Games

Skills for building games and interactive 3D experiences on Apple platforms using SpriteKit, SceneKit, and RealityKit.

Available Skills

SpriteKit

Complete guide to building 2D games with SpriteKit. Covers the scene graph model, physics engine (bitmask discipline, contact detection, body types), action system, game loop, performance optimization, and SwiftUI/Metal integration.

• SpriteKit – Architecture, patterns, anti-patterns, and code review checklist

Game Input

Player input for games: on-screen touch controls with the TouchController framework (iOS/iPadOS), unified game controller handling through GCController, and the GameController additions new in the 27 releases (controller Home button settings, visionOS spatial accessories).

• Game Input – Touch controller setup, control catalog, adaptive layouts, interaction patterns, controller additions

SceneKit

3D scene graph framework for rendering, animations, and physics:

• SceneKit – Scene graphs, materials, animations, SceneKit → RealityKit migration
• SceneKit API – Complete SceneKit API reference and concept mapping

RealityKit

Entity-Component-System framework for AR and 3D content:

• RealityKit – ECS architecture, entity-component patterns, RealityView
• RealityKit API – Entity, Component, System, materials, animations
• RealityKit Diagnostics – Entity loading failures, physics issues, rendering problems

Metal Migration

Porting OpenGL/DirectX rendering to Metal:

• Metal Migration – Migration patterns, shader conversion, rendering pipeline
• Metal Migration API – Shader translation, pipeline state objects
• Metal Migration Diagnostics – Shader compilation, rendering artifacts

USDKit

Working with USD/USDZ 3D scene files in Swift (new in the 27 releases): opening and traversing stages, editing prims and attributes, exporting compressed USDZ packages, and rendering stages directly in RealityKit.

• USDKit – Stages, traversal, editing, AccessibilityAPI schema, compressed export, USDStageComponent

Available Agents

• spritekit-auditor – Scans SpriteKit code for physics bitmask issues, draw call waste, node accumulation, and action memory leaks

Available References

• SpriteKit API – All 16 node types, physics body creation, complete action catalog, texture atlases, constraints, particles, SKRenderer

Available Diagnostics

• SpriteKit Diagnostics – Decision trees for contacts not firing, tunneling, frame drops, touch bugs, memory spikes, coordinate confusion, transition crashes

Example Prompts

• "I'm building a SpriteKit game"
• "My physics contacts aren't firing"
• "Frame rate is dropping in my game"
• "I'm porting my game to iPhone — how do I add touch controls?"
• "How do I handle game controller input?"
• "How do I set up SpriteKit with SwiftUI?"
• "Objects pass through walls in my game"
• "Audit my SpriteKit code for issues"
• "How do I migrate from SceneKit to RealityKit?"
• "My RealityKit entities aren't loading"
• "I need to port my OpenGL renderer to Metal"