import type { z } from "zod";
/**
 * Validates that the value satisfies the provided schema.
 *
 * Upon success, the value's type is narrowed to the schema's output type.
 *
 * It uses `safeParse` internally.
 *
 * @param schema - The schema to validate against.
 * @param value - The value to validate.
 *
 * @returns Whether the value satisfies the schema.
 */
export declare function isValid<S extends z.ZodType>(schema: S, value: unknown): value is z.infer<S>;