Variables Block

The Variables block assigns values to named variables that persist for the lifetime of the workflow run. Reach for it when you need to define reusable values once and reference them across downstream blocks using the standard {{block_id.output.variables.varName}} syntax.

Overview

When to Use

• Define constants or configuration values once and reuse them in multiple downstream blocks.
• Capture and rename intermediate results into clearly named variables for readability.
• Centralize values (API endpoints, thresholds, labels) so they're easy to update in one place.
• Build a small set of run-scoped variables that several branches of the workflow depend on.
• Stage computed or referenced values for later blocks without re-deriving them.

Configuration

Variable Assignments

A table of Name / Value pairs. Each row defines one variable: the Name column is the variable key, and the Value column is its assigned value (a literal or a {{...}} reference to another block's output).

Inputs & Outputs

• Inputs: assignments (json) — array of {name, value} pairs defining the variables to set.
• Outputs: variables (json) — map of all variable names to their assigned values; count (number) — number of variables assigned.

Tools

The Variables block does not call any external tools. It is handled entirely by the built-in variables executor handler, which resolves the assignments table and writes values into the workflow's run-scoped variable store.

YAML Example

set_vars:
  type: variables
  name: "Variables"
  inputs:
    assignments:
      - name: "greeting"
        value: "Hello"
      - name: "userId"
        value: "{{start.input.id}}"
  connections:
    outgoing:
      - target: next-block-id