Definitive log message to know that the GUI is ready?

Is there, or could there be a definitive message written to the log file that lets us know when the GUI is ready for login? That way, we don’t have to keep trying and getting an API error while it’s starting up.

I’m parsing the log file in my startup script to notify me now, but I can’t find anything more reliable than “zwave ready” in my setup.

Maybe even a startup progress bar on the GUI page or something?