/**
 * Zod v3/v4 compatibility layer
 *
 * v3: Access schema definition via schema._def
 * v4: Access schema definition via schema._zod.def
 */
import type { ZodTypeAny } from "zod";
export declare function isRecord(value: unknown): value is Record<string, unknown>;
export interface SchemaDef extends Record<string, unknown> {
    typeName?: string;
    type?: string | ZodTypeAny;
    innerType?: ZodTypeAny;
    schema?: ZodTypeAny;
    inner?: ZodTypeAny;
    in?: ZodTypeAny;
    defaultValue?: unknown;
    options?: ZodTypeAny[];
    values?: unknown[];
    entries?: Record<string, unknown>;
    element?: unknown;
    description?: string;
}
export declare function isZodSchema(value: unknown): value is ZodTypeAny;
/**
 * Check if the schema is Zod v4
 * v4 has the "_zod" property
 */
export declare function isZodV4(schema: ZodTypeAny): boolean;
/**
 * Get the definition object from a schema
 * v3: schema._def
 * v4: schema._zod.def
 */
export declare function getDef(schema: ZodTypeAny): SchemaDef;
/**
 * Get the type name of a schema (returns v3 format)
 * v3: def.typeName (e.g., "ZodString")
 * v4: def.type (e.g., "string") -> converted to v3 format
 */
export declare function getTypeName(schema: ZodTypeAny): string;
/**
 * Get the inner type definition from a schema that has innerType
 */
export declare function getInnerTypeDef(schema: ZodTypeAny): SchemaDef | undefined;
/**
 * Get the inner type from a schema that has innerType
 */
export declare function getInnerType(schema: ZodTypeAny): ZodTypeAny | undefined;
/**
 * Get the default value from a schema
 * v3: defaultValue is a function
 * v4: defaultValue is a direct value
 */
export declare function getDefaultValue(schema: ZodTypeAny): unknown;
/**
 * Get union options from a union schema
 */
export declare function getUnionOptions(schema: ZodTypeAny): ZodTypeAny[];
/**
 * Get enum values from an enum schema
 */
export declare function getEnumValues(schema: ZodTypeAny): string[] | undefined;
/**
 * Get the element type from an array schema
 */
export declare function getArrayElementType(schema: ZodTypeAny): ZodTypeAny | undefined;
/**
 * Get the description from a schema
 */
export declare function getDescription(schema: ZodTypeAny): string | undefined;