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Configurable

AddInterfaceByTraitRector

Add interface by used trait

-class SomeClass
+class SomeClass implements SomeInterface
 {
     use SomeTrait;
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Transform\Rector\Class_\AddInterfaceByTraitRector;

return RectorConfig::configure()
    ->withConfiguredRule(AddInterfaceByTraitRector::class, [
        'SomeTrait' => 'SomeInterface',
    ]);