diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index 12af5d03f4..67d3d8d7a7 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -170,6 +170,8 @@ add_library(
   cmCustomCommandTypes.h
   cmCxxModuleMapper.cxx
   cmCxxModuleMapper.h
+  cmCxxModuleUsageEffects.cxx
+  cmCxxModuleUsageEffects.h
   cmDefinitions.cxx
   cmDefinitions.h
   cmDependencyProvider.h
diff --git a/Source/cmCxxModuleUsageEffects.cxx b/Source/cmCxxModuleUsageEffects.cxx
new file mode 100644
index 0000000000..eea52455ac
--- /dev/null
+++ b/Source/cmCxxModuleUsageEffects.cxx
@@ -0,0 +1,21 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmCxxModuleUsageEffects.h"
+
+cmCxxModuleUsageEffects::cmCxxModuleUsageEffects(
+  cmGeneratorTarget const* /*gt*/)
+  : Hash("0000000000000000000000000000000000000000")
+{
+  // TODO: collect information from the generator target as to what might
+  // affect module consumption.
+}
+
+void cmCxxModuleUsageEffects::ApplyToTarget(cmTarget* /*tgt*/)
+{
+  // TODO: apply the information collected in the constructor
+}
+
+std::string const& cmCxxModuleUsageEffects::GetHash() const
+{
+  return this->Hash;
+}
diff --git a/Source/cmCxxModuleUsageEffects.h b/Source/cmCxxModuleUsageEffects.h
new file mode 100644
index 0000000000..a63919c01e
--- /dev/null
+++ b/Source/cmCxxModuleUsageEffects.h
@@ -0,0 +1,22 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+#include "cmConfigure.h" // IWYU pragma: keep
+
+#include <string>
+
+class cmGeneratorTarget;
+class cmTarget;
+
+class cmCxxModuleUsageEffects
+{
+public:
+  cmCxxModuleUsageEffects(cmGeneratorTarget const* gt);
+
+  void ApplyToTarget(cmTarget* tgt);
+  std::string const& GetHash() const;
+
+private:
+  std::string Hash;
+};
diff --git a/bootstrap b/bootstrap
index 2c54dbf8b8..68885b39d3 100755
--- a/bootstrap
+++ b/bootstrap
@@ -333,6 +333,7 @@ CMAKE_CXX_SOURCES="\
   cmCustomCommandGenerator \
   cmCustomCommandLines \
   cmCxxModuleMapper \
+  cmCxxModuleUsageEffects \
   cmDefinePropertyCommand \
   cmDefinitions \
   cmDocumentationFormatter \