[ Proof ]
@callstack/react-native-brownfield
published ReactNativeBrownfield.js runs unchanged against a ReactNativeBrownfield seam that mirrors the hostless regime: silent methods, subscribed but never-emitted messages50%
API coverageWorking (3)
module presence; ios popToNativesetNativeBackGestureAndButtonEnabledpostMessage all silent; onMessage subscribe and remove with zero events on both platforms; android back-button flag write
Missing (3)
host integration paths: android postMessage dispatchandroid popToNative back pressnative-to-js message emission