win-back-offers

# Win-Back Offers Generator

Generate a complete win-back flow for recovering churned subscribers using StoreKit 2's win-back offer APIs (iOS 18+), Message API handling, and fallback promotional offers for older OS versions.

## When This Skill Activates

Use this skill when the user:
- Asks to "win back" or "re-engage" churned subscribers
- Mentions "lapsed subscribers" or "subscriber recovery"
- Wants to implement "win-back offers" (iOS 18+)
- Asks about "subscription churn" reduction
- Mentions "Message API" for subscription offers
- Wants to reduce subscriber attrition

## Minimum Eligibility

Win-back offers involve meaningful engineering and ASC configuration. Check these thresholds before proceeding:

| Churned Subscribers | Recommendation |
|----|---|
| **Under 50** | Not worth the setup effort. Use personal email outreach instead — write individual messages to churned users. Focus energy on preventing churn (improve onboarding, engagement). |
| **50-500** | Implement basic win-back via promotional offers (simpler than full win-back flow). Use offer codes distributed via email. |
| **500+** | Full win-back implementation justified. Native iOS 18+ win-back offers, Message API handling, automated pipeline. |

**If you don't know your churn numbers:** Check App Store Connect > Subscriptions > Retention metrics. If your total subscriber base is under 200, you likely don't have enough churn volume to justify this skill yet.

## Pre-Generation Checks

### 1. Project Context Detection
- [ ] Check for existing StoreKit implementation
- [ ] Check deployment target (iOS 18+ for native win-back, iOS 16+ for promotional offer fallback)
- [ ] Look for existing subscription management code
- [ ] Check if `subscription-offers` skill was already used
- [ ] **Check churn volume** — is the number of churned subscribers worth automating?

### 2. Conflict Detection
```
Glob: **/*WinBack*.swift, **/*Reengag*.swift
Grep: "winBackOffers" or "Message.messages" or "presentWinBackOffer"
```

## Configuration Questions

Ask user via AskUserQuestion:

1. **Win-back approach**
   - Native win-back offers only (iOS 18+ required)
   - Promotional offer fallback (supports iOS 16+)
   - Both (recommended)

2. **Message handling**
   - Handle App Store messages in-app (recommended)
   - Let system handle messages
   - Custom message presentation

3. **Analytics integration**
   - Basic (print logging)
   - Custom analytics protocol
   - Specific SDK (specify which)

## Generation Process

### Step 1: Read Templates
Read `templates.md` for all win-back implementation code.

### Step 2: Create Core Files

1. **WinBackOfferManager.swift** — Win-back offer detection, eligibility, and presentation
2. **WinBackMessageHandler.swift** — StoreKit Message API integration for in-app offer display
3. **WinBackEligibility.swift** — Churn detection and eligibility logic
4. **WinBackOfferView.swift** — Custom win-back offer presentation UI

### Step 3: Create Optional Files

5. **WinBackAnalytics.swift** — Track win-back funnel metrics
6. **WinBackFallback.swift** — Promotional offer fallback for iOS < 18

### Step 4: Determine File Location
```
- If Sources/Store/ exists → Sources/Store/WinBack/
- If Store/ exists → Store/WinBack/
- Otherwise → WinBack/
```

## Output Format

### Files Created
```
Store/WinBack/
├── WinBackOfferManager.swift      # Core win-back logic
├── WinBackMessageHandler.swift    # Message API handling
├── WinBackEligibility.swift       # Churn detection
├── WinBackOfferView.swift         # Custom offer UI
├── WinBackAnalytics.swift         # Funnel tracking (optional)
└── WinBackFallback.swift          # iOS < 18 fallback (optional)
```

### Integration Steps

**App Entry Point — Message Handling:**
```swift
@main
struct MyApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
                .storeMessagesTask { message in
                    // Handle win-back messages from App Store
                    await WinBackMessageHandler.shared.handle(message)
                }
        }
    }
}
```

**Check Win-Back Eligibility:**
```swift
let manager = WinBackOfferManager()
let winBackOffer = await manager.checkWinBackAvailability(
    productID: "com.app.subscription.monthly"
)

if let offer = winBackOffer {
    // Show win-back UI
    showWinBackSheet(offer: offer)
}
```

**Present Win-Back Offer:**
```swift
// Native (iOS 18+)
SubscriptionStoreView(groupID: groupID)
    .preferredSubscriptionOffer { product, subscription, offers in
        offers.first { $0.type == .winBack }
    }
```

### Testing Instructions

1. **Sandbox Account**: Create a subscriber, cancel, wait for expiry
2. **StoreKit Testing**: Use Transaction Manager to simulate churn
3. **Message Testing**: Test App Store message presentation
4. **Verify flow**: Churned → Offer shown → Purchase → Active subscriber

### App Store Connect Setup

1. Go to Subscriptions > Your Group > Win-Back Offers
2. Create offer with pricing and duration
3. Set eligibility criteria (days since churn, previous subscription duration)
4. Configure offer priority if multiple offers exist

## References

- **templates.md** — All production Swift templates
- Related: `generators/subscription-offers` — All offer types including win-back
- Related: `generators/paywall-generator` — Full paywall implementation
- Related: `app-store/marketing-strategy` — Win-back campaign planning