rector/docs/how_to_configure_rules.md

How To Configure Rules

Rector rules that implement Rector\Core\Contract\Rector\ConfigurableRectorInterface can be configured.

Typical example is Rector\Renaming\Rector\Name\RenameClassRector:

use Rector\Renaming\Rector\Name\RenameClassRector;
use Rector\Config\RectorConfig;

return static function (RectorConfig $rectorConfig): void {
    $rectorConfig->ruleWithConfiguration(RenameClassRector::class, [
        'App\SomeOldClass' => 'App\SomeNewClass',
    ]);
};