diff --git a/src/cmd.hpp b/src/cmd.hpp
new file mode 100644
index 0000000..a6a6fa3
--- /dev/null
+++ b/src/cmd.hpp
@@ -0,0 +1,14 @@
+#pragma once
+#include <sdbusplus/bus.hpp>
+#include <sdbusplus/message.hpp>
+#include <sdbusplus/slot.hpp>
+#include <stdplus/fd/intf.hpp>
+
+namespace kcsbridge
+{
+
+void write(stdplus::Fd& kcs, sdbusplus::message::message&& m);
+void read(stdplus::Fd& kcs, sdbusplus::bus::bus& bus,
+          sdbusplus::slot::slot& outstanding);
+
+} // namespace kcsbridge