Neeraj Attri focused on enhancing code readability and maintainability in the manoj07hbti/demo-project-corejava repository during June 2025. He refactored CalculatorApp.java, standardizing variable declarations and improving spacing to align with Java coding standards. His work included correcting minor grammatical issues in comments, which brought project documentation in line with established guidelines. By emphasizing code consistency and clarity, Neeraj established a stronger foundation for future development and smoother onboarding of new contributors. Although he did not address bug fixes, his efforts in Core Java improved the overall quality gates of the codebase, supporting faster code reviews and easier future refactoring.