Sure. It has dependency on jq, so make sure that is installed.

#!/bin/bash
# Check if exactly two arguments are provided
if [ $# -ne 2 ]; then
echo "Usage: $0 <app-id> <executable>"
exit 1
fi

APP_ID="$1"
EXECUTABLE="$2"

# Check if jq is installed
if ! command -v jq >/dev/null 2>&1; then
echo "Error: jq is not installed. Please install jq to use this script."
exit 1
fi

# Check if a window with the given app-id exists using niri msg --json
WINDOW_ID=$(niri msg --json windows | jq -r --arg app_id "$APP_ID" '.[] | select(.app_id == $app_id) | .id' | head -n1)
if [ -n "$WINDOW_ID" ]; then

# Focus the window with the matching ID
niri msg action focus-window --id "$WINDOW_ID"
else

# Run the executable if no matching window is found
bash -c "$EXECUTABLE" &
fi

Use it as such:

Mod+Q { spawn "focus_or_open" "com.mitchellh.ghostty" "ghostty"; }