LLM - Add n-shot prompting in dify (pdf)

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

Hi,

I'm using dify and i would like to improve my workflow by adding a 1-shot prompting.

The workflow is very simple

dify workflow

Upload file (pdf)
Extract data from pdf -> output "text"
Send output "text" to ollama model & Ask question (extract invoice id, customer reference etc..)
Return json

For the moment, it is OK and the result is as expected but i would like to into the context a sample file IN and sample Output json.

I have tried to add 2 variables in first step (sample file & output sample file) but i obtain a issue (file required (event i upload it), or error "type unknown")

Is my idea correct? Is somebody has an idea to manage it?

thanks

2. Additional context or comments

No response