/**
 * Type guards for MessageDescriptor.
 * Used by router to discriminate event handlers from RPC handlers.
 *
 * Note: kind is read from DESCRIPTOR symbol via getKind(), not from obj.kind directly.
 */
import type { MessageDescriptor } from "../protocol/message-descriptor.js";
export declare function isMessageDescriptor(obj: unknown): obj is MessageDescriptor;
export declare function isEventDescriptor(obj: unknown): obj is MessageDescriptor & {
    kind: "event";
};
export declare function isRpcDescriptor(obj: unknown): obj is MessageDescriptor & {
    kind: "rpc";
    response: MessageDescriptor;
};
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