Orchestrate Nodes

Node orchestration defines how data flows through a workflow. EZChat Workflow Studio uses nodes and edges to form a graph. Each node handles one step, and each edge determines execution order and data flow.

Add Nodes

You can add nodes in these ways:

• Click Add Node from the left toolbar.
• Open the add node menu from an empty area on the canvas.

Currently supported nodes include:

Node	Usage
Start	Workflow entry point. Provides query and files.
LLM	Calls a language model to generate text or intermediate results.
Knowledge Retrieval	Retrieves relevant chunks from datasets.
End	Defines the final output template.
Agent	Uses a model and MCP tools to complete tasks.
Question Classifier	Classifies input into configured classes.
If / Else	Routes execution based on conditions.
HTTP	Calls external APIs.
Note Memo	Adds notes on the canvas and does not participate in execution.

Connect Nodes

After connecting nodes with edges, downstream nodes can use outputs from upstream nodes. The settings panel generates selectable variables based on upstream nodes, for example:

Upstream node	Available variables
Start	query, files
LLM / Agent	text, usage, model
Question Classifier	class_id, class_name, keywords
Knowledge Retrieval	documents
HTTP	status_code, body, headers

These variables can be used in prompts, condition checks, knowledge retrieval queries, or final output templates.

Common Canvas Actions

• Pointer mode: Select, move, and configure nodes.
• Hand mode: Pan the canvas.
• Organize: Automatically arrange the workflow layout.
• Undo / Redo: Undo or redo canvas changes.
• Zoom / Mini map: Zoom and navigate quickly.
• Export: Export the current view or the full workflow as PNG, JPEG, or SVG.

Design Recommendations

• Start from the Start node, confirm input fields, then add processing nodes step by step.
• Use clear labels for every node so trace logs and maintenance are easier.
• First run a simple Start -> LLM -> End flow, then add retrieval, branches, or APIs.
• After adding branches, test success, failure, and fallback cases.