import type { LanguageModelV3Middleware } from '@ai-sdk/provider';
import { createSmartAiCachingMiddleware } from './smartai.cache.js';
import type { ISmartAiCacheOptions } from './smartai.cache.js';

/**
 * Creates middleware that adds Anthropic prompt caching directives.
 * Marks the last system message and last user message with ephemeral cache control,
 * reducing input token cost and latency on repeated calls.
 */
export function createAnthropicCachingMiddleware(options: ISmartAiCacheOptions = {}): LanguageModelV3Middleware {
  return createSmartAiCachingMiddleware({ ...options, provider: 'anthropic' });
}