/**
 * Unknown validation core module
 * Provides a validator that accepts any value but exposes it as `unknown`
 * to keep callers honest about narrowing before use.
 */
import { type StandardSchemaV1 } from "../../Validate/standardSchema";
/**
 * Return type produced by an `unknown` validator. Exposes the literal
 * `"unknown"` tag through the `type` field so `ValidateType<"unknown">` can
 * map it back to the `unknown` runtime type when consumed by downstream
 * helpers.
 */
export interface UnknownReturnType {
    validate: boolean;
    message: string;
    type: "unknown";
}
/**
 * Creates a validator that accepts any value but typed as unknown
 * @returns {Function} - Validator that always succeeds
 */
export declare const unknown: () => ((value: unknown) => UnknownReturnType) & StandardSchemaV1<unknown, unknown>;