lineage lineage ¶ Resolve checkpoint lineage for declarative execution steps. StepState(finished: bool, checkpoint: Node | None) dataclass ¶ Durable state already recorded for one execution step. Lineage(hardware: HardwareResult, execution_id: str) ¶ Inspect and resolve durable execution lineage. state(tag: str) -> StepState ¶ Return the finish tombstone and latest checkpoint for a step. resolve(base: BaseOf, previous_tag: str | None) -> Node | None ¶ Return the first checkpoint matching a base rule, if one exists.