export interface CostSummary {
    sessionId: string;
    totalInvocations: number;
    totalDurationMs: number;
    taskBreakdown: Array<{
        taskId: string;
        title: string;
        durationMs: number;
        reviewCycles: number;
    }>;
}
export declare function getSessionCost(sessionId: string): CostSummary;
export declare function formatCostSummary(cost: CostSummary): string;
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