Ana Maria Nastase developed feature annotation support for the Deisotoper module in the OpenMS/OpenMS repository, focusing on improving traceability and downstream quality assurance in spectral data processing. She introduced an annotate_features parameter in C++, enabling the output to include feature indices for easier tracking and reproducibility. Her work involved integrating this new parameter into the existing codebase, demonstrating proficiency in C++ development and data processing. By enhancing the Deisotoper’s output, Ana Maria laid the groundwork for more robust feature tracking in spectral workflows. The implementation also considered Python bindings, supporting broader usability and aligning with software engineering best practices.