import type { ModelInfo, ModelRef, TokenUsage, ChorusVoice } from "../types.js";
export interface RunBudget {
    maxUsd?: number;
    maxInputTokens?: number;
    maxOutputTokens?: number;
    maxVoices?: number;
    conductorReserveUsd?: number;
}
export interface BudgetEstimate {
    usd: number | null;
    inputTokens: number;
    outputTokens: number;
    voices: number;
    unknownPricing: boolean;
}
export declare function estimateBudget(args: {
    voices: ChorusVoice[];
    conductor: ModelRef;
    prompt: string;
    registry: ModelInfo[];
    outputTokens?: number;
}): BudgetEstimate;
export declare function budgetAllows(estimate: BudgetEstimate, budget: RunBudget): boolean;
export declare class BudgetTracker {
    readonly budget: RunBudget;
    private readonly reservedUsd;
    constructor(budget: RunBudget, reservedUsd?: number);
    private spentUsd;
    private inputTokens;
    private outputTokens;
    record(usage: TokenUsage | undefined, costUsd: number | null): void;
    canSpend(estimatedUsd: number): boolean;
    canStart(estimate: {
        usd: number | null;
        inputTokens: number;
        outputTokens: number;
    }, reserveConductor?: boolean): {
        allowed: boolean;
        reason?: string;
    };
    get actual(): {
        usd: number;
        inputTokens: number;
        outputTokens: number;
    };
}
export declare function estimateModelBudget(model: ModelRef, prompt: string, registry: ModelInfo[], outputTokens?: number): {
    usd: number | null;
    inputTokens: number;
    outputTokens: number;
};