Worked on the mehah/otclient repository to address a critical issue in the inventory system, focusing on client-side logic and game development using C++. Delivered a targeted fix for container capacity handling, preventing item duplication when adding to full containers and correcting removal logic to avoid over-capacity scenarios. The solution involved updating the logic to remove the last item before inserting a new one and refining size decrement operations, thereby maintaining data integrity and supporting stable gameplay. Validated the changes with regression testing on inventory edge cases and provided in-repo documentation to guide future handling of inventory capacity issues.