/**
 * Factory: createRouter(opts?) → Router<TContext>
 *
 * Options:
 * - heartbeat: { intervalMs?, timeoutMs? } → enables heartbeat behavior
 * - limits: { maxPending?, maxPayloadBytes? } → enables rate limiting
 *
 * No capability options here; validators/pubsub/telemetry are plugins.
 */
import type { ConnectionData } from "../context/base-context.js";
import type { Router } from "./router.js";
import type { CreateRouterOptions } from "./types.js";
/**
 * Create a new router instance.
 *
 * @param opts Optional configuration:
 *   - heartbeat: heartbeat settings (optional)
 *   - limits: message/payload limits (optional)
 * @returns A RouterCore ready for plugins and handlers
 *
 * Example:
 * ```ts
 * const router = createRouter<{ userId: string }>({
 *   heartbeat: { intervalMs: 30_000, timeoutMs: 5_000 },
 *   limits: { maxPending: 128, maxPayloadBytes: 64 * 1024 },
 * });
 * ```
 */
export declare function createRouter<TContext extends ConnectionData = ConnectionData>(opts?: CreateRouterOptions): Router<TContext>;
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