import { type WorkflowMeta } from '#services/workflow_history.js';
import type { Span } from '#services/workflow_history/correlator.js';
export interface StepGraph {
    spans: Span[];
    totalDurationMs: number;
    workflow: WorkflowMeta | null;
    labels: Map<string, string>;
    loading: boolean;
    error: string | null;
}
/**
 * Fetches a run's correlated step spans for the dev TUI's waterfall overlay,
 * reusing the same `fetchWorkflowHistory` path as the `workflow history` CLI
 * command. Driven by `usePoll`: while the run is still advancing it re-pulls
 * every tick so newly scheduled / finished steps appear, then stops and caches
 * once terminal. The modal ticks the time axis between polls so the right edge
 * tracks elapsed time.
 *
 * A hard fetch failure surfaces as `error` only when nothing has loaded yet — a
 * transient poll blip keeps the last good chart on screen.
 */
export declare const useStepGraph: (workflowId: string | undefined, runId: string | undefined, status?: string) => StepGraph;