Agent Skills: phaser-services

This skill should be used when wiring cross-cutting services and shared state in a Phaser 4 game — the typed registry wrapper for global state, a single dedicated EventsCenter bus (never game.events), the .on()/.off() listener discipline enforced in scene shutdown, SoundService (mobile audio unlock on first gesture), InputService (semantic actions instead of raw keys), and SaveService (versioned localStorage with a migration chain). Use it when adding global state, an event bus, audio/input/save plumbing, or fixing listener leaks and lost saves. Pairs with the official scenes skill, phaser-testing, and phaser-i18n.