export type ErrorCode = 'CONFIG_ERROR' | 'GITLAB_API_ERROR' | 'GITHUB_API_ERROR' | 'GIT_ERROR' | 'REVIEWER_ERROR' | 'PARSE_ERROR' | 'RUNTIME_ERROR';
export interface GitlabReviewErrorOptions extends ErrorOptions {
    code: ErrorCode;
    hint?: string;
    /**
     * Marks a deadline-exceeded failure. The CLI's `code` taxonomy stays coarse
     * (one code per subsystem), so timeouts are flagged here rather than via a
     * separate code; the OTel bridge reads it to label runs `status=timeout`.
     */
    timeout?: boolean;
    /**
     * Marks a provider credit/quota-exhaustion failure (e.g. HTTP 402). The review
     * could not run for reasons outside the MR's control, so the CLI treats it as
     * a non-fatal skip (warn, exit 0) rather than failing the pipeline.
     */
    quotaExceeded?: boolean;
}
export declare class GitlabReviewError extends Error {
    readonly code: ErrorCode;
    readonly hint?: string;
    readonly timeout: boolean;
    readonly quotaExceeded: boolean;
    constructor(message: string, options: GitlabReviewErrorOptions);
}
/** True when `message` looks like a provider credit/quota-exhaustion error. */
export declare function isQuotaExceededMessage(message: string | undefined): boolean;
/** True when `error` is (or reports) a provider credit/quota-exhaustion failure. */
export declare function isQuotaExceededError(error: unknown): boolean;
export declare class ConfigError extends GitlabReviewError {
    constructor(message: string, options?: Omit<GitlabReviewErrorOptions, 'code'>);
}
export declare class GitLabApiError extends GitlabReviewError {
    readonly method: string;
    readonly path: string;
    readonly status?: number;
    readonly responseBody?: string;
    constructor(message: string, options: Omit<GitlabReviewErrorOptions, 'code'> & {
        method: string;
        path: string;
        status?: number;
        responseBody?: string;
    });
}
export declare class GitHubApiError extends GitlabReviewError {
    readonly method: string;
    readonly path: string;
    readonly status?: number;
    readonly responseBody?: string;
    constructor(message: string, options: Omit<GitlabReviewErrorOptions, 'code'> & {
        method: string;
        path: string;
        status?: number;
        responseBody?: string;
    });
}
export declare class GitError extends GitlabReviewError {
    constructor(message: string, options?: Omit<GitlabReviewErrorOptions, 'code'>);
}
export declare class ReviewerError extends GitlabReviewError {
    constructor(message: string, options?: Omit<GitlabReviewErrorOptions, 'code'>);
}
export declare class ParseError extends GitlabReviewError {
    constructor(message: string, options?: Omit<GitlabReviewErrorOptions, 'code'>);
}
export declare class RuntimeError extends GitlabReviewError {
    constructor(message: string, options?: Omit<GitlabReviewErrorOptions, 'code'>);
}
export declare function formatError(error: unknown): string;
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