import type { Message, ProviderRequest } from "@arnilo/prism";
/**
 * Whether Anthropic content `cache_control` markers may be emitted.
 * Default featured models declare `cache.kind: "cache_control"`; callers can force
 * `cache.mode: "on"` or disable via `"off"` / `cacheRetention: "none"`.
 */
export declare function anthropicCacheEnabled(request: ProviderRequest): boolean;
/**
 * Apply Anthropic `cache_control` markers only to selected Prism breakpoints.
 * With no breakpoints, no markers are emitted (implicit caching still applies upstream).
 */
export declare function applyAnthropicCacheControl(request: ProviderRequest): readonly Message[];