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Idempotency
A property where running the same operation multiple times produces the same result as running it once.
An idempotent automation can safely retry a failed step without creating duplicate side effects — e.g. re-sending a webhook shouldn't create a second invoice. It's a core reliability property for any automation that has to survive network failures or retries, which is to say, all of them eventually.
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Where this shows up in practice
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