import { type PromptRunnerUsage } from '../prompt-runner.js';
import { type BenchmarkPromptTokenSource } from './runner.js';
export interface PromptUsageSummaryEntry {
    usage?: PromptRunnerUsage | null;
    total_tokens?: number | null;
    prompt_token_source?: BenchmarkPromptTokenSource | null;
}
export declare function usageProviderLabel(entries: readonly PromptUsageSummaryEntry[]): string;
export declare function averageInputTokenLabel(entries: readonly PromptUsageSummaryEntry[]): string;
export declare function usageCaptureSummary(entries: readonly PromptUsageSummaryEntry[], subjectLabel: string): string | null;
export declare function averageReportedTotalTokens(entries: readonly PromptUsageSummaryEntry[]): number | null;
export declare function promptTokenSourceSuffix(source: BenchmarkPromptTokenSource | null | undefined): string;