This implements daemons and libraries providing device telemetry and diagnostics.
The daemon that collects telemetry information and exposes APIs that allow to access it. This daemon also acts as a proxy to the more heavily isolated diagnostics_processor daemon.
This daemon will process the telemetry information provided by the diagnosticsd daemon. Exposes an API that allows to obtain the output of the telemetry processing.
The bidirectional API between diagnosticsd and the browser is based on Mojo. The bootstrapping of the Mojo connection is performed via D-Bus - specifically, by the browser calling the BootstrapMojoConnection method.
The bidirectional API between diagnosticsd and diagnostics_processor is based on gRPC running over Unix domain sockets.