/**
 * Renders a workflow's correlated spans as a terminal waterfall/Gantt chart —
 * a text analog of the Agents HQ "Timeline" view. Each row is a step, drawn as
 * a colored bar positioned by its start offset and sized by its duration, on a
 * shared time axis.
 *
 * The tick math (TICK_STEPS_MS / pickTickStep / formatTickLabel) is a port of
 * Atlas's `StepGantt`; the bar geometry mirrors its leftPct/widthPct as integer
 * terminal columns.
 */
import type { Span, SpanStatus } from '#services/workflow_history/correlator.js';
export interface WaterfallOptions {
    width: number;
    color: boolean;
    header?: string;
    labels?: Map<string, string>;
}
export interface BarGeometry {
    startCol: number;
    barLen: number;
    instantaneous: boolean;
}
export declare const FULL_BLOCK = "\u2588";
export declare const THIN_BLOCK = "\u258F";
export declare const ANSI: Record<SpanStatus | 'dim' | 'reset', string>;
export declare function makeTint(color: boolean): (text: string, code: string) => string;
export declare function pickTickStep(totalMs: number): number;
export declare function buildTicks(totalMs: number): number[];
export declare function formatTickLabel(ms: number): string;
export declare function formatDurationLabel(ms: number): string;
export declare function computeBar(startOffsetMs: number, endOffsetMs: number, totalMs: number, trackW: number): BarGeometry;
export declare function buildRulerLine(totalMs: number, trackW: number): string;
export default function renderWaterfall(spans: Span[], totalDurationMs: number, options: WaterfallOptions): string;