This directory contains protocols that are internal to the Bluetooth subsystem. These interfaces are not published in the SDK. No component outside of the //src/connectivity/bluetooth subtree is allowed to access or interact with them without an explicit exception.
This protocol allows components to query the state of other components' lifecycles. There is nothing special about the current consumers of this API or Bluetooth components requires a custom protocol for watching lifecycle events other than the fact that profile components have side-effects in the system that are not visible through a FIDL interface directly. This protocol provides a way to check whether the component is in a state to perform required operations.