copy from github

Editor/Jovian.SaveSystem.Editor.asmdef

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+{
+    "name": "Jovian.SaveSystem.Editor",
+    "rootNamespace": "Jovian.SaveSystem.Editor",
+    "references": [
+        "Jovian.SaveSystem"
+    ],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

Editor/Jovian.SaveSystem.Editor.asmdef.meta

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+fileFormatVersion: 2
+guid: bbc94d83b5c0e8c4c8c529cc64c94ddf
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Editor/SaveSystemSettingsProvider.cs

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+using System.Collections.Generic;
+using UnityEditor;
+
+namespace Jovian.SaveSystem.Editor {
+    public sealed class SaveSystemSettingsProvider : SettingsProvider {
+        private SaveSystemSettings settings;
+        private SerializedObject serializedSettings;
+
+        private SaveSystemSettingsProvider(string path, SettingsScope scope)
+            : base(path, scope) { }
+
+        public override void OnActivate(string searchContext, UnityEngine.UIElements.VisualElement rootElement) {
+            settings = SaveSystemSettings.Load();
+        }
+
+        public override void OnGUI(string searchContext) {
+            EditorGUILayout.Space(10);
+            EditorGUILayout.LabelField("Save System Settings", EditorStyles.boldLabel);
+            EditorGUILayout.Space(5);
+
+            EditorGUI.BeginChangeCheck();
+
+            settings.saveFormat = (SaveFormat)EditorGUILayout.EnumPopup("Save Format", settings.saveFormat);
+            settings.maxAutoSavesPerSession = EditorGUILayout.IntSlider("Max Auto Saves Per Session", settings.maxAutoSavesPerSession, 1, 10);
+            settings.currentSaveVersion = EditorGUILayout.IntField("Current Save Version", settings.currentSaveVersion);
+            settings.saveDirectoryName = EditorGUILayout.TextField("Save Directory Name", settings.saveDirectoryName);
+
+            EditorGUILayout.Space(10);
+            EditorGUILayout.LabelField("Binary Obfuscation", EditorStyles.boldLabel);
+            settings.obfuscationKey = EditorGUILayout.TextField("Obfuscation Key", settings.obfuscationKey);
+
+            if(settings.saveFormat == SaveFormat.Json) {
+                EditorGUILayout.HelpBox("JSON format is human-readable and suitable for development. Switch to Binary for release builds.", MessageType.Info);
+            }
+
+            if(EditorGUI.EndChangeCheck()) {
+                settings.Save();
+            }
+        }
+
+        [SettingsProvider]
+        public static SettingsProvider CreateProvider() {
+            SaveSystemSettingsProvider provider = new SaveSystemSettingsProvider("Project/Jovian/Save System", SettingsScope.Project) {
+                keywords = new HashSet<string>(new[] { "save", "persistence", "serialization", "binary", "json" })
+            };
+            return provider;
+        }
+    }
+}

Editor/SaveSystemSettingsProvider.cs.meta

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+fileFormatVersion: 2
+guid: 34f9753365e282e4f8c610df1cc61e28