Method sendPlaceholderMessage

src/runtime/adapters/slack.ts:543–553

(
    client: any,
    route: SlackRoute,
  )

    await this.sendSafe(client, route, text);
  }

  private async sendPlaceholderMessage(
    client: any,
    route: SlackRoute,
  ): Promise<SlackPostedMessage | null> {
    try {
      return await this.sendWithRetry(client, route, PROCESSING_MESSAGE);
    } catch (err) {
      console.error("[Slack] Failed to send placeholder message:", err);
      return null;
    }
  }

  private async sendWithRetry(