so, after some more fiddling I realized this is a bug in moode... unless playlists with extinf attributes are explicitly unsupported...
opened an issue (https://github.com/moode-player/moode/issues/173) and PR (https://github.com/moode-player/moode/pull/174)
opened an issue (https://github.com/moode-player/moode/issues/173) and PR (https://github.com/moode-player/moode/pull/174)