<task-notification>
<task-id>a6e1d13</task-id>
<status>completed</status>
<summary>Agent "Fix PHPStan errors in Services" completed</summary>
<result>All PHPStan errors in `app/Services/` are resolved. Here is a summary of all changes made:

---

## Summary of Changes

### Root Cause: Model `@property` Annotations

The primary root cause of many errors was that Larastan v3.9.2 could not properly infer cast types from the `casts()` method alone. The `@return array<string, string>` PHPDoc on `casts()` methods was actively misleading PHPStan into thinking all model attributes were plain strings, causing false positives for enum comparisons, array casts, and integer casts.

### Model Changes (enabling proper type inference)

The following models had their `@return array<string, string>` PHPDoc removed from `casts()` and received `@property` annotations for typed/cast attributes:

1. **`/Users/fabianwesner/Herd/shop/app/Models/Order.php`** -- Added `@property` for `OrderStatus`, `FinancialStatus`, `FulfillmentStatus`, `PaymentMethod`, array casts, datetime, and integer fields.

2. **`/Users/fabianwesner/Herd/shop/app/Models/Checkout.php`** -- Added `@property` for `CheckoutStatus` and array-cast JSON fields.

3. **`/Users/fabianwesner/Herd/shop/app/Models/Cart.php`** -- Added `@property` for `CartStatus` and `cart_version` integer.

4. **`/Users/fabianwesner/Herd/shop/app/Models/ProductVariant.php`** -- Added `@property` for `VariantStatus`, booleans, and integer fields.

5. **`/Users/fabianwesner/Herd/shop/app/Models/Discount.php`** -- Added `@property` for `DiscountStatus`, `DiscountType`, `DiscountValueType`, datetime, integer, and array fields.

6. **`/Users/fabianwesner/Herd/shop/app/Models/ShippingRate.php`** -- Added `@property` for `ShippingRateType`, array JSON, and boolean.

7. **`/Users/fabianwesner/Herd/shop/app/Models/NavigationItem.php`** -- Added `@property` for `NavigationItemType`.

8. **`/Users/fabianwesner/Herd/shop/app/Models/TaxSettings.php`** -- Added `@property` for `TaxMode`, boolean, and array JSON.

9. **`/Users/fabianwesner/Herd/shop/app/Models/InventoryItem.php`** -- Added `@property` for `InventoryPolicy` and integer fields.

10. **`/Users/fabianwesner/Herd/shop/app/Models/Product.php`** -- Added `@property` for `ProductStatus`, array tags, and datetime.

11. **`/Users/fabianwesner/Herd/shop/app/Models/Payment.php`** -- Added `@property` for `PaymentStatus`, `PaymentMethod`, and amount integer.

12. **`/Users/fabianwesner/Herd/shop/app/Models/Fulfillment.php`** -- Added `@property` for `FulfillmentShipmentStatus` and datetime.

13. **`/Users/fabianwesner/Herd/shop/app/Models/CartLine.php`** -- Added `@property` for all integer fields.

14. **`/Users/fabianwesner/Herd/shop/app/Models/OrderLine.php`** -- Added `@property` for integer and array fields.

15. **`/Users/fabianwesner/Herd/shop/app/Models/FulfillmentLine.php`** -- Added `@property` for quantity integer.

16. **`/Users/fabianwesner/Herd/shop/app/Models/ShippingZone.php`** -- Added `@property` for array JSON fields.

### Service File Changes

1. **`/Users/fabianwesner/Herd/shop/app/Services/CheckoutService.php`**
   - Added `Store` import and `/** @var Store $store */` with `firstOrFail()` instead of `first()` for store lookups
   - Added `/** @var Checkout */` annotations before `fresh()` calls to assert non-null returns
   - Added `/** @var Cart $cart */` annotations before accessing cart properties from nullable relationship
   - Used `(string) $checkout->payment_method` to handle the nullable string being passed to `PaymentMethod::from()`
   - Changed `$line->variant->inventoryItem` to `$line->variant?->inventoryItem` for null-safe access
   - Added `/** @var array{country_code?: string, province_code?: string} $address */` for shipping address type

2. **`/Users/fabianwesner/Herd/shop/app/Services/ShippingCalculator.php`**
   - Added `/** @var Collection<int, ShippingRate> */` annotations on empty `collect()` returns
   - Added `/** @var array<string, mixed> $config */` for config_json access
   - Added `/** @var int $amount */` and `/** @var int $defaultAmount */` for mixed-to-int conversions from config arrays
   - Added `/** @var array<int, array{...}> $ranges */` type annotations for range arrays from config

3. **`/Users/fabianwesner/Herd/shop/app/Services/OrderService.php`**
   - Added `Cart` and `ProductVariant` imports
   - Added `/** @var Cart $cart */` annotation for nullable cart relationship
   - Added `/** @var array{subtotal?: int, ...} $totals */` for totals_json array shape
   - Added `/** @var ProductVariant $variant */` for nullable variant in line iteration
   - Used `(string) $checkout->payment_method` for nullable string to PaymentMethod::from()
   - Changed `$product?->title ??` to `$product->title ??` where nullsafe was unnecessary

4. **`/Users/fabianwesner/Herd/shop/app/Services/InventoryService.php`**
   - Changed all `find($item->id)` calls to `findOrFail($item->id)` to ensure non-null return
   - Added `/** @var InventoryItem $item */` annotations before the re-fetched items

5. **`/Users/fabianwesner/Herd/shop/app/Services/CartService.php`**
   - Used `$variant->product?->status` for nullable product relationship
   - Added `/** @var CartLine */` and `/** @var Cart */` annotations before `fresh()` calls

6. **`/Users/fabianwesner/Herd/shop/app/Services/ProductService.php`**
   - Added `/** @var string $title */` for mixed array access used in HandleGenerator
   - Added `/** @var array<int, array<string, mixed>> */` annotations for options/variants data
   - Added `/** @var Product */` before `fresh()` return
   - Removed unnecessary `?? []` on `$allowedTransitions` lookup (PHPStan knows all keys exist)
   - Added `/** @var array<int, string> $optionValues */` for foreach on mixed

7. **`/Users/fabianwesner/Herd/shop/app/Services/PricingEngine.php`**
   - Added `Cart` and `Store` imports
   - Added `/** @var Cart $cart */` and `/** @var Store|null $store */` for nullable relationships
   - Added `/** @var array{default_rate?: int} $config */` for config_json access

8. **`/Users/fabianwesner/Herd/shop/app/Services/TaxCalculator.php`**
   - Added `/** @var array{default_rate?: int} $config */` for config_json array shape
   - Removed unnecessary `(int)` cast

9. **`/Users/fabianwesner/Herd/shop/app/Services/NavigationService.php`**
   - Added `/** @var array<int, array{...}> */` annotation on Cache::remember return
   - Converted arrow function to regular closure in `map()` for better type inference

10. **`/Users/fabianwesner/Herd/shop/app/Services/AnalyticsService.php`**
    - Added `@return Collection<int, AnalyticsDaily>` generic type annotation

11. **`/Users/fabianwesner/Herd/shop/app/Services/SearchService.php`**
    - Added `@return LengthAwarePaginator<int, Product>` generic type annotation
    - Added `@return Collection<int, string>` and inline `/** @var Collection<int, string> */` annotations for autocomplete

12. **`/Users/fabianwesner/Herd/shop/app/Services/VariantMatrixService.php`**
    - Added `/** @var array<int, array<int, int>> $valueSets */` for cartesian parameter type

### Results
- **Before**: 143 PHPStan errors
- **After**: 0 PHPStan errors
- **Tests**: All 335 tests pass (730 assertions)
- **Pint**: All formatting passes</result>
<usage>total_tokens: 124141
tool_uses: 151
duration_ms: 741766</usage>
</task-notification>
Full transcript available at: /private/tmp/claude-501/-Users-fabianwesner-Herd-shop/tasks/a6e1d13.output