import { Clock, Effect } from "effect";
import { Prompt } from "effect/unstable/ai";
import type { ModelCallPurpose } from "./model-telemetry.js";
/** @experimental The last-send gap above which the conversation boundary escalates to the one-hour cache. */
export declare const conversationEscalationMillis: number;
/** @experimental Mutable last-send clock driving conversation cache escalation. */
export interface SendClock {
    readonly idleSince: (now: number) => number | undefined;
}
/** @experimental One run's last-send tracker; gaps above the escalation threshold move the conversation boundary to one hour. */
export declare const makeSendClock: () => SendClock;
/** @experimental Mark one wire send with provider cache breakpoints derived from the run's send clock. */
export declare const withWireCache: {
    (prompt: Prompt.Prompt, purpose: ModelCallPurpose, sendClock: SendClock): Effect.Effect<Prompt.Prompt, never, Clock.Clock>;
    (purpose: ModelCallPurpose, sendClock: SendClock): (prompt: Prompt.Prompt) => Effect.Effect<Prompt.Prompt, never, Clock.Clock>;
};
interface WithCacheBreakpoints {
    (prompt: Prompt.Prompt, purpose: ModelCallPurpose, idleMillis: number | undefined): Prompt.Prompt;
    (purpose: ModelCallPurpose, idleMillis: number | undefined): (prompt: Prompt.Prompt) => Prompt.Prompt;
}
/** @experimental Provider cache breakpoints derived for one send; markers are never persisted. */
export declare const withCacheBreakpoints: WithCacheBreakpoints;
export {};