Append to List in Project Variables - Learn WorkflowDog

Append to List in Project Variables loads a stored list, adds the supplied values to its end, and saves the result under the same key. If the key does not exist, the action starts with an empty list.

Inputs

Input	Type	Required	Description
Key	String	Yes	Name of the project variable.
Values	Repeatable any	Yes	One or more values to append in order.

The action has no output. Use Get Project Variable afterward when the updated list is needed in the workflow.

The existing value must be a list. The action fails with Value is not a list for another type, or Variable is corrupted when the stored value cannot be read.

The value is shared by every workflow in the project. Simultaneous read-and-append operations can overwrite one another, so this action is not a transactional queue.