A look at the architecture beneath SHIFT's convergence mode: one configuration flag, a dozen listeners, and what it actually takes to make a phone shell turn into a desktop without restarting. The first post about SHIFT described what convergence means at the intent level: a single shell that reconfigures itself when you connect a monitor, without rebooting, without switching sessions. This one goes one level down, into how it's actually built. One flag The whole thing pivots on a single value: convergenceModeEnabled , a boolean stored in plasmamobilerc . Every component in the shell reads it from ShellSettings.Settings , a shared QML singleton. When it changes — because you docked the device, or because you toggled the quick setting — the change propagates automatically to every listener. No restart, no re-launch. What that looks like in practice: the navigation gesture bar has visible: !ShellSettings.Settings.convergenceModeEnabled . In phone mode it's there; in desktop mode it simply isn't.…