diff --git a/modules/you_done_it/ydi_networking.h b/modules/you_done_it/ydi_networking.h
new file mode 100644
index 00000000..ca4ccb93
--- /dev/null
+++ b/modules/you_done_it/ydi_networking.h
@@ -0,0 +1,16 @@
+#ifndef YDI_NETWORKING_H
+#define YDI_NETWORKING_H
+
+namespace ydi {
+enum MessageType {
+	NONE = 0u,
+	CONNECTION_REQUEST = 1u,
+	CONNECTION_RESPONSE = 2u,
+};
+
+enum ClueID {
+	FIRST_CLUE,
+};
+}
+
+#endif // !YDI_NETWORKING_H
diff --git a/modules/you_done_it/ydi_server.cpp b/modules/you_done_it/ydi_server.cpp
new file mode 100644
index 00000000..faddc93d
--- /dev/null
+++ b/modules/you_done_it/ydi_server.cpp
@@ -0,0 +1,20 @@
+#include "ydi_server.h"
+#include <mutex>
+#include <optional>
+#include <thread>
+#include <zmq.hpp>
+#include <zmq_addon.hpp>
+
+namespace ydi::server {
+struct Service {
+	std::optional<zmq::context_t> context{ std::nullopt };
+	std::optional<zmq::socket_t> socket{ std::nullopt };
+	std::recursive_mutex mtx{};
+};
+
+std::optional<Service> service{ std::nullopt };
+thread_local std::optional<std::thread> receiveThread{ std::nullopt };
+
+void open(int port) {
+}
+}
diff --git a/modules/you_done_it/ydi_server.h b/modules/you_done_it/ydi_server.h
index a71b35eb..046b8020 100644
--- a/modules/you_done_it/ydi_server.h
+++ b/modules/you_done_it/ydi_server.h
@@ -1,10 +1,22 @@
 #ifndef YDI_SERVER_H
 #define YDI_SERVER_H
 
-#include <string>
+#include <cassert>
+#include <core/io/image.h>
+#include <string/ustring.h>
+#include <templates/vector.h>
+#include "ydi_networking.h"
 
 namespace ydi::server {
 void open(int port);
+void close();
+namespace receive {
+bool isRevealed(ClueID id);
+Ref<Image> clueImage(ClueID id);
+}
+namespace send {
+void announceConclusion(ClueID method, ClueID motive, ClueID murderer);
+}
 }
 
 #endif // !YDI_SERVER_H