This implements the core action-to-feedback loops that make games feel responsive, with concrete timing targets (sub-100ms input response, sub-50ms animation starts) and a full combat state machine handling attacks, blocking, and stagger states. The progression curve diagrams and resource economy formulas are actually useful for tuning, showing XP scaling rates and the 0.8-1.2 balance ratio for income versus spending. It's bonded to a game designer agent which makes sense since you'll be iterating on feel and balance constantly. The code examples are production-ready Unity implementations, not pseudocode, so you can drop them in and start tweaking damage values and cooldowns immediately. This is the mechanical foundation layer, not the content or narrative stuff.
npx skills add https://github.com/pluginagentmarketplace/custom-plugin-game-developer --skill gameplay-mechanics