Merge Output Node

Definition

The Merge Output node is one of the most commonly used variable merging and data aggregation nodes in a workflow. Its purpose is to combine the outputs, variables, text, and content from multiple upstream nodes into a single unified result.

Use Cases

• Combine "user question" + "knowledge base answer" + "conversation history" into one string
• Merge results from multiple tool nodes (search, query, generation)
• Format variables for use by a downstream LLM or reply node
• Standardize output format to prevent downstream nodes from receiving messy data

Configuration

Input Variables — Add input variables (arg1, arg2, arg3, ...)

Code — Reference variables using in the code area and arrange the layout

Output Variable — Outputs a string type. The node automatically concatenates all input content into the final output, so the result has a single copy button.