import type { WorkerSamples } from "./worker.js";
import type { LoadReport, ScenarioSpec } from "./types.js";
export interface BuildLoadReportInput {
    baseUrl: string;
    startTime: number;
    endTime: number;
    durationMs: number;
    plannedDurationMs: number;
    rampUpMs: number;
    planned: ReadonlyArray<{
        workerIndex: number;
        spec: ScenarioSpec;
    }>;
    samples: ReadonlyArray<WorkerSamples>;
    /** Default 1000ms. Values <= 0 disable the timeline (returned empty). */
    timelineBucketMs?: number;
    /**
     * Per-fault-rule wall-clock firing timestamps. Keys appear in the
     * `faults` map of every TimelineBucket (zero for buckets where the
     * rule didn't fire) so consumers can read row × column.
     */
    faultFirings?: Record<string, ReadonlyArray<number>>;
}
export declare function buildLoadReport(input: BuildLoadReportInput): LoadReport;
/** Render a `LoadReport` as a compact ASCII summary for terminals / CI logs. */
export declare function formatLoadReport(report: LoadReport): string;
/**
 * Map an array of counts to a unicode sparkline. Empty / all-zero
 * input → an empty string. Scales linearly so 0 always maps to "▁"
 * and the max maps to "█".
 */
export declare function sparkline(values: ReadonlyArray<number>): string;
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