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asana.onTaskUnassigned watches one Asana resource. Runs when the task assignee field is cleared.
automations/asana-on-task-unassigned.automation.ts
Provide resourceId. Optional static account defaults to the project binding. Returns a signal containing the affected task reference and the compact normalized webhook event. The event has resourceType: "task" and action: "changed"; field-specific triggers also narrow event.change.field and event.change.action. Call the corresponding get action when you need full current resource state.