/**
 * Buffered transport for timeline events.
 *
 * Forwards events over the page channel (`../page-channel.ts`), which is
 * Vite's HMR WebSocket by default and can be pointed at a standalone
 * devframe server instead. Which carrier is in use is not this module's
 * concern.
 *
 * Batching: we coalesce events with `queueMicrotask` so a burst of
 * commit/set-part events from a single render doesn't hammer the channel
 * with one message per event.
 */
import type { TimelineEvent } from '../../../types/timeline.js';
import type { PageTransport } from '../page-channel.js';
type HotClient = Pick<PageTransport, 'send'>;
/**
 * Register the HMR hot client.
 * Called by install.ts after import.meta.hot check.
 * Flushes any queued events and fires pending one-shot callbacks.
 */
export declare const setHotClient: (hot: HotClient) => void;
/**
 * Register a callback to be invoked once the HMR client is available.
 * If the client is already set the callback is fired on the next microtask.
 */
export declare const setHotClientCallback: (cb: () => void) => void;
/**
 * Enqueue a timeline event for forwarding to the Vite server.
 * Batches via microtask so a single synchronous render burst
 * doesn't send dozens of individual messages.
 */
export declare const emit: (event: TimelineEvent) => void;
export {};
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