bin/context_engine/meta/context_engine.cmx

{
    "program": {
        "binary": "bin/app"
    },
    "sandbox": {
        "services": [
            "fuchsia.cobalt.LoggerFactory",
            "fuchsia.modular.ComponentContext",
            "fuchsia.ui.policy.Presenter",
            "fuchsia.sys.Launcher",
            "fuchsia.tracelink.Registry"
        ]
    }
}