diff --git a/.gitignore b/.gitignore
index e5cbb64..795777b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,35 @@ google-services.json
# Android Profiling
*.hprof
+
+# .NET build outputs
+bin/
+obj/
+
+# Visual Studio / Rider
+.vs/
+.idea/
+*.user
+*.suo
+*.userprefs
+*.sln.docstates
+
+# Build results
+[Dd]ebug/
+[Rr]elease/
+x64/
+x86/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+
+# Visual Studio cache/options
+.vs/
+.vscode/
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
diff --git a/App.axaml b/App.axaml
new file mode 100644
index 0000000..8138784
--- /dev/null
+++ b/App.axaml
@@ -0,0 +1,15 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/App.axaml.cs b/App.axaml.cs
new file mode 100644
index 0000000..b40f4e5
--- /dev/null
+++ b/App.axaml.cs
@@ -0,0 +1,47 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Data.Core;
+using Avalonia.Data.Core.Plugins;
+using System.Linq;
+using Avalonia.Markup.Xaml;
+using BackSafe.ViewModels;
+using BackSafe.Views;
+
+namespace BackSafe;
+
+public partial class App : Application
+{
+ public override void Initialize()
+ {
+ AvaloniaXamlLoader.Load(this);
+ }
+
+ public override void OnFrameworkInitializationCompleted()
+ {
+ if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+ {
+ // Avoid duplicate validations from both Avalonia and the CommunityToolkit.
+ // More info: https://docs.avaloniaui.net/docs/guides/development-guides/data-validation#manage-validationplugins
+ DisableAvaloniaDataAnnotationValidation();
+ desktop.MainWindow = new MainWindow
+ {
+ DataContext = new MainWindowViewModel(),
+ };
+ }
+
+ base.OnFrameworkInitializationCompleted();
+ }
+
+ private void DisableAvaloniaDataAnnotationValidation()
+ {
+ // Get an array of plugins to remove
+ var dataValidationPluginsToRemove =
+ BindingPlugins.DataValidators.OfType().ToArray();
+
+ // remove each entry found
+ foreach (var plugin in dataValidationPluginsToRemove)
+ {
+ BindingPlugins.DataValidators.Remove(plugin);
+ }
+ }
+}
\ No newline at end of file
diff --git a/Assets/avalonia-logo.ico b/Assets/avalonia-logo.ico
new file mode 100644
index 0000000..f7da8bb
Binary files /dev/null and b/Assets/avalonia-logo.ico differ
diff --git a/BackSafe.csproj b/BackSafe.csproj
new file mode 100644
index 0000000..81ddcad
--- /dev/null
+++ b/BackSafe.csproj
@@ -0,0 +1,29 @@
+
+
+ WinExe
+ net8.0
+ enable
+ true
+ app.manifest
+ true
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ None
+ All
+
+
+
+
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..3173843
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,58 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+BackSafe is a cross-platform desktop application for backing up data from mobile phones (primarily Android, with photos/videos support on iOS/iPadOS) using a user-provided API key. Built with Avalonia UI and .NET 8, targeting Windows, macOS, and Linux.
+
+## Development Commands
+
+### Build and Run
+```bash
+dotnet build # Build the project
+dotnet run # Run the application
+dotnet build -c Release # Build for release
+```
+
+### Debugging
+- Avalonia diagnostics are enabled in Debug builds only (BackSafe.csproj:22-25)
+- Use F12 or Ctrl+F12 within the running application to access DevTools in Debug mode
+
+## Architecture
+
+### UI Framework: Avalonia UI
+- Uses AXAML (Avalonia XAML) for UI definitions
+- Fluent theme is the default (App.axaml:13)
+- Compiled bindings enabled by default (BackSafe.csproj:8)
+
+### MVVM Pattern
+- **ViewModels**: Inherit from `ViewModelBase` (extends `ObservableObject` from CommunityToolkit.Mvvm)
+- **Views**: Located in `Views/` directory, defined with `.axaml` files and code-behind `.axaml.cs`
+- **ViewLocator**: Automatically maps ViewModels to Views by naming convention (ViewModel → View)
+ - Example: `MainWindowViewModel` → `MainWindow`
+ - Implementation in ViewLocator.cs:16
+
+### Application Entry Point
+- `Program.cs`: Standard .NET entry point
+ - Configures Avalonia with platform detection, Inter font, and trace logging
+- `App.axaml.cs`: Avalonia initialization
+ - Disables Avalonia's DataAnnotation validation to avoid conflicts with CommunityToolkit (App.axaml.cs:35-46)
+ - Sets MainWindow with MainWindowViewModel as DataContext
+
+### Key Dependencies
+- **Avalonia 11.3.6**: Cross-platform UI framework
+- **CommunityToolkit.Mvvm 8.2.1**: MVVM helpers (ObservableObject, commands, etc.)
+- **Avalonia.Fonts.Inter**: Default font package
+
+### Project Structure
+- `ViewModels/`: Contains all ViewModel classes
+- `Views/`: Contains AXAML view definitions and code-behind
+- `Models/`: Placeholder directory for data models
+- `Assets/`: Application resources (icons, etc.)
+- `app.manifest`: Windows application manifest
+
+## MVVM Conventions
+- ViewModels use partial classes to support MVVM Toolkit source generators
+- Properties in ViewModels should use `[ObservableProperty]` attribute for automatic INotifyPropertyChanged implementation
+- Views use `x:DataType` for compiled bindings (see MainWindow.axaml:8)
diff --git a/Program.cs b/Program.cs
new file mode 100644
index 0000000..7951d3b
--- /dev/null
+++ b/Program.cs
@@ -0,0 +1,21 @@
+using Avalonia;
+using System;
+
+namespace BackSafe;
+
+sealed class Program
+{
+ // Initialization code. Don't use any Avalonia, third-party APIs or any
+ // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
+ // yet and stuff might break.
+ [STAThread]
+ public static void Main(string[] args) => BuildAvaloniaApp()
+ .StartWithClassicDesktopLifetime(args);
+
+ // Avalonia configuration, don't remove; also used by visual designer.
+ public static AppBuilder BuildAvaloniaApp()
+ => AppBuilder.Configure()
+ .UsePlatformDetect()
+ .WithInterFont()
+ .LogToTrace();
+}
diff --git a/ViewLocator.cs b/ViewLocator.cs
new file mode 100644
index 0000000..5ce19be
--- /dev/null
+++ b/ViewLocator.cs
@@ -0,0 +1,31 @@
+using System;
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using BackSafe.ViewModels;
+
+namespace BackSafe;
+
+public class ViewLocator : IDataTemplate
+{
+
+ public Control? Build(object? param)
+ {
+ if (param is null)
+ return null;
+
+ var name = param.GetType().FullName!.Replace("ViewModel", "View", StringComparison.Ordinal);
+ var type = Type.GetType(name);
+
+ if (type != null)
+ {
+ return (Control)Activator.CreateInstance(type)!;
+ }
+
+ return new TextBlock { Text = "Not Found: " + name };
+ }
+
+ public bool Match(object? data)
+ {
+ return data is ViewModelBase;
+ }
+}
diff --git a/ViewModels/MainWindowViewModel.cs b/ViewModels/MainWindowViewModel.cs
new file mode 100644
index 0000000..5fbe926
--- /dev/null
+++ b/ViewModels/MainWindowViewModel.cs
@@ -0,0 +1,6 @@
+namespace BackSafe.ViewModels;
+
+public partial class MainWindowViewModel : ViewModelBase
+{
+ public string Greeting { get; } = "Welcome to Avalonia!";
+}
diff --git a/ViewModels/ViewModelBase.cs b/ViewModels/ViewModelBase.cs
new file mode 100644
index 0000000..b66f4f5
--- /dev/null
+++ b/ViewModels/ViewModelBase.cs
@@ -0,0 +1,7 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace BackSafe.ViewModels;
+
+public class ViewModelBase : ObservableObject
+{
+}
diff --git a/Views/MainWindow.axaml b/Views/MainWindow.axaml
new file mode 100644
index 0000000..343c9d6
--- /dev/null
+++ b/Views/MainWindow.axaml
@@ -0,0 +1,20 @@
+
+
+
+
+
+
+
+
+
+
diff --git a/Views/MainWindow.axaml.cs b/Views/MainWindow.axaml.cs
new file mode 100644
index 0000000..17b0ce1
--- /dev/null
+++ b/Views/MainWindow.axaml.cs
@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace BackSafe.Views;
+
+public partial class MainWindow : Window
+{
+ public MainWindow()
+ {
+ InitializeComponent();
+ }
+}
\ No newline at end of file
diff --git a/app.manifest b/app.manifest
new file mode 100644
index 0000000..e176433
--- /dev/null
+++ b/app.manifest
@@ -0,0 +1,18 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/backsafe.sln b/backsafe.sln
new file mode 100644
index 0000000..4a2d360
--- /dev/null
+++ b/backsafe.sln
@@ -0,0 +1,24 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.2.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BackSafe", "BackSafe.csproj", "{167A4AD4-4F11-F7F9-E8AC-6D41338AF814}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {167A4AD4-4F11-F7F9-E8AC-6D41338AF814}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {167A4AD4-4F11-F7F9-E8AC-6D41338AF814}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {167A4AD4-4F11-F7F9-E8AC-6D41338AF814}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {167A4AD4-4F11-F7F9-E8AC-6D41338AF814}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {BC0EECAB-90E8-450F-BBB1-AF85D5BD3409}
+ EndGlobalSection
+EndGlobal