diff --git a/phases/cpp-object-oriented-modular-refactoring/index.json b/phases/cpp-object-oriented-modular-refactoring/index.json
index bec79ab..001de90 100644
--- a/phases/cpp-object-oriented-modular-refactoring/index.json
+++ b/phases/cpp-object-oriented-modular-refactoring/index.json
@@ -53,7 +53,10 @@
     {
       "step": 6,
       "name": "io-application-google-style",
-      "status": "pending"
+      "status": "completed",
+      "summary": "RED: current input_syntax_test.cpp against the Step 5 HEAD include tree failed with expected MSVC C1083 missing fesa/io/abaqus/input_reader.h; GREEN/VERIFY: focused targets built, I/O/HDF5/app/reference CTest 36/36 (Hdf5ResultsWriter 9/9, B33 reference 1/1, MITC4 S4 reference 2/2), clang-format 23/23, full MSVC Debug build, CTest discovery 144, and full CTest 144/144 passed; I/O, application, and test-only reference helpers now use .h guards, PascalCase, approved identifiers, and production-only Doxygen without schema, tolerance, or artifact changes.",
+      "started_at": "2026-08-16T06:20:09+0900",
+      "completed_at": "2026-08-16T06:59:50+0900"
     },
     {
       "step": 7,