Include specific data (fix data) in summarize chain ouput

[lukeydip]

I’m building a workflow to summarize slack threads. In the output of the summerization chain node, I would like to include specific data from the input data so that I can map the response to an item from the input. Is this possible? I can’t figure out how to change the structure of the response, and there is nothing in the response that I can use to merge the input and output. Perhaps there is another stratgey?

Specifically, in my case, I have an input

"parent": {
  {
    "messageText": "Hey, have you ever visited the Egyptian pyramids?",
    "userId": "a user id",
    "timestamp": "1743511848.919049"
  }
},
"replies": [ {a reply}, {another reply}, ... ]

and an output

{
  "response": {
    "text": " Jamie and Alex discuss the mystery and history of the Egyptian pyramids, including the construction and theories involving the use of ramps, despite certain unknowns. "
  }
}

I want the timestamp included in the response.

Thanks in advance

[Olek]

You could use Merge node in Combine by position mode.

If this answers your question, please mark this post as a Solution.

[lukeydip]

Thanks @Olek for your response. I have tried combine which will do for a now, however can we be sure of the order? I think probably yes, n8n nodes seem to preserve the order, however I’ve read anything in the documentation to that effect.

[Olek]

The algo behind n8n is deterministic.

Just be aware that the AI tools can refer the first input item only. So, employ Loop with batch size 1 whenever you want the AI agent node to process multiple items, to remain on the safer side.