Kido contributed targeted features to two game development projects over a two-month period, focusing on configuration management and character customization. In CombatExtended-Continued/CombatExtended, Kido delivered a data-driven balance adjustment for the Psychite Psycho item by updating XML configuration files, ensuring gameplay improvements with strong traceability and minimal risk to future iterations. Later, in ss14-harmony/ss14-harmony, Kido restored cat ears as a character customization option, integrating the feature seamlessly into the existing pipeline using YAML and XML. Both changes were implemented with clean, well-documented commits, demonstrating proficiency in configuration management and game development while maintaining overall project stability and clarity.