diff --git a/internal/api/server.go b/internal/api/server.go
index a170bb2..12f48b2 100644
--- a/internal/api/server.go
+++ b/internal/api/server.go
@@ -147,6 +147,16 @@ func (sw *statusWriter) WriteHeader(code int) {
 	sw.ResponseWriter.WriteHeader(code)
 }
 
+// Flush forwards to the underlying ResponseWriter when it implements Flusher.
+// Without this method, the type assertion `w.(http.Flusher)` in the SSE handlers
+// fails (the wrapper hides the inner Flusher), and the handler aborts with
+// "streaming unsupported".
+func (sw *statusWriter) Flush() {
+	if f, ok := sw.ResponseWriter.(http.Flusher); ok {
+		f.Flush()
+	}
+}
+
 // --- Helpers ---
 
 func writeJSON(w http.ResponseWriter, status int, v any) {