import type { RunRecord, Usage } from './types.js';
export declare const TOKEN_FIELDS: readonly ['inputTokens', 'outputTokens', 'uncachedInputTokens', 'cacheReadTokens', 'cacheWriteTokens'];
export type TokenField = typeof TOKEN_FIELDS[number];
export interface TokenSummary {
    /** Sum of available measurements, not an estimate of missing observations. */
    known: number | null;
    complete: boolean;
    unknown: number;
    unsupported: number;
    notApplicable: number;
}
export type UsageSummary = Record<TokenField, TokenSummary>;
export declare function usageParts(record: RunRecord): (Usage | null)[];
export declare function summarizeUsage(parts: (Usage | null)[]): UsageSummary;
export declare function formatTokens(summary: TokenSummary): string;
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