diff --git a/phases/linear-static-mitc4-shell/index.json b/phases/linear-static-mitc4-shell/index.json
index 43adebf..6535278 100644
--- a/phases/linear-static-mitc4-shell/index.json
+++ b/phases/linear-static-mitc4-shell/index.json
@@ -109,7 +109,10 @@
     {
       "step": 13,
       "name": "shell-reference-comparison",
-      "status": "pending"
+      "status": "error",
+      "error_message": "[3회 시도 후 실패] reference-comparison: MITC4 comparator contract tests pass 6/6, but all four declared S4/S4R E2E tests fail before HDF5 generation with duplicate-entity at part ELSET Set-1; domain_mapper.cpp containsSetName incorrectly combines the part NSET and ELSET namespaces. Step 13 owns only the test reference module and forbids production fixes; hand off to Correction/Coordinator for the Step 1 shell-domain-mapping owner.",
+      "started_at": "2026-08-12T21:54:14+0900",
+      "failed_at": "2026-08-12T22:18:44+0900"
     }
   ],
   "created_at": "2026-08-12T17:50:02+0900"