diff --git a/phases/linear-static-mitc4-shell/index.json b/phases/linear-static-mitc4-shell/index.json
index ba04dad..bd0ec12 100644
--- a/phases/linear-static-mitc4-shell/index.json
+++ b/phases/linear-static-mitc4-shell/index.json
@@ -61,7 +61,10 @@
     {
       "step": 7,
       "name": "shell-sparse-assembly",
-      "status": "pending"
+      "status": "completed",
+      "summary": "RED SparseAssembly failed 3/8 because shell produced zero CSR values and zero worker dispatch; GREEN added source-ordered 576-entry worker COO buffers for concrete FESA-MITC4 24x24 stiffness with canonical reduction and S4/S4R parity; focused 17/17 and full CTest 112/112 passed.",
+      "started_at": "2026-08-12T20:10:16+0900",
+      "completed_at": "2026-08-12T20:21:31+0900"
     },
     {
       "step": 8,