--- /dev/null
+<?php
+
+namespace Drupal\diff\Annotation;
+
+use Drupal\Component\Annotation\Plugin;
+
+/**
+ * Defines a FieldDiffBuilder annotation object.
+ *
+ * Diff builders handle how fields are compared by the diff module.
+ *
+ * Additional annotation keys for diff builders can be defined in
+ * hook_field_diff_builder_info_alter().
+ *
+ * @Annotation
+ *
+ * @see \Drupal\diff\FieldDiffBuilderPluginManager
+ * @see \Drupal\diff\FieldDiffBuilderInterface
+ */
+class FieldDiffBuilder extends Plugin {
+
+ /**
+ * The plugin ID.
+ *
+ * @var string
+ */
+ public $id;
+
+ /**
+ * The human-readable name of the diff builder.
+ *
+ * @var \Drupal\Core\Annotation\Translation
+ *
+ * @ingroup plugin_translatable
+ */
+ public $label;
+
+ /**
+ * An array of field types the diff builder supports.
+ *
+ * @var array
+ */
+ public $field_types = [];
+
+ /**
+ * The weight of the plugin that defines its importance when applied.
+ *
+ * @var int
+ */
+ public $weight = 0;
+}