/**
 * LLM Configuration Service Implementation.
 *
 * Reads/writes LLM configuration from PreferenceStore with `llm:*` keys.
 * Environment variables take precedence over stored preferences.
 *
 * Merge order: defaults <- preferences <- environment variables.
 *
 * Part of Phase 6A: LLM Provider Abstraction Layer.
 */
import type { ILlmConfigService } from '../../domain/interfaces/ILlmConfigService';
import type { IPreferenceStore } from '../../domain/interfaces/IPreferenceStore';
/**
 * Create an LLM configuration service.
 *
 * @param preferenceStore - Preference store for persisting config
 */
export declare function createLlmConfigService(preferenceStore: IPreferenceStore): ILlmConfigService;
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