Contributed targeted updates to the foundryvtt/pf2e repository, focusing on backend enhancements for game development workflows. Delivered a bug fix that corrected the Light Mortar Innovation benefit calculation, ensuring accurate proficiency levels for the inventor class. Introduced a Weapon Capacity Alteration Handler within the item alteration system, enabling safe addition, downgrade, or override of weapon capacity values with validation for ammo-capacity weapons. Emphasized maintainability through traceable, well-documented commits and collaborative development practices. Utilized TypeScript and JSON manipulation to improve reliability and configuration safety, reducing misconfigurations and support overhead while enhancing the accuracy of proficiency calculations and weapon configuration edits.