diff --git a/phases/linear-static-mitc4-shell/index.json b/phases/linear-static-mitc4-shell/index.json
index 6119151..8879a02 100644
--- a/phases/linear-static-mitc4-shell/index.json
+++ b/phases/linear-static-mitc4-shell/index.json
@@ -13,7 +13,10 @@
     {
       "step": 1,
       "name": "shell-domain-mapping",
-      "status": "pending"
+      "status": "completed",
+      "summary": "RED failed on valid S4/S4R mapping and missing shell diagnostics; GREEN added stable multi-instance FESA-MITC4 mapping, centered shell section/material resolution, and fail-closed shell diagnostics; focused 18/18 and full CTest 89/89 passed.",
+      "started_at": "2026-08-12T18:46:02+0900",
+      "completed_at": "2026-08-12T19:13:23+0900"
     },
     {
       "step": 2,