Worked on expanding achievement criteria within the zarillion/handynotes-plugins repository, specifically enhancing The Underkeep Stories achievement by introducing a Third Party Operation condition to broaden completion requirements. This update was implemented using Lua scripting and game development techniques, ensuring that existing progress tracking remained unaffected while enabling more scalable achievement logic. The change was carefully integrated to maintain clear traceability through linked pull requests and issues, supporting ongoing changelog accuracy. By focusing on a targeted feature addition rather than broad changes or bug fixes, the work laid a foundation for future extensibility and encouraged higher user engagement within the plugin’s gamification system.