/**
 * Enforce RPM rate limit for Gemini free tier.
 * Waits the minimum delay between requests: (60s / RPM) + 100ms safety buffer.
 * No-op if rate limiting is disabled.
 */
export declare function enforceRateLimit(model: string, enabled: boolean): Promise<void>;
/** Reset rate limiter state (for testing) */
export declare function resetRateLimiter(): void;
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