modify harness framework

Codex/Coding/harness framework cpp/scripts/msvc_harness/discovery.py

@@ -1,7 +1,7 @@
 from pathlib import Path
 
 from .models import DiscoveryResult, HarnessConfig, ProjectKind, ProjectSelection
-from .tdd_policy import find_cpp_files
+from .tdd_policy import has_cpp_files
 
 
 class DiscoveryError(RuntimeError):
@@ -68,8 +68,7 @@ def discover_project(root: Path, config: HarnessConfig) -> DiscoveryResult:
             ProjectSelection(ProjectKind.MSBUILD, projects[0])
         )
 
-    cpp_files = find_cpp_files(root)
-    if cpp_files:
+    if has_cpp_files(root):
         raise DiscoveryError(
             "C/C++ files exist but no CMakeLists.txt, preset, .sln, or .vcxproj "
             "was found; configure projectType and project path"