/**
 * Reason code for invalid locator validation failures.
 * - `"reserved_name"`: A locator component is empty or `"."`.
 * - `"path_traversal"`: A locator component contains `..`.
 * - `"path_separator"`: A locator component contains a path separator (`/`, `\`) or null byte.
 * - `"negative_value"`: A numeric locator field (edition, amendment, recordInputPosition) is not a non-negative integer.
 */
export type InvalidLocatorReason = "reserved_name" | "path_traversal" | "path_separator" | "negative_value";
/**
 * Error thrown when a key locator is invalid for filesystem use.
 * Used to prevent path traversal and other filesystem injection when deriving paths from locators.
 *
 * @extends Error
 */
export declare class InvalidLocatorError extends Error {
    readonly locator: string;
    readonly reason: InvalidLocatorReason;
    /**
     * @param message - Human-readable description of the validation failure.
     * @param locator - The invalid locator string that failed validation.
     * @param reason - Machine-readable reason code for the failure.
     */
    constructor(message: string, locator: string, reason: InvalidLocatorReason);
}