diff --git a/phases/shell-surface-pressure-load/index.json b/phases/shell-surface-pressure-load/index.json
index 0e296c3..6402daf 100644
--- a/phases/shell-surface-pressure-load/index.json
+++ b/phases/shell-surface-pressure-load/index.json
@@ -29,7 +29,10 @@
     {
       "step": 4,
       "name": "integrate-linear-shell-pressure",
-      "status": "pending"
+      "status": "completed",
+      "started_at": "2026-09-01T14:31:41+0900",
+      "summary": "Assembled deterministic reference-configuration shell pressure into the linear full-space load path with reaction, schema, and CLI preservation coverage.",
+      "completed_at": "2026-09-01T15:03:28+0900"
     },
     {
       "step": 5,