autocde2.0/app/Http/Requests/API/Task/BatchCreateRequest.php

<?php

namespace App\Http\Requests\API\Task;

use App\Http\Requests\RuleHelper;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class BatchCreateRequest extends FormRequest
{
    use RuleHelper;

    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
     */
    public function rules(): array
    {
        return [
            'project_id' => [
                'required',
                Rule::exists('projects', 'id')->where($this->userCompanyWhere()),
            ],
            'items' => [
                'required', 'array'
            ]
        ];
    }
}