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Variables are {name} tokens you embed in node prompts, the welcome message, or edge conditions. At call time, the platform substitutes real values from context_data (the data passed when the call was created or filled in by inline data extraction). In the editor, the Variables panel lets you set test values so the validation and test features use realistic content.

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Using variables in content

Place a {variable_name} token anywhere in a node prompt, the welcome message, or an edge condition. The token is replaced at runtime with the corresponding value from context_data. Welcome message:
Node prompt:
Edge condition (Intent):
Variables in expression conditions (Rule edges) reference context variables by name without braces. The braces syntax {name} is only for text substitution in prompts and messages.

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The Variables panel

Variables panel open showing auto-discovered tokens as labelled input fields
Click Variables in the toolbar to open the variables panel. The panel automatically discovers every {variable_name} token in:
  • All node prompts
  • Node examples (multilingual)
  • Edge condition text
  • Edge parameters
  • The welcome message
Each discovered variable appears as a labelled input field. Set any values you want to use during validation checks and test runs. Values set in the variables panel are saved locally per agent (they don’t affect the saved agent payload). They persist across editor sessions in your browser.

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Expression variable types

The Variables panel also shows a second section: Expression variable types. For every variable referenced in a Rule (Expression) transition condition, you can declare its type — string, number, boolean, or auto. Declared types coerce the value before condition evaluation. Undeclared variables use automatic type inference. This section only appears when your graph has at least one Expression transition.

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Built-in variables

These variables are populated automatically by the platform at call time. You don’t need to pass them in context_data. They are available in expression conditions and can be referenced in prompts. See Edges & routing for the full reference including numeric types for use in expression conditions.

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Variables from inline data extraction

Transitions can capture values from the user’s reply and store them as variables. After a transition fires and captures order_id, that value becomes available in downstream node prompts as {order_id} and in expression conditions as the variable order_id. See Inline data extraction for how to set this up on a transition.