Passthrough (data)
Forwarding data from a prior step to a later step without modification. In n8n, the "Keep Only Set" option controls which fields are passed through and which are discarded keeping workflows clean and preventing unexpected data bleed between steps.
Expert insight
Passthrough data (fields carried through a workflow unchanged, just to be available at a later step) needs to be deliberately included in whatever data structure moves between steps, it's a common bug for a field to be present at step 2 but silently dropped by step 4 because an intermediate transformation only kept the fields it was actively using.
How PURIST uses this
This concept is built into every automation we deploy.
When PURIST builds your automation, Passthrough (data) is not an optional consideration it is part of the production standard. Our workflows are tested against edge cases, monitored 24/7, and built to handle what happens when things don't go as expected.
Every client workflow we deploy in the Data category is designed with this principle in mind from day one not added as an afterthought.
Complexity level
Anyone can understand this no technical background needed.
See it in action
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