POST /api/doctypes/doctypes
{
  "name": "Customer",
  "label": "Customer Management", 
  "description": "CRM system",
  "fields": [
    {
      "fieldname": "first_name",
      "label": "First Name",
      "fieldtype": "text",
      "required": true,
      "in_list_view": true
    },
    {
      "fieldname": "status", 
      "label": "Status",
      "fieldtype": "select",
      "options": "Active\nInactive",
      "required": true
    }
  ]
}

GET /api/doctypes/doctypes/Customer/schema
{
  "data": {
    "doctype": "Customer",
    "title": "Customer Management",
    "fields": [
      {
        "name": "first_name",
        "label": "First Name", 
        "type": "text",
        "required": true
      }
    ]
  }
}

POST /api/doctypes/doctypes/Customer/generate
{
  "types": ["model", "controller", "request", "resource", "migration"],
  "force": false
}

// Generated: app/Models/Customer.php
class Customer extends Model {
    protected $fillable = ['first_name', 'last_name', 'email', 'status'];
    
    protected $casts = [
        'is_active' => 'boolean',
        'metadata' => 'array'
    ];
}

// Generated: app/Http/Controllers/CustomerController.php  
class CustomerController extends Controller {
    public function index() { /* ... */ }
    public function store(CustomerRequest $request) { /* ... */ }
    public function show(Customer $customer) { /* ... */ }
    // ... complete CRUD operations
}

// In your DocType definition
$doctype->addField([
    'fieldname' => 'email',
    'fieldtype' => 'email', 
    'validation' => [
        'rules' => 'required|email|unique:customers,email',
        'messages' => [
            'email.unique' => 'This email is already registered'
        ]
    ]
]);

// Define relationships in field metadata
$doctype->addField([
    'fieldname' => 'category_id',
    'fieldtype' => 'select',
    'relationship' => [
        'model' => 'App\\Models\\Category',
        'type' => 'belongsTo',
        'display' => 'name'
    ]
]);