diff --git a/src/SpatialViewer.App/CadCompatibilityReportBuilder.cs b/src/SpatialViewer.App/CadCompatibilityReportBuilder.cs
new file mode 100644
index 0000000..adef574
--- /dev/null
+++ b/src/SpatialViewer.App/CadCompatibilityReportBuilder.cs
@@ -0,0 +1,224 @@
+using System.Collections.ObjectModel;
+using System.Globalization;
+using System.Text.Json;
+using SpatialViewer.Formats.Cad;
+using SpatialViewer.Formats.Cad.ACadSharp;
+
+namespace SpatialViewer.Product;
+
+internal static class CadCompatibilityReportBuilder
+{
+    public const int SchemaVersion = 1;
+
+    private static readonly string[] SafeDocumentMetadataKeys =
+    [
+        "Reader",
+        "ReaderVersion",
+        "SourceFormat",
+        "CadVersion",
+        "Units",
+        "CustomClassCount",
+        "CustomEntityCount",
+        "CustomProxyGraphicEntityCount",
+        "XiangyuanDetected",
+        "XiangyuanClassCount",
+        "XiangyuanEntityCount",
+        "RawProxyCommandCaptureSupported",
+        "RawProxyCommandCaptureFailed",
+        "RawProxyCommandCapturedEntityCount",
+        "RawProxyCommandMalformedEntityCount",
+        "RawProxyUnknownCommandEntityCount",
+        "RawProxyUnknownCommandCount",
+        "RawProxyUnknownTypeIds"
+    ];
+
+    private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web)
+    {
+        WriteIndented = true
+    };
+
+    public static string Build(CadDocument document)
+    {
+        ArgumentNullException.ThrowIfNull(document);
+
+        var customEntities = EnumerateEntities(document)
+            .OfType<CadCustomEntity>()
+            .ToArray();
+
+        var groups = customEntities
+            .GroupBy(EntityGroupKey.From)
+            .OrderBy(group => group.Key.Vendor, StringComparer.Ordinal)
+            .ThenBy(group => group.Key.ApplicationName, StringComparer.OrdinalIgnoreCase)
+            .ThenBy(group => group.Key.CppClassName, StringComparer.OrdinalIgnoreCase)
+            .ThenBy(group => group.Key.DxfName, StringComparer.OrdinalIgnoreCase)
+            .ThenBy(group => group.Key.SourceEntityType, StringComparer.OrdinalIgnoreCase)
+            .Select(group => BuildGroup(group.Key, group.ToArray()))
+            .ToArray();
+
+        var report = new CadCompatibilityReport(
+            SchemaVersion,
+            DateTimeOffset.UtcNow,
+            AppVersionProvider.Version,
+            typeof(CadDocument).Assembly.GetName().Version?.ToString() ?? "unknown",
+            typeof(ACadSharpCadImporter).Assembly.GetName().Version?.ToString() ?? "unknown",
+            document.SourceFormat,
+            document.Version,
+            document.Units.ToString(),
+            document.CustomClasses.Count,
+            customEntities.Length,
+            FilterMetadata(document.Metadata, SafeDocumentMetadataKeys),
+            groups);
+
+        return JsonSerializer.Serialize(report, JsonOptions);
+    }
+
+    private static CadCompatibilityCustomGroup BuildGroup(
+        EntityGroupKey key,
+        IReadOnlyList<CadCustomEntity> entities)
+    {
+        var primitiveKinds = entities
+            .SelectMany(entity => entity.ProxyGraphicKinds)
+            .Where(value => !string.IsNullOrWhiteSpace(value))
+            .Distinct(StringComparer.Ordinal)
+            .OrderBy(value => value, StringComparer.Ordinal)
+            .ToArray();
+
+        var commandSignatures = DistinctMetadata(entities, "RawProxyCommandTypeSignature");
+        var unknownTypeIds = entities
+            .SelectMany(entity => ParseIntegerList(Metadata(entity, "RawProxyUnknownTypeIds")))
+            .Distinct()
+            .OrderBy(value => value)
+            .ToArray();
+
+        return new(
+            key.DxfName,
+            key.CppClassName,
+            key.ApplicationName,
+            key.SourceEntityType,
+            key.Vendor,
+            key.Representation,
+            entities.Count,
+            primitiveKinds,
+            SumMetadata(entities, "ProxyGraphicCount"),
+            SumMetadata(entities, "ProxyGraphicTranslatedCount"),
+            SumMetadata(entities, "ProxyGraphicUnsupportedCount"),
+            SumMetadata(entities, "RawProxyCommandDeclaredCount"),
+            SumMetadata(entities, "RawProxyCommandScannedCount"),
+            SumMetadata(entities, "RawProxyCommandKnownCount"),
+            SumMetadata(entities, "RawProxyCommandUnknownCount"),
+            entities.Count(entity => MetadataBoolean(entity, "RawProxyCommandMalformed")),
+            entities.Count(entity => MetadataBoolean(entity, "RawProxyCommandTruncated")),
+            unknownTypeIds,
+            commandSignatures);
+    }
+
+    private static IEnumerable<CadEntity> EnumerateEntities(CadDocument document)
+    {
+        foreach (var entity in document.ModelSpace) yield return entity;
+        foreach (var block in document.Blocks)
+            foreach (var entity in block.Entities)
+                yield return entity;
+        foreach (var layout in document.Layouts.Where(layout => layout.IsPaperSpace))
+            foreach (var entity in layout.Entities)
+                yield return entity;
+    }
+
+    private static IReadOnlyDictionary<string, string> FilterMetadata(
+        IReadOnlyDictionary<string, string> source,
+        IEnumerable<string> allowList)
+    {
+        var safe = new SortedDictionary<string, string>(StringComparer.Ordinal);
+        foreach (var key in allowList)
+            if (source.TryGetValue(key, out var value) && !string.IsNullOrWhiteSpace(value))
+                safe[key] = value;
+        return new ReadOnlyDictionary<string, string>(safe);
+    }
+
+    private static string[] DistinctMetadata(
+        IEnumerable<CadCustomEntity> entities,
+        string key)
+        => entities
+            .Select(entity => Metadata(entity, key))
+            .Where(value => !string.IsNullOrWhiteSpace(value))
+            .Distinct(StringComparer.Ordinal)
+            .OrderBy(value => value, StringComparer.Ordinal)
+            .ToArray();
+
+    private static string Metadata(CadCustomEntity entity, string key)
+        => entity.Metadata.TryGetValue(key, out var value) ? value : string.Empty;
+
+    private static bool MetadataBoolean(CadCustomEntity entity, string key)
+        => bool.TryParse(Metadata(entity, key), out var value) && value;
+
+    private static long SumMetadata(
+        IEnumerable<CadCustomEntity> entities,
+        string key)
+    {
+        long sum = 0;
+        foreach (var entity in entities)
+            if (long.TryParse(Metadata(entity, key), NumberStyles.Integer, CultureInfo.InvariantCulture, out var value) && value > 0)
+                sum = checked(sum + value);
+        return sum;
+    }
+
+    private static IEnumerable<int> ParseIntegerList(string raw)
+    {
+        if (string.IsNullOrWhiteSpace(raw)) yield break;
+        foreach (var token in raw.Split(';', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+            if (int.TryParse(token, NumberStyles.Integer, CultureInfo.InvariantCulture, out var value))
+                yield return value;
+    }
+
+    private sealed record EntityGroupKey(
+        string DxfName,
+        string CppClassName,
+        string ApplicationName,
+        string SourceEntityType,
+        string Vendor,
+        string Representation)
+    {
+        public static EntityGroupKey From(CadCustomEntity entity)
+            => new(
+                entity.ClassDefinition?.DxfName ?? string.Empty,
+                entity.ClassDefinition?.CppClassName ?? string.Empty,
+                entity.ClassDefinition?.ApplicationName ?? string.Empty,
+                entity.SourceEntityType,
+                entity.Vendor.ToString(),
+                entity.Representation.ToString());
+    }
+}
+
+internal sealed record CadCompatibilityReport(
+    int SchemaVersion,
+    DateTimeOffset GeneratedUtc,
+    string AppVersion,
+    string CadCoreAssemblyVersion,
+    string CadAdapterAssemblyVersion,
+    string SourceFormat,
+    string CadVersion,
+    string Units,
+    int CustomClassCount,
+    int CustomEntityCount,
+    IReadOnlyDictionary<string, string> AggregateMetadata,
+    IReadOnlyList<CadCompatibilityCustomGroup> CustomGroups);
+
+internal sealed record CadCompatibilityCustomGroup(
+    string DxfName,
+    string CppClassName,
+    string ApplicationName,
+    string SourceEntityType,
+    string Vendor,
+    string Representation,
+    int EntityCount,
+    IReadOnlyList<string> ProxyGraphicKinds,
+    long ProxyGraphicCommandCount,
+    long ProxyGraphicTranslatedCount,
+    long ProxyGraphicUnsupportedCount,
+    long RawCommandDeclaredCount,
+    long RawCommandScannedCount,
+    long RawCommandKnownCount,
+    long RawCommandUnknownCount,
+    int RawCommandMalformedEntityCount,
+    int RawCommandTruncatedEntityCount,
+    IReadOnlyList<int> RawUnknownTypeIds,
+    IReadOnlyList<string> RawCommandTypeSignatures);
diff --git a/src/SpatialViewer.App/Strings/en-US/Resources.resw b/src/SpatialViewer.App/Strings/en-US/Resources.resw
index 8802942..0187812 100644
--- a/src/SpatialViewer.App/Strings/en-US/Resources.resw
+++ b/src/SpatialViewer.App/Strings/en-US/Resources.resw
@@ -156,4 +156,12 @@
   <data name="Update_Download" xml:space="preserve"><value>Download update</value></data>
   <data name="Update_Retry" xml:space="preserve"><value>Retry</value></data>
   <data name="Update_WaitingRestart" xml:space="preserve"><value>Waiting for restart</value></data>
+  <data name="CadCompatibilityReportButton.Content" xml:space="preserve"><value>Export CAD compatibility report</value></data>
+  <data name="Cad_CompatibilityReport_Unavailable" xml:space="preserve"><value>Report is not available yet</value></data>
+  <data name="Cad_CompatibilityReport_UnavailableMessage" xml:space="preserve"><value>The current drawing has not finished loading.</value></data>
+  <data name="Cad_CompatibilityReport_Saved" xml:space="preserve"><value>CAD compatibility report exported</value></data>
+  <data name="Cad_CompatibilityReport_SavedMessage" xml:space="preserve"><value>Report saved to: {0}\nThe file path was copied to the clipboard.</value></data>
+  <data name="Cad_CompatibilityReport_PathCopied" xml:space="preserve"><value>Compatibility report path copied</value></data>
+  <data name="Cad_CompatibilityReport_Failed" xml:space="preserve"><value>CAD compatibility report export failed</value></data>
+  <data name="Cad_CompatibilityReport_FailedMessage" xml:space="preserve"><value>The diagnostic report could not be written. Check local file permissions and try again.</value></data>
 </root>
diff --git a/src/SpatialViewer.App/Strings/ja-JP/Resources.resw b/src/SpatialViewer.App/Strings/ja-JP/Resources.resw
index 26c802a..6008482 100644
--- a/src/SpatialViewer.App/Strings/ja-JP/Resources.resw
+++ b/src/SpatialViewer.App/Strings/ja-JP/Resources.resw
@@ -156,4 +156,12 @@
   <data name="Update_Download" xml:space="preserve"><value>更新をダウンロード</value></data>
   <data name="Update_Retry" xml:space="preserve"><value>再試行</value></data>
   <data name="Update_WaitingRestart" xml:space="preserve"><value>再起動待ち</value></data>
+  <data name="CadCompatibilityReportButton.Content" xml:space="preserve"><value>CAD 互換性レポートを出力</value></data>
+  <data name="Cad_CompatibilityReport_Unavailable" xml:space="preserve"><value>レポートを出力できません</value></data>
+  <data name="Cad_CompatibilityReport_UnavailableMessage" xml:space="preserve"><value>現在の図面はまだ読み込みを完了していません。</value></data>
+  <data name="Cad_CompatibilityReport_Saved" xml:space="preserve"><value>CAD 互換性レポートを出力しました</value></data>
+  <data name="Cad_CompatibilityReport_SavedMessage" xml:space="preserve"><value>レポートを保存しました：{0}\nファイルパスをクリップボードにコピーしました。</value></data>
+  <data name="Cad_CompatibilityReport_PathCopied" xml:space="preserve"><value>互換性レポートのパスをコピーしました</value></data>
+  <data name="Cad_CompatibilityReport_Failed" xml:space="preserve"><value>CAD 互換性レポートの出力に失敗しました</value></data>
+  <data name="Cad_CompatibilityReport_FailedMessage" xml:space="preserve"><value>診断レポートを書き込めません。ローカルのファイル権限を確認して再試行してください。</value></data>
 </root>
diff --git a/src/SpatialViewer.App/Strings/zh-CN/Resources.resw b/src/SpatialViewer.App/Strings/zh-CN/Resources.resw
index 37bbca6..b716927 100644
--- a/src/SpatialViewer.App/Strings/zh-CN/Resources.resw
+++ b/src/SpatialViewer.App/Strings/zh-CN/Resources.resw
@@ -156,4 +156,12 @@
   <data name="Update_Download" xml:space="preserve"><value>下载更新</value></data>
   <data name="Update_Retry" xml:space="preserve"><value>重试</value></data>
   <data name="Update_WaitingRestart" xml:space="preserve"><value>等待重启</value></data>
+  <data name="CadCompatibilityReportButton.Content" xml:space="preserve"><value>导出 CAD 兼容性报告</value></data>
+  <data name="Cad_CompatibilityReport_Unavailable" xml:space="preserve"><value>暂时无法导出报告</value></data>
+  <data name="Cad_CompatibilityReport_UnavailableMessage" xml:space="preserve"><value>当前图纸尚未完成读取。</value></data>
+  <data name="Cad_CompatibilityReport_Saved" xml:space="preserve"><value>CAD 兼容性报告已导出</value></data>
+  <data name="Cad_CompatibilityReport_SavedMessage" xml:space="preserve"><value>报告已保存到：{0}\n文件路径已复制到剪贴板。</value></data>
+  <data name="Cad_CompatibilityReport_PathCopied" xml:space="preserve"><value>兼容性报告路径已复制</value></data>
+  <data name="Cad_CompatibilityReport_Failed" xml:space="preserve"><value>CAD 兼容性报告导出失败</value></data>
+  <data name="Cad_CompatibilityReport_FailedMessage" xml:space="preserve"><value>无法写入诊断报告，请检查本机文件权限后重试。</value></data>
 </root>
diff --git a/src/SpatialViewer.App/Views/CadViewerView.xaml b/src/SpatialViewer.App/Views/CadViewerView.xaml
index 5ed2572..19af612 100644
--- a/src/SpatialViewer.App/Views/CadViewerView.xaml
+++ b/src/SpatialViewer.App/Views/CadViewerView.xaml
@@ -30,7 +30,13 @@
       <SplitView.Content>
         <SplitView x:Name="RightPaneHost" DisplayMode="Inline" PanePlacement="Right" IsPaneOpen="True" OpenPaneLength="300" CompactPaneLength="0">
           <SplitView.Pane>
-            <Border x:Name="RightPanel" Background="{ThemeResource BgPanelBrush}" BorderBrush="{ThemeResource BorderBrush}" BorderThickness="1,0,0,0" Padding="12"><StackPanel Spacing="10"><TextBlock x:Uid="CadPropertiesPanelTitle" Text="属性" Style="{StaticResource BodyText}" FontWeight="SemiBold" /><TextBlock x:Name="PropertiesEmpty" x:Uid="CadPropertiesEmpty" Text="选择一个对象以查看真实 CAD 属性。" Style="{StaticResource BodyText}" Foreground="{ThemeResource TextSecondaryBrush}" TextWrapping="Wrap" /><ListView x:Name="PropertiesList"><ListView.ItemTemplate><DataTemplate><StackPanel><TextBlock Text="{Binding Label}" Style="{StaticResource MetadataText}" /><TextBlock Text="{Binding Value}" TextWrapping="Wrap" /></StackPanel></DataTemplate></ListView.ItemTemplate></ListView><InfoBar x:Name="DiagnosticsBar" x:Uid="CadDiagnosticsBar" IsOpen="False" Severity="Warning" Title="图纸包含暂不支持的对象" IsClosable="True" /></StackPanel></Border>
+            <Border x:Name="RightPanel" Background="{ThemeResource BgPanelBrush}" BorderBrush="{ThemeResource BorderBrush}" BorderThickness="1,0,0,0" Padding="12"><StackPanel Spacing="10"><TextBlock x:Uid="CadPropertiesPanelTitle" Text="属性" Style="{StaticResource BodyText}" FontWeight="SemiBold" /><TextBlock x:Name="PropertiesEmpty" x:Uid="CadPropertiesEmpty" Text="选择一个对象以查看真实 CAD 属性。" Style="{StaticResource BodyText}" Foreground="{ThemeResource TextSecondaryBrush}" TextWrapping="Wrap" /><ListView x:Name="PropertiesList"><ListView.ItemTemplate><DataTemplate><StackPanel><TextBlock Text="{Binding Label}" Style="{StaticResource MetadataText}" /><TextBlock Text="{Binding Value}" TextWrapping="Wrap" /></StackPanel></DataTemplate></ListView.ItemTemplate></ListView><InfoBar x:Name="DiagnosticsBar" x:Uid="CadDiagnosticsBar" IsOpen="False" Severity="Warning" Title="图纸包含暂不支持的对象" IsClosable="True" />
+              <Button x:Name="CompatibilityReportButton"
+                      x:Uid="CadCompatibilityReportButton"
+                      Content="导出 CAD 兼容性报告"
+                      HorizontalAlignment="Stretch"
+                      HorizontalContentAlignment="Center"
+                      Click="ExportCompatibilityReport_Click" /></StackPanel></Border>
           </SplitView.Pane>
           <SplitView.Content><controls:CadViewportControl x:Name="Viewport" /></SplitView.Content>
         </SplitView>
diff --git a/src/SpatialViewer.App/Views/CadViewerView.xaml.cs b/src/SpatialViewer.App/Views/CadViewerView.xaml.cs
index 38096b6..cebb34a 100644
--- a/src/SpatialViewer.App/Views/CadViewerView.xaml.cs
+++ b/src/SpatialViewer.App/Views/CadViewerView.xaml.cs
@@ -6,6 +6,9 @@
 using SpatialViewer.Formats.Cad.ACadSharp;
 using SpatialViewer.Presentation;
 using System.Globalization;
+using System.Text;
+using System.Text.Json;
+using Windows.ApplicationModel.DataTransfer;
 
 namespace SpatialViewer.Product.Views;
 
@@ -166,6 +169,56 @@ private void Viewport_SelectionChanged(object? sender, SceneItem? item)
 
     private void Layer_Click(object sender, RoutedEventArgs e) => Viewport.Draw();
     private void LayerList_SelectionChanged(object sender, SelectionChangedEventArgs e) { }
+    private void ExportCompatibilityReport_Click(object sender, RoutedEventArgs e)
+    {
+        if (_session.State != DocumentSessionState.Ready || _session.Document is not CadDocument document)
+        {
+            DiagnosticsBar.Severity = InfoBarSeverity.Warning;
+            DiagnosticsBar.Title = T("Cad_CompatibilityReport_Unavailable");
+            DiagnosticsBar.Message = T("Cad_CompatibilityReport_UnavailableMessage");
+            DiagnosticsBar.IsOpen = true;
+            return;
+        }
+
+        try
+        {
+            var json = CadCompatibilityReportBuilder.Build(document);
+            var desktop = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
+            var root = string.IsNullOrWhiteSpace(desktop)
+                ? Path.Combine(
+                    Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+                    "SpatialViewer")
+                : desktop;
+            var directory = Path.Combine(root, "SpatialViewer Diagnostics");
+            Directory.CreateDirectory(directory);
+
+            var timestamp = DateTimeOffset.Now.ToString("yyyyMMdd-HHmmss", CultureInfo.InvariantCulture);
+            var path = Path.Combine(directory, $"SpatialViewer-CAD-compatibility-{timestamp}.json");
+            File.WriteAllText(path, json, new UTF8Encoding(encoderShouldEmitUTF8Identifier: false));
+
+            var clipboard = new DataPackage();
+            clipboard.SetText(path);
+            Clipboard.SetContent(clipboard);
+            Clipboard.Flush();
+
+            DiagnosticsBar.Severity = InfoBarSeverity.Success;
+            DiagnosticsBar.Title = T("Cad_CompatibilityReport_Saved");
+            DiagnosticsBar.Message = string.Format(
+                CultureInfo.CurrentCulture,
+                T("Cad_CompatibilityReport_SavedMessage"),
+                path);
+            DiagnosticsBar.IsOpen = true;
+            ObjectText.Text = T("Cad_CompatibilityReport_PathCopied");
+        }
+        catch (Exception exception) when (exception is IOException or UnauthorizedAccessException or JsonException)
+        {
+            DiagnosticsBar.Severity = InfoBarSeverity.Error;
+            DiagnosticsBar.Title = T("Cad_CompatibilityReport_Failed");
+            DiagnosticsBar.Message = T("Cad_CompatibilityReport_FailedMessage");
+            DiagnosticsBar.IsOpen = true;
+        }
+    }
+
     private void Fit_Click(object sender, RoutedEventArgs e) => Viewport.Fit();
     private void SelectTool_Click(object sender, RoutedEventArgs e) => SetMode(ViewerMode.Select);
     private void PanTool_Click(object sender, RoutedEventArgs e) => SetMode(ViewerMode.Pan);