Bash

One-liner monitor

busctl --user monitor xyz.horchd.Daemon

Prints every D-Bus message touching the daemon. Useful for debugging.

React to fires with gdbus

gdbus monitor --session \
  --dest xyz.horchd.Daemon \
  --object-path /xyz/horchd/Daemon \
  | while read -r line; do
    case "$line" in
      *"xyz.horchd.Daemon1.Detected"*)
        name=$(echo "$line" | sed -nE "s/.*\\('([^']+)',.*/\\1/p")
        notify-send "horchd" "wake: ${name:-?}"
        ;;
    esac
  done

Adapt the notify-send line to whatever side-effect you want (mpv, curl, systemd-run, home-assistant CLI, etc.).

The same script ships in the daemon repo under examples/subscriber.sh.

Read the score too

gdbus monitor --session \
  --dest xyz.horchd.Daemon \
  --object-path /xyz/horchd/Daemon \
  | sed -nE "s/.*xyz\\.horchd\\.Daemon1\\.Detected \\(\\('([^']+)', ([^,]+), ([0-9]+)\\),\\).*/\\1\\t\\2\\t\\3/p" \
  | while read -r name score ts; do
      printf 'wake=%s score=%s ts=%s\n' "$name" "$score" "$ts"
    done