import { LanguageModel } from 'ai';
/**
 * Instantiates the appropriate Vercel AI SDK language model for the given provider.
 *
 * @param provider    - Normalised (lowercase) provider name
 * @param apiKey      - Provider API key
 * @param model       - Model ID to use
 * @param _temperature - Unused here; temperature is passed to generateText at call time
 * @returns A LanguageModel instance, or `null` for an unrecognised provider
 */
export declare function createLLMProvider(provider: string, apiKey: string, model: string, _temperature: number): LanguageModel | null;