It can propose a task or deadline, a calendar event, a transaction, a dues payment, an Instagram task, or a programming event. Every one of those arrives as a card you read before anything happens.
- Nothing is written until a human approves. There is no setting that turns this off.
- You need the permission anyway. A proposal to log a transaction is only approvable by someone who could have logged it by hand.
- The card can't be tampered with. Its contents are signed by the server when it's drafted; a modified card writes nothing at all.
- The approval is recorded — what was proposed, who approved it, and when.