But in your case, I think you are better off using the transcript variable from the Summary Agent.

To use it, go to the Agents tab (robot head) and enable the Summary

Now go to your AI Task and replace the current input with:

Conversation transcript: {{conversation.SummaryAgent.transcript}}

What's the difference between the two? Where can I find more info about the fullHistory one?

This summary agent also makes available a summary variable, that is a high-level overview of the conversation.

Now the fullHistory variable, is a custom variable you can create to store the complete history of the conversation, but it takes some advanced steps to set it up

You will need to add a ,Before incoming hook (with any name) with the code:

js
  if (!event.state.session.fullHistory) {
    event.state.session.fullHistory = ''
  }
  event.state.session.fullHistory = event.state.session.fullHistory + `user :  ${event.payload.text}` + '\n'

And also a before outgoing hook :

js
  if (!event.state.session.fullHistory) {
    event.state.session.fullHistory = ''
  }
  event.state.session.fullHistory = event.state.session.fullHistory + `bot : ${outgoingEvent.payload.text}` + '\n'

Then you can access the full history at any time with the variable {{event.state.session.fullHistory}}

@high-house-27719, this is how you use the fullHistory variable