diff --git a/Packages/TempestasPresentation/Sources/TempestasPresentation/TempestasPresentation.swift b/Packages/TempestasPresentation/Sources/TempestasPresentation/TempestasPresentation.swift
deleted file mode 100644
index 08b22b8..0000000
--- a/Packages/TempestasPresentation/Sources/TempestasPresentation/TempestasPresentation.swift
+++ /dev/null
@@ -1,2 +0,0 @@
-// The Swift Programming Language
-// https://docs.swift.org/swift-book
diff --git a/Packages/TempestasPresentation/Sources/TempestasPresentation/ViewModels/MainViewModel.swift b/Packages/TempestasPresentation/Sources/TempestasPresentation/ViewModels/MainViewModel.swift
new file mode 100644
index 0000000..3c9f59c
--- /dev/null
+++ b/Packages/TempestasPresentation/Sources/TempestasPresentation/ViewModels/MainViewModel.swift
@@ -0,0 +1,17 @@
+import Foundation
+import Observation
+import TempestasDomain
+
+@Observable
+@MainActor
+public final class MainViewModel {
+    public private(set) var isLoading: Bool = false
+
+    private let forecastRepository: ForecastRepository
+
+    public init(
+        forecastRepository: ForecastRepository
+    ) {
+        self.forecastRepository = forecastRepository
+    }
+}
diff --git a/Packages/TempestasPresentation/Sources/TempestasPresentation/Views/MainView.swift b/Packages/TempestasPresentation/Sources/TempestasPresentation/Views/MainView.swift
new file mode 100644
index 0000000..9ac3366
--- /dev/null
+++ b/Packages/TempestasPresentation/Sources/TempestasPresentation/Views/MainView.swift
@@ -0,0 +1,17 @@
+import SwiftUI
+
+public struct MainView: View {
+    let viewModel: MainViewModel
+    
+    public init (
+        viewModel: MainViewModel
+    ) {
+        self.viewModel = viewModel
+    }
+    
+    public var body: some View {
+        NavigationStack {
+            
+        }.frame(width: 320, height: 400)
+    }
+}
diff --git a/Tempestas/AppComposition.swift b/Tempestas/AppComposition.swift
index 404f55d..dbd6174 100644
--- a/Tempestas/AppComposition.swift
+++ b/Tempestas/AppComposition.swift
@@ -13,4 +13,10 @@ final class AppComposition {
         
         self.forecastRepository = forecastRepository
     }
+
+    func makeMainViewModel() -> MainViewModel {
+        MainViewModel(
+            forecastRepository: forecastRepository
+        )
+    }
 }
diff --git a/Tempestas/ContentView.swift b/Tempestas/ContentView.swift
deleted file mode 100644
index 2b3700f..0000000
--- a/Tempestas/ContentView.swift
+++ /dev/null
@@ -1,59 +0,0 @@
-//
-//  ContentView.swift
-//  Tempestas
-//
-//  Created by Alan Brault on 8/4/26.
-//
-
-import SwiftUI
-import SwiftData
-
-struct ContentView: View {
-    @Environment(\.modelContext) private var modelContext
-    @Query private var items: [Item]
-
-    var body: some View {
-        NavigationSplitView {
-            List {
-                ForEach(items) { item in
-                    NavigationLink {
-                        Text("Item at \(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))")
-                    } label: {
-                        Text(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))
-                    }
-                }
-                .onDelete(perform: deleteItems)
-            }
-            .navigationSplitViewColumnWidth(min: 180, ideal: 200)
-            .toolbar {
-                ToolbarItem {
-                    Button(action: addItem) {
-                        Label("Add Item", systemImage: "plus")
-                    }
-                }
-            }
-        } detail: {
-            Text("Select an item")
-        }
-    }
-
-    private func addItem() {
-        withAnimation {
-            let newItem = Item(timestamp: Date())
-            modelContext.insert(newItem)
-        }
-    }
-
-    private func deleteItems(offsets: IndexSet) {
-        withAnimation {
-            for index in offsets {
-                modelContext.delete(items[index])
-            }
-        }
-    }
-}
-
-#Preview {
-    ContentView()
-        .modelContainer(for: Item.self, inMemory: true)
-}
diff --git a/Tempestas/Item.swift b/Tempestas/Item.swift
deleted file mode 100644
index 92689ef..0000000
--- a/Tempestas/Item.swift
+++ /dev/null
@@ -1,18 +0,0 @@
-//
-//  Item.swift
-//  Tempestas
-//
-//  Created by Alan Brault on 8/4/26.
-//
-
-import Foundation
-import SwiftData
-
-@Model
-final class Item {
-    var timestamp: Date
-    
-    init(timestamp: Date) {
-        self.timestamp = timestamp
-    }
-}
diff --git a/Tempestas/TempestasApp.swift b/Tempestas/TempestasApp.swift
index da1d6b1..b75da7e 100644
--- a/Tempestas/TempestasApp.swift
+++ b/Tempestas/TempestasApp.swift
@@ -1,38 +1,24 @@
-//
-//  TempestasApp.swift
-//  Tempestas
-//
-//  Created by Alan Brault on 8/4/26.
-//
-
 import SwiftUI
 import SwiftData
+import TempestasPresentation
 
 @main
 struct TempestasApp: App {
     private let composition: AppComposition
+    @State private var mainViewModel: MainViewModel
     
     init() {
         self.composition = AppComposition()
+        
+        _mainViewModel = State(initialValue: composition.makeMainViewModel())
     }
-    
-    var sharedModelContainer: ModelContainer = {
-        let schema = Schema([
-            Item.self,
-        ])
-        let modelConfiguration = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false)
-
-        do {
-            return try ModelContainer(for: schema, configurations: [modelConfiguration])
-        } catch {
-            fatalError("Could not create ModelContainer: \(error)")
-        }
-    }()
 
     var body: some Scene {
-        WindowGroup {
-            ContentView()
+        MenuBarExtra("Tempestas", systemImage: "cloud.sun") {
+            MainView(
+                viewModel: mainViewModel
+            )
         }
-        .modelContainer(sharedModelContainer)
+        .menuBarExtraStyle(.window)
     }
 }