First step, add a CoreData Stack in Helpers and create the

context in APSManager.

This builds and runs in simulator ... step 1

Core_Data.xcdatamodeld/Core_Data.xcdatamodel/contents

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="21513" systemVersion="22D5027d" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier=""/>

FreeAPS.xcodeproj/project.pbxproj

@@ -338,6 +338,8 @@
 		FE41E4D429463C660047FD55 /* NightscoutStatistics.swift in Sources */ = {isa = PBXBuildFile; fileRef = FE41E4D329463C660047FD55 /* NightscoutStatistics.swift */; };
 		FE41E4D629463EE20047FD55 /* NightscoutPreferences.swift in Sources */ = {isa = PBXBuildFile; fileRef = FE41E4D529463EE20047FD55 /* NightscoutPreferences.swift */; };
 		FE66D16B291F74F8005D6F77 /* Bundle+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = FE66D16A291F74F8005D6F77 /* Bundle+Extensions.swift */; };
+		FEFA5C0F299F810B00765C17 /* Core_Data.xcdatamodeld in Sources */ = {isa = PBXBuildFile; fileRef = FEFA5C0D299F810B00765C17 /* Core_Data.xcdatamodeld */; };
+		FEFA5C11299F814A00765C17 /* CoreDataStack.swift in Sources */ = {isa = PBXBuildFile; fileRef = FEFA5C10299F814A00765C17 /* CoreDataStack.swift */; };
 		FEFFA7A22929FE49007B8193 /* UIDevice+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = FEFFA7A12929FE49007B8193 /* UIDevice+Extensions.swift */; };
 /* End PBXBuildFile section */
 
@@ -769,6 +771,8 @@
 		FE41E4D329463C660047FD55 /* NightscoutStatistics.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NightscoutStatistics.swift; sourceTree = "<group>"; };
 		FE41E4D529463EE20047FD55 /* NightscoutPreferences.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NightscoutPreferences.swift; sourceTree = "<group>"; };
 		FE66D16A291F74F8005D6F77 /* Bundle+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Bundle+Extensions.swift"; sourceTree = "<group>"; };
+		FEFA5C0E299F810B00765C17 /* Core_Data.xcdatamodel */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcdatamodel; path = Core_Data.xcdatamodel; sourceTree = "<group>"; };
+		FEFA5C10299F814A00765C17 /* CoreDataStack.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CoreDataStack.swift; sourceTree = "<group>"; };
 		FEFFA7A12929FE49007B8193 /* UIDevice+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIDevice+Extensions.swift"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -1270,6 +1274,7 @@
 		388E594F25AD948C0019842D = {
 			isa = PBXGroup;
 			children = (
+				FEFA5C0D299F810B00765C17 /* Core_Data.xcdatamodeld */,
 				38F3783A2613555C009DB701 /* Config.xcconfig */,
 				3818AA42274BBC1100843DB3 /* ConfigOverride.xcconfig */,
 				388E595A25AD948C0019842D /* FreeAPS */,
@@ -1357,6 +1362,7 @@
 		388E5A5A25B6F05F0019842D /* Helpers */ = {
 			isa = PBXGroup;
 			children = (
+				FEFA5C10299F814A00765C17 /* CoreDataStack.swift */,
 				38F37827261260DC009DB701 /* Color+Extensions.swift */,
 				389ECE042601144100D86C4F /* ConcurrentMap.swift */,
 				38192E0C261BAF980094D973 /* ConvenienceExtensions.swift */,
@@ -2286,6 +2292,7 @@
 				38A9260525F012D8009E3739 /* CarbRatios.swift in Sources */,
 				38FCF3D625E8FDF40078B0D1 /* MD5.swift in Sources */,
 				3871F39C25ED892B0013ECB5 /* TempTarget.swift in Sources */,
+				FEFA5C11299F814A00765C17 /* CoreDataStack.swift in Sources */,
 				3811DEAB25C9D88300A708ED /* HTTPResponseStatus.swift in Sources */,
 				3811DE5F25C9D4D500A708ED /* ProgressBar.swift in Sources */,
 				38E87408274F9AD000975559 /* UserNotificationsManager.swift in Sources */,
@@ -2357,6 +2364,7 @@
 				1BBB001DAD60F3B8CEA4B1C7 /* ISFEditorStateModel.swift in Sources */,
 				F816826028DB441800054060 /* BluetoothTransmitter.swift in Sources */,
 				38192E0D261BAF980094D973 /* ConvenienceExtensions.swift in Sources */,
+				FEFA5C0F299F810B00765C17 /* Core_Data.xcdatamodeld in Sources */,
 				88AB39B23C9552BD6E0C9461 /* ISFEditorRootView.swift in Sources */,
 				F816825E28DB441200054060 /* HeartBeatManager.swift in Sources */,
 				38FEF413273B317A00574A46 /* HKUnit.swift in Sources */,
@@ -3060,6 +3068,19 @@
 			productName = SwiftCharts;
 		};
 /* End XCSwiftPackageProductDependency section */
+
+/* Begin XCVersionGroup section */
+		FEFA5C0D299F810B00765C17 /* Core_Data.xcdatamodeld */ = {
+			isa = XCVersionGroup;
+			children = (
+				FEFA5C0E299F810B00765C17 /* Core_Data.xcdatamodel */,
+			);
+			currentVersion = FEFA5C0E299F810B00765C17 /* Core_Data.xcdatamodel */;
+			path = Core_Data.xcdatamodeld;
+			sourceTree = "<group>";
+			versionGroupType = wrapper.xcdatamodel;
+		};
+/* End XCVersionGroup section */
 	};
 	rootObject = 388E595025AD948C0019842D /* Project object */;
 }

FreeAPS.xcworkspace/contents.xcworkspacedata

@@ -2,6 +2,9 @@
 <Workspace
    version = "1.0">
    <FileRef
+      location = "group:FreeAPS/Sources/Helpers/CoreDataStack.swift">
+   </FileRef>
+   <FileRef
       location = "group:FreeAPS.xcodeproj">
    </FileRef>
    <FileRef

FreeAPS/Sources/APS/APSManager.swift

@@ -1,5 +1,6 @@
 import Accelerate
 import Combine
+import CoreData
 import Foundation
 import LoopKit
 import LoopKitUI
@@ -79,6 +80,8 @@ final class BaseAPSManager: APSManager, Injectable {
         }
     }
 
+    let coredataContext = CoreDataStack.shared.persistentContainer.viewContext
+
     private var openAPS: OpenAPS!
 
     private var lifetime = Lifetime()

FreeAPS/Sources/Helpers/CoreDataStack.swift

@@ -0,0 +1,19 @@
+import CoreData
+import Foundation
+
+class CoreDataStack {
+    private init() {}
+
+    static let shared = CoreDataStack()
+
+    lazy var persistentContainer: NSPersistentContainer = {
+        let container = NSPersistentContainer(name: "Core_Data")
+
+        container.loadPersistentStores(completionHandler: { _, error in
+            guard let error = error as NSError? else { return }
+            fatalError("Unresolved error: \(error), \(error.userInfo)")
+        })
+
+        return container
+    }()
+}