Idempotency

A property of an action where running it twice with the same input has the same effect as running it once, so a retry after a timeout can't cause double damage.

📌 Example: Charging a customer with an idempotency key means a retried payment request never bills them twice.

• depends on Retry LogicSafe retries require the underlying action to be idempotent, or a retry can cause duplicate effects.