I'm still not seeing docs on how to send content to Chromecast without using the Android, IOS, or Chrome APIs for doing so. Pointers? How would I build a comm

I'm still not seeing docs on how to send content to Chromecast without using the Android, IOS, or Chrome APIs for doing so. Pointers? How would I build a commandline app to send content to Chromecast, for example? (see the list under Components: https://developers.google.com/cast/docs/developers https://developers.google.com/cast/docs/developers)