How can you auto assign tasks and stories to the current user once they drag a sub-task over to in progress or done?
We want the tasks and stories to be unassigned until they are picked up.
I'd suggest some app adding additional (needed) post-functions to Jira, e.g. Jira Misc Workflow Extensions, Scriptrunner or Jira Workflow Toolbox (our product just to be honest here!). With that you could for example use an available post-function Set field as function of other fields and reference the parent issue's assignee field to be set with the value of the currentUser. Maybe even add some more logic depending on your workflow, but nothing too special. One way to solve that. :)
You would need an add-on like Power Scripts, Adaptivist ScriptRunner or Automation for Jira.
If you had Power Scripts you could create a post-function on the required transition with a script like this
%parent%.assignee = currentUser()
This script would assign the current user to the parents issue. You can read more about Power Scripts here:
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