I find the UI Action framework quite convoluted. Between the original UI Action, then now Workspaces adding on UX Form Actions, Action Assignment, Action Payload Definition and more.
All I want to do is add a small amount of behavior for a specific HR Service, to require a new custom field on close (Workspace UI Action).
I tried adding an onSubmit client script, but it was unable to prevent the submission from Workspace. I tried updating Workspace Client Script of the OOTB script, but it also didn't have any impact.
