/**
 * Typed error hierarchy — agents can distinguish auth, rate limit, validation errors by exit code.
 */
export declare const EXIT_CODES: {
    readonly SUCCESS: 0;
    readonly GENERIC: 1;
    readonly VALIDATION: 2;
    readonly AUTH: 3;
    readonly NOT_FOUND: 4;
    readonly RATE_LIMIT: 5;
    readonly PERMISSION: 6;
};
export declare class SlackCliError extends Error {
    readonly exitCode: number;
    readonly code: string;
    readonly suggestion?: string;
    constructor(message: string, opts?: {
        exitCode?: number;
        code?: string;
        suggestion?: string;
    });
}
export declare class AuthError extends SlackCliError {
    constructor(message: string, suggestion?: string);
}
export declare class RateLimitError extends SlackCliError {
    readonly retryAfter: number;
    constructor(retryAfter: number);
}
export declare class ValidationError extends SlackCliError {
    constructor(message: string, suggestion?: string);
}
export declare class NotFoundError extends SlackCliError {
    constructor(message: string, suggestion?: string);
}
export declare class PermissionError extends SlackCliError {
    constructor(message: string, suggestion?: string);
}
export declare function classifySlackError(err: unknown): SlackCliError;
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