diff --git a/phases/linear-static-mitc4-shell/index.json b/phases/linear-static-mitc4-shell/index.json
index e67517f..ce1f0a9 100644
--- a/phases/linear-static-mitc4-shell/index.json
+++ b/phases/linear-static-mitc4-shell/index.json
@@ -29,7 +29,10 @@
     {
       "step": 3,
       "name": "mitc4-kinematics-constitutive",
-      "status": "pending"
+      "status": "completed",
+      "summary": "RED unit build failed with C1083 on missing mitc4_shell.hpp; GREEN added the validated concrete 20-DOF MITC4 shape/frame/channel-map, covariant tying/engineering-strain, constitutive/section-matrix, and fixed 2x2x2 quadrature seams; focused 9/9 and full CTest 98/98 passed.",
+      "started_at": "2026-08-12T19:28:55+0900",
+      "completed_at": "2026-08-12T19:41:51+0900"
     },
     {
       "step": 4,