Optionalmeta: { assignee?: string; by?: string; priority?: "high" | "medium" | "low" }Optionaloptions: { openOnly?: boolean }Optionaloptions: { openOnly?: boolean }Mentions array matching render() output.
Ready-to-send checklist text (☐/☑, @assignees).
Optionaloptions: { title?: string }One-line summary: '3/5 selesai (1 telat ⏰)'.
Set (or clear with null) a task deadline.
Check off by 1-based position or id.