diff --git a/packages/_you_dart_internal/lib/analyzer.dart b/packages/_you_dart_internal/lib/analyzer.dart
index 3b7c362c..7836365e 100644
--- a/packages/_you_dart_internal/lib/analyzer.dart
+++ b/packages/_you_dart_internal/lib/analyzer.dart
@@ -1,2 +1,3 @@
 export 'package:_you_dart_internal/src/analyzer.dart' show CompilationUnitReader, AnnotationReader;
+export 'package:_you_dart_internal/src/analyzer.dart' show MemoryFsAnalyzer;
 export 'package:_you_dart_internal/src/pubspec.dart' show Pubspec;
diff --git a/packages/_you_dart_internal/lib/src/analyzer.dart b/packages/_you_dart_internal/lib/src/analyzer.dart
index 90d77d83..c4840ff4 100644
--- a/packages/_you_dart_internal/lib/src/analyzer.dart
+++ b/packages/_you_dart_internal/lib/src/analyzer.dart
@@ -1,22 +1,88 @@
 /// 本包与应用逻辑无关的common analyzer逻辑
 library;
 
+import 'package:analyzer/dart/analysis/analysis_context_collection.dart';
 import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/dart/analysis/session.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
+import 'package:analyzer/file_system/file_system.dart' as file_system;
+import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:code_builder/code_builder.dart';
-import 'package:file/file.dart';
-import 'package:path/path.dart' as path;
+
+import 'package:path/path.dart' as path_;
+
+// ignore: implementation_imports, there is no other way i don t want to copy it .
+import 'package:analyzer/src/test_utilities/mock_sdk.dart';
+
+/// 实验mock sdk 看能否用element模式而不是ast，未成功暂放
+class MemoryFsAnalyzer {
+  MemoryFsAnalyzer() {
+    _ensureFile("/pkg/pubspec.yaml", '''
+name: mock_lib
+version: 0.1.0
+
+environment:
+  sdk: '>=3.4.0 <4.0.0'
+''');
+
+    file_system.File initLibFile = _ensureFile("/pkg/lib/__init__.dart", """
+var v="first file use by create session";
+""");
+    ;
+
+    String sdkPath = '/sdk';
+    createMockSdk(
+      resourceProvider: _resourceProvider,
+      root: _ensureFolder(sdkPath),
+    );
+
+    var collection = AnalysisContextCollection(
+      includedPaths: [initLibFile.path],
+      resourceProvider: _resourceProvider,
+      sdkPath: sdkPath,
+    );
+    session = collection.contexts[0].currentSession;
+  }
+
+  final MemoryResourceProvider _resourceProvider = MemoryResourceProvider();
+  late final AnalysisSession session;
+  /// 测试页即简单的测试：500次 7s
+  Future<CompilationUnitReader> getResolvedLibrary({required String path, required String content}) async {
+    var file = _ensureFile(path_.absolute(path), content);
+    return CompilationUnitReader.resolve(session, file.path);
+  }
+
+  static Iterable<file_system.Resource> toList(file_system.Resource resource) sync* {
+    if (resource is file_system.File) {
+      yield resource;
+    }
+    if (resource is file_system.Folder) {
+      for (var x in resource.getChildren()) {
+        yield* toList(x);
+      }
+    }
+  }
+
+  file_system.Folder _ensureFolder(String path) {
+    String convertedPath = _resourceProvider.convertPath(path);
+    return _resourceProvider.getFolder(convertedPath)..create();
+  }
+
+  file_system.File _ensureFile(String path, String content) {
+    String convertedPath = _resourceProvider.convertPath(path);
+    return _resourceProvider.getFile(convertedPath)..writeAsStringSync(content);
+  }
+}
 
 class CompilationUnitReader {
   CompilationUnitReader(this.unit);
 
-  static Future<CompilationUnitReader> resolve(AnalysisSession analysisSession, File file) async {
-    assert(await file.exists(), "file:$file");
-    var result = (await analysisSession.getResolvedUnit(path.normalize(path.absolute(file.path))) as ResolvedUnitResult);
+  static Future<CompilationUnitReader> resolve(AnalysisSession analysisSession, String file) async {
+    var result = (await analysisSession.getResolvedUnit(path_.normalize(path_.absolute(file))) as ResolvedUnitResult);
+    assert(result.errors.isEmpty, "expect no error, but:${result.errors}");
     return CompilationUnitReader(result.unit);
   }
 
@@ -48,7 +114,7 @@ class CompilationUnitReader {
       if (t == null) continue;
 
       if (t is! InterfaceType) continue;
-      var findAnnoType = [t, ...t.allSupertypes].where((e) => e.getDisplayString(withNullability:true) == annoType).firstOrNull;
+      var findAnnoType = [t, ...t.allSupertypes].where((e) => e.getDisplayString(withNullability: true) == annoType).firstOrNull;
       if (findAnnoType == null) continue;
       if (annoUrl != null) {
         var publicExportFrom = findPublicExportLib(findAnnoType, library);
@@ -104,13 +170,12 @@ class AnnotationReader {
   Reference? getFieldTypeAsRef(String name) {
     var type = getField(name)?.toTypeValue();
     if (type == null) return null;
-    var symbol = type.getDisplayString(withNullability:true);
+    var symbol = type.getDisplayString(withNullability: true);
     if (symbol == "") return null;
     var publicExportFrom = findPublicExportLib(type, unit.library);
     var url = publicExportFrom?.identifier;
     return refer(symbol, url);
   }
-
 }
 
 /// given a internal lib: package:you_flutter/src/router.dart
diff --git a/packages/you_cli/lib/src/cli_core.dart b/packages/you_cli/lib/src/cli_core.dart
index dd2baecb..e8666d09 100644
--- a/packages/you_cli/lib/src/cli_core.dart
+++ b/packages/you_cli/lib/src/cli_core.dart
@@ -72,7 +72,7 @@ class YouCli {
       return null;
     }
 
-    CompilationUnitReader unit = await CompilationUnitReader.resolve(analysisSession, file);
+    CompilationUnitReader unit = await CompilationUnitReader.resolve(analysisSession, file.path);
     return unit.topFunction(layoutFunctionName);
   }
 
@@ -80,7 +80,7 @@ class YouCli {
     if (!await file.exists()) {
       return null;
     }
-    CompilationUnitReader unit = await CompilationUnitReader.resolve(analysisSession, file);
+    CompilationUnitReader unit = await CompilationUnitReader.resolve(analysisSession, file.path);
     return unit.topFunction(pageFunctionName);
   }
 
@@ -88,7 +88,7 @@ class YouCli {
     if (!await file.exists()) {
       return null;
     }
-    CompilationUnitReader unit = await CompilationUnitReader.resolve(analysisSession, file);
+    CompilationUnitReader unit = await CompilationUnitReader.resolve(analysisSession, file.path);
     return PageAnnotation.find(unit);
   }
 }
diff --git a/packages/you_cli/pubspec.yaml b/packages/you_cli/pubspec.yaml
index 9803f307..0af7bb31 100644
--- a/packages/you_cli/pubspec.yaml
+++ b/packages/you_cli/pubspec.yaml
@@ -26,6 +26,7 @@ dependencies:
 
   # you_*
   you_dart: ^0.0.6-dev.3
+  _you_dart_internal: ^0.0.6-dev.3
 dev_dependencies:
   lints: ^3.0.0
   test:
diff --git a/packages/you_cli/test/src/analyzer_test.dart b/packages/you_cli/test/src/analyzer_test.dart
index 1305bfc9..bad437f7 100644
--- a/packages/you_cli/test/src/analyzer_test.dart
+++ b/packages/you_cli/test/src/analyzer_test.dart
@@ -11,11 +11,11 @@ void main() {
   File notePage = fs.file("../../notes/flutter_web/lib/routes/notes/page.dart");
   group("AnalyzedUnit element", () {
     test('class_', () async {
-      var result = await CompilationUnitReader.resolve(cli.analysisSession, fs.file("lib/src/cli_core.dart"));
+      var result = await CompilationUnitReader.resolve(cli.analysisSession, "lib/src/cli_core.dart");
       check(result.class_("YouCli")!.displayName).equals("YouCli");
     });
     test('annotation', () async {
-      var result = await CompilationUnitReader.resolve(cli.analysisSession, notePage);
+      var result = await CompilationUnitReader.resolve(cli.analysisSession, notePage.path);
       var pageMeta = result.annotationOnTopFunction(funcName: "build", annoType: "PageAnnotation")!;
       check(pageMeta.ast.toSource()).equals('@NoteAnnotation(label: "笔记")');
     });
diff --git a/packages/you_flutter/lib/src/note/source_code.dart b/packages/you_flutter/lib/src/note/source_code.dart
index 85518463..01c06f8d 100644
--- a/packages/you_flutter/lib/src/note/source_code.dart
+++ b/packages/you_flutter/lib/src/note/source_code.dart
@@ -1,20 +1,12 @@
 import 'package:_you_dart_internal/utils.dart';
-import 'package:analyzer/dart/analysis/analysis_context_collection.dart';
 import 'package:analyzer/dart/analysis/features.dart';
-import 'package:analyzer/dart/analysis/results.dart';
-import 'package:analyzer/dart/analysis/session.dart';
 import 'package:analyzer/dart/analysis/utilities.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
-import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:flutter/foundation.dart';
 import 'package:http/http.dart' as http;
 import 'package:meta/meta.dart';
-import 'package:path/path.dart' as path_;
 
-// ignore: implementation_imports, there is no other way i don t want to copy it .
-import 'package:analyzer/src/test_utilities/mock_sdk.dart';
 import 'package:source_map_stack_trace/source_map_stack_trace.dart';
 import 'package:stack_trace/stack_trace.dart';
 import 'package:path/path.dart' as path;
@@ -127,89 +119,6 @@ class _CodeVisitor extends GeneralizingAstVisitor {
   }
 }
 
-/// 实验mock sdk 看能否用element模式而不是ast，未成功暂放
-@internal
-class MemoryCodeAnalyzer {
-  @visibleForTesting
-  final resourceProvider = MemoryResourceProvider();
-  late final AnalysisSession session;
-  final ({String path, String content}) _defaultInitLib = (
-    path: "/pkg/lib/note.dart",
-    content: """
-class Cell{
-  void call(Object? content) {}
-  Cell addCell() => Cell();
-  Cell addCellWith() => Cell();
-}
-  """
-  );
-
-  MemoryCodeAnalyzer() {
-    var libs = [_defaultInitLib];
-    for (var lib in libs) {
-      _newFile(lib.path, lib.content);
-    }
-    _newFile("/pkg/pubspec.yaml", '''
-name: mock_lib
-version: 0.1.0
-
-environment:
-  sdk: '>=3.4.0 <4.0.0'
-''');
-
-    String sdkPath = '/sdk';
-    createMockSdk(
-      resourceProvider: resourceProvider,
-      root: _newFolder(sdkPath),
-    );
-
-    var collection = AnalysisContextCollection(
-      includedPaths: libs.map((e) => e.path).toList(),
-      resourceProvider: resourceProvider,
-      sdkPath: sdkPath,
-    );
-    session = collection.contexts[0].currentSession;
-  }
-
-  Future<ResolvedLibraryResult> getResolvedLibrary({required String path, required String content}) async {
-    var file = _newFile(resourceProvider.convertPath(path_.absolute(path)), content);
-    return session.getResolvedLibrary(file.path) as ResolvedLibraryResult;
-  }
-
-  SomeParsedUnitResult getParsedUnit({required String path, required String content}) {
-    var file = _newFile(resourceProvider.convertPath(path_.absolute(path)), content);
-    return session.getParsedUnit(file.path);
-  }
-
-  /// 测试页即简单的测试：500次 7s
-  Future<SomeResolvedUnitResult> getResolvedUnit({required String path, required String content}) async {
-    var file = _newFile(resourceProvider.convertPath(path_.absolute(path)), content);
-    var result= await session.getResolvedUnit(file.path);
-    return result as ResolvedUnitResult;
-  }
-
-  static Iterable<Resource> toList(Resource resource) sync* {
-    if (resource is File) {
-      yield resource;
-    }
-    if (resource is Folder) {
-      for (var x in resource.getChildren()) {
-        yield* toList(x);
-      }
-    }
-  }
-
-  Folder _newFolder(String path) {
-    String convertedPath = resourceProvider.convertPath(path);
-    return resourceProvider.getFolder(convertedPath)..create();
-  }
-
-  File _newFile(String path, String content) {
-    String convertedPath = resourceProvider.convertPath(path);
-    return resourceProvider.getFile(convertedPath)..writeAsStringSync(content);
-  }
-}
-
 class CellCallerResult {
   final StackTrace originTrace;
   final StackTrace dartTrace;
diff --git a/packages/you_flutter/test/src/note/note_code_benchmark.dart b/packages/you_flutter/test/src/note/note_code_benchmark.dart
index ed6507cf..e0e90394 100644
--- a/packages/you_flutter/test/src/note/note_code_benchmark.dart
+++ b/packages/you_flutter/test/src/note/note_code_benchmark.dart
@@ -1,12 +1,12 @@
+import 'package:_you_dart_internal/analyzer.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:you_flutter/src/note/source_code.dart';
 
 void main() {
   group("CodeAnalyzer", () {
     test('resolve', () async {
-      MemoryCodeAnalyzer analyzer = MemoryCodeAnalyzer();
+      MemoryFsAnalyzer analyzer = MemoryFsAnalyzer();
       for (int i = 0; i < 500; i++) {
-        var resolveUnitResult = await analyzer.getResolvedUnit(path: "/pkg/lib/routes/notes/page.dart", content: '''
+        var resolveUnitResult = await analyzer.getResolvedLibrary(path: "/pkg/lib/routes/notes/page.dart", content: '''
 import 'package:flutter/widgets.dart';
 import 'package:you_flutter/note.dart';
 
diff --git a/packages/you_flutter/test/src/note/note_code_test.dart b/packages/you_flutter/test/src/note/note_code_test.dart
index 4acc0a27..9689a721 100644
--- a/packages/you_flutter/test/src/note/note_code_test.dart
+++ b/packages/you_flutter/test/src/note/note_code_test.dart
@@ -1,3 +1,4 @@
+import 'package:_you_dart_internal/analyzer.dart';
 import 'package:checks/checks.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:you_flutter/src/note/source_code.dart';
@@ -51,8 +52,8 @@ class TextExamples {
 
   group("CodeAnalyzer", () {
     test('resolve', () async {
-      MemoryCodeAnalyzer analyzer = MemoryCodeAnalyzer();
-      var resolveUnitResult = await analyzer.getResolvedUnit(path: "/pkg/lib/routes/notes/page.dart", content: '''
+      MemoryFsAnalyzer analyzer = MemoryFsAnalyzer();
+      var r = await analyzer.getResolvedLibrary(path: "/pkg/lib/routes/notes/page.dart", content: '''
 import 'package:flutter/widgets.dart';
 import 'package:you_flutter/note.dart';
 
@@ -67,7 +68,7 @@ class TextExamples {
   }
 }
 ''');
-      check(resolveUnitResult);
+      check(r.unit).isNotNull();
     });
   });
 }