add Pipeline.summary()

        clean_output_before_run: bool = True,

        **kwargs: Any,

    ):

        # record start time

        self.t_start = Time.now()

        # get pipeline information from env vars

        self.pipeline_id: str = os.getenv("PIPELINE_ID", "-")

        self.build: str = os.getenv("BUILD", "-")

        h.set("CREATED", self.pipeline_id, comment="pipeline build time")

        return reformat_header(h, strip=False, comment="Pipeline summary")

    def summarize(self):

    def summary(self):

        """Summarize this run."""

        pass

        t_stop: Time = Time.now()

        t_cost: float = (t_stop - self.t_start).value * 86400.0

        self.pipeline_logger.info(f"Total cost: {t_cost} sec")

    def clean_output(self):

        """Clean output directory."""