During November 2024, Ariel Levy focused on improving the stability of the epam/ketcher repository by addressing a critical issue in the deletion workflow. He identified and resolved a bug where sGroup attribute modifications were not properly ordered during deletion, which previously led to inconsistent application state. By refactoring the relevant TypeScript code, Ariel ensured that attribute changes are now applied as part of the deletion process, reducing the risk of edge-case failures. His work demonstrated strong debugging and code review skills, with careful validation to avoid regressions. The solution leveraged TypeScript development expertise and a methodical approach to refactoring.