Description of problem: So I got a hint about the taskaction.files API method reading beaker's client side code and went over to the docs to read more about it: https://beaker-project.org/docs/server-api/xmlrpc.html The docs only mention that recipe.files() is deprecated since version 0.9.4: Use taskactions.files() instead but no description of the actual method or its parameters.
http://gerrit.beaker-project.org/5422
https://beaker-project.org/docs-release-23/server-api/xmlrpc.html#bkr.server.task_actions.taskactions.files
Beaker 24.0 has been released.