/**
 * src/llm/errors.ts
 *
 * Error hierarchy for LLM provider operations. Each error corresponds to
 * a failure classification from docs/architecture/provider-failover.md.
 */
export declare class UnsupportedOperationError extends Error {
    constructor(operation: string, provider: string);
}
export declare class AuthError extends Error {
    constructor(provider: string, detail?: string);
}
export declare class PaymentRequiredError extends Error {
    constructor(provider: string);
}
export declare class RateLimitedError extends Error {
    readonly retryAfter: number;
    constructor(provider: string, retryAfter?: number);
}
export declare class TimeoutError extends Error {
    constructor(provider: string);
}
export declare class ServiceUnavailableError extends Error {
    constructor(provider: string);
}
export declare class ModelNotFoundError extends Error {
    constructor(provider: string, model: string);
}
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