Are there any costs associated with creating and using custom agents in test instances?

We would like to customize some agents in the test environment to address certain business scenarios. We would like to confirm that this does not entail any additional costs or licensing requirements for the customer, given that these changes will not be deployed to production.

We would appreciate it if you could confirm whether the use of these features (specifically the creation and testing of custom agents in Agent Studio in test environments) could result in any additional charges on the client’s license, or if this would only apply upon deployment to production.

Please your comments, thanks!