diff --git a/bin/omarchy-iso-test-stop b/bin/omarchy-iso-test-stop
new file mode 100755
index 0000000..7b9c7f0
--- /dev/null
+++ b/bin/omarchy-iso-test-stop
@@ -0,0 +1,101 @@
+#!/bin/bash
+#
+# Stop the VM a `omarchy-iso-test --keep-running` run left behind: graceful
+# guest poweroff over SSH first, escalating to TERM then KILL. The base image
+# is untouched either way; only the throwaway run overlay is affected.
+#
+# Usage: omarchy-iso-test-stop [--kill] [--port PORT]
+#
+#   --kill       Skip the graceful poweroff and kill the VM immediately
+#   --port PORT  Host port forwarded to guest SSH (default 2222)
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_DIR="$(dirname "$SCRIPT_DIR")"
+
+GUEST_USER="omarchy"
+GUEST_PASSWORD="omarchy"
+SSH_PORT=2222
+GRACEFUL=true
+
+while (($#)); do
+  case "$1" in
+    --kill) GRACEFUL=false ;;
+    --port) SSH_PORT="$2"; shift ;;
+    -h | --help)
+      sed -n '3,10p' "${BASH_SOURCE[0]}" | sed 's/^# \{0,1\}//'
+      exit 0
+      ;;
+    *) echo "Unknown option: $1" >&2; exit 1 ;;
+  esac
+  shift
+done
+
+# The newest run dir whose qemu is still alive is the VM to stop.
+PID=""
+PIDFILE=""
+while IFS= read -r candidate; do
+  pid=$(<"$candidate")
+  if kill -0 "$pid" 2>/dev/null; then
+    PID="$pid"
+    PIDFILE="$candidate"
+    break
+  fi
+done < <(ls -t "$REPO_DIR"/test-runs/*/runs/*/qemu.pid 2>/dev/null)
+
+if [[ -z $PID ]]; then
+  echo "No running omarchy-iso-test VM found." >&2
+  exit 1
+fi
+
+BASE_DIR="$(dirname "$(dirname "$(dirname "$PIDFILE")")")"
+SSH_KEY="$BASE_DIR/id_ed25519"
+
+# A harness that is still driving this VM dies with it; make sure that is
+# what the caller wants before pulling anything down.
+if [[ -t 0 ]]; then
+  if pgrep -f "bin/omarchy-iso-test .*\.iso" >/dev/null; then
+    echo "Warning: an omarchy-iso-test run appears to be in progress."
+  fi
+  if ! gum confirm "Stop test VM (pid $PID, ${PIDFILE#$REPO_DIR/})?"; then
+    exit 0
+  fi
+fi
+
+echo "Stopping test VM (pid $PID, ${PIDFILE#$REPO_DIR/})"
+
+if $GRACEFUL && [[ -f $SSH_KEY ]]; then
+  ssh -i "$SSH_KEY" -p "$SSH_PORT" \
+    -o BatchMode=yes \
+    -o IdentitiesOnly=yes \
+    -o StrictHostKeyChecking=no \
+    -o UserKnownHostsFile=/dev/null \
+    -o ConnectTimeout=5 \
+    -o LogLevel=ERROR \
+    "$GUEST_USER@127.0.0.1" \
+    "echo $GUEST_PASSWORD | sudo -S systemctl poweroff" >/dev/null 2>&1 || true
+
+  waited=0
+  while kill -0 "$PID" 2>/dev/null && ((waited < 15)); do
+    sleep 1
+    ((waited += 1))
+  done
+fi
+
+if kill -0 "$PID" 2>/dev/null; then
+  kill "$PID" 2>/dev/null || true
+  sleep 1
+fi
+
+if kill -0 "$PID" 2>/dev/null; then
+  kill -9 "$PID" 2>/dev/null || true
+  sleep 1
+fi
+
+if kill -0 "$PID" 2>/dev/null; then
+  echo "VM (pid $PID) refused to die." >&2
+  exit 1
+fi
+
+echo "VM stopped; port $SSH_PORT is free."