/**
 * DvalaValue Serialization Contract
 *
 * Defines which runtime value types can be serialized to JSON and restored.
 * Used at suspension time to produce clear errors when non-serializable
 * values are found in the continuation stack.
 *
 * Serializable value types:
 *   - Primitives: number, string, boolean, null
 *   - Containers: array, object (if all contents are serializable)
 *   - RegularExpression: stored as {s, f} string data
 *   - UserDefinedFunction: {params, body, capturedEnv} — all plain data
 *   - NormalBuiltinFunction: identified by normalBuiltinSymbolType (number)
 *   - SpecialBuiltinFunction: identified by specialBuiltinSymbolType (number)
 *   - ModuleFunction: identified by {moduleName, functionName}
 *   - PartialFunction, CompFunction, ConstantlyFunction, JuxtFunction,
 *     ComplementFunction, EveryPredFunction, SomePredFunction, FNullFunction:
 *     serializable only if all inner values/functions are serializable
 *   - EffectRef: stored as just the name string
 */
import type { Any } from '../interface';
/**
 * Checks whether a Dvala runtime value is fully JSON-serializable.
 *
 * Returns `true` if the value can be serialized and later restored.
 * Returns `false` if any part of the value contains a non-serializable reference.
 *
 * Uses a `Set` to track visited objects and avoid infinite loops from
 * circular references (which are themselves not serializable).
 */
export declare function isSerializable(value: Any, visited?: Set<object>): boolean;
/**
 * Describes why a value is not serializable.
 * Returns `null` if the value is serializable.
 * Returns a human-readable string describing the first non-serializable
 * component found.
 */
export declare function describeSerializationIssue(value: Any, path?: string): string | null;