During March 2025, John McMahan focused on improving refactor reliability in the INRIA/spoon repository by addressing a correctness issue in compilation unit type renaming. He analyzed and refactored Java code to ensure that all references within a compilation unit remained synchronized and that the main type was accurately identified after renaming. This fix prevents build and name resolution errors that can occur during large-scale code transformations, reducing the risk of post-refactor failures. Leveraging his skills in code analysis, Java development, and refactoring, John delivered a targeted solution that enhances the safety and reliability of automated codebase modifications.