import { NodeData } from '../../types/core';
/**
 * Internal prefix used to identify error node types.
 * This prefix is prepended to the original unknown type name.
 */
export declare const ERROR_NODE_TYPE_PREFIX = "__error__:";
/**
 * Data structure for error nodes displayed when a node definition is not found.
 */
export type ErrorNodeData = {
    /** The original type name that was not found in the registry */
    originalType: string;
    /** Human-readable error message */
    errorMessage: string;
} & NodeData;
/**
 * Checks if a node type string represents an error node.
 */
export declare const isErrorNodeType: (type: string) => boolean;
/**
 * Extracts the original type name from an error node type.
 * Returns undefined if the type is not an error node type.
 */
export declare const getOriginalTypeFromErrorType: (type: string) => string | undefined;