diff --git a/tool/generator/pubspec.yaml b/tool/generator/pubspec.yaml
index 37fe2e3..d2dccb8 100644
--- a/tool/generator/pubspec.yaml
+++ b/tool/generator/pubspec.yaml
@@ -26,10 +26,6 @@ dev_dependencies:
   build_verify: ^3.1.0
   coverage: ^1.15.0
   lints: ^6.0.0
-  skills_lint:
-    git:
-      url: https://github.com/google/skills_lint.dart.git
-      path: packages/skills_lint
-      ref: e6e695e1550f81342fe5acd4dbe65040b5aa44c3
+  skills_lint: ^0.5.1
   test: ^1.25.6
 
diff --git a/tool/generator/test/custom_skill_rules/last_modified_rule.dart b/tool/generator/test/custom_skill_rules/last_modified_rule.dart
index b248b4e..bf6f6ba 100644
--- a/tool/generator/test/custom_skill_rules/last_modified_rule.dart
+++ b/tool/generator/test/custom_skill_rules/last_modified_rule.dart
@@ -26,6 +26,12 @@ class LastModifiedRule extends SkillRule {
       return errors;
     }
 
+    final skillName = yaml['name'];
+    if (skillName is String && skillName.startsWith('dart-')) {
+      // Dart skills are synced from dart-lang/skills and do not track generator metadata.
+      return errors;
+    }
+
     final Object? metadata = yaml[_metadataKey];
     if (metadata is! Map || !metadata.containsKey(_lastModifiedKey)) {
       errors.add(