diff --git a/src/06-mini-project/common/common_ipc.h b/src/06-mini-project/common/common_ipc.h
new file mode 100644
index 0000000..a508e1e
--- /dev/null
+++ b/src/06-mini-project/common/common_ipc.h
@@ -0,0 +1,19 @@
+// common_ipc.h
+#ifndef COMMON_IPC_H
+#define COMMON_IPC_H
+
+#define SOCKET_PATH "/tmp/regulator_daemon.sock"
+
+/* Commands definitions */
+#define CMD_SET_MODE    10
+#define CMD_SET_FREQ    20
+#define CMD_INC_FREQ    30
+#define CMD_DEC_FREQ    40
+
+/* Structure of the message sent through IPC */
+typedef struct {
+    int command;
+    int value;
+} ipc_msg_t;
+
+#endif /* COMMON_IPC_H */