During October 2025, Nicolas F. Aguirre enhanced trajectory I/O reliability in the SCM-NV/PLAMS repository by implementing SCM-style support for the XYZTrajectoryFile component. He developed a comprehensive Python-based test suite that validates round-trip reading and writing of trajectory data, ensuring consistent formatting and early regression detection. His approach included creating new test fixtures and methods that assert output correctness against expected results, with a focus on file I/O and trajectory analysis. By documenting test behavior and expectations, Nicolas improved code maintainability and user confidence in trajectory processing, demonstrating depth in testing practices and attention to quality assurance within the project.