diff --git a/.github/workflows/ai_review.yml b/.github/workflows/ai_review.yml
index fa056be..0be33a6 100644
--- a/.github/workflows/ai_review.yml
+++ b/.github/workflows/ai_review.yml
@@ -11,7 +11,7 @@ name: AI Monthly Review
 
 jobs:
   ai-review:
-    if: contains(github.event.issue.labels.*.name, 'monthly-review') || inputs.issue_number != ''
+    if: vars.LEGACY_AI_REVIEW_ENABLED == 'true' && (contains(github.event.issue.labels.*.name, 'monthly-review') || inputs.issue_number != '')
     runs-on: ubuntu-latest
     permissions:
       contents: read
diff --git a/tests/test_monthly_publish_workflow_config.py b/tests/test_monthly_publish_workflow_config.py
index be49df5..642ad92 100644
--- a/tests/test_monthly_publish_workflow_config.py
+++ b/tests/test_monthly_publish_workflow_config.py
@@ -55,6 +55,7 @@ def test_ai_review_workflow_supports_dispatch_and_comment_posting(self) -> None:
 
         self.assertIn("workflow_dispatch:", workflow)
         self.assertIn("issue_number:", workflow)
+        self.assertIn("vars.LEGACY_AI_REVIEW_ENABLED == 'true'", workflow)
         self.assertIn("id-token: write", workflow)
         self.assertIn("Load review issue context", workflow)
         self.assertIn("api.github.com/repos/{repo}/issues/{issue_number}", workflow)