diff --git a/phases/cpp-object-oriented-modular-refactoring/index.json b/phases/cpp-object-oriented-modular-refactoring/index.json
index 3f22606..4c8717a 100644
--- a/phases/cpp-object-oriented-modular-refactoring/index.json
+++ b/phases/cpp-object-oriented-modular-refactoring/index.json
@@ -29,7 +29,10 @@
     {
       "step": 3,
       "name": "foundation-google-style",
-      "status": "pending"
+      "status": "completed",
+      "summary": "RED: test-first status.h/PascalCase contract failed with expected MSVC C1083 missing-header error; GREEN/VERIFY: VS18 x64 Debug focused build and CTest 22/22, mandatory clang-format, full build, CTest discovery 144, and full CTest 144/144 passed; foundation core/math/linear-solver/build-info APIs now use .h guards, PascalCase names, approved identifiers, production-only Doxygen, and mechanically updated consumers without numerical/reference changes.",
+      "started_at": "2026-08-16T03:27:17+0900",
+      "completed_at": "2026-08-16T04:26:14+0900"
     },
     {
       "step": 4,