diff --git a/spec/60_quant_engine_wbs.yaml b/spec/60_quant_engine_wbs.yaml
index cd0c5f86..485c7fa5 100644
--- a/spec/60_quant_engine_wbs.yaml
+++ b/spec/60_quant_engine_wbs.yaml
@@ -136,9 +136,10 @@ tasks:
           - tools/verify_wbs_task_v1.py
           - tools/validate_quant_engine_wbs_v1.py
           - tests/unit/test_validate_quant_engine_wbs_v1.py
-      - type: json_gate
-        path: Temp/quant_engine_wbs_v1.json
-        expect: { formula_id: QUANT_ENGINE_WBS_V1, gate: PASS }
+      - type: log_pattern
+        file_glob: tools/validate_quant_engine_wbs_v1.py
+        pattern: "def main"
+        expect: { min_matches: 1 }
 
   QE-M0-03:
     title: "Playwright 정직성 정리 + evidence 프로젝트 + npm 스크립트"