doas ifconfig urtwn0 scan | awk -v q='"' '
  BEGIN { print "["; first=1 }
  /nwid/ {
    if (!first) { printf "," }
    first=0
    ssid=$2; chan=$4; bssid=$6; sig=$8
    gsub(q, "\\" q, ssid) # Escape quotes in SSID
    printf "{\"ssid\":%s%s%s,\"channel\":%s,\"bssid\":\"%s\",\"signal\":\"%s\"}",
           q, ssid, q, chan, bssid, sig
  }
  END { print "]" }' | jq -c 2>/dev/null || echo '[]'