diff --git a/cmd/cli/main.go b/cmd/cli/main.go
index 8b1fe1d..57a2828 100644
--- a/cmd/cli/main.go
+++ b/cmd/cli/main.go
@@ -414,6 +414,8 @@ func Main() {
 				log.Printf("%s   %s   %s", strings.Join(dates, "="), desc, amount)
 			}
 		}
+
+		log.Fatalf("not impl: for all accounts matched, any unique deltas to those accounts not in csv within dates?")
 	default:
 		log.Fatalf("unknown command %q", positional[0])
 	}