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    interface WithLLM {
        model: DecisionModel | LanguageModel;
    }

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    model: DecisionModel | LanguageModel

    Either a regular AI SDK LanguageModel, or an AI SDK DecisionModel (e.g. openai.decisionModel("gpt-6-luna")) which classifies without generating text and therefore cannot produce an explanation. With a decision model, label probabilities are returned in the result's metadata.probabilities.