/**
 * Generates the client-side `realtime.gen.ts`.
 *
 * `PikkuRealtime` mirrors the `PikkuRPC` pattern: it wraps the project's
 * generated `PikkuFetch` (so server URL + auth come from one place) and
 * exposes:
 *
 *   - `subscribe(topic, handler)` / `unsubscribe(topic)` — typed pub/sub
 *     over the websocket at `/events`. Multi-topic per connection.
 *   - `subscribeToTopic(topic, handler)` — same shape but via SSE
 *     (one EventSource per topic, auto-cleanup on close).
 *   - `subscribeToSSE(path, handler)` — generic SSE subscribe for any
 *     `sse: true` route (workflow streams, agent streams, etc.).
 *   - `connectToChannel(channelRoute, protocols?)` — open a raw WebSocket
 *     for any wireChannel route, ready to wrap in
 *     `PikkuWebSocket<'channel-name'>` for typed subscribe/send.
 *
 * Topic types come from `EventHubTopics` if the user supplies an import
 * via `clientFiles.realtimeEventHubTopicsImport`. Otherwise topics fall
 * back to `Record<string, unknown>`.
 */
export declare const serializeRealtimeClient: (topicsImport: string | undefined, fetchImportPath: string) => string;