LinearLabelAddedAgenticWorkflowTrigger

Optional per-trigger task/instruction prompt. When set, it is rendered with the same {{variable.name}}Copy substitution as spec.prompt.userCopy and used as the task turn for invocations from this trigger: the kickoff framing when the trigger spawns a new agent, or the event framing when it continues an existing one. When omitted, the automation-level spec.prompt.userCopy (on spawn) or a connector-default event summary (on continue) is used instead. The automation-level standing prompt is injected only once, on spawn, and is not re-sent on continue.