Let us start here, from square one. No, from Zero!

script/manager.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <memory>
+
+namespace script {
+    class Instance;
+
+    void manager_scan();
+    void manager_add(std::shared_ptr<Instance> instance);
+    void manager_boot();
+    void manager_config();
+    void manager_shutdown();
+}