src/session/bin/session_manager/meta/session_manager.config

{
  "services": {
    "fuchsia.session.Launcher": [ "fuchsia-pkg://fuchsia.com/component_manager_sfw#meta/component_manager_sfw.cmx",  "fuchsia-pkg://fuchsia.com/session_manager#meta/session_manager.cm" ]
  },
  "startup_services": [
    "fuchsia.session.Launcher"
  ]
}