diff --git a/attn/attn_common.hpp b/attn/attn_common.hpp
new file mode 100644
index 0000000..559a9f3
--- /dev/null
+++ b/attn/attn_common.hpp
@@ -0,0 +1,21 @@
+#pragma once
+
+namespace attn
+{
+
+enum class HostState
+{
+    Quiesce,
+    Diagnostic
+};
+
+/**
+ * @brief Transition the host state
+ *
+ * We will transition the host state by starting the appropriate dbus target.
+ *
+ * @param i_hostState the state to transition the host to
+ */
+void transitionHost(const HostState i_hostState);
+
+} // namespace attn