import type { PatchOperation } from "./types.js";
/** A live-update source that frames pushed patches as SSE and exposes them as a `Response`. */
export interface MeissaUpdateSource {
    /** Push a patch notification for `target` to every connected client. */
    push(target: string, patches: PatchOperation[]): void;
    /** End the stream (lets the client's `EventSource` reconnect). */
    close(): void;
    /** The `Response` to return from a route handler / server endpoint. */
    toResponse(): Response;
}
/**
 * Create an SSE-backed source for pushing `notifications/meissa/update` messages
 * (see spec/09-mcp-integration.md §6). Framework-agnostic — built on the Web
 * Streams API, so `toResponse()` works unmodified in Next.js Route Handlers, Bun,
 * Deno, and Cloudflare Workers.
 */
export declare function createUpdateStream(): MeissaUpdateSource;