diff --git a/phases/nonlinear-static-newton-raphson/index.json b/phases/nonlinear-static-newton-raphson/index.json
index 79a8b29..28ebc03 100644
--- a/phases/nonlinear-static-newton-raphson/index.json
+++ b/phases/nonlinear-static-newton-raphson/index.json
@@ -61,7 +61,10 @@
     {
       "step": 7,
       "name": "newton-iteration-log-writer",
-      "status": "pending"
+      "status": "completed",
+      "started_at": "2026-08-24T14:25:05+0900",
+      "summary": "Added fixed-schema Newton iteration log serialization with fail-closed file lifecycle and regression coverage.",
+      "completed_at": "2026-08-24T14:34:19+0900"
     },
     {
       "step": 8,