diff --git a/hub/internal/domain/structure.go b/hub/internal/domain/agent.go
similarity index 100%
rename from hub/internal/domain/structure.go
rename to hub/internal/domain/agent.go
diff --git a/hub/internal/domain/stream.go b/hub/internal/domain/stream.go
new file mode 100644
index 0000000..a0d4499
--- /dev/null
+++ b/hub/internal/domain/stream.go
@@ -0,0 +1,34 @@
+package domain
+
+type AgentRequest struct {
+	RequestID string
+	Name      string
+	Args      map[string]string
+	TimeOut   int
+}
+
+type AgentResponse struct {
+	RequestID  string
+	Success    bool
+	Output     string
+	Error      string
+	ExecTimeMS int
+}
+
+type AgentAlert struct {
+	Timestamp   int
+	Level       string
+	Title       string
+	Description string
+}
+
+type SystemMetrics struct {
+	CpuUsage    float64
+	MemoryUsage float64
+	DiskUsage   float64
+}
+
+type Heartbeat struct {
+	Timestamp string
+	Metrics   SystemMetrics
+}