已经给国内的一个头部上门服务公司做了一个智能客服软件，想看看是否是否可以迁移到dify，如使用dify知识库，使用dify工作流定义可嵌套的多伦对话。
请问dify支持自定义节点和工作流嵌套吗？
Try Workflow Tools.
Publishing Workflows as Tools
You can publish a Workflow in Dify as a tool now. Any AI agent or another workflow can invoke the workflow automatically. This is suitable for scenarios where a workflow needs to be encapsulated as input. For example, wrap a workflow that provides personalized customer service recommendations for an order processing Agent to call when needed; or a workflow that automatically executes data collection, cleaning, analysis, and visualization steps, which can be used as an analysis tool by a marketing Agent.
Workflow Major Update: Iteration, Parameter Extractor and Publish Workflow as a Tool - Dify Blog
Workflow Tools
Publish complex workflows as reusable tools. This creates modular building blocks that can be shared across different applications, promoting code reuse and simplifying maintenance.