/**
 * Cache Optimizer: Structures content for prompt caching
 */
import type { CacheConfig, CachedContent, CacheMetrics } from './cache-types.js';
export declare class CacheOptimizer {
    private config;
    private metrics;
    constructor(config?: Partial<CacheConfig>);
    /**
     * Wrap optimized TOON content with cache-friendly structure
     */
    wrapWithCaching(toonContent: string, toolName: string, format: 'json' | 'csv' | 'yaml', originalTokens: number, optimizedTokens: number): CachedContent;
    /**
     * Create cacheable static prefix with TOON format instructions
     */
    private createStaticPrefix;
    /**
     * Format TOON output with metadata
     */
    private formatTOONOutput;
    /**
     * Format for Anthropic cache_control API
     */
    formatForAnthropic(cached: CachedContent): Array<{
        type: string;
        text: string;
        cache_control?: {
            type: string;
        };
    }>;
    /**
     * Format for OpenAI (structured but no explicit cache control)
     */
    formatForOpenAI(cached: CachedContent): {
        system: string;
        user: string;
    };
    /**
     * Get current cache metrics
     */
    getMetrics(): CacheMetrics;
    /**
     * Record a cache hit (when static prefix is reused)
     */
    recordCacheHit(savedTokens: number): void;
    /**
     * Record a cache miss (when static prefix is not cached)
     */
    recordCacheMiss(): void;
    /**
     * Update cache hit rate
     */
    private updateHitRate;
    /**
     * Reset metrics
     */
    resetMetrics(): void;
}
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