Reversibility

The degree to which a completed payment can be undone or recovered after it has been sent, ranging from a strong, legally enforceable right to a real recovery process (as with a properly reported unauthorized ACH transfer) down to a complete technical and legal impossibility (as with a confirmed cryptocurrency transaction or cash handed to a courier).

How easily an action the agent takes can be undone. A draft is reversible (discard it); a sent message, posted statement, executed payment, or deleted record may be irreversible. Often the deciding factor in a delegation, because an irreversible action has no undo when the agent is wrong.

Whether a wrong action, once taken, can be caught and undone before it causes further harm. A low-reversibility action combined with no human checkpoint is the highest-risk combination the actions-versus-outputs test can surface, and is the exact shape of the Replit database deletion.

The degree to which an action's effects can be undone. Full (a deletable draft), partial (a clawback-able refund), or none (a sent email, an external wire, a physical or rights-affecting act). Lower reversibility pushes toward in-the-loop.

the property, delivered by incremental patterns like the strangler fig, that a failed change can be undone by routing a single migrated capability back to the still-running old system, rather than losing the whole business at once.