s', is_object($modelOrConfig) ? get_class($modelOrConfig) : gettype($modelOrConfig)));
        }
    }
    /**
     * Configures PromptBuilder based on model/config parameter type.
     *
     * @param Prompt $prompt The prompt content.
     * @param ModelInterface|ModelConfig|null $modelOrConfig The model or config parameter.
     * @param ProviderRegistry|null $registry Optional custom registry to use.
     * @return PromptBuilder Configured prompt builder.
     */
    private static function getConfiguredPromptBuilder($prompt, $modelOrConfig, ?ProviderRegistry $registry = null): PromptBuilder
    {
        $builder = self::prompt($prompt, $registry);
        if ($modelOrConfig instanceof ModelInterface) {
            $builder->usingModel($modelOrConfig);
        } elseif ($modelOrConfig instanceof ModelConfig) {
            $builder->usingModelConfig($modelOrConfig);
        }
        // null case: use default model discovery
        return $builder;
    }
}