Output:
Chunk ID: 4c90a3
Wall time: 0.0506 seconds
Process exited with code 0
Original token count: 2349
Output:
# 04 - Storefront UI/UX Specification

> E-commerce platform - Customer-facing storefront UI/UX requirements

---

## Conventions

| Convention | Detail |
|---|---|
| CSS Framework | Tailwind CSS v4, mobile-first design, dark mode support |
| Interactivity | Livewire v4 for all dynamic UI (cart, filters, checkout) |
| Templating | Blade templates with reusable storefront-prefixed components |
| Accessibility | WCAG 2.2 AA compliance throughout |
| Responsive | Mobile-first with progressive enhancement at small, medium, large, and extra-large breakpoints |
| Currency | All prices stored as integers (cents), formatted with locale-aware helpers |
| Images | Lazy-loaded, with proper alt text and maintained aspect ratios |

---

## Currency Formatting

All monetary amounts are stored as integers in minor units (cents) and must be formatted for display according to these rules:

| Setting | Value |
|---------|-------|
| Decimal separator | `.` (period) |
| Thousands separator | `,` (comma) |
| Currency symbol | After amount with space (e.g., `24.99 EUR`) |
| Decimal places | Always 2 |
| Free amounts | Display as `0.00 EUR` |
| Negative amounts (refunds) | Prefix with `-` (e.g., `-12.50 EUR`) |

**Helper:** Use a shared Blade component or helper (e.g., `<x-price :amount="$amount" :currency="$currency" />`) to ensure consistent formatting across all storefront pages.

**Examples:**
- 2499 cents -> `24.99 EUR`
- 0 cents -> `0.00 EUR`
- 149900 cents -> `1,499.00 EUR`

---

## 1. Theme System Architecture

### 1.1 View Organization

The storefront views are organized into the following categories:

| Category | Purpose | Views |
|---|---|---|
| Layouts | Master page shell | app (master layout) |
| Pages | Core storefront pages | home, collection, product, cart, search, page (static CMS) |
| Checkout | Purchase flow | checkout index, order confirmation |
| Account | Customer area | login, register, dashboard, orders (list + detail), addresses |
| Errors | Error states | 404, 503 |
| Components | Reusable UI elements | product-card, price, badge, quantity-selector, address-form, order-summary, breadcrumbs, pagination |

### 1.2 Layout Hierarchy

All storefront pages extend a single master layout, which provides the full page shell including header, footer, cart drawer, and global Livewire listeners. Individual page templates fill the main content section.

### 1.3 Theme Settings

Theme settings are stored in the database as JSON (keyed by theme ID). A singleton service loads and caches the active theme settings for the current store. Settings control:

- Announcement bar visibility, text, link, and background color
- Sticky header toggle
- Home page section order and visibility
- Color palette overrides (primary, secondary, accent)
- Typography scale
- Footer content and social links
- Dark mode behavior (system preference, toggle, or forced)

### 1.4 Section-Based Architecture

Each page is composed of configurable sections. Sections are Blade includes or Livewire components receiving configuration from theme settings.

| Section | Description | Used On |
|---|---|---|
| Hero | Full-width banner with heading, subheading, call-to-action | Home |
| Featured Collections | Grid of collection cards | Home |
| Featured Products | Grid of product cards (lazy-loaded) | Home |
| Newsletter | Email signup form | Home, Footer |
| Rich Text | Customizable content block | Home, Pages |

### 1.5 Blade Components

All reusable UI elements are implemented as Blade components with a storefront prefix. See Section 16 for the full component library reference.

---

## 2. Base Layout

### 2.1 Document Head

The document head includes:

| Element | Description |
|---|---|
| Character encoding | UTF-8 |
| Viewport | Width = device width, initial scale 1 |
| Meta description | Page-specific, yielded from child templates |
| Title | Page-specific title appended with the app name |
| Stylesheets | Compiled CSS via Vite |
| Scripts | Compiled JS via Vite |
| Livewire styles | Injected by Livewire |
| Language attribute | Set on the HTML element from application locale |
| Scroll behavior | Smooth scrolling enabled globally |

### 2.2 Skip Link

A visually hidden "Skip to main content" link is the first element in the body. It becomes visible on keyboard focus, positioned fixed at top-left with a clear visual treatment (solid background, shadow, focus ring). Supports dark mode.

**Accessibility:** Allows keyboard users to bypass the header navigation and jump directly to the main content area.

### 2.3 Announcement Bar

Optional, controlled by theme settings. Renders a full-width bar above the header.

| Attribute | Description |
|---|---|
| Position | Full-width, above the header |
| Background | Configurable color, defaults to dark background (light text) / inverted in dark mode |
| Text | Centered, small size, configurable content |
| Link | Optional, underlined, opens in same tab |
| Dismiss | Close button (X icon) on the right side; dismissal persisted via localStorage |
| Height | Auto height with vertical padding |

### 2.4 Header

The header serves as the primary navigation banner.

**Desktop Layout (large breakpoint and above):**

```
+--------------------------------------------------------------+
| [Logo]      [Nav Item] [Nav Item] [Nav Item]     [S] [C] [A] |
+--------------------------------------------------------------+
```

| Element | Position | Description |
|---|---|---|
| Logo | Left | Linked to home page. Shows image if logo URL is set in theme settings, otherwise store name as text. Max height approximately 40px on desktop, 32px on smaller screens |
| Main Navigation | Center | Horizontal nav with links sourced from the "main-menu" navigation menu. Supports one level of dropdown submenus (revealed on hover/focus) |
| Search Icon | Right group | Button that opens the search modal |
| Cart Icon | Right group | Button that opens the cart drawer. Displays item count badge (small circular indicator, primary color background, white text) |
| Account Icon | Right group | Link to account dashboard (logged in) or login page (guest) |

**Mobile Layout (below large breakpoint):**

```
+--------------------------------------------------------------+
| [Hamburger]           [Logo]                            [Cart]|
+--------------------------------------------------------------+
```

| Element | Position | Description |
|---|---|---|
| Hamburger menu | Left | Toggle button for mobile navigation drawer |
| Logo | Center | Same as desktop but horizontally centered |
| Cart icon | Right | Same as desktop |

**Sticky Header (optional):**

When enabled in theme settings, the header sticks to the top of the viewport with a semi-transparent background and backdrop blur. A subtle bottom border appears on scroll.

**Mobile Navigation Drawer:**

| Attribute | Description |
|---|---|
| Animation | Slides in from the left side |
| Height | Full viewport height |
| Backdrop | Semi-transparent dark overlay behind the drawer |
| Close button | X icon at the top-right of the drawer |
| Navigation items | Vertical stack with comfortable tap targets |
| Submenus | Collapsible accordion pattern with chevron icons |
| Account link | Positioned at the bottom of the navigation list |
| Focus behavior | Focus is trapped within the drawer while open |
| ARIA | Labeled as "Mobile navigation" |

### 2.5 Main Content Area

The main content area is a landmark element with a unique ID for skip-link targeting. It occupies at least the full viewport height.

### 2.6 Footer

The footer is a content-info landmark.

**Layout:**

```
+--------------------------------------------------------------+
| [Column 1: Links]  [Column 2: Links]  [Column 3: Store Info] |
|                                                               |
| [Social Icons]                                                |
| [Copyright] [Payment Icons]                                   |
+--------------------------------------------------------------+
```

| Element | Description |
|---|---|
| Link columns | Responsive grid: 2 columns on mobile, 3 on tablet, up to 4 on desktop. Links sourced from "footer-menu" navigation menu. Each column has an uppercase heading and a list of links |
| Store info column | Store name, address (if configured), contact email |
| Social links | Row of icon links (Facebook, Instagram, Twitter/X, TikTok, YouTube) configured in theme settings. Each with screen reader label. Icons are 20x20, muted color with hover to full contrast |
| Copyright line | Small muted text: "(c) {year} {store name}. All rights reserved." |
| Payment method icons | Row of SVG icons for accepted payment methods (Visa, Mastercard, Amex, PayPal, etc.). Slightly reduced opacity |
| Spacing | Generous vertical padding, content constrained to max-width container with horizontal padding |
| Background | Light gray (dark: very dark gray), top border separator |

### 2.7 Cart Drawer (Livewire)

The cart drawer is always present in the layout as a global Livewire component. It listens for the "cart-updated" browser event to refresh and open. See Section 6 for full specification.

### 2.8 Dark Mode

Dark mode is implemented via Tailwind's dark variant. The behavior is controlled by theme settings:

| Mode | Implementation |
|---|---|
| System preference (default) | Follows OS-level dark mode preference automatically |


Output:
Chunk ID: d77961
Wall time: 0.0506 seconds
Process exited with code 0
Original token count: 2305
Output:
# 05 - Business Logic Specification

> E-commerce platform - All domain logic, state machines, calculations, and rules for Laravel 12

---

## Conventions

| Convention | Detail |
|---|---|
| Monetary amounts | **INTEGER in minor units** (cents). All arithmetic uses integers - never floating point. |
| Percentage storage | Basis points where noted (e.g., 1900 = 19.00%) or whole-number percentage in `discounts.value_amount` (e.g., 15 = 15%) |
| Rounding | Round each line independently, then sum (prevents rounding drift) |
| Database | SQLite - single-writer, WAL mode, no advisory locks needed |
| Time | All timestamps in ISO-8601 UTC via Laravel `created_at` / `updated_at` |
| Currency | Single currency per store (`stores.default_currency`). No multi-currency conversion. |

---

## 1. Multi-Tenancy and Store Isolation

### 1.1 Tenant Resolution Middleware

**Class:** `App\Http\Middleware\ResolveStore`

**Register** in `bootstrap/app.php` under both the `storefront` and `admin` middleware groups.

#### Storefront Route Resolution (from request hostname)

1. Extract hostname from the incoming HTTP request.
2. Look up `store_domains` table where `hostname` matches.
3. Cache the hostname-to-store_id mapping using file cache with a 5-minute TTL. Cache key pattern: `store_domain:{hostname}`.
4. Retrieve the full Store model and bind it as a singleton in the application container under the key `current_store`.
5. If hostname is not found in `store_domains`: return HTTP 404.
6. If the resolved store has `status = 'suspended'`: return HTTP 503 maintenance page.

#### Admin Route Resolution (from session)

1. Read the selected store ID from the authenticated user's session (key: `current_store_id`).
2. Verify the authenticated user has a `store_users` record for that store.
3. If the store is suspended: return HTTP 403 Forbidden. Admin users can still view settings but cannot perform storefront-affecting mutations.

```mermaid
flowchart TD
    A[Incoming Request] --> B{Route type?}
    B -->|Storefront| C[Extract hostname]
    C --> D{Hostname in cache?}
    D -->|Yes| E[Load store from cache]
    D -->|No| F[Query store_domains table]
    F --> G{Found?}
    G -->|No| H[Return 404]
    G -->|Yes| I[Cache hostname->store_id, 5 min TTL]
    I --> E
    E --> J{Store suspended?}
    J -->|Yes| K[Return 503 maintenance]
    J -->|No| L[Bind store as singleton, continue]

    B -->|Admin| M[Read store_id from session]
    M --> N{User has store_users record?}
    N -->|No| O[Return 403]
    N -->|Yes| P{Store suspended?}
    P -->|Yes| Q[Return 403 for mutations]
    P -->|No| L
```

### 1.2 Store Scoping

**Trait:** `App\Models\Concerns\BelongsToStore`
**Global Scope:** `App\Models\Scopes\StoreScope`

The trait applies a global query scope to every model that uses it. The scope adds a `WHERE store_id = <current_store_id>` clause to all queries automatically.

**Behavior:**

- On the model's `creating` event, automatically set `store_id` from the current store context (defense-in-depth).
- All SELECT, UPDATE, DELETE queries on tenant-scoped models include the store filter.
- In platform-admin contexts where cross-store access is needed, the scope can be temporarily removed.

**Models that must use this trait:**
products, collections, customers, orders, carts, checkouts, discounts, shipping_zones, themes, pages, navigation_menus, analytics_events, analytics_daily, webhook_subscriptions, inventory_items, search_queries.

### 1.3 Role-Based Access Control

**Enum:** `App\Enums\StoreUserRole` - backed by string values: `owner`, `admin`, `staff`, `support`

**Permission Matrix:**

| Permission | Owner | Admin | Staff | Support |
|---|---|---|---|---|
| Manage store settings | Yes | Yes | No | No |
| Manage staff | Yes | Yes | No | No |
| Manage products | Yes | Yes | Yes | No |
| Manage orders | Yes | Yes | Yes | Yes (read-only) |
| Manage discounts | Yes | Yes | Yes | No |
| Manage themes | Yes | Yes | No | No |
| Manage apps | Yes | Yes | No | No |
| View analytics | Yes | Yes | Yes | No |
| Manage shipping/tax | Yes | Yes | No | No |
| Process refunds | Yes | Yes | No | No |
| Create fulfillments | Yes | Yes | Yes | No |

**Implementation requirements:**

- Create a Laravel policy for each resource model (e.g., `ProductPolicy`, `OrderPolicy`).
- Register gate definitions in a service provider.
- Each policy method receives the User, looks up the user's role for the current store via the `store_users` pivot table, and checks the matrix above.
- Add a helper method on the User model - `roleForStore(store)` - that returns the user's role for a given store or null if the user has no access.

---

## 2. Product Lifecycle

### 2.1 Status Transitions

**Enum:** `App\Enums\ProductStatus` - values: `draft`, `active`, `archived`

```mermaid
stateDiagram-v2
    [*] --> Draft : Product created
    Draft --> Active : Publish (requires variant with price > 0, title not empty)
    Draft --> Archived : Archive
    Active --> Archived : Archive (hide from storefront)
    Archived --> Active : Re-publish (same preconditions as Draft->Active)
    Active --> Draft : Revert (BLOCKED if order_lines exist)
    Archived --> Draft : Revert (BLOCKED if order_lines exist)
```

**Transition rules:**

| From | To | Preconditions |
|---|---|---|
| Draft | Active | At least one variant with `price_amount > 0`; product `title` is not empty |
| Draft | Archived | None |
| Active | Archived | None (soft transition: product hidden from storefront, preserved in order history) |
| Archived | Active | Same preconditions as Draft to Active |
| Active | Draft | **BLOCKED** if any `order_lines` reference variants of this product |
| Archived | Draft | **BLOCKED** if any `order_lines` reference variants of this product |

**Deletion rules:**
- Only `draft` products with zero `order_lines` references may be hard-deleted.
- Products with existing order references must be archived, never deleted, to preserve order history integrity.

**Service:** `App\Services\ProductService`
- Method `transitionStatus(product, newStatus)` validates the current state, checks preconditions, throws `InvalidProductTransitionException` on failure.
- On activation: set `published_at` to current time if not already set.
- Dispatch `ProductStatusChanged` event after successful transition.

### 2.2 Variant and Option Matrix

**Rules:**

- A product has 0 to 3 options (e.g., Size, Color, Material), stored in `product_options`.
- Each option has 1 or more values, stored in `product_option_values`.
- Variants represent the cartesian product of option values (or a manually curated subset).
- When a product has no options, a single "Default" variant is auto-created with `is_default = 1`.

**Matrix rebuild logic (when options change):**

```
PROCEDURE rebuildMatrix(product):
    current_option_values = load all option values grouped by option
    desired_combos = cartesianProduct(current_option_values)
    existing_variants = load all variants with their option value sets

    FOR EACH combo IN desired_combos:
        IF combo matches an existing variant's option value set:
            SKIP (preserve existing variant - prices, SKUs, inventory intact)
        ELSE:
            CREATE new variant with default pricing from first existing variant

    FOR EACH existing_variant NOT matching any desired combo:
        IF variant has order_line references:
            ARCHIVE variant (set status = 'archived')
        ELSE:
            DELETE variant
```

**Service:** `App\Services\VariantMatrixService`

### 2.3 SKU Uniqueness

- Combination of store_id (derived through the product's store) and SKU must be unique.
- Enforced at application level before save.
- Null or empty SKU values are exempt from the uniqueness check (multiple variants may have no SKU).
- Validation: query all variants belonging to products in the same store, check for SKU collision excluding the current variant's ID.

### 2.4 Handle/Slug Generation

**Helper class:** `App\Support\HandleGenerator`

- Auto-generate from the title by converting to a URL-safe slug (lowercase, hyphens for spaces, strip special characters).
- Uniqueness enforced per store via the database unique index on `(store_id, handle)`.
- On collision, append incrementing suffix: `my-product`, `my-product-1`, `my-product-2`, etc.
- Merchants can manually edit the handle; on save, re-validate uniqueness.
- Same logic applies to collections and pages.

---

## 3. Inventory Management

### 3.1 Tracking Model

Each `product_variant` has exactly one `inventory_item` record (created automatically when the variant is created).

| Field | Description |
|---|---|
| `quantity_on_hand` | Total physical stock count |
| `quantity_reserved` | Units held for active checkouts or pending orders |
| **Available** (computed) | `quantity_on_hand - quantity_reserved` |

### 3.2 Inventory Policy

Per-variant policy stored in `inventory_items.policy`:

| Policy | Behavior |
|---|---|
| `deny` | Block add-to-cart when available <= 0. Storefront displays "Out of stock". |
| `continue` | Allow add-to-cart regardless of stock level. When available <= 0, storefront displays "Available on backorder". |

### 3.3 Inventory Operations


# Collaboration Mode: Default

You are now in Default mode. Any previous instructions for other modes (e.g. Plan mode) are no longer active.

Your active mode changes only when new developer instructions with a different `<collaboration_mode>...</collaboration_mode>` change it; user requests or tool descriptions do not change mode by themselves. Known mode names are Default and Plan.

## request_user_input availability

The `request_user_input` tool is unavailable in Default mode. If you call it while in Default mode, it will return an error.

If a decision is necessary and cannot be discovered from local context, ask the user directly. However, in Default mode you should strongly prefer executing the user's request rather than stopping to ask questions.

Summary: auto

# Shop

Self-contained e-commerce platform with multi-tenant support, product catalog, cart, checkout, payments (mock PSP), order management, customer accounts, and an admin panel.

## Tech Stack

- PHP 8.4 / Laravel 12
- Livewire v4 / Flux UI Free v2
- Tailwind CSS v4
- SQLite
- Pest v4

## Specs

The complete specification is in `specs/`. Start with `specs/09-IMPLEMENTATION-ROADMAP.md` for the build order, then reference the other files as needed:

- `specs/01-DATABASE-SCHEMA.md` - Database schema
- `specs/02-API-ROUTES.md` - Routes and API endpoints
- `specs/03-ADMIN-UI.md` - Admin panel
- `specs/04-STOREFRONT-UI.md` - Storefront
- `specs/05-BUSINESS-LOGIC.md` - Business logic
- `specs/06-AUTH-AND-SECURITY.md` - Auth and security
- `specs/07-SEEDERS-AND-TEST-DATA.md` - Seeders and test data
- `specs/08-PLAYWRIGHT-E2E-PLAN.md` - E2E browser tests
- `specs/09-IMPLEMENTATION-ROADMAP.md` - Implementation roadmap

## Skills
A skill is a set of local instructions to follow that is stored in a `SKILL.md` file. Below is the list of skills that can be used. Each entry includes a name, description, and file path so you can open the source for full instructions when using a specific skill.
### Available skills
- skill-creator: Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Codex's capabilities with specialized knowledge, workflows, or tool integrations. (file: /Users/fabianwesner/.codex/skills/.system/skill-creator/SKILL.md)
- skill-installer: Install Codex skills into $CODEX_HOME/skills from a curated list or a GitHub repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos). (file: /Users/fabianwesner/.codex/skills/.system/skill-installer/SKILL.md)
### How to use skills
- Discovery: The list above is the skills available in this session (name + description + file path). Skill bodies live on disk at the listed paths.
- Trigger rules: If the user names a skill (with `$SkillName` or plain text) OR the task clearly matches a skill's description shown above, you must use that skill for that turn. Multiple mentions mean use them all. Do not carry skills across turns unless re-mentioned.
- Missing/blocked: If a named skill isn't in the list or the path can't be read, say so briefly and continue with the best fallback.
- How to use a skill (progressive disclosure):
  1) After deciding to use a skill, open its `SKILL.md`. Read only enough to follow the workflow.
  2) When `SKILL.md` references relative paths (e.g., `scripts/foo.py`), resolve them relative to the skill directory listed above first, and only consider other paths if needed.
  3) If `SKILL.md` points to extra folders such as `references/`, load only the specific files needed for the request; don't bulk-load everything.
  4) If `scripts/` exist, prefer running or patching them instead of retyping large code blocks.
  5) If `assets/` or templates exist, reuse them instead of recreating from scratch.
- Coordination and sequencing:
  - If multiple skills apply, choose the minimal set that covers the request and state the order you'll use them.
  - Announce which skill(s) you're using and why (one short line). If you skip an obvious skill, say why.
- Context hygiene:
  - Keep context small: summarize long sections instead of pasting them; only load extra files when needed.
  - Avoid deep reference-chasing: prefer opening only files directly linked from `SKILL.md` unless you're blocked.
  - When variants exist (frameworks, providers, domains), pick only the relevant reference file(s) and note that choice.
- Safety and fallback: If a skill can't be applied cleanly (missing files, unclear instructions), state the issue, pick the next-best approach, and continue.


**Planning phased iterative implementation**


find app/Models -maxdepth 2 -type f | sort


Output:
Chunk ID: a72478
Wall time: 0.0510 seconds
Process exited with code 0
Original token count: 327
Output:
app/Models/AnalyticsDaily.php
app/Models/AnalyticsEvent.php
app/Models/App.php
app/Models/AppInstallation.php
app/Models/Cart.php
app/Models/CartLine.php
app/Models/Checkout.php
app/Models/Collection.php
app/Models/CollectionProduct.php
app/Models/Concerns/BelongsToStore.php
app/Models/Customer.php
app/Models/CustomerAddress.php
app/Models/Discount.php
app/Models/Fulfillment.php
app/Models/FulfillmentLine.php
app/Models/InventoryItem.php
app/Models/NavigationItem.php
app/Models/NavigationMenu.php
app/Models/OauthClient.php
app/Models/OauthToken.php
app/Models/Order.php
app/Models/OrderLine.php
app/Models/Organization.php
app/Models/Page.php
app/Models/Payment.php
app/Models/Product.php
app/Models/ProductMedia.php
app/Models/ProductOption.php
app/Models/ProductOptionValue.php
app/Models/ProductVariant.php
app/Models/Refund.php
app/Models/Scopes/StoreScope.php
app/Models/SearchQuery.php
app/Models/SearchSetting.php
app/Models/ShippingRate.php
app/Models/ShippingZone.php
app/Models/Store.php
app/Models/StoreDomain.php
app/Models/StoreSettings.php
app/Models/StoreUser.php
app/Models/TaxSetting.php
app/Models/Theme.php
app/Models/ThemeFile.php
app/Models/ThemeSetting.php
app/Models/User.php
app/Models/VariantOptionValue.php
app/Models/WebhookDelivery.php
app/Models/WebhookSubscription.php


Summary: auto


**Reviewing route placeholders**


Output:
Chunk ID: 562593
Wall time: 0.0512 seconds
Process exited with code 0
Original token count: 938
Output:
<?php

use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Route;

Route::prefix('admin')
    ->name('admin.auth.')
    ->group(function (): void {
        Route::get('login', fn (): string => 'Admin login placeholder')->name('login');
        Route::get('forgot-password', fn (): string => 'Admin forgot-password placeholder')->name('forgot-password');
        Route::get('reset-password/{token}', fn (): string => 'Admin reset-password placeholder')->name('reset-password');

        Route::post('logout', function (Request $request): RedirectResponse {
            Auth::guard('web')->logout();
            $request->session()->invalidate();
            $request->session()->regenerateToken();

            return redirect()->route('admin.auth.login');
        })->middleware('auth')->name('logout');
    });

Route::middleware(['auth', 'verified', 'store.resolve', 'role.check'])
    ->prefix('admin')
    ->name('admin.')
    ->group(function (): void {
        Route::get('/', fn (): string => 'Admin dashboard placeholder')->name('dashboard');
    });

Route::middleware('store.resolve')->group(function (): void {
    Route::get('/', fn () => view('welcome'))->name('home');
    Route::get('/collections', fn (): string => 'Storefront collections placeholder')->name('storefront.collections.index');
    Route::get('/collections/{handle}', fn (string $handle): string => sprintf('Storefront collection placeholder: %s', $handle))->name('storefront.collections.show');
    Route::get('/products/{handle}', fn (string $handle): string => sprintf('Storefront product placeholder: %s', $handle))->name('storefront.products.show');
    Route::get('/cart', fn (): string => 'Storefront cart placeholder')->name('storefront.cart.show');
    Route::get('/search', fn (): string => 'Storefront search placeholder')->name('storefront.search.index');
    Route::get('/pages/{handle}', fn (string $handle): string => sprintf('Storefront page placeholder: %s', $handle))->name('storefront.pages.show');
    Route::get('/checkout/{checkoutId}', fn (string $checkoutId): string => sprintf('Checkout placeholder: %s', $checkoutId))->name('storefront.checkout.show');
    Route::get('/checkout/{checkoutId}/confirmation', fn (string $checkoutId): string => sprintf('Checkout confirmation placeholder: %s', $checkoutId))->name('storefront.checkout.confirmation');

    Route::prefix('account')
        ->name('account.')
        ->group(function (): void {
            Route::get('login', fn (): string => 'Customer login placeholder')->name('login');
            Route::get('register', fn (): string => 'Customer register placeholder')->name('register');
            Route::get('forgot-password', fn (): string => 'Customer forgot-password placeholder')->name('forgot-password');
            Route::get('reset-password/{token}', fn (): string => 'Customer reset-password placeholder')->name('reset-password');

            Route::middleware('auth:customer')->group(function (): void {
                Route::get('/', fn (): string => 'Customer account dashboard placeholder')->name('dashboard');
                Route::get('/orders', fn (): string => 'Customer account orders placeholder')->name('orders.index');
                Route::get('/orders/{orderNumber}', fn (string $orderNumber): string => sprintf('Customer order placeholder: %s', $orderNumber))->name('orders.show');
                Route::get('/addresses', fn (): string => 'Customer account addresses placeholder')->name('addresses.index');
            });
        });
});

Route::view('dashboard', 'dashboard')
    ->middleware(['auth', 'verified'])
    ->name('dashboard');

require __DIR__.'/settings.php';


**Inspecting API route definitions**


Output:
Chunk ID: 565458
Wall time: 0.0507 seconds
Process exited with code 0
Original token count: 1265
Output:
<?php

use App\Http\Controllers\Api\Admin\CollectionController as AdminCollectionController;
use App\Http\Controllers\Api\Admin\DiscountController as AdminDiscountController;
use App\Http\Controllers\Api\Admin\MeController as AdminMeController;
use App\Http\Controllers\Api\Admin\ProductController as AdminProductController;
use App\Http\Controllers\Api\Storefront\AnalyticsEventController;
use App\Http\Controllers\Api\Storefront\CartController;
use App\Http\Controllers\Api\Storefront\CheckoutController;
use App\Http\Controllers\Api\Storefront\OrderController;
use App\Http\Controllers\Api\Storefront\SearchController;
use Illuminate\Support\Facades\Route;

Route::prefix('storefront/v1')
    ->middleware('store.resolve')
    ->name('api.storefront.')
    ->group(function (): void {
        Route::get('/health', fn (): array => ['ok' => true])
            ->middleware('throttle:api.storefront')
            ->name('health');

        Route::prefix('carts')
            ->middleware('throttle:api.storefront')
            ->name('carts.')
            ->group(function (): void {
                Route::post('/', [CartController::class, 'store'])->name('store');
                Route::get('/{cart}', [CartController::class, 'show'])->name('show');
                Route::post('/{cart}/lines', [CartController::class, 'addLine'])->name('lines.store');
                Route::put('/{cart}/lines/{line}', [CartController::class, 'updateLine'])->name('lines.update');
                Route::delete('/{cart}/lines/{line}', [CartController::class, 'removeLine'])->name('lines.destroy');
            });

        Route::prefix('checkouts')
            ->middleware('throttle:checkout')
            ->name('checkouts.')
            ->group(function (): void {
                Route::post('/', [CheckoutController::class, 'store'])->name('store');
                Route::get('/{checkout}', [CheckoutController::class, 'show'])->name('show');
                Route::put('/{checkout}/address', [CheckoutController::class, 'updateAddress'])->name('address');
                Route::put('/{checkout}/shipping-method', [CheckoutController::class, 'selectShippingMethod'])->name('shipping-method');
                Route::put('/{checkout}/payment-method', [CheckoutController::class, 'selectPaymentMethod'])->name('payment-method');
                Route::post('/{checkout}/apply-discount', [CheckoutController::class, 'applyDiscount'])->name('apply-discount');
                Route::delete('/{checkout}/discount', [CheckoutController::class, 'removeDiscount'])->name('remove-discount');
                Route::post('/{checkout}/pay', [CheckoutController::class, 'pay'])->name('pay');
            });

        Route::get('/orders/{orderNumber}', [OrderController::class, 'show'])
            ->middleware('throttle:api.storefront')
            ->name('orders.show');

        Route::prefix('search')
            ->middleware('throttle:search')
            ->name('search.')
            ->group(function (): void {
                Route::get('/', [SearchController::class, 'search'])->name('index');
                Route::get('/suggest', [SearchController::class, 'suggest'])->name('suggest');
            });

        Route::prefix('analytics')
            ->middleware('throttle:analytics')
            ->name('analytics.')
            ->group(function (): void {
                Route::post('/events', [AnalyticsEventController::class, 'store'])->name('events.store');
            });
    });

Route::prefix('admin/v1')
    ->middleware(['auth:sanctum', 'store.resolve', 'throttle:api.admin'])
    ->name('api.admin.')
    ->group(function (): void {
        Route::get('/me', [AdminMeController::class, 'show'])->name('me');

        Route::prefix('stores/{store}')
            ->group(function (): void {
                Route::apiResource('products', AdminProductController::class)
                    ->names([
                        'index' => 'products.index',
                        'store' => 'products.store',
                        'show' => 'products.show',
                        'update' => 'products.update',
                        'destroy' => 'products.destroy',
                    ]);

                Route::apiResource('collections', AdminCollectionController::class)
                    ->names([
                        'index' => 'collections.index',
                        'store' => 'collections.store',
                        'show' => 'collections.show',
                        'update' => 'collections.update',
                        'destroy' => 'collections.destroy',
                    ]);

                Route::apiResource('discounts', AdminDiscountController::class)
                    ->names([
                        'index' => 'discounts.index',
                        'store' => 'discounts.store',
                        'show' => 'discounts.show',
                        'update' => 'discounts.update',
                        'destroy' => 'discounts.destroy',
                    ]);
            });
    });


**Planning schema inspection approach**


Question: SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;


Output: [{"type":"text","text":"[\n    {\n        \"name\": \"analytics_daily\"\n    },\n    {\n        \"name\": \"analytics_events\"\n    },\n    {\n        \"name\": \"app_installations\"\n    },\n    {\n        \"name\": \"apps\"\n    },\n    {\n        \"name\": \"cache\"\n    },\n    {\n        \"name\": \"cache_locks\"\n    },\n    {\n        \"name\": \"cart_lines\"\n    },\n    {\n        \"name\": \"carts\"\n    },\n    {\n        \"name\": \"checkouts\"\n    },\n    {\n        \"name\": \"collection_products\"\n    },\n    {\n        \"name\": \"collections\"\n    },\n    {\n        \"name\": \"customer_addresses\"\n    },\n    {\n        \"name\": \"customer_password_reset_tokens\"\n    },\n    {\n        \"name\": \"customers\"\n    },\n    {\n        \"name\": \"discounts\"\n    },\n    {\n        \"name\": \"failed_jobs\"\n    },\n    {\n        \"name\": \"fulfillment_lines\"\n    },\n    {\n        \"name\": \"fulfillments\"\n    },\n    {\n        \"name\": \"inventory_items\"\n    },\n    {\n        \"name\": \"job_batches\"\n    },\n    {\n        \"name\": \"jobs\"\n    },\n    {\n        \"name\": \"migrations\"\n    },\n    {\n        \"name\": \"navigation_items\"\n    },\n    {\n        \"name\": \"navigation_menus\"\n    },\n    {\n        \"name\": \"oauth_clients\"\n    },\n    {\n        \"name\": \"oauth_tokens\"\n    },\n    {\n        \"name\": \"order_lines\"\n    },\n    {\n        \"name\": \"orders\"\n    },\n    {\n        \"name\": \"organizations\"\n    },\n    {\n        \"name\": \"pages\"\n    },\n    {\n        \"name\": \"password_reset_tokens\"\n    },\n    {\n        \"name\": \"payments\"\n    },\n    {\n        \"name\": \"product_media\"\n    },\n    {\n        \"name\": \"product_option_values\"\n    },\n    {\n        \"name\": \"product_options\"\n    },\n    {\n        \"name\": \"product_variants\"\n    },\n    {\n        \"name\": \"products\"\n    },\n    {\n        \"name\": \"refunds\"\n    },\n    {\n        \"name\": \"search_queries\"\n    },\n    {\n        \"name\": \"search_settings\"\n    },\n    {\n        \"name\": \"sessions\"\n    },\n    {\n        \"name\": \"shipping_rates\"\n    },\n    {\n        \"name\": \"shipping_zones\"\n    },\n    {\n        \"name\": \"sqlite_sequence\"\n    },\n    {\n        \"name\": \"store_domains\"\n    },\n    {\n        \"name\": \"store_settings\"\n    },\n    {\n        \"name\": \"store_users\"\n    },\n    {\n        \"name\": \"stores\"\n    },\n    {\n        \"name\": \"tax_settings\"\n    },\n    {\n        \"name\": \"theme_files\"\n    },\n    {\n        \"name\": \"theme_settings\"\n    },\n    {\n        \"name\": \"themes\"\n    },\n    {\n        \"name\": \"users\"\n    },\n    {\n        \"name\": \"variant_option_values\"\n    },\n    {\n        \"name\": \"webhook_deliveries\"\n    },\n    {\n        \"name\": \"webhook_subscriptions\"\n    }\n]"}]


**Inspecting models and services**


sed -n '1,260p' app/Services/CartService.php


sed -n '1,360p' app/Services/CheckoutService.php


sed -n '1,260p' app/Services/PricingEngine.php


sed -n '1,260p' app/Services/DiscountService.php


Output:
Chunk ID: d8c6ff
Wall time: 0.0502 seconds
Process exited with code 0
Original token count: 2096
Output:
<?php

declare(strict_types=1);

namespace App\Services;

use App\Enums\CartStatus;
use App\Enums\ProductStatus;
use App\Enums\ProductVariantStatus;
use App\Exceptions\CartVersionMismatchException;
use App\Exceptions\InsufficientInventoryException;
use App\Models\Cart;
use App\Models\CartLine;
use App\Models\Customer;
use App\Models\ProductVariant;
use App\Models\Store;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Illuminate\Support\Facades\DB;
use InvalidArgumentException;

final class CartService
{
    public function __construct(
        private readonly InventoryService $inventoryService,
    ) {}

    public function create(Store $store, ?Customer $customer = null): Cart
    {
        return Cart::query()->create([
            'store_id' => (int) $store->id,
            'customer_id' => $customer?->id,
            'currency' => (string) $store->default_currency,
            'cart_version' => 1,
            'status' => CartStatus::Active,
        ]);
    }

    public function addLine(Cart $cart, int $variantId, int $quantity, ?int $expectedVersion = null): CartLine
    {
        $this->assertPositiveQuantity($quantity);

        /** @var CartLine $line */
        $line = DB::transaction(function () use ($cart, $variantId, $quantity, $expectedVersion): CartLine {
            $lockedCart = $this->lockCart($cart);

            $this->ensureMutableCart($lockedCart);
            $this->assertExpectedVersion($lockedCart, $expectedVersion);

            $variant = $this->resolvePurchasableVariant((int) $lockedCart->store_id, $variantId);

            /** @var CartLine|null $existingLine */
            $existingLine = CartLine::query()
                ->where('cart_id', '=', (int) $lockedCart->id)
                ->where('variant_id', '=', $variantId)
                ->lockForUpdate()
                ->first();

            $newQuantity = ((int) $existingLine?->quantity) + $quantity;
            $this->assertInventoryAvailableForQuantity($variant, $newQuantity);

            if ($existingLine === null) {
                $existingLine = CartLine::query()->create([
                    'cart_id' => (int) $lockedCart->id,
                    'variant_id' => $variantId,
                    'quantity' => $newQuantity,
                    'unit_price_amount' => (int) $variant->price_amount,
                    'line_subtotal_amount' => 0,
                    'line_discount_amount' => 0,
                    'line_total_amount' => 0,
                ]);
            } else {
                $existingLine->quantity = $newQuantity;
                $existingLine->unit_price_amount = (int) $variant->price_amount;
            }

            $this->recalculateLineAmounts($existingLine);
            $existingLine->save();

            $this->incrementVersion($lockedCart);
            $this->syncCart($cart, $lockedCart);

            return $existingLine->refresh();
        });

        return $line;
    }

    public function updateLineQuantity(Cart $cart, int $lineId, int $quantity, ?int $expectedVersion = null): ?CartLine
    {
        if ($quantity < 0) {
            throw new InvalidArgumentException('Quantity must be zero or greater.');
        }

        if ($quantity === 0) {
            $this->removeLine($cart, $lineId, $expectedVersion);

            return null;
        }

        /** @var CartLine $line */
        $line = DB::transaction(function () use ($cart, $lineId, $quantity, $expectedVersion): CartLine {
            $lockedCart = $this->lockCart($cart);

            $this->ensureMutableCart($lockedCart);
            $this->assertExpectedVersion($lockedCart, $expectedVersion);

            /** @var CartLine $line */
            $line = CartLine::query()
                ->where('id', '=', $lineId)
                ->where('cart_id', '=', (int) $lockedCart->id)
                ->lockForUpdate()
                ->firstOrFail();

            $variant = $this->resolvePurchasableVariant((int) $lockedCart->store_id, (int) $line->variant_id);
            $this->assertInventoryAvailableForQuantity($variant, $quantity);

            $line->quantity = $quantity;
            $line->unit_price_amount = (int) $variant->price_amount;

            $this->recalculateLineAmounts($line);
            $line->save();

            $this->incrementVersion($lockedCart);
            $this->syncCart($cart, $lockedCart);

            return $line->refresh();
        });

        return $line;
    }

    public function removeLine(Cart $cart, int $lineId, ?int $expectedVersion = null): void
    {
        DB::transaction(function () use ($cart, $lineId, $expectedVersion): void {
            $lockedCart = $this->lockCart($cart);

            $this->ensureMutableCart($lockedCart);
            $this->assertExpectedVersion($lockedCart, $expectedVersion);

            $line = CartLine::query()
                ->where('id', '=', $lineId)
                ->where('cart_id', '=', (int) $lockedCart->id)
                ->lockForUpdate()
                ->firstOrFail();

            $line->delete();

            $this->incrementVersion($lockedCart);
            $this->syncCart($cart, $lockedCart);
        });
    }

    /**
     * @return array{subtotal: int, discount: int, total: int, line_count: int, item_count: int, currency: string}
     */
    public function computeCartTotals(Cart $cart): array
    {
        $cart->loadMissing('lines');

        $subtotal = 0;
        $discount = 0;
        $itemCount = 0;

        foreach ($cart->lines as $line) {
            $subtotal += (int) $line->line_subtotal_amount;
            $discount += (int) $line->line_discount_amount;
            $itemCount += (int) $line->quantity;
        }

        return [
            'subtotal' => $subtotal,
            'discount' => $discount,
            'total' => $subtotal - $discount,
            'line_count' => $cart->lines->count(),
            'item_count' => $itemCount,
            'currency' => (string) $cart->currency,
        ];
    }

    private function assertExpectedVersion(Cart $cart, ?int $expectedVersion): void
    {
        if ($expectedVersion === null) {
            return;
        }

        $currentVersion = (int) $cart->cart_version;

        if ($currentVersion !== $expectedVersion) {
            throw new CartVersionMismatchException(
                cartId: (int) $cart->id,
                expectedVersion: $expectedVersion,
                currentVersion: $currentVersion,
            );
        }
    }

    private function assertPositiveQuantity(int $quantity): void
    {
        if ($quantity <= 0) {
            throw new InvalidArgumentException('Quantity must be greater than zero.');
        }
    }

    private function ensureMutableCart(Cart $cart): void
    {
        if ($cart->status !== CartStatus::Active) {
            throw new InvalidArgumentException(sprintf('Cart %d is not active.', (int) $cart->id));
        }
    }

    private function recalculateLineAmounts(CartLine $line): void
    {
        $lineSubtotal = (int) $line->unit_price_amount * (int) $line->quantity;

        $line->line_subtotal_amount = $lineSubtotal;

        if ((int) $line->line_discount_amount < 0) {
            $line->line_discount_amount = 0;
        }

        $line->line_total_amount = max(0, $lineSubtotal - (int) $line->line_discount_amount);
    }

    private function incrementVersion(Cart $cart): void
    {
        $cart->cart_version = (int) $cart->cart_version + 1;
        $cart->save();
    }

    private function lockCart(Cart $cart): Cart
    {
        /** @var Cart $locked */
        $locked = Cart::query()
            ->whereKey($cart->getKey())
            ->lockForUpdate()
            ->firstOrFail();

        return $locked;
    }

    private function syncCart(Cart $target, Cart $source): void
    {
        $target->cart_version = (int) $source->cart_version;
        $target->status = $source->status;
        $target->currency = $source->currency;
        $target->updated_at = $source->updated_at;
    }

    private function assertInventoryAvailableForQuantity(ProductVariant $variant, int $quantity): void
    {
        $inventoryItem = $variant->inventoryItem;

        if ($inventoryItem === null) {
            return;
        }

        if ($this->inventoryService->checkAvailability($inventoryItem, $quantity)) {
            return;
        }


Output:
Chunk ID: 3430ff
Wall time: 0.0509 seconds
Process exited with code 0
Original token count: 3090
Output:
<?php

declare(strict_types=1);

namespace App\Services;

use App\Enums\CartStatus;
use App\Enums\CheckoutStatus;
use App\Enums\PaymentMethod;
use App\Exceptions\InvalidCheckoutStateException;
use App\Models\Cart;
use App\Models\CartLine;
use App\Models\Checkout;
use App\ValueObjects\PricingResult;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\DB;
use InvalidArgumentException;

final class CheckoutService
{
    public function __construct(
        private readonly PricingEngine $pricingEngine,
        private readonly ShippingCalculator $shippingCalculator,
        private readonly DiscountService $discountService,
        private readonly InventoryService $inventoryService,
    ) {}

    public function createFromCart(Cart $cart, ?string $email = null): Checkout
    {
        /** @var Checkout $checkout */
        $checkout = DB::transaction(function () use ($cart, $email): Checkout {
            $lockedCart = $this->lockCart($cart);
            $lockedCart->loadMissing('lines');

            if ($lockedCart->status !== CartStatus::Active) {
                throw InvalidCheckoutStateException::cartNotActive((int) $lockedCart->id, $lockedCart->status->value);
            }

            if ($lockedCart->lines->isEmpty()) {
                throw InvalidCheckoutStateException::emptyCart((int) $lockedCart->id);
            }

            $checkout = Checkout::query()->create([
                'store_id' => (int) $lockedCart->store_id,
                'cart_id' => (int) $lockedCart->id,
                'customer_id' => $lockedCart->customer_id,
                'status' => CheckoutStatus::Started,
                'email' => $email,
                'expires_at' => now()->addDay(),
            ]);

            $this->pricingEngine->calculate($checkout);

            return $checkout->refresh();
        });

        return $checkout;
    }

    /**
     * @param  array<string, mixed>  $shippingAddress
     * @param  array<string, mixed>|null  $billingAddress
     */
    public function setAddress(
        Checkout $checkout,
        string $email,
        array $shippingAddress,
        ?array $billingAddress = null,
        bool $useShippingAsBilling = true,
    ): Checkout {
        /** @var Checkout $updated */
        $updated = DB::transaction(function () use ($checkout, $email, $shippingAddress, $billingAddress, $useShippingAsBilling): Checkout {
            $lockedCheckout = $this->lockCheckout($checkout);
            $this->assertMutable($lockedCheckout);

            if (! filter_var($email, FILTER_VALIDATE_EMAIL)) {
                throw new InvalidArgumentException('A valid email address is required.');
            }

            $requiresShipping = $this->shippingCalculator->cartRequiresShipping($lockedCheckout->cart);

            $normalizedShipping = [];

            if ($requiresShipping) {
                $normalizedShipping = $this->normalizeAddress($shippingAddress, (int) $lockedCheckout->id);

                if ($this->shippingCalculator->getAvailableRates($lockedCheckout->store, $normalizedShipping, $lockedCheckout->cart)->isEmpty()) {
                    throw InvalidCheckoutStateException::unserviceableAddress((int) $lockedCheckout->id);
                }
            }

            $normalizedBilling = null;

            if ($useShippingAsBilling) {
                $normalizedBilling = $normalizedShipping;
            } elseif ($billingAddress !== null) {
                $normalizedBilling = $this->normalizeAddress($billingAddress, (int) $lockedCheckout->id, requireAllFields: false);
            }

            $lockedCheckout->email = $email;
            $lockedCheckout->shipping_address_json = $normalizedShipping === [] ? null : $normalizedShipping;
            $lockedCheckout->billing_address_json = $normalizedBilling === [] ? null : $normalizedBilling;
            $lockedCheckout->status = CheckoutStatus::Addressed;
            $lockedCheckout->save();

            $this->pricingEngine->calculate($lockedCheckout);

            return $lockedCheckout->refresh();
        });

        return $updated;
    }

    public function setShippingMethod(Checkout $checkout, ?int $shippingRateId): Checkout
    {
        /** @var Checkout $updated */
        $updated = DB::transaction(function () use ($checkout, $shippingRateId): Checkout {
            $lockedCheckout = $this->lockCheckout($checkout);
            $this->assertState($lockedCheckout, [CheckoutStatus::Addressed, CheckoutStatus::ShippingSelected]);
            $this->assertMutable($lockedCheckout);

            if (! $this->shippingCalculator->cartRequiresShipping($lockedCheckout->cart)) {
                $lockedCheckout->shipping_method_id = null;
                $lockedCheckout->status = CheckoutStatus::ShippingSelected;
                $lockedCheckout->save();

                $this->pricingEngine->calculate($lockedCheckout);

                return $lockedCheckout->refresh();
            }

            $address = $lockedCheckout->shipping_address_json;

            if (! is_array($address)) {
                throw InvalidCheckoutStateException::shippingAddressRequired((int) $lockedCheckout->id);
            }

            if ($shippingRateId === null || $shippingRateId <= 0) {
                throw InvalidCheckoutStateException::invalidShippingMethod((int) $lockedCheckout->id, 0);
            }

            $quote = $this->shippingCalculator->selectActiveRateByZone(
                store: $lockedCheckout->store,
                address: $address,
                cart: $lockedCheckout->cart,
                shippingRateId: $shippingRateId,
                checkoutId: (int) $lockedCheckout->id,
            );

            $lockedCheckout->shipping_method_id = $quote->rateId;
            $lockedCheckout->status = CheckoutStatus::ShippingSelected;
            $lockedCheckout->save();

            $this->pricingEngine->calculate($lockedCheckout);

            return $lockedCheckout->refresh();
        });

        return $updated;
    }

    public function selectPaymentMethod(Checkout $checkout, PaymentMethod|string $paymentMethod): Checkout
    {
        /** @var Checkout $updated */
        $updated = DB::transaction(function () use ($checkout, $paymentMethod): Checkout {
            $lockedCheckout = $this->lockCheckout($checkout);
            $this->assertMutable($lockedCheckout);

            $resolvedPaymentMethod = $this->resolvePaymentMethod($lockedCheckout, $paymentMethod);

            if ($lockedCheckout->status === CheckoutStatus::PaymentSelected
                && $lockedCheckout->payment_method === $resolvedPaymentMethod) {
                return $lockedCheckout->refresh();
            }

            $this->assertState($lockedCheckout, [CheckoutStatus::ShippingSelected]);

            /** @var CartLine $line */
            foreach ($lockedCheckout->cart->lines as $line) {
                $inventoryItem = $line->variant?->inventoryItem;

                if ($inventoryItem === null) {
                    continue;
                }

                $this->inventoryService->reserve($inventoryItem, (int) $line->quantity);
            }

            $lockedCheckout->payment_method = $resolvedPaymentMethod;
            $lockedCheckout->expires_at = now()->addDay();
            $lockedCheckout->status = CheckoutStatus::PaymentSelected;
            $lockedCheckout->save();

            $this->pricingEngine->calculate($lockedCheckout);

            return $lockedCheckout->refresh();
        });

        return $updated;
    }

    public function applyDiscount(Checkout $checkout, string $code): Checkout
    {
        /** @var Checkout $updated */
        $updated = DB::transaction(function () use ($checkout, $code): Checkout {
            $lockedCheckout = $this->lockCheckout($checkout);
            $this->assertMutable($lockedCheckout);

            $discount = $this->discountService->validate($code, $lockedCheckout->store, $lockedCheckout->cart);

            $lockedCheckout->discount_code = (string) $discount->code;
            $lockedCheckout->save();

            $this->pricingEngine->calculate($lockedCheckout);

            return $lockedCheckout->refresh();
        });

        return $updated;
    }

    public function removeDiscount(Checkout $checkout): Checkout
    {
        /** @var Checkout $updated */
        $updated = DB::transaction(function () use ($checkout): Checkout {
            $lockedCheckout = $this->lockCheckout($checkout);
            $this->assertMutable($lockedCheckout);

            $lockedCheckout->discount_code = null;
            $lockedCheckout->save();

            $this->pricingEngine->calculate($lockedCheckout);

            return $lockedCheckout->refresh();
        });

        return $updated;
    }

    public function computeTotals(Checkout $checkout): PricingResult
    {
        return $this->pricingEngine->calculate($checkout);
    }

    /**
     * @return Collection<int, \App\ValueObjects\ShippingRateQuote>
     */
    public function availableShippingMethods(Checkout $checkout): Collection
    {
        $checkout->loadMissing(['store', 'cart.lines.variant']);

        if (! is_array($checkout->shipping_address_json)) {
            return collect();
        }

        return $this->shippingCalculator->getAvailableRates(
            store: $checkout->store,
            address: $checkout->shipping_address_json,
            cart: $checkout->cart,
        );
    }

    private function assertMutable(Checkout $checkout): void
    {
        if (in_array($checkout->status, [CheckoutStatus::Completed, CheckoutStatus::Expired], true)) {
            throw InvalidCheckoutStateException::immutable($checkout);
        }
    }

    /**
     * @param  list<CheckoutStatus>  $expectedStates
     */
    private function assertState(Checkout $checkout, array $expectedStates): void
    {
        if (in_array($checkout->status, $expectedStates, true)) {
            return;
        }

        throw InvalidCheckoutStateException::invalidTransition(
            checkout: $checkout,
            expectedStates: array_map(static fn (CheckoutStatus $status): string => $status->value, $expectedStates),
        );
    }

    /**
     * @param  array<string, mixed>  $address
     * @return array<string, string>
     */
    private function normalizeAddress(array $address, int $checkoutId, bool $requireAllFields = true): array
    {
        $requiredFields = [
            'first_name',
            'last_name',
            'address1',
            'city',
            'country',
            'country_code',
            'postal_code',
        ];

        if ($requireAllFields) {
            foreach ($requiredFields as $field) {
                $value = $address[$field] ?? null;

                if (! is_string($value) || trim($value) === '') {
                    throw InvalidCheckoutStateException::missingAddressField($checkoutId, $field);
                }
            }
        }

        $normalized = [];

        foreach ($address as $key => $value) {
            if (! is_string($key)) {
                continue;
            }

            if (! is_string($value) && ! is_numeric($value)) {
                continue;
            }

            $normalized[$key] = trim((string) $value);
        }

        if (isset($normalized['country_code'])) {
            $normalized['country_code'] = strtoupper($normalized['country_code']);
        }

        if (isset($normalized['province_code'])) {
            $normalized['province_code'] = strtoupper($normalized['province_code']);
        }

        return $normalized;
    }

    private function resolvePaymentMethod(Checkout $checkout, PaymentMethod|string $paymentMethod): PaymentMethod
    {
        if ($paymentMethod instanceof PaymentMethod) {
            return $paymentMethod;
        }

        $resolved = PaymentMethod::tryFrom($paymentMethod);

        if ($resolved === null) {
            throw InvalidCheckoutStateException::invalidPaymentMethod((int) $checkout->id, $paymentMethod);
        }

        return $resolved;
    }

    private function lockCart(Cart $cart): Cart
    {
        /** @var Cart $locked */
        $locked = Cart::query()
            ->whereKey($cart->getKey())
            ->lockForUpdate()
            ->firstOrFail();

        return $locked;
    }


Output:
Chunk ID: 002e9d
Wall time: 0.0509 seconds
Process exited with code 0
Original token count: 1726
Output:
<?php

declare(strict_types=1);

namespace App\Services;

use App\Exceptions\InvalidCheckoutStateException;
use App\Models\Cart;
use App\Models\CartLine;
use App\Models\Checkout;
use App\Models\TaxSetting;
use App\ValueObjects\DiscountCalculationResult;
use App\ValueObjects\PricingResult;
use App\ValueObjects\TaxCalculationResult;
use Illuminate\Support\Facades\DB;

final class PricingEngine
{
    public function __construct(
        private readonly DiscountService $discountService,
        private readonly ShippingCalculator $shippingCalculator,
        private readonly TaxCalculator $taxCalculator,
    ) {}

    public function calculate(Checkout $checkout): PricingResult
    {
        /** @var PricingResult $result */
        $result = DB::transaction(function () use ($checkout): PricingResult {
            $lockedCheckout = $this->lockCheckout($checkout);

            $cart = $lockedCheckout->cart;
            $this->recalculateLineSubtotals($cart);

            $subtotal = $this->subtotal($cart);
            $discountResult = $this->calculateDiscount($lockedCheckout);

            $this->discountService->applyToCartLines($cart, $discountResult);

            $shippingAmount = $this->shippingAmount($lockedCheckout, $cart, $discountResult);
            $taxResult = $this->taxResult($lockedCheckout, $cart, $shippingAmount);

            $total = max(0, ($subtotal - $discountResult->amount) + $shippingAmount + $taxResult->totalAmount);

            $pricingResult = new PricingResult(
                subtotal: $subtotal,
                discount: $discountResult->amount,
                shipping: $shippingAmount,
                taxLines: $taxResult->taxLines,
                taxTotal: $taxResult->totalAmount,
                total: $total,
                currency: (string) $cart->currency,
                lineDiscountAllocations: $discountResult->lineAllocations,
                freeShippingApplied: $discountResult->freeShipping,
            );

            $lockedCheckout->totals_json = $pricingResult->toArray();
            $lockedCheckout->tax_provider_snapshot_json = $this->buildTaxSnapshot($taxResult);
            $lockedCheckout->save();

            $this->syncCheckout($checkout, $lockedCheckout);

            return $pricingResult;
        });

        return $result;
    }

    private function calculateDiscount(Checkout $checkout): DiscountCalculationResult
    {
        $code = is_string($checkout->discount_code) ? trim($checkout->discount_code) : '';

        if ($code === '') {
            return DiscountCalculationResult::none();
        }

        $discount = $this->discountService->validate($code, $checkout->store, $checkout->cart);

        return $this->discountService->calculate($discount, $checkout->cart);
    }

    private function shippingAmount(Checkout $checkout, Cart $cart, DiscountCalculationResult $discountResult): int
    {
        if (! $this->shippingCalculator->cartRequiresShipping($cart)) {
            return 0;
        }

        if ($discountResult->freeShipping) {
            return 0;
        }

        if ($checkout->shipping_method_id === null) {
            return 0;
        }

        $address = $checkout->shipping_address_json;

        if (! is_array($address)) {
            throw InvalidCheckoutStateException::shippingAddressRequired((int) $checkout->id);
        }

        $quote = $this->shippingCalculator->selectActiveRateByZone(
            store: $checkout->store,
            address: $address,
            cart: $cart,
            shippingRateId: (int) $checkout->shipping_method_id,
            checkoutId: (int) $checkout->id,
        );

        return $quote->amount;
    }

    private function taxResult(Checkout $checkout, Cart $cart, int $shippingAmount): TaxCalculationResult
    {
        /** @var TaxSetting|null $taxSetting */
        $taxSetting = TaxSetting::query()->find((int) $checkout->store_id);

        if ($taxSetting === null) {
            return TaxCalculationResult::zero();
        }

        $address = is_array($checkout->shipping_address_json) ? $checkout->shipping_address_json : [];
        $lineAmounts = $cart->lines
            ->sortBy('id')
            ->map(static fn (CartLine $line): int => (int) $line->line_total_amount)
            ->values()
            ->all();

        return $this->taxCalculator->calculateForAmounts(
            lineAmounts: $lineAmounts,
            shippingAmount: $shippingAmount,
            settings: $taxSetting,
            address: $address,
        );
    }

    private function subtotal(Cart $cart): int
    {
        return (int) $cart->lines->sum(static fn (CartLine $line): int => (int) $line->line_subtotal_amount);
    }

    private function recalculateLineSubtotals(Cart $cart): void
    {
        $cart->loadMissing('lines');

        /** @var CartLine $line */
        foreach ($cart->lines as $line) {
            $lineSubtotal = (int) $line->unit_price_amount * (int) $line->quantity;
            $lineDiscount = max(0, min($lineSubtotal, (int) $line->line_discount_amount));
            $lineTotal = $lineSubtotal - $lineDiscount;

            $line->line_subtotal_amount = $lineSubtotal;
            $line->line_discount_amount = $lineDiscount;
            $line->line_total_amount = $lineTotal;
            $line->save();
        }
    }

    /**
     * @return array<string, mixed>
     */
    private function buildTaxSnapshot(TaxCalculationResult $result): array
    {
        return [
            'provider' => 'manual',
            'calculated_at' => now()->toISOString(),
            'rate_basis_points' => $result->rateBasisPoints,
            'lines' => array_map(static fn ($line): array => $line->toArray(), $result->taxLines),
            'tax_total' => $result->totalAmount,
        ];
    }

    private function lockCheckout(Checkout $checkout): Checkout
    {
        /** @var Checkout $locked */
        $locked = Checkout::query()
            ->with(['store', 'cart.lines.variant.product.collections'])
            ->whereKey($checkout->getKey())
            ->lockForUpdate()
            ->firstOrFail();

        return $locked;
    }

    private function syncCheckout(Checkout $target, Checkout $source): void
    {
        $target->status = $source->status;
        $target->payment_method = $source->payment_method;
        $target->email = $source->email;
        $target->shipping_address_json = $source->shipping_address_json;
        $target->billing_address_json = $source->billing_address_json;
        $target->shipping_method_id = $source->shipping_method_id;
        $target->discount_code = $source->discount_code;
        $target->tax_provider_snapshot_json = $source->tax_provider_snapshot_json;
        $target->totals_json = $source->totals_json;
        $target->expires_at = $source->expires_at;
        $target->updated_at = $source->updated_at;
    }
}


Output:
Chunk ID: 7346c5
Wall time: 0.0514 seconds
Process exited with code 0
Original token count: 2133
Output:
<?php

declare(strict_types=1);

namespace App\Services;

use App\Enums\DiscountStatus;
use App\Enums\DiscountValueType;
use App\Exceptions\InvalidDiscountException;
use App\Models\Cart;
use App\Models\CartLine;
use App\Models\Discount;
use App\Models\Store;
use App\ValueObjects\DiscountCalculationResult;
use Illuminate\Database\Eloquent\Collection as EloquentCollection;
use Illuminate\Support\Carbon;

final class DiscountService
{
    public function validate(string $code, Store $store, Cart $cart): Discount
    {
        $normalizedCode = trim($code);

        if ($normalizedCode === '') {
            throw InvalidDiscountException::notFound($code);
        }

        /** @var Discount|null $discount */
        $discount = Discount::query()
            ->where('store_id', '=', (int) $store->id)
            ->whereRaw('lower(code) = ?', [mb_strtolower($normalizedCode)])
            ->first();

        if ($discount === null) {
            throw InvalidDiscountException::notFound($normalizedCode);
        }

        if ($discount->status !== DiscountStatus::Active) {
            throw InvalidDiscountException::expired((string) $discount->code);
        }

        $now = Carbon::now();

        if ($discount->starts_at !== null && $discount->starts_at->gt($now)) {
            throw InvalidDiscountException::notYetActive((string) $discount->code);
        }

        if ($discount->ends_at !== null && $discount->ends_at->lt($now)) {
            throw InvalidDiscountException::expired((string) $discount->code);
        }

        if ($discount->usage_limit !== null && (int) $discount->usage_count >= (int) $discount->usage_limit) {
            throw InvalidDiscountException::usageLimitReached((string) $discount->code);
        }

        $rules = $this->rules($discount);
        $subtotal = $this->subtotal($cart);
        $minimum = $this->minimumPurchaseAmount($rules);

        if ($minimum !== null && $subtotal < $minimum) {
            throw InvalidDiscountException::minimumNotMet((string) $discount->code, $minimum);
        }

        $cart->loadMissing('lines.variant.product.collections');

        if ($this->hasRestrictions($rules)) {
            $qualifyingLines = $this->qualifyingLines($cart->lines, $rules);

            if ($qualifyingLines->isEmpty()) {
                throw InvalidDiscountException::notApplicable((string) $discount->code);
            }
        }

        return $discount;
    }

    public function calculate(Discount $discount, Cart $cart): DiscountCalculationResult
    {
        $cart->loadMissing('lines.variant.product.collections');
        $rules = $this->rules($discount);

        $qualifyingLines = $this->qualifyingLines($cart->lines->sortBy('id')->values(), $rules);
        $qualifyingSubtotal = (int) $qualifyingLines->sum(static fn (CartLine $line): int => (int) $line->line_subtotal_amount);

        if ($discount->value_type === DiscountValueType::FreeShipping) {
            return new DiscountCalculationResult(amount: 0, lineAllocations: [], freeShipping: true);
        }

        if ($qualifyingSubtotal <= 0 || $qualifyingLines->isEmpty()) {
            return DiscountCalculationResult::none();
        }

        $totalDiscount = $this->calculateTotalDiscount($discount, $qualifyingSubtotal);

        if ($totalDiscount <= 0) {
            return DiscountCalculationResult::none();
        }

        $allocations = [];
        $remainingDiscount = $totalDiscount;
        $lineCount = $qualifyingLines->count();

        /** @var CartLine $line */
        foreach ($qualifyingLines as $index => $line) {
            $lineId = (int) $line->id;

            if ($index === $lineCount - 1) {
                $allocations[$lineId] = $remainingDiscount;
                break;
            }

            $lineSubtotal = (int) $line->line_subtotal_amount;
            $proportional = (int) round(($totalDiscount * $lineSubtotal) / $qualifyingSubtotal);
            $allocation = max(0, min($proportional, $remainingDiscount));

            $allocations[$lineId] = $allocation;
            $remainingDiscount -= $allocation;
        }

        return new DiscountCalculationResult(
            amount: $totalDiscount,
            lineAllocations: $allocations,
            freeShipping: false,
        );
    }

    public function applyToCartLines(Cart $cart, DiscountCalculationResult $result): void
    {
        $cart->loadMissing('lines');

        /** @var CartLine $line */
        foreach ($cart->lines as $line) {
            $lineSubtotal = (int) $line->unit_price_amount * (int) $line->quantity;
            $lineDiscount = max(0, min($lineSubtotal, $result->amountForLine((int) $line->id)));
            $lineTotal = $lineSubtotal - $lineDiscount;

            $line->unit_price_amount = (int) $line->unit_price_amount;
            $line->line_subtotal_amount = $lineSubtotal;
            $line->line_discount_amount = $lineDiscount;
            $line->line_total_amount = $lineTotal;
            $line->save();
        }
    }

    /**
     * @return array<string, mixed>
     */
    private function rules(Discount $discount): array
    {
        $rules = $discount->rules_json;

        return is_array($rules) ? $rules : [];
    }

    private function subtotal(Cart $cart): int
    {
        $cart->loadMissing('lines');

        return (int) $cart->lines->sum(static fn (CartLine $line): int => (int) $line->line_subtotal_amount);
    }

    /**
     * @param  array<string, mixed>  $rules
     */
    private function minimumPurchaseAmount(array $rules): ?int
    {
        $minimum = $rules['min_purchase_amount'] ?? $rules['min_subtotal_amount'] ?? null;

        if (! is_int($minimum) && ! is_float($minimum) && ! is_string($minimum)) {
            return null;
        }

        return max(0, (int) $minimum);
    }

    /**
     * @param  array<string, mixed>  $rules
     */
    private function hasRestrictions(array $rules): bool
    {
        return $this->productIds($rules) !== [] || $this->collectionIds($rules) !== [];
    }

    /**
     * @param  EloquentCollection<int, CartLine>  $lines
     * @param  array<string, mixed>  $rules
     * @return EloquentCollection<int, CartLine>
     */
    private function qualifyingLines(EloquentCollection $lines, array $rules): EloquentCollection
    {
        $productIds = $this->productIds($rules);
        $collectionIds = $this->collectionIds($rules);

        if ($productIds === [] && $collectionIds === []) {
            return $lines;
        }

        return $lines->filter(function (CartLine $line) use ($productIds, $collectionIds): bool {
            $productId = (int) ($line->variant?->product_id ?? 0);

            $matchesProduct = $productIds !== [] && in_array($productId, $productIds, true);

            $matchesCollection = false;

            if ($collectionIds !== [] && $line->variant?->product !== null) {
                $collectionIdSet = $line->variant->product->collections
                    ->pluck('id')
                    ->map(static fn (mixed $id): int => (int) $id)
                    ->all();

                $matchesCollection = $this->containsAny($collectionIdSet, $collectionIds);
            }

            return $matchesProduct || $matchesCollection;
        })->values();
    }

    private function calculateTotalDiscount(Discount $discount, int $qualifyingSubtotal): int
    {
        if ($discount->value_type === DiscountValueType::Percent) {
            return max(0, (int) round(($qualifyingSubtotal * (int) $discount->value_amount) / 100));
        }

        if ($discount->value_type === DiscountValueType::Fixed) {
            return min($qualifyingSubtotal, max(0, (int) $discount->value_amount));
        }

        return 0;
    }

    /**
     * @param  array<string, mixed>  $rules
     * @return list<int>
     */
    private function productIds(array $rules): array
    {
        $raw = $rules['applicable_product_ids'] ?? null;

        if (! is_array($raw)) {
            return [];
        }

        return array_values(array_unique(array_map(static fn (mixed $value): int => (int) $value, $raw)));
    }

    /**
     * @param  array<string, mixed>  $rules
     * @return list<int>
     */
    private function collectionIds(array $rules): array
    {
        $raw = $rules['applicable_collection_ids'] ?? null;

        if (! is_array($raw)) {
            return [];
        }

        return array_values(array_unique(array_map(static fn (mixed $value): int => (int) $value, $raw)));
    }


**Inspecting truncated output**


sed -n '260,420p' app/Services/CartService.php


Output:
Chunk ID: 20e710
Wall time: 0.0510 seconds
Process exited with code 0
Original token count: 214
Output:

        throw InsufficientInventoryException::forItem($inventoryItem, $quantity);
    }

    private function resolvePurchasableVariant(int $storeId, int $variantId): ProductVariant
    {
        /** @var ProductVariant|null $variant */
        $variant = ProductVariant::query()
            ->whereKey($variantId)
            ->where('status', '=', ProductVariantStatus::Active)
            ->whereHas('product', static function ($query) use ($storeId): void {
                $query
                    ->where('store_id', '=', $storeId)
                    ->where('status', '=', ProductStatus::Active);
            })
            ->with('inventoryItem')
            ->first();

        if ($variant === null) {
            throw (new ModelNotFoundException)->setModel(ProductVariant::class, [$variantId]);
        }

        return $variant;
    }
}


**Planning order and payment inspection**


sed -n '1,380p' app/Http/Controllers/Api/Storefront/CheckoutController.php


sed -n '1,260p' app/Http/Controllers/Api/Storefront/OrderController.php


sed -n '1,320p' app/Http/Controllers/Api/Admin/ProductController.php


sed -n '1,320p' app/Http/Controllers/Api/Admin/CollectionController.php


sed -n '1,320p' app/Http/Controllers/Api/Admin/DiscountController.php


Output:
Chunk ID: e559ff
Wall time: 0.0515 seconds
Process exited with code 0
Original token count: 3883
Output:
<?php

namespace App\Http\Controllers\Api\Storefront;

use App\Http\Controllers\Api\Concerns\ResolvesApiContext;
use App\Http\Controllers\Controller;
use App\Http\Requests\Storefront\Checkouts\ApplyCheckoutDiscountRequest;
use App\Http\Requests\Storefront\Checkouts\PayCheckoutRequest;
use App\Http\Requests\Storefront\Checkouts\SelectCheckoutPaymentMethodRequest;
use App\Http\Requests\Storefront\Checkouts\SelectCheckoutShippingMethodRequest;
use App\Http\Requests\Storefront\Checkouts\StoreCheckoutRequest;
use App\Http\Requests\Storefront\Checkouts\UpdateCheckoutAddressRequest;
use App\Models\Cart;
use App\Models\Checkout;
use App\Models\Discount;
use App\Models\Order;
use App\Models\ShippingRate;
use App\Models\ShippingZone;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;

class CheckoutController extends Controller
{
    use ResolvesApiContext;

    public function store(StoreCheckoutRequest $request): JsonResponse
    {
        $store = $this->currentStoreModel($request);
        $validated = $request->validated();

        $cart = $this->findCart((int) $store->id, (int) $validated['cart_id']);

        if (! $cart instanceof Cart) {
            return response()->json([
                'message' => 'Cart not found.',
            ], 404);
        }

        if ($cart->lines->isEmpty()) {
            return response()->json([
                'message' => 'The given data was invalid.',
                'errors' => [
                    'cart_id' => ['Cannot create checkout from an empty cart.'],
                ],
            ], 422);
        }

        $service = $this->resolveService('App\\Services\\CheckoutService');

        if ($service !== null) {
            try {
                if (method_exists($service, 'createFromCart')) {
                    $serviceCheckout = $service->createFromCart($cart, (string) $validated['email']);

                    if ($serviceCheckout instanceof Checkout) {
                        return response()->json($this->checkoutPayload($this->loadCheckout($serviceCheckout)), 201);
                    }
                }

                if (method_exists($service, 'create')) {
                    $serviceCheckout = $service->create($cart, (string) $validated['email']);

                    if ($serviceCheckout instanceof Checkout) {
                        return response()->json($this->checkoutPayload($this->loadCheckout($serviceCheckout)), 201);
                    }
                }
            } catch (\Throwable) {
                // Fall back to direct persistence while service contracts stabilize.
            }
        }

        $checkout = Checkout::query()->create([
            'store_id' => (int) $store->id,
            'cart_id' => (int) $cart->id,
            'customer_id' => $cart->customer_id,
            'status' => 'started',
            'email' => (string) $validated['email'],
            'shipping_address_json' => null,
            'billing_address_json' => null,
            'shipping_method_id' => null,
            'discount_code' => null,
            'tax_provider_snapshot_json' => null,
            'totals_json' => $this->totalsFromCart($cart, 0, 0),
            'expires_at' => now()->addDay(),
        ]);

        return response()->json($this->checkoutPayload($this->loadCheckout($checkout)), 201);
    }

    public function show(Request $request, int $checkout): JsonResponse
    {
        $foundCheckout = $this->findCheckout($this->currentStoreId($request), $checkout);

        if (! $foundCheckout instanceof Checkout) {
            return response()->json([
                'message' => 'Checkout not found.',
            ], 404);
        }

        if ($this->isExpiredCheckout($foundCheckout)) {
            return response()->json([
                'message' => 'Checkout expired.',
                'error_code' => 'checkout_expired',
            ], 422);
        }

        $shippingMethods = $this->availableShippingMethods(
            (int) $foundCheckout->store_id,
            is_array($foundCheckout->shipping_address_json) ? $foundCheckout->shipping_address_json : null,
        );

        return response()->json($this->checkoutPayload($foundCheckout, $shippingMethods, $this->appliedDiscounts($foundCheckout)));
    }

    public function updateAddress(UpdateCheckoutAddressRequest $request, int $checkout): JsonResponse
    {
        $foundCheckout = $this->findCheckout($this->currentStoreId($request), $checkout);

        if (! $foundCheckout instanceof Checkout) {
            return response()->json([
                'message' => 'Checkout not found.',
            ], 404);
        }

        if ($this->isExpiredCheckout($foundCheckout)) {
            return response()->json([
                'message' => 'Checkout expired.',
                'error_code' => 'checkout_expired',
            ], 422);
        }

        $validated = $request->validated();
        $shippingAddress = isset($validated['shipping_address']) && is_array($validated['shipping_address'])
            ? $validated['shipping_address']
            : null;

        $useShippingAsBilling = (bool) ($validated['use_shipping_as_billing'] ?? true);
        $billingAddress = $useShippingAsBilling
            ? $shippingAddress
            : ((isset($validated['billing_address']) && is_array($validated['billing_address'])) ? $validated['billing_address'] : null);

        if ($this->cartRequiresShipping($foundCheckout) && ! is_array($shippingAddress)) {
            return response()->json([
                'message' => 'The given data was invalid.',
                'errors' => [
                    'shipping_address' => ['Shipping address is required.'],
                ],
            ], 422);
        }

        $service = $this->resolveService('App\\Services\\CheckoutService');

        if ($service !== null && method_exists($service, 'setAddress')) {
            try {
                $service->setAddress($foundCheckout, [
                    'shipping_address' => $shippingAddress,
                    'billing_address' => $billingAddress,
                    'use_shipping_as_billing' => $useShippingAsBilling,
                ]);

                $reloaded = $this->loadCheckout($foundCheckout);
                $shippingMethods = $this->availableShippingMethods(
                    (int) $reloaded->store_id,
                    is_array($reloaded->shipping_address_json) ? $reloaded->shipping_address_json : null,
                );

                return response()->json($this->checkoutPayload($reloaded, $shippingMethods, $this->appliedDiscounts($reloaded)));
            } catch (\Throwable) {
                // Fall back to direct implementation below.
            }
        }

        $foundCheckout->shipping_address_json = $shippingAddress;
        $foundCheckout->billing_address_json = $billingAddress;
        $foundCheckout->status = 'addressed';

        $shippingMethods = $this->availableShippingMethods((int) $foundCheckout->store_id, $shippingAddress);

        if ($this->cartRequiresShipping($foundCheckout) && $shippingMethods === []) {
            return response()->json([
                'message' => 'The given data was invalid.',
                'errors' => [
                    'shipping_address' => ['No shipping methods are available for this address.'],
                ],
            ], 422);
        }

        $discount = $this->currentDiscount($foundCheckout);
        $foundCheckout->totals_json = $this->recalculateTotals($foundCheckout, $discount);
        $foundCheckout->save();

        return response()->json($this->checkoutPayload($this->loadCheckout($foundCheckout), $shippingMethods, $this->appliedDiscounts($foundCheckout)));
    }

    public function selectShippingMethod(SelectCheckoutShippingMethodRequest $request, int $checkout): JsonResponse
    {
        $foundCheckout = $this->findCheckout($this->currentStoreId($request), $checkout);

        if (! $foundCheckout instanceof Checkout) {
            return response()->json([
                'message' => 'Checkout not found.',
            ], 404);
        }

        if ($this->isExpiredCheckout($foundCheckout)) {
            return response()->json([
                'message' => 'Checkout expired.',
                'error_code' => 'checkout_expired',
            ], 422);
        }

        $validated = $request->validated();
        $shippingMethodId = (int) $validated['shipping_method_id'];

        $shippingMethods = $this->availableShippingMethods(
            (int) $foundCheckout->store_id,
            is_array($foundCheckout->shipping_address_json) ? $foundCheckout->shipping_address_json : null,
        );

        $selected = collect($shippingMethods)->firstWhere('id', $shippingMethodId);

        if ($this->cartRequiresShipping($foundCheckout) && ! is_array($selected)) {
            return response()->json([
                'message' => 'The given data was invalid.',
                'errors' => [
                    'shipping_method_id' => ['The selected shipping method is invalid.'],
                ],
            ], 422);
        }

        $service = $this->resolveService('App\\Services\\CheckoutService');

        if ($service !== null && method_exists($service, 'setShippingMethod')) {
            try {
                $service->setShippingMethod($foundCheckout, $shippingMethodId);

                $reloaded = $this->loadCheckout($foundCheckout);

                return response()->json($this->checkoutPayload($reloaded, $shippingMethods, $this->appliedDiscounts($reloaded)));
            } catch (\Throwable) {
                // Fall back to direct implementation below.
            }
        }

        $shippingAmount = is_array($selected)
            ? (int) ($selected['price_amount'] ?? 0)
            : 0;

        $foundCheckout->shipping_method_id = $this->cartRequiresShipping($foundCheckout)
            ? $shippingMethodId
            : null;
        $foundCheckout->status = 'shipping_selected';
        $foundCheckout->totals_json = $this->recalculateTotals($foundCheckout, $this->currentDiscount($foundCheckout), $shippingAmount);
        $foundCheckout->save();

        return response()->json($this->checkoutPayload($this->loadCheckout($foundCheckout), $shippingMethods, $this->appliedDiscounts($foundCheckout)));
    }

    public function selectPaymentMethod(SelectCheckoutPaymentMethodRequest $request, int $checkout): JsonResponse
    {
        $foundCheckout = $this->findCheckout($this->currentStoreId($request), $checkout);

        if (! $foundCheckout instanceof Checkout) {
            return response()->json([
                'message' => 'Checkout not found.',
            ], 404);
        }

        if ($this->isExpiredCheckout($foundCheckout)) {
            return response()->json([
                'message' => 'Checkout expired.',
                'error_code' => 'checkout_expired',
            ], 422);
        }

        if (! in_array((string) $this->enumValue($foundCheckout->status), ['addressed', 'shipping_selected', 'payment_selected'], true)) {
            return response()->json([
                'message' => 'Checkout is not ready for payment selection.',
                'error_code' => 'checkout_invalid_state',
            ], 409);
        }

        $validated = $request->validated();
        $paymentMethod = (string) $validated['payment_method'];

        $service = $this->resolveService('App\\Services\\CheckoutService');

        if ($service !== null && method_exists($service, 'selectPaymentMethod')) {
            try {
                $service->selectPaymentMethod($foundCheckout, $paymentMethod);

                $reloaded = $this->loadCheckout($foundCheckout);

                return response()->json($this->checkoutPayload($reloaded, $this->availableShippingMethods((int) $reloaded->store_id, is_array($reloaded->shipping_address_json) ? $reloaded->shipping_address_json : null), $this->appliedDiscounts($reloaded)));
            } catch (\Throwable) {
                // Fall back to direct implementation below.
            }
        }

        $foundCheckout->payment_method = $paymentMethod;
        $foundCheckout->status = 'payment_selected';
        $foundCheckout->totals_json = $this->recalculateTotals($foundCheckout, $this->currentDiscount($foundCheckout));
        $foundCheckout->save();

        return response()->json($this->checkoutPayload($this->loadCheckout($foundCheckout), $this->availableShippingMethods((int) $foundCheckout->store_id, is_array($foundCheckout->shipping_address_json) ? $foundCheckout->shipping_address_json : null), $this->appliedDiscounts($foundCheckout)));
    }

    public function applyDiscount(ApplyCheckoutDiscountRequest $request, int $checkout): JsonResponse
    {
        $foundCheckout = $this->findCheckout($this->currentStoreId($request), $checkout);

        if (! $foundCheckout instanceof Checkout) {
            return response()->json([
                'message' => 'Checkout not found.',
            ], 404);
        }

        if ($this->isExpiredCheckout($foundCheckout)) {
            return response()->json([
                'message' => 'Checkout expired.',
                'error_code' => 'checkout_expired',
            ], 422);
        }

        $code = (string) $request->validated('code');
        $discount = $this->findDiscountByCode((int) $foundCheckout->store_id, $code);

        if (! $discount instanceof Discount) {
            return response()->json([
                'message' => 'The given data was invalid.',
                'errors' => [
                    'code' => ['The selected discount code is invalid.'],
                ],
            ], 422);
        }

        $foundCheckout->discount_code = $discount->code;
        $foundCheckout->totals_json = $this->recalculateTotals($foundCheckout, $discount);
        $foundCheckout->save();

        $shippingMethods = $this->availableShippingMethods(
            (int) $foundCheckout->store_id,
            is_array($foundCheckout->shipping_address_json) ? $foundCheckout->shipping_address_json : null,
        );

        return response()->json($this->checkoutPayload($this->loadCheckout($foundCheckout), $shippingMethods, $this->appliedDiscounts($foundCheckout)));
    }

    public function removeDiscount(Request $request, int $checkout): JsonResponse
    {
        $foundCheckout = $this->findCheckout($this->currentStoreId($request), $checkout);

        if (! $foundCheckout instanceof Checkout) {
            return response()->json([
                'message' => 'Checkout not found.',
            ], 404);
        }

        if ($this->isExpiredCheckout($foundCheckout)) {
            return response()->json([
                'message' => 'Checkout expired.',
                'error_code' => 'checkout_expired',
            ], 422);
        }

        if (! is_string($foundCheckout->discount_code) || $foundCheckout->discount_code === '') {
            return response()->json([
                'message' => 'Discount not found on checkout.',
            ], 404);
        }

        $foundCheckout->discount_code = null;
        $foundCheckout->totals_json = $this->recalculateTotals($foundCheckout, null);
        $foundCheckout->save();

        $shippingMethods = $this->availableShippingMethods(
            (int) $foundCheckout->store_id,
            is_array($foundCheckout->shipping_address_json) ? $foundCheckout->shipping_address_json : null,


Output:
Chunk ID: 54cb62
Wall time: 0.0515 seconds
Process exited with code 0
Original token count: 1030
Output:
<?php

namespace App\Http\Controllers\Api\Storefront;

use App\Http\Controllers\Api\Concerns\ResolvesApiContext;
use App\Http\Controllers\Controller;
use App\Http\Requests\Storefront\Orders\ShowOrderRequest;
use App\Models\Order;
use App\Models\OrderLine;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Str;

class OrderController extends Controller
{
    use ResolvesApiContext;

    public function show(ShowOrderRequest $request, string $orderNumber): JsonResponse
    {
        $storeId = $this->currentStoreId($request);
        $validated = $request->validated();

        $order = Order::query()
            ->where('store_id', $storeId)
            ->where('order_number', $orderNumber)
            ->with([
                'lines',
                'fulfillments',
            ])
            ->first();

        if (! $order instanceof Order) {
            return response()->json([
                'message' => 'Order not found.',
            ], 404);
        }

        $providedToken = (string) ($validated['token'] ?? '');
        $expectedToken = $this->expectedOrderToken($order);

        if (! hash_equals($expectedToken, $providedToken)) {
            return response()->json([
                'message' => 'The given data was invalid.',
                'errors' => [
                    'token' => ['The provided order token is invalid.'],
                ],
            ], 422);
        }

        $lines = $order->lines->map(function (OrderLine $line): array {
            return [
                'title_snapshot' => (string) $line->title_snapshot,
                'variant_title' => null,
                'sku_snapshot' => $line->sku_snapshot,
                'quantity' => (int) $line->quantity,
                'unit_price_amount' => (int) $line->unit_price_amount,
                'total_amount' => (int) $line->total_amount,
            ];
        })->values()->all();

        $fulfillments = $order->fulfillments->map(function ($fulfillment): array {
            return [
                'id' => (int) $fulfillment->id,
                'status' => (string) $this->enumValue($fulfillment->status),
                'tracking_company' => $fulfillment->tracking_company,
                'tracking_number' => $fulfillment->tracking_number,
                'tracking_url' => $fulfillment->tracking_url,
                'shipped_at' => $this->iso($fulfillment->shipped_at),
                'created_at' => $this->iso($fulfillment->created_at),
            ];
        })->values()->all();

        return response()->json([
            'order_number' => (string) $order->order_number,
            'status' => (string) $this->enumValue($order->status),
            'financial_status' => (string) $this->enumValue($order->financial_status),
            'fulfillment_status' => (string) $this->enumValue($order->fulfillment_status),
            'email' => $order->email,
            'currency' => (string) $order->currency,
            'placed_at' => $this->iso($order->placed_at),
            'lines' => $lines,
            'totals' => [
                'subtotal_amount' => (int) $order->subtotal_amount,
                'discount_amount' => (int) $order->discount_amount,
                'shipping_amount' => (int) $order->shipping_amount,
                'tax_amount' => (int) $order->tax_amount,
                'total_amount' => (int) $order->total_amount,
            ],
            'shipping_address' => is_array($order->shipping_address_json) ? $order->shipping_address_json : null,
            'fulfillments' => $fulfillments,
        ]);
    }

    private function expectedOrderToken(Order $order): string
    {
        $key = (string) config('app.key', '');

        if (Str::startsWith($key, 'base64:')) {
            $decoded = base64_decode(Str::after($key, 'base64:'), true);

            if ($decoded !== false) {
                $key = $decoded;
            }
        }

        return hash_hmac('sha256', implode('|', [
            (string) $order->store_id,
            (string) $order->order_number,
            (string) ($order->email ?? ''),
        ]), $key);
    }
}