/**
 * cost:stats command - Show cost tracking statistics from run journals
 *
 * Usage:
 *   babysitter cost:stats [runId] [--json] [--all] [--runs-dir <dir>]
 *
 * With runId: reads journal for that run, finds COST_TRACKED events, prints table
 * With --all: aggregates across all runs in the runs directory
 * With --json: outputs JSON instead of table
 */
import type { CostStatsOptions } from "../../cost/types";
export declare function handleCostStats(options: CostStatsOptions): Promise<number>;
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