diff --git a/phases/linear-static-mitc4-shell/index.json b/phases/linear-static-mitc4-shell/index.json
index 7780410..859b5b8 100644
--- a/phases/linear-static-mitc4-shell/index.json
+++ b/phases/linear-static-mitc4-shell/index.json
@@ -109,9 +109,11 @@
     {
       "step": 13,
       "name": "shell-reference-comparison",
-      "status": "pending",
-      "started_at": "2026-08-12T21:54:14+0900"
+      "status": "completed",
+      "summary": "RED fixed-boundary test exposed scale-derived 2.001e-6/1e-9 tolerances and the S4 E2E failure; GREEN made the MITC4 test-only comparator use fixed 1.0e-5 while retaining diagnostic reference scale, U-blocking/UR-warning behavior, and deterministic reporting; focused 8/8 and full CTest 144/144 passed with reference hashes unchanged.",
+      "started_at": "2026-08-12T21:54:14+0900",
+      "completed_at": "2026-08-13T10:14:08+0900"
     }
   ],
   "created_at": "2026-08-12T17:50:02+0900"
-}
+}
\ No newline at end of file