import { GuardConfig } from './types';
export declare abstract class BaseGuard {
    protected provider?: GuardConfig['provider'];
    protected apiKey?: string;
    protected model?: string;
    protected baseUrl?: string;
    protected thresholdScore: number;
    protected collectMetrics: boolean;
    protected customRules?: GuardConfig['customRules'];
    protected validTopics?: string[];
    protected invalidTopics?: string[];
    constructor(config?: GuardConfig);
    protected abstract getSystemPrompt(): string;
    protected llmResponse(prompt: string): Promise<string>;
}