During June 2025, pbone focused on improving code documentation within the mozilla/gecko-dev repository, specifically addressing mutex ownership semantics in the PHC.cpp file. By clarifying that sPHC::mMutex, rather than GMUt::mMutex, is expected to be locked, pbone resolved a documentation bug that could have led to misinterpretation during code reviews or onboarding. This targeted update, implemented in C++ and leveraging strong code documentation skills, enhanced the maintainability and accuracy of the codebase. The work demonstrated careful attention to detail and a commitment to reducing future confusion, ultimately supporting more reliable development and easier long-term maintenance for the project.