diff --git a/phases/nonlinear-static-newton-raphson/index.json b/phases/nonlinear-static-newton-raphson/index.json
index e724d5d..75c2098 100644
--- a/phases/nonlinear-static-newton-raphson/index.json
+++ b/phases/nonlinear-static-newton-raphson/index.json
@@ -29,7 +29,10 @@
     {
       "step": 3,
       "name": "nonlinear-mitc4-kinematics-and-recovery",
-      "status": "pending"
+      "status": "completed",
+      "summary": "Added nonlinear MITC4 fixed-reference kinematics, MITC recovery rows, and finite-rotation/objectivity coverage.",
+      "started_at": "2026-08-24T13:26:00+0900",
+      "completed_at": "2026-08-24T13:36:34+0900"
     },
     {
       "step": 4,