/**
 * Message conversion between plain JS objects and rclnodejs typed messages.
 *
 * The RosTransport interface works with `Record<string, unknown>`, but
 * rclnodejs works with typed message class instances. This module bridges
 * the two — analogous to rosbridge_library's `dict_to_msg` / `msg_to_dict`.
 */
/**
 * Load a ROS2 message/service/action class via rclnodejs, with caching.
 */
export declare function loadMessageClass(typeStr: string): any;
/**
 * Convert a plain JS object to an rclnodejs message instance.
 *
 * Recursively assigns fields from `obj` onto a new message instance,
 * handling nested sub-messages (e.g. Twist.linear is a Vector3).
 */
export declare function toRosMessage(typeStr: string, obj: Record<string, unknown>): any;
/**
 * Convert an rclnodejs message instance to a plain JS object.
 *
 * Uses `toPlainObject()` if available (rclnodejs >= 0.21), otherwise
 * falls back to manual recursive field extraction.
 */
export declare function fromRosMessage(msg: any, rosTypeHint?: string): Record<string, unknown>;
/**
 * Clear the type cache. Called during shutdown.
 */
export declare function clearTypeCache(): void;
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