/**
 * Abstract LLM provider interface.
 * Each provider implements one method: complete(prompt, schema) → parsed JSON or null.
 */
export interface LLMProvider {
    name: string;
    complete(prompt: string, schema: Record<string, unknown>): Promise<unknown | null>;
    isAvailable(): Promise<boolean>;
}
export declare class LLMService {
    private provider;
    constructor(provider: LLMProvider | null);
    /** Returns the underlying provider for advanced use (e.g. LLMJudge reranker). */
    getProvider(): LLMProvider | null;
    private call;
    expandQuery(query: string): Promise<{
        expanded: string[];
        original: string;
    } | null>;
    generateTitle(content: string): Promise<string | null>;
    generateTags(content: string): Promise<string[] | null>;
    explainContradiction(entryA: string, entryB: string): Promise<{
        conflict: string;
        merged_content: string;
    } | null>;
    summarize(content: string): Promise<{
        summary: string;
        key_terms: string[];
    } | null>;
    synthesizePage(existingPage: string, newObservations: string, entityName: string): Promise<{
        synthesis: string;
    } | null>;
}
//# sourceMappingURL=llm-provider.d.ts.map