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Merges the transformer output with the input entity. Use this step when you want to run a transformer step but keep the original item’s data alongside its result, instead of replacing it. The chosen step runs on each item, then a template controls how that step’s output is combined back with the item it started from, so you can enrich an item with new values while keeping everything it already had.

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This step merges each item with the result of a transformer step as it passes through a route, so it runs as part of a route rather than on its own. A configuration that runs a step and merges its full output back into the original item looks like this: With this configuration, each item is processed by the chosen step and the step’s output is merged back into the original item, so the result keeps the input’s data together with whatever the step produced.