import type { Api, Model } from '@earendil-works/pi-ai';
export interface PromptCachePolicy {
    mode: 'off' | 'auto';
    lifetime: 'short' | 'long';
}
export type PromptCacheProviderMode = 'none' | 'implicit' | 'explicit' | 'managed';
export interface PromptCachePlan {
    policy: PromptCachePolicy;
    providerMode: PromptCacheProviderMode;
    cacheKey?: string;
}
export declare const DEFAULT_PROMPT_CACHE_POLICY: PromptCachePolicy;
export declare function resolvePromptCachePolicy(policy?: Partial<PromptCachePolicy>): PromptCachePolicy;
export declare function isOfficialOpenAIModel(model: Model<Api>): boolean;
export declare function resolvePromptCacheProviderMode(model: Model<Api>, policy: PromptCachePolicy): PromptCacheProviderMode;