizing and refactoring the ODE output test suite. He updated the tests to reflect new output logic, ensuring that critical outputs are conditionally written and that the initialization of OdeState and DconOutput objects aligns with updated constructors. Using Julia, he emphasized bug fixing and testing, improving the reliability of the test infrastructure rather than adding new features. This work reduced the risk of regressions and improved validation confidence for downstream integrations, demonstrating a methodical approach to maintaining robust, maintainable code in a scientific computing context.