We have a maniphest.custom-field-definitions set:
{ "kolab:ticket-type": { "name": "Ticket Type", "type": "select", "options": { "kolab:task": "Task", "kolab:epic": "Epic", "kolab:story": "Story" }, "default": "Task" }, "kolab:estimated-hours": { "name": "Estimated Hours", "type": "int", "caption": "Estimated number of hours this will take." } }
but the default does not seem to apply correctly (not as kolab:task and not as Task).