export interface UsageTokens {
    input_tokens?: number;
    output_tokens?: number;
    cache_creation_input_tokens?: number;
    cache_read_input_tokens?: number;
}
export interface UsageReceipt {
    run_id: string;
    benchmark?: string;
    task_id?: string;
    arm?: string;
    seed?: number;
    replicate?: number;
    phase?: string;
    model?: string;
    started_at?: string;
    duration_ms?: number;
    duration_api_ms?: number;
    num_turns?: number;
    usage: UsageTokens;
    total_cost_usd?: number | null;
    usage_source: string;
    session_id?: string;
    schema?: string;
}
export interface UsageLedgerRow {
    benchmark: string;
    task_id: string;
    arm: string;
    runCount: number;
    inputTokens: number | null;
    outputTokens: number | null;
    cacheCreationInputTokens: number | null;
    cacheReadInputTokens: number | null;
    numTurns: number | null;
    durationMs: number | null;
    /** null unless EVERY receipt in the group carries a numeric total_cost_usd */
    costUsdTotal: number | null;
}
export interface UsageLedger {
    rows: UsageLedgerRow[];
    issues: string[];
}
export declare function parseUsageReceipts(jsonl: string): {
    receipts: UsageReceipt[];
    issues: string[];
};
export declare function aggregateUsage(receipts: UsageReceipt[]): UsageLedger;
export declare function renderUsageLedger(ledger: UsageLedger): string;