Base validator

SceneValidator & AssetValidator of objects that implement IValidatable.

Editor/Validators/AssetValidator.cs

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+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+
+namespace Validator.Editor
+{
+	public class AssetValidator : IValidator
+	{
+		public Report Validate()
+		{
+			Report reporter = new Report("AssetValidator");
+
+			List<Object> objects = FindAssetsByType<Object>();
+			for (int i = 0; i < objects.Count; i++)
+			{
+				EditorUtility.DisplayProgressBar("AssetValidator", "Validate...", (float)i / objects.Count);
+				if (objects[i] is IValidatable validatable)
+				{
+					validatable.Validate(reporter);
+				}
+			}
+			EditorUtility.ClearProgressBar();
+
+			return reporter;
+		}
+
+		public static List<T> FindAssetsByType<T>() where T : Object
+		{
+			List<T> assets = new List<T>();
+			string[] guids = AssetDatabase.FindAssets(string.Format("t:{0}", typeof(T)));
+
+			for (int i = 0; i < guids.Length; i++)
+			{
+				EditorUtility.DisplayProgressBar("AssetValidator", "FindAssetsByType...", (float)i / guids.Length);
+
+				string assetPath = AssetDatabase.GUIDToAssetPath(guids[i]);
+				T asset = AssetDatabase.LoadAssetAtPath<T>(assetPath);
+				if (asset != null)
+				{
+					assets.Add(asset);
+				}
+			}
+			EditorUtility.ClearProgressBar();
+
+			return assets;
+		}
+	}
+}

Editor/Validators/AssetValidator.cs.meta

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+MonoImporter:
+  externalObjects: {}
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Editor/Validators/SceneValidator.cs

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+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace Validator.Editor
+{
+	public class SceneValidator : IValidator
+	{
+		public Report Validate()
+		{
+            Report report = new Report("SceneValidator");
+
+            List<IValidatable> objects = FindAllObjectsOfType<IValidatable>();
+			for (int i = 0; i < objects.Count; i++)
+			{
+                EditorUtility.DisplayProgressBar("SceneValidator", "Validate...", (float)i / objects.Count);
+
+                objects[i].Validate(report);
+            }
+            EditorUtility.ClearProgressBar();
+
+            return report;
+		}
+
+        private static List<GameObject> GetAllRootGameObjects()
+        {
+            List<GameObject> gameObjects = new List<GameObject>();
+
+            for (int i = 0; i < SceneManager.sceneCount; i++)
+            {
+                EditorUtility.DisplayProgressBar("SceneValidator", "GetAllRootGameObjects...", (float)i / SceneManager.sceneCount);
+                gameObjects.AddRange(SceneManager.GetSceneAt(i).GetRootGameObjects());
+            }
+            EditorUtility.ClearProgressBar();
+
+            return gameObjects;
+        }
+
+        private static List<T> FindAllObjectsOfType<T>()
+        {
+            List<T> objects = new List<T>();
+
+            List<GameObject> gameObjects = GetAllRootGameObjects();
+			for (int i = 0; i < gameObjects.Count; i++)
+			{
+                EditorUtility.DisplayProgressBar("SceneValidator", "FindAllObjectsOfType...", (float)i / gameObjects.Count);
+                objects.AddRange(gameObjects[i].GetComponentsInChildren<T>(true));
+			}
+            EditorUtility.ClearProgressBar();
+
+            return objects;
+        }
+    }
+}

Editor/Validators/SceneValidator.cs.meta

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