import { z } from 'zod';
import { $ZodFunctionArgs, $ZodFunctionOut, $ZodType, util, $ZodRecordKey } from 'zod/v4/core';
export declare function isString(schema: $ZodType): schema is z.ZodString;
export declare function isNumber(schema: $ZodType): schema is z.ZodNumber;
export declare function isBoolean(schema: $ZodType): schema is z.ZodBoolean;
export declare function isNull(schema: $ZodType): schema is z.ZodNull;
export declare function isLiteral(schema: $ZodType): schema is z.ZodLiteral<string | number | boolean | null>;
export declare function isUndefined(schema: $ZodType): schema is z.ZodUndefined;
export declare function isUnknown(schema: $ZodType): schema is z.ZodUnknown;
export declare function isNever(schema: $ZodType): schema is z.ZodNever;
export declare function isAny(schema: $ZodType): schema is z.ZodAny;
export declare function isArray(schema: $ZodType): schema is z.ZodArray<z.ZodTypeAny>;
export declare function isObject(schema: $ZodType): schema is z.ZodObject<z.ZodRawShape>;
export declare function isTuple(schema: $ZodType): schema is z.ZodTuple;
export declare function isRecord(schema: $ZodType): schema is z.ZodRecord;
export declare function isEnum(schema: $ZodType): schema is z.ZodEnum<util.EnumLike>;
export declare function isUnion(schema: $ZodType): schema is z.ZodUnion<[z.ZodTypeAny, ...z.ZodTypeAny[]]>;
export declare function isOptional(schema: $ZodType): schema is z.ZodOptional<z.ZodTypeAny>;
export declare function isNullable(schema: $ZodType): schema is z.ZodNullable<z.ZodTypeAny>;
export declare function isDefault(schema: $ZodType): schema is z.ZodDefault<z.ZodTypeAny>;
export declare function isFunction(schema: $ZodType): schema is z.ZodFunction<$ZodFunctionArgs, $ZodFunctionOut>;
/**
 * Gets the element type from an array schema
 */
export declare function getArrayElement(schema: z.ZodArray<z.ZodTypeAny>): z.ZodTypeAny;
/**
 * Gets the shape from an object schema
 */
export declare function getObjectShape(schema: z.ZodObject<z.ZodRawShape>): z.ZodRawShape;
/**
 * Gets the items from a tuple schema
 */
export declare function getTupleItems(schema: z.ZodTuple): readonly $ZodType[];
/**
 * Gets the key and value types from a record schema
 */
export declare function getRecordTypes(schema: z.ZodRecord): {
    keyType: $ZodRecordKey;
    valueType: $ZodType;
};
/**
 * Gets the enum values from an enum schema
 */
export declare function getEnumValues(schema: z.ZodEnum<util.EnumLike>): util.EnumValue[];
export declare function getLiteralValue(schema: z.ZodLiteral<string | number | boolean | null>): string | number | boolean | null;
/**
 * Gets the options from a union schema
 */
export declare function getUnionOptions(schema: z.ZodUnion<[z.ZodTypeAny, ...z.ZodTypeAny[]]>): z.ZodTypeAny[];
/**
 * Unwraps an optional schema to get its inner type
 */
export declare function unwrapOptional(schema: z.ZodOptional<z.ZodTypeAny>): z.ZodTypeAny;
/**
 * Unwraps a nullable schema to get its inner type
 */
export declare function unwrapNullable(schema: z.ZodNullable<z.ZodTypeAny>): z.ZodTypeAny;
/**
 * Unwraps a default schema to get its inner type and default value
 */
export declare function unwrapDefault(schema: z.ZodDefault<z.ZodTypeAny>): {
    defaultValue: unknown;
    innerType: z.ZodTypeAny;
};
/**
 * Gets function arguments and return type from a function schema
 */
export declare function getFunctionSignature(schema: z.ZodFunction<$ZodFunctionArgs, $ZodFunctionOut>): {
    args: $ZodFunctionArgs;
    returns: $ZodFunctionOut;
};
/**
 * Checks if a number schema has integer constraint
 */
export declare function isNumberInteger(schema: z.ZodNumber): boolean;
/**
 * Gets metadata from a schema if it has been set with .meta()
 */
export declare function getMeta(schema: $ZodType): Record<string, unknown> | undefined;
/**
 * Gets a comment string from metadata.
 * If meta only contains a description key, returns the description string.
 * Otherwise, returns a JSON representation of the entire meta object.
 */
export declare function getMetaDescription(schema: $ZodType): string | undefined;