Worked on the SegmentLinking/cmssw repository, focusing on improving system stability and correctness rather than adding new features. Addressed a critical initialization bug by ensuring the updateLookup function in the EventSetup path was invoked only after ESProducer constructions and sharing checks were completed. This adjustment prevented premature updates to lookup tables, reducing the risk of runtime inconsistencies during startup and construction phases. Emphasized maintainability and reliability throughout the process, aligning with project goals for robust, deploy-safe releases. Utilized C++ and software engineering best practices to enhance code quality, supporting a stable foundation for future development and deployment activities.