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SKILL: Mobile Development

Version: 2.0.0 | Updated: 2025-01

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name: mobile-development description: iOS (Swift, SwiftUI), Android (Kotlin, Compose), cross-platform (Flutter, React Native), and game development (Unity, Unreal).

ACTIVATION TRIGGERS

triggers:

• ios
• android
• flutter
• react native
• mobile
• swift
• kotlin
• unity
• game development

SKILL PARAMETERS

parameters: platform: type: string enum: [ios, android, cross-platform, games] required: true project_type: type: string required: false description: Type of app (social, productivity, game, etc.)

OUTPUT SPECIFICATION

outputs: recommended_stack: type: object learning_path: type: array portfolio_projects: type: array

RELIABILITY

retry: max_attempts: 3 backoff: exponential

OBSERVABILITY

observability: log_level: info

level: advanced prerequisites:

• core-development

sasmp_version: "1.3.0" bonded_agent: 01-core-paths bond_type: PRIMARY_BOND

Mobile Development Skill

Quick Reference

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Learning Paths

iOS Development

Copy[1] Swift Fundamentals (4-6 wk)
 │  └─ Types, optionals, closures, protocols
 │
 ▼
[2] SwiftUI (4-6 wk)
 │  └─ Views, modifiers, state, binding
 │
 ▼
[3] Navigation + Data (3-4 wk)
 │  └─ NavigationStack, SwiftData/Core Data
 │
 ▼
[4] Networking + Async (2-3 wk)
 │  └─ URLSession, async/await, Combine
 │
 ▼
[5] Testing + App Store (2 wk)
    └─ XCTest, TestFlight, submission

2025 Stack: Swift 5.10 + SwiftUI + SwiftData + Xcode 16

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Android Development

Copy[1] Kotlin Fundamentals (4-6 wk)
 │  └─ Null safety, coroutines, data classes
 │
 ▼
[2] Jetpack Compose (4-6 wk)
 │  └─ Composables, state, effects
 │
 ▼
[3] Architecture (3-4 wk)
 │  └─ MVVM, Room, Navigation
 │
 ▼
[4] Networking + DI (2-3 wk)
 │  └─ Retrofit, Hilt, Flow
 │
 ▼
[5] Testing + Play Store (2 wk)
    └─ JUnit, Espresso, release

2025 Stack: Kotlin 2.0 + Jetpack Compose + Room + Hilt

---

Flutter (Cross-Platform)

Copy[1] Dart Fundamentals (2-3 wk)
 │
 ▼
[2] Flutter Widgets (3-4 wk)
 │
 ▼
[3] State Management (2-3 wk)
 │  └─ Riverpod or Bloc
 │
 ▼
[4] Backend Integration (2 wk)
 │  └─ Firebase, REST APIs
 │
 ▼
[5] Deploy to Both Stores (1 wk)

2025 Stack: Flutter 3.x + Dart 3.x + Riverpod + Firebase

---

Game Development

Copy[1] Game Basics (4-6 wk)
 │  └─ Game loop, input handling
 │
 ▼
[2] Unity/C# Fundamentals (6-8 wk)
 │  └─ GameObjects, Components, Scripts
 │
 ▼
[3] Physics + Graphics (4-6 wk)
 │  └─ Rigidbody, colliders, shaders
 │
 ▼
[4] Audio + Polish (2-4 wk)
 │
 ▼
[5] Publish (ongoing)
    └─ Steam, App Store, Play Store

2025 Stack: Unity 6 LTS + C# OR Unreal 5.4 + C++

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Platform Decision Tree

CopyWhich platform?
│
├─► Apple ecosystem only?
│   └─► iOS (Swift + SwiftUI)
│
├─► Android ecosystem only?
│   └─► Android (Kotlin + Compose)
│
├─► Both platforms?
│   ├─► Performance-critical? → Native for both
│   ├─► Budget/time limited? → Flutter
│   └─► Web developer background? → React Native
│
└─► Making games?
    ├─► 2D/3D indie → Unity
    ├─► AAA quality → Unreal
    └─► Simple 2D → Godot

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Game Engine Comparison

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Troubleshooting

CopyNative vs Cross-platform?
├─► Need platform-specific APIs (HealthKit, ARCore)? → Native
├─► Performance-critical (AR/VR, complex animations)? → Native
├─► Budget or time limited? → Flutter
├─► Team knows JavaScript? → React Native
└─► Starting from scratch? → Flutter (best DX)

Simulator works, device doesn't?
├─► Missing entitlements/capabilities?
├─► Different iOS/Android version?
├─► Network connectivity issues?
└─► Always test on real devices from day 1

App rejected by store?
├─► Read rejection reason carefully
├─► Check App Store Review Guidelines
├─► Most common: metadata issues, crashes, spam
└─► Appeal if unjustified

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Common Failure Modes

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Portfolio Projects

Mobile (Progressive)

1. Todo App - CRUD basics
2. Weather App - API integration
3. Chat App - Real-time, auth
4. Payment App - Stripe, security

Games

1. 2D Platformer - Physics basics
2. 3D Runner - 3D graphics, particles
3. Multiplayer Game - Networking

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Next Actions

Specify your target platform for a detailed learning plan.