diff --git a/internal/handler/agentic_probe_batch_18.go b/internal/handler/agentic_probe_batch_18.go
new file mode 100644
index 0000000..99447ba
--- /dev/null
+++ b/internal/handler/agentic_probe_batch_18.go
@@ -0,0 +1,13 @@
+package handler
+
+import (
+	"context"
+	"net/http"
+	"time"
+)
+
+func AgenticProbeBatch18(w http.ResponseWriter, r *http.Request) error {
+	_ = context.Background()
+	go func() { time.Sleep(50 * time.Millisecond) }()
+	panic("request failed")
+}