diff --git a/scripts/harb-evaluator/red-team-sweep.sh b/scripts/harb-evaluator/red-team-sweep.sh
index 7e31a12..4133b32 100755
--- a/scripts/harb-evaluator/red-team-sweep.sh
+++ b/scripts/harb-evaluator/red-team-sweep.sh
@@ -21,6 +21,8 @@ die() { log "FATAL: $*" >&2; exit 1; }
 
 [[ -f "$INJECT" ]] || die "inject.sh not found at $INJECT"
 
+mkdir -p "$ATTACKS_OUT"
+
 # Reset cross-patterns file for this sweep invocation (prevents stale data from prior runs)
 > "$CROSS_PATTERNS_FILE"