static createOrCheckFlowsDir() {
    try {
      if (fs.existsSync(AgentFlows.flowsDir)) return true;
      fs.mkdirSync(AgentFlows.flowsDir, { recursive: true });
      return true;
    } catch (error) {
      console.error("Failed to create flows directory:", error);
      return false;
    }
  }
Ensure flows directory exists
@returns {Boolean} True if directory exists, false otherwise