Method submitAndWaitStateful

packages/server-e2e/src/client.ts:639–655

* Stateful-session companion to `submitAndWait` — POSTs `body` verbatim * (NO default controls injected), then waits for the terminal event for * the resulting `prompt_id`. Use after `updateSession(sid, {agent_config: * {...}})` to verify the session's shadow drives the next prompt without

(
    sid: string,
    body: PromptSubmission,
    opts: SubmitAndWaitOptions = {},
  )

   * the body needing to redeclare any controls.
   */
  async submitAndWaitStateful(
    sid: string,
    body: PromptSubmission,
    opts: SubmitAndWaitOptions = {},
  ): Promise<{ prompt_id: string; user_message_id: string; finalFrame: AnyFrame }> {
    const ws = this._requireWs();
    const waitFor = opts.waitFor ?? 'prompt.completed';
    const timeoutMs = opts.timeoutMs ?? DEFAULT_FRAME_TIMEOUT_MS;
    const submit = await this.http.submitPrompt(sid, body);
    const finalFrame = await ws.waitForFrame((f) => {
      if (f.type !== waitFor) return false;
      const payload = (f.payload as { promptId?: string; prompt_id?: string } | undefined) ?? {};
      const pid = payload.promptId ?? payload.prompt_id;
      return pid === submit.prompt_id;
    }, timeoutMs);
    return { prompt_id: submit.prompt_id, user_message_id: submit.user_message_id, finalFrame };
  }

  // ── internals ───────────────────────────────────────────────────────────
  private _requireWs(): WsClient {