Add Feature

This is your go-to for adding actual gameplay mechanics to browser games built with Three.js or Phaser. It walks through the codebase architecture first (EventBus, GameState, Constants), plans the feature in plain English, then implements it following the existing patterns. The enforcement is strict: no hardcoded values, all communication through events, proper wiring into the game loop. Works well for things like double-jump, power-ups, or combo systems. The step-by-step verification catches the usual mistakes like event name collisions or broken cleanup. It's methodical by design, which means slower but you won't end up refactoring everything when you add the third feature.