/**
 * Server-side protocol errors (SPEC.md §10).
 *
 * Every request-level failure raised by the server core is a `SyncError`
 * carrying the fixed catalog metadata of §10.2 (`category`, `retryable`,
 * `recommendedAction`) plus an HTTP status for transport adapters. The
 * catalog is closed: creating a `SyncError` with an unknown code throws.
 */
export interface ErrorCatalogEntry {
    readonly category: string;
    readonly retryable: boolean;
    readonly recommendedAction: string;
    readonly httpStatus: number;
}
/** The §10.2 wire catalog, keyed by stable code. */
export declare const ERROR_CATALOG: Readonly<Record<string, ErrorCatalogEntry>>;
export declare class SyncError extends Error {
    readonly name = "SyncError";
    readonly code: string;
    readonly category: string;
    readonly retryable: boolean;
    readonly recommendedAction: string;
    readonly httpStatus: number;
    readonly details?: string;
    constructor(code: string, message?: string, details?: string);
}
export declare function syncError(code: string, message?: string, details?: string): SyncError;
/** The §10.1 JSON error shape, for HTTP-level error bodies (§1.1). */
export declare function errorBody(error: SyncError): {
    code: string;
    category: string;
    retryable: boolean;
    recommendedAction: string;
    message: string;
    details?: unknown;
};