Signed-off-by: Matt Bruce <mbrucedogs@gmail.com>

README.md

@@ -31,6 +31,14 @@ The project also includes a watchOS companion app target for watch-specific demo
 ## Project Structure
 
 ```
+SharedPackage/
+├── Package.swift
+└── Sources/
+    └── SharedKit/
+        ├── Constants/
+        │   └── StorageKeyNames.swift
+        └── Models/
+            └── UserProfile.swift
 SecureStorgageSample/
 ├── ContentView.swift        # Tabbed navigation
 ├── StorageKeys.swift        # 12 example key definitions
@@ -77,6 +85,7 @@ The app demonstrates various storage configurations:
 ## Dependencies
 
 - [LocalData](../localPackages/LocalData) - Local package for typed secure storage
+- SharedKit - Local package for shared iOS/watch models and constants
 
 ## License
 

SecureStorageSample Watch App/ContentView.swift

@@ -6,13 +6,14 @@
 //
 
 import SwiftUI
+import SharedKit
 
 struct ContentView: View {
-    @State private var connectivity = WatchConnectivityService.shared
+    @State private var store = WatchProfileStore.shared
 
     var body: some View {
         VStack {
-            if let profile = connectivity.profile {
+            if let profile = store.profile {
                 Text(profile.name)
                     .bold()
                 Text(profile.email)
@@ -30,8 +31,8 @@ struct ContentView: View {
                     .foregroundStyle(.secondary)
             }
 
-            if !connectivity.statusMessage.isEmpty {
-                Text(connectivity.statusMessage)
+            if !store.statusMessage.isEmpty {
+                Text(store.statusMessage)
                     .font(.caption2)
                     .foregroundStyle(.secondary)
             }

SecureStorageSample Watch App/Models/UserProfile.swift

@@ -1,15 +0,0 @@
-import Foundation
-
-nonisolated(unsafe)
-struct UserProfile: Codable, Sendable {
-    static let storageKeyName = "user_profile.json"
-
-    let name: String
-    let email: String
-    let age: Int?
-    let createdAt: Date
-
-    var ageDescription: String {
-        age.map(String.init) ?? "n/a"
-    }
-}

SecureStorageSample Watch App/Protocols/WatchDataHandling.swift

@@ -0,0 +1,6 @@
+import Foundation
+
+protocol WatchDataHandling {
+    var key: String { get }
+    func handle(data: Data)
+}

SecureStorageSample Watch App/Services/Handlers/UserProfileWatchHandler.swift

@@ -0,0 +1,23 @@
+import Foundation
+import SharedKit
+
+@MainActor
+final class UserProfileWatchHandler: WatchDataHandling {
+    let key = UserProfile.storageKeyName
+
+    private let store: WatchProfileStore
+    private let decoder = JSONDecoder()
+
+    init(store: WatchProfileStore = .shared) {
+        self.store = store
+    }
+
+    func handle(data: Data) {
+        do {
+            let profile = try decoder.decode(UserProfile.self, from: data)
+            store.setProfile(profile)
+        } catch {
+            store.setStatus("Failed to decode profile")
+        }
+    }
+}

SecureStorageSample Watch App/Services/WatchConnectivityService.swift

@@ -1,24 +1,33 @@
 import Foundation
-import Observation
 import WatchConnectivity
 
 @MainActor
-@Observable
 final class WatchConnectivityService: NSObject, WCSessionDelegate {
     static let shared = WatchConnectivityService()
 
-    private(set) var profile: UserProfile?
-    private(set) var statusMessage: String = ""
+    private let store: WatchProfileStore
+    private var handlers: [String: WatchDataHandling] = [:]
 
     private override init() {
+        self.store = .shared
         super.init()
+        registerDefaultHandlers()
         activateIfSupported()
         loadCurrentContext()
     }
 
+    private func registerDefaultHandlers() {
+        let profileHandler = UserProfileWatchHandler(store: store)
+        registerHandler(profileHandler)
+    }
+
+    func registerHandler(_ handler: WatchDataHandling) {
+        handlers[handler.key] = handler
+    }
+
     private func activateIfSupported() {
         guard WCSession.isSupported() else {
-            statusMessage = "WatchConnectivity not supported"
+            store.setStatus("WatchConnectivity not supported")
             return
         }
         let session = WCSession.default
@@ -28,20 +37,13 @@ final class WatchConnectivityService: NSObject, WCSessionDelegate {
 
     private func loadCurrentContext() {
         guard WCSession.isSupported() else { return }
-        updateProfile(from: WCSession.default.applicationContext)
+        handleContext(WCSession.default.applicationContext)
     }
 
-    private func updateProfile(from context: [String: Any]) {
-        guard let data = context[UserProfile.storageKeyName] as? Data else {
-            statusMessage = "No profile received"
-            return
-        }
-
-        do {
-            profile = try JSONDecoder().decode(UserProfile.self, from: data)
-            statusMessage = "Profile synced"
-        } catch {
-            statusMessage = "Failed to decode profile"
+    private func handleContext(_ context: [String: Any]) {
+        for (key, handler) in handlers {
+            guard let data = context[key] as? Data else { continue }
+            handler.handle(data: data)
         }
     }
 
@@ -54,6 +56,6 @@ final class WatchConnectivityService: NSObject, WCSessionDelegate {
     }
 
     func session(_ session: WCSession, didReceiveApplicationContext applicationContext: [String: Any]) {
-        updateProfile(from: applicationContext)
+        handleContext(applicationContext)
     }
 }

SecureStorageSample Watch App/State/WatchProfileStore.swift

@@ -0,0 +1,23 @@
+import Foundation
+import Observation
+import SharedKit
+
+@MainActor
+@Observable
+final class WatchProfileStore {
+    static let shared = WatchProfileStore()
+
+    private(set) var profile: UserProfile?
+    private(set) var statusMessage: String = ""
+
+    private init() {}
+
+    func setProfile(_ profile: UserProfile) {
+        self.profile = profile
+        statusMessage = "Profile synced"
+    }
+
+    func setStatus(_ message: String) {
+        statusMessage = message
+    }
+}

SecureStorgageSample.xcodeproj/project.pbxproj

@@ -209,6 +209,7 @@
 			name = SecureStorgageSample;
 			packageProductDependencies = (
 				EA179D552F17379800B1D54A /* LocalData */,
+				EA65D7312F17DDEB00C48466 /* SharedKit */,
 			);
 			productName = SecureStorgageSample;
 			productReference = EA179D012F1722BB00B1D54A /* SecureStorgageSample.app */;
@@ -232,6 +233,7 @@
 			);
 			name = SecureStorgageSampleTests;
 			packageProductDependencies = (
+				EA65D7312F17DDEB00C48466 /* SharedKit */,
 			);
 			productName = SecureStorgageSampleTests;
 			productReference = EA179D0E2F1722BC00B1D54A /* SecureStorgageSampleTests.xctest */;
@@ -373,6 +375,7 @@
 			minimizedProjectReferenceProxies = 1;
 			packageReferences = (
 				EA179D542F17379800B1D54A /* XCLocalSwiftPackageReference "../localPackages/LocalData" */,
+				EA65D7302F17DDEB00C48466 /* XCLocalSwiftPackageReference "SharedPackage" */,
 			);
 			preferredProjectObjectVersion = 77;
 			productRefGroup = EA179D022F1722BB00B1D54A /* Products */;
@@ -1002,6 +1005,10 @@
 			isa = XCLocalSwiftPackageReference;
 			relativePath = ../localPackages/LocalData;
 		};
+		EA65D7302F17DDEB00C48466 /* XCLocalSwiftPackageReference "SharedPackage" */ = {
+			isa = XCLocalSwiftPackageReference;
+			relativePath = SharedPackage;
+		};
 /* End XCLocalSwiftPackageReference section */
 
 /* Begin XCSwiftPackageProductDependency section */
@@ -1009,6 +1016,10 @@
 			isa = XCSwiftPackageProductDependency;
 			productName = LocalData;
 		};
+		EA65D7312F17DDEB00C48466 /* SharedKit */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = SharedKit;
+		};
 /* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = EA179CF92F1722BB00B1D54A /* Project object */;

SecureStorgageSample.xcodeproj/xcuserdata/mattbruce.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -7,7 +7,7 @@
 		<key>SecureStorageSample Watch App.xcscheme_^#shared#^_</key>
 		<dict>
 			<key>orderHint</key>
-			<integer>2</integer>
+			<integer>3</integer>
 		</dict>
 		<key>SecureStorageWatch Watch App.xcscheme_^#shared#^_</key>
 		<dict>
@@ -17,7 +17,7 @@
 		<key>SecureStorgageSample.xcscheme_^#shared#^_</key>
 		<dict>
 			<key>orderHint</key>
-			<integer>1</integer>
+			<integer>2</integer>
 		</dict>
 		<key>SecureStorgageSampleWatch.xcscheme_^#shared#^_</key>
 		<dict>

SecureStorgageSample/Models/UserProfile.swift

@@ -1,15 +0,0 @@
-import Foundation
-
-nonisolated(unsafe)
-struct UserProfile: Codable, Sendable {
-    static let storageKeyName = "user_profile.json"
-
-    let name: String
-    let email: String
-    let age: Int?
-    let createdAt: Date
-
-    var ageDescription: String {
-        age.map(String.init) ?? "n/a"
-    }
-}

SecureStorgageSample/StorageKeys.swift

@@ -8,18 +8,19 @@
 
 import Foundation
 import LocalData
+import SharedKit
 
 // MARK: - Sample Data Models
 
 /// Simple credential model for keychain storage demo.
-nonisolated(unsafe)
+nonisolated
 struct Credential: Codable, Sendable {
     let username: String
     let password: String
 }
 
 /// Location data model.
-nonisolated(unsafe)
+nonisolated
 struct SampleLocationData: Codable, Sendable {
     let lat: Double
     let lon: Double
@@ -268,4 +269,3 @@ extension StorageKeys {
         let syncPolicy: SyncPolicy = .never
     }
 }
-

SecureStorgageSample/Views/FileSystemDemo.swift

@@ -7,6 +7,7 @@
 
 import SwiftUI
 import LocalData
+import SharedKit
 
 struct FileSystemDemo: View {
     @State private var profileName = ""
@@ -168,28 +169,6 @@ struct FileSystemDemo: View {
     }
 }
 
-extension FileDirectory: Hashable {
-    public func hash(into hasher: inout Hasher) {
-        switch self {
-        case .documents:
-            hasher.combine("documents")
-        case .caches:
-            hasher.combine("caches")
-        case .custom(let url):
-            hasher.combine(url)
-        }
-    }
-    
-    public static func == (lhs: FileDirectory, rhs: FileDirectory) -> Bool {
-        switch (lhs, rhs) {
-        case (.documents, .documents): return true
-        case (.caches, .caches): return true
-        case (.custom(let a), .custom(let b)): return a == b
-        default: return false
-        }
-    }
-}
-
 #Preview {
     NavigationStack {
         FileSystemDemo()

SharedPackage/Package.swift

@@ -0,0 +1,17 @@
+// swift-tools-version: 5.9
+
+import PackageDescription
+
+let package = Package(
+    name: "SharedKit",
+    platforms: [
+        .iOS(.v17),
+        .watchOS(.v10)
+    ],
+    products: [
+        .library(name: "SharedKit", targets: ["SharedKit"])
+    ],
+    targets: [
+        .target(name: "SharedKit")
+    ]
+)

SharedPackage/Sources/SharedKit/Constants/StorageKeyNames.swift

@@ -0,0 +1,5 @@
+import Foundation
+
+public enum StorageKeyNames {
+    public static let userProfile = "user_profile.json"
+}

SharedPackage/Sources/SharedKit/Models/UserProfile.swift

@@ -0,0 +1,14 @@
+import Foundation
+
+public nonisolated struct UserProfile: Codable, Sendable {
+    public static let storageKeyName = StorageKeyNames.userProfile
+
+    public let name: String
+    public let email: String
+    public let age: Int?
+    public let createdAt: Date
+
+    public var ageDescription: String {
+        age.map(String.init) ?? "n/a"
+    }
+}