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Is your feature request related to a problem?

When I was creating a websearch agent, I found that calling the model's rewrite node and keyword node returned data that included not only the result data, but also what the model was thinking about. This results in unwanted errors in subsequent search nodes and crawler nodes

Describe the feature you'd like

I'd like to be able to edit the model's system prompt word when the agent is created, instead of only being able to edit him when generating the answer, as is currently the case. Or would like to be able to add a node for parsing strings (where the user can write regular expressions for example)

Describe implementation you've considered

No response

Documentation, adoption, use case

Additional information

No response