What does the Sub-Workflow Input node do?

It defines where a callable workflow starts. Each of its ports becomes an input on the Sub-Workflow node that calls the workflow. Inside, the value that arrives on a port flows to the nodes connected to that port.

How do I pair a Sub-Workflow Input with a Sub-Workflow Output?

Each Sub-Workflow Input gets a route ID when you add it. In the Sub-Workflow Output, choose that input under Paired Input Route. The pair forms one route through the workflow.

Can one workflow have several Sub-Workflow Input nodes?

Yes. Each input, paired with its own output, is a separate route through the workflow. The calling Sub-Workflow node chooses which route to use.

Which port types are there?

Text, Image, Video, Audio and Any. Any is the default. Choose the most specific type so that a wrong connection is caught early.

Does the Sub-Workflow Input node cost credits?

No. It only passes values into the workflow and is free.

Sub-Workflow Input node — define the typed inputs of a reusable workflow

Define the inputs of a workflow that other workflows call as a Sub-Workflow. Each port has a name and a type, and pairs with a Sub-Workflow Output by route.

The Sub-Workflow Input node defines the inputs of a workflow that other workflows call through a Sub-Workflow node. Each port has a name and a type, and becomes an input on the calling node. Inside the workflow, the value that arrives on a port flows to the nodes you connect to it. Pair every Sub-Workflow Input with a Sub-Workflow Output to complete the route.

When to use it

You want an image processing pipeline that other workflows can call.
You want a video composition workflow that accepts different media each time it is called.
You want several entry points into one workflow, one per route.

Quick start

Add the node

Open the workflow that other workflows will call. Press Tab on the canvas and choose Automate › Workflows › Sub-Workflow Input. The node receives a route ID automatically.

Define the ports

Open the settings panel. Under Ports, name the first port and choose its type. Click Add for each further input, for example "Reference" as an image and "Prompt" as text.

Connect the ports

Each port has its own output on the right of the node. Connect each one to the nodes that use it.

Pair it with an output

Add a Sub-Workflow Output, choose this input under Paired Input Route, and save the workflow.

When you use Create empty sub-workflow in a Sub-Workflow node, the new child workflow already contains a paired Sub-Workflow Input and Sub-Workflow Output.

Inside a callable workflow, the Prompt and Reference ports feed Generate Image, and the Sub-Workflow Output returns the image to the caller.

Outputs

The node has one output per port, colored by the port's type. When a Sub-Workflow node runs this route, each output carries the value that the caller connected to the matching input.

Settings

Setting	What it does
Label	The route's name. The calling Sub-Workflow node shows it in its Route list.
Route ID	The identifier that pairs this input with a Sub-Workflow Output. It is created automatically and cannot be edited. If it is ever empty, click Generate.
Ports	The inputs of the route. Each port has a name and a type: Text, Image, Video, Audio or Any. A new node has one port, "Input", of type Any. Add adds another port. The last port cannot be removed.

A copy of a Sub-Workflow Input receives a new route ID, so the copy starts a separate route.

Rules

When you save the workflow, Nodaro checks two rules. Every Sub-Workflow Input needs a Sub-Workflow Output with the same route ID, and no two Sub-Workflow Input nodes can share a route ID. A save that breaks a rule is refused, and each problem is listed.

Credits

The Sub-Workflow Input node is free.

Tips

Name ports for the caller. "Background Video" or "Narration Text" tells the person who uses the workflow what to connect.
Use specific types. A specific type, such as Image, catches a wrong connection early. Any accepts everything.
One port per value. When the workflow needs an image and a prompt, give it two ports.

Sub-Workflow Input