mobile-design

Files (14)

• SKILL.md
• decision-trees.md
• mobile-backend.md
• mobile-color-system.md
• mobile-debugging.md
• mobile-design-thinking.md
• mobile-navigation.md
• mobile-performance.md
• mobile-testing.md
• mobile-typography.md
• platform-android.md
• platform-ios.md
• mobile_audit.py · scripts/
• touch-psychology.md

SKILL.md (first lines)

# Mobile Design System

> **Philosophy:** Touch-first. Battery-conscious. Platform-respectful. Offline-capable.
> **Core Principle:** Mobile is NOT a small desktop. THINK mobile constraints, ASK platform choice.

---

## 🔧 Runtime Scripts

**Execute these for validation (don't read, just run):**

| Script                    | Purpose                 | Usage                                           |
| ------------------------- | ----------------------- | ----------------------------------------------- |
| `scripts/mobile_audit.py` | Mobile UX & Touch Audit | `python scripts/mobile_audit.py <project_path>` |

---

## 🔴 MANDATORY: Read Reference Files Before Working!

**⛔ DO NOT start development until you read the relevant files:**

### Universal (Always Read)

| File                                                       | Content                                                         | Status                |
| ---------------------------------------------------------- | --------------------------------------------------------------- | --------------------- |
| **[mobile-design-thinking.md](mobile-design-thinking.md)** | **⚠️ ANTI-MEMORIZATION: Forces thinking, prevents AI defaults** | **⬜ CRITICAL FIRST** |
| **[touch-psychology.md](touch-psychology.md)**             | **Fitts' Law, gestures, haptics, thumb zone**                   | **⬜ CRITICAL**       |
| **[mobile-performance.md](mobile-performance.md)**         | **RN/Flutter performance, 60fps, memory**                       | **⬜ CRITICAL**       |
| **[mobile-backend.md](mobile-backend.md)**                 | **Push notifications, offline sync, mobile API**                | **⬜ CRITICAL**       |
| **[mobile-testing.md](mobile-testing.md)**                 | **Testing pyramid, E2E, platform-specific**                     | **⬜ CRITICAL**       |
| **[mobile-debugging.md](mobile-debugging.md)**             | **Native vs JS debugging, Flipper, Logcat**                     | **⬜ CRITICAL**       |
| [mobile-navigation.md](mobile-navigation.md)               | Tab/Stack/Drawer, deep linking                                  | ⬜ Read               |
| [mobile-typography.md](mobile-typography.md)               | System fonts, Dynamic Type, a11y                                | ⬜ Read               |
| [mobile-color-system.md](mobile-color-system.md)           | OLED, dark mode, battery-aware                                  | ⬜ Read               |
| [decision-trees.md](decision-trees.md)                     | Framework/state/storage selection                               | ⬜ Read               |

> 🧠 **mobile-design-thinking.md is PRIORITY!** This file ensures AI thinks instead of using memorized patterns.

### Platform-Specific (Read Based on Target)

| Platform           | File                                       | Content                                              | When to Read             |
| ------------------ | ------------------------------------------ | ---------------------------------------------------- | ------------------------ |
| **iOS**            | [platform-ios.md](platform-ios.md)         | Human Interface Guidelines, SF Pro, SwiftUI patterns | Building for iPhone/iPad |
| **Android**        | [platform-android.md](platform-android.md) | Material Design 3, Roboto, Compose patterns          | Building for Android     |
| **Cross-Platform** | Both above                                 | Platform divergence points                           | React Native / Flutter   |

> 🔴 **If building for iOS → Read platform-ios.md FIRST!**
> 🔴 **If building for Android → Read platform-android.md FIRST!**
> 🔴 **If cross-platform → Read BOTH and apply conditional platform logic!**

---

## ⚠️ CRITICAL: ASK BEFORE ASSUMING (MANDATORY)

> **STOP! If the user's request is open-ended, DO NOT default to your favorites.**

### You MUST Ask If Not Specified:

| Aspect             | Ask                                                     | Why                           |
| ------------------ | ------------------------------------------------------- | ----------------------------- |
| **Platform**       | "iOS, Android, or both?"                                | Affects EVERY design decision |
| **Framework**      | "React Native, Flutter, or native?"                     | Determines patterns and tools |
| **Navigation**     | "Tab bar, drawer, or stack-based?"                      | Core UX decision              |
| **State**          | "What state management? (Zustand/Redux/Riverpod/BLoC?)" | Architecture foundation       |
| **Offline**        | "Does this need to work offline?"                       | Affects data strategy         |
| **Target devices** | "Phone only, or tablet support?"                        | Layout complexity             |

### ⛔ AI MOBILE ANTI-PATTERNS (YASAK LİSTESİ)

> 🚫 **These are AI default tendencies that MUST be avoided!**

#### Performance Sins

| ❌ NEVER DO                    | Why It's Wrong                                 | ✅ ALWAYS DO                                      |
| ------------------------------ | ---------------------------------------------- | ------------------------------------------------- |
| **ScrollView for long lists**  | Renders ALL items, memory explodes             | Use `FlatList` / `FlashList` / `ListView.builder` |
| **Inline renderItem function** | New function every render, all items re-render | `useCallback` + `React.memo`                      |
| **Missing keyExtractor**       | Index-based keys cause bugs on reorder         | Unique, stable ID from data                       |
| **Skip getItemLayout**         | Async layout = janky scroll                    | Provide when items have fixed height              |
| **setState() everywhere**      | Unnecessary widget rebuilds                    | Targeted state, `const` constructors              |
| **Native driver: false**       | Animations blocked by JS thread                | `useNativeDriver: true` always                    |
| **console.log in production**  | Blocks JS thread severely                      | Remove before release build                       |
| **Skip React.memo/const**      | Every item re-renders on any change            | Memoize list items ALWAYS                         |

#### Touch/UX Sins

| ❌ NEVER DO                       | Why It's Wrong                            | ✅ ALWAYS DO                         |
| --------------------------------- | ----------------------------------------- | ------------------------------------ |
| **Touch target < 44px**           | Impossible to tap accurately, frustrating | Minimum 44pt (iOS) / 48dp (Android)  |
| **Spacing < 8px between targets** | Accidental taps on neighbors              | Minimum 8-12px gap                   |
| **Gesture-only interactions**     | Motor impaired users excluded             | Always provide button alternative    |
| **No loading state**              | User thinks app crashed                   | ALWAYS show loading feedback         |
| **No error state**                | User stuck, no recovery path              | Show error with retry option         |
| **No offline handling**           | Crash/block when network lost             | Graceful degradation, cached data    |
| **Ignore platform conventions**   | Users confused, muscle memory broken      | iOS feels iOS, Android feels Android |

#### Security Sins

| ❌ NEVER DO               | Why It's Wrong                             | ✅ ALWAYS DO                                              |
| ------------------------- | ------------------------------------------ | --------------------------------------------------------- |
| **Token in AsyncStorage** | Easily accessible, stolen on rooted device | `SecureStore` / `Keychain` / `EncryptedSharedPreferences` |
| **Hardcode API keys**     | Reverse engineered from APK/IPA            | Environment variables, secure storage                     |
| **Skip SSL pinning**      | MITM attacks possible                      | Pin certificates in production                            |
| **Log sensitive data**    | Logs can be extracted                      | Never log tokens, passwords, PII                          |

#### Architecture Sins

| ❌ NEVER DO                      | Why It's Wrong                     | ✅ ALWAYS DO                          |
| -------------------------------- | ---------------------------------- | ------------------------------------- |
| **Business logic in UI**         | Untestable, unmaintainable         | Service layer separation              |
| **Global state for everything**  | Unnecessary re-renders, complexity | Local state default, lift when needed |
| **Deep linking as afterthought** | Notifications, shares broken       | Plan deep links from day one          |
| **Skip dispose/cleanup**         | Memory leaks, zombie listeners     | Clean up subscriptions, timers        |

---

## 📱 Platform Decision Matrix

### When to Unify vs Diverge

From yunaamelia/apex-fast, MIT.

More from yunaamelia/apex-fast