import type { ChatMessage, ProviderId } from "../types.js";
import type { CachePolicySpec } from "./provider-profile.js";
export declare function cachePolicyFields(input: {
    provider: ProviderId;
    model: string;
    messages: readonly ChatMessage[];
    policy: Pick<CachePolicySpec, "kind" | "affinityField" | "isolationField">;
    purpose?: string | undefined;
}): Record<string, string>;