Variable Fill

Variables control how data moves through an agent flow. For every input variable on a node, choose the fill method that supplies its value at runtime.

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Fill methods

Beam provides seven fill methods:

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Configure a variable

1. Open the agent’s Flow.
2. Select the node that needs the input.
3. In the node sidebar, open Parameters.
4. Under Input variables, select the variable’s current fill method.
5. Choose the fill method that matches the source of the value.

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Choose the right fill method

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How each fill method works

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Auto fill

Use Auto fill when Beam can determine the value without an explicit instruction. The node fills the value automatically from the available execution context.

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Prompt fill

Use Prompt fill when the node needs your instructions for how to produce the value. Write a clear description of the required value and format in the variable’s value field.

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Linked fill

Use Linked fill to pass an earlier node’s output to a later node. The source node must run before the node that consumes the linked value.

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Static fill

Use Static fill for a value you enter once and want to keep the same for every execution, such as a fixed identifier or configuration value.

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User fill

Use User fill when the person running the task must provide the value at runtime.

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Memory fill

Use Memory fill when a node needs knowledge from the agent’s Memory module. Add documents in Configuration → Memory, then use Memory fill to look up a value from that knowledge base. See Core Concepts for how agent memory works.

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Attachment fill

Use Attachment fill when the node needs to extract a value from a file attached to the task.

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Next steps