import { BaseGuardrailPlugin } from './base-plugin.js';
import { GuardrailPhase, GuardrailContext, GuardrailResult } from '../types.js';
/**
 * Rate limiter plugin - limits requests per minute/hour
 */
export declare class RateLimiterPlugin extends BaseGuardrailPlugin {
    name: string;
    phases: GuardrailPhase[];
    private requestsPerMinute;
    private requestsPerHour;
    private perProvider;
    private burstAllowance;
    private requestHistory;
    initialize(config: Record<string, unknown>): Promise<void>;
    execute(phase: GuardrailPhase, context: GuardrailContext): Promise<GuardrailResult>;
    /**
     * Get current request counts (for testing/monitoring)
     */
    getRequestCounts(key?: string): {
        lastMinute: number;
        lastHour: number;
    };
    /**
     * Reset request history (for testing)
     */
    reset(): void;
}
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