export interface ProviderRequestBudget {
    readonly maxRequests: number;
    readonly intervalMs: number;
}
export interface ProviderRateLimitSnapshot {
    readonly provider: string;
    readonly rateLimitCount: number;
    readonly cooldownUntil: number;
}
export declare function configureProviderRequestBudget(provider: string, budget: ProviderRequestBudget | undefined): void;
export declare function providerRateLimitSnapshot(provider: string): ProviderRateLimitSnapshot | undefined;
export declare function providerIdForModel(model: string | object | undefined): string | undefined;
export declare function providerCooldownMs(provider: string | undefined): number;
export declare function providerAdmissionDelayMs(provider: string): number;
export declare function tryAdmitProviderRequest(provider: string): number;
export declare function isProviderRateLimit(error: unknown): boolean;
export declare function markProviderRateLimitObserved(error: object): void;
export declare function recordProviderRateLimit(provider: string | undefined, error: unknown): number | undefined;
export declare function recordProviderSuccess(provider: string): void;
export declare function providerRetryHint(error: unknown): {
    retryAfterMs?: number;
};
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