export interface DocumentCost {
    slug: string;
    costUsd: number;
    inputTokens: number;
    outputTokens: number;
    durationMs: number;
}
export interface CostSummary {
    totalCostUsd: number;
    totalInputTokens: number;
    totalOutputTokens: number;
    totalDurationMs: number;
    documents: DocumentCost[];
}
export declare class CostTracker {
    private documents;
    addDocumentCost(cost: DocumentCost): void;
    getTotalCost(): number;
    isOverLimit(limit: number | null): boolean;
    getSummary(): CostSummary;
}
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