diff --git a/analysis_options.yaml b/analysis_options.yaml
index d6dd068cd84..e57f4c29d8e 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -164,8 +164,6 @@ dart_code_metrics:
       # TODO(https://github.com/flutter/devtools/issues/9906) remove these
       # excludes as findings are resolved.
       - integration_test/**
-      - lib/src/extensions/**
-      - lib/src/framework/**
       - lib/src/screens/**
       - lib/src/service/**
       - lib/src/shared/**
diff --git a/packages/devtools_app/lib/src/extensions/embedded/_controller_web.dart b/packages/devtools_app/lib/src/extensions/embedded/_controller_web.dart
index 388fe7ab9d8..bdcc3f16bf0 100644
--- a/packages/devtools_app/lib/src/extensions/embedded/_controller_web.dart
+++ b/packages/devtools_app/lib/src/extensions/embedded/_controller_web.dart
@@ -78,6 +78,7 @@ class EmbeddedExtensionControllerImpl extends EmbeddedExtensionController
   final extensionPostEventStream =
       StreamController<DevToolsExtensionEvent>.broadcast();
 
+    // ignore: unused-code, TODO(https://github.com/flutter/devtools/issues/9907): false positive.
   bool _initialized = false;
 
   @override
diff --git a/packages/devtools_app/lib/src/extensions/embedded/_view_desktop.dart b/packages/devtools_app/lib/src/extensions/embedded/_view_desktop.dart
index 5d9403f6ce8..051461bbbe0 100644
--- a/packages/devtools_app/lib/src/extensions/embedded/_view_desktop.dart
+++ b/packages/devtools_app/lib/src/extensions/embedded/_view_desktop.dart
@@ -7,9 +7,10 @@ import 'package:flutter/material.dart';
 import 'controller.dart';
 
 class EmbeddedExtension extends StatelessWidget {
-  const EmbeddedExtension({super.key, required this.controller});
-
-  final EmbeddedExtensionController controller;
+  const EmbeddedExtension({
+    super.key,
+    required EmbeddedExtensionController controller,
+  });
 
   @override
   Widget build(BuildContext context) {
diff --git a/packages/devtools_app/lib/src/extensions/extension_service.dart b/packages/devtools_app/lib/src/extensions/extension_service.dart
index 2c7513b48ca..ae49a3b7022 100644
--- a/packages/devtools_app/lib/src/extensions/extension_service.dart
+++ b/packages/devtools_app/lib/src/extensions/extension_service.dart
@@ -70,6 +70,7 @@ class ExtensionService extends DisposableController
   ///
   /// This set of extensions will include one version of a DevTools extension
   /// per package.
+  @visibleForTesting
   List<DevToolsExtensionConfig> get availableExtensions =>
       _currentExtensions.value.availableExtensions;
 
diff --git a/packages/devtools_app/lib/src/framework/home_screen.dart b/packages/devtools_app/lib/src/framework/home_screen.dart
index 7b02646f24e..c3fceb32168 100644
--- a/packages/devtools_app/lib/src/framework/home_screen.dart
+++ b/packages/devtools_app/lib/src/framework/home_screen.dart
@@ -32,8 +32,6 @@ class HomeScreen extends Screen {
         titleGenerator: () => devToolsTitle.value,
       );
 
-  static final id = ScreenMetaData.home.id;
-
   final List<DevToolsJsonFile> sampleData;
 
   @override
@@ -165,10 +163,7 @@ class _ConnectInputState extends State<ConnectInput> with BlockingActionMixin {
   void initState() {
     super.initState();
     connectDialogController = TextEditingController();
-    assert(() {
-      _debugInitVmServiceCache();
-      return true;
-    }());
+    if (kDebugMode) _debugInitVmServiceCache();
   }
 
   void _debugInitVmServiceCache() async {
diff --git a/packages/devtools_app/lib/src/framework/release_notes.dart b/packages/devtools_app/lib/src/framework/release_notes.dart
index f6ea52ca9aa..f7632c6eaf0 100644
--- a/packages/devtools_app/lib/src/framework/release_notes.dart
+++ b/packages/devtools_app/lib/src/framework/release_notes.dart
@@ -28,6 +28,7 @@ bool debugTestReleaseNotes = false;
 // from the flutter/website PR, which has a GitHub action that automatically
 // stages commits to firebase. Example:
 // https://flutter-docs-prod--pr12652-devtools-release-notes-2-52-3bbb8c0u.web.app/tools/devtools/release-notes/release-notes-2.52.0.md.
+// ignore: unused-code, debug-only feature.
 String? _debugReleaseNotesUrl;
 
 const releaseNotesKey = Key('release_notes');
diff --git a/packages/devtools_app/lib/src/framework/scaffold/status_line.dart b/packages/devtools_app/lib/src/framework/scaffold/status_line.dart
index 16133d36a29..54e78dc2954 100644
--- a/packages/devtools_app/lib/src/framework/scaffold/status_line.dart
+++ b/packages/devtools_app/lib/src/framework/scaffold/status_line.dart
@@ -37,8 +37,6 @@ class StatusLine extends StatelessWidget {
   /// Whether to highlight the footer when DevTools is connected to an app.
   final bool highlightForConnection;
 
-  static const deviceInfoTooltip = 'Device Info';
-
   /// The padding around the footer in the DevTools UI.
   EdgeInsets get padding => const EdgeInsets.symmetric(
     horizontal: defaultSpacing,