Phosh has support for plugins which can be used to customize and extend certain aspects as per your liking without touching the internal source code.
Currently Phosh supports plugins for lock-screen and quick-settings. Lock-screen plugins appear when your phone is in locked state. Plugins here can be used to show information that doesn’t need one to unlock the screen. Examples include emergency information, upcoming events etc.
Quick-setting plugins are found in the quick-settings box (the one where Wi-Fi, Bluetooth etc.