import type { LatencyMode, ReasoningEffort, SessionEvent, SessionModelAccountChoiceResponse } from "@opengeni/sdk";
import { type ClientOverride } from "../session-context.js";
import { type SessionEventFeedOptions } from "./internal.js";
/** Refresh when a turn actually admits — not on composer picker / queue-only changes. */
export declare function isLastStartedTurnPolicyEvent(event: Pick<SessionEvent, "type">): boolean;
export type LastStartedTurnPolicy = {
    model: string;
    reasoningEffort: ReasoningEffort;
    latencyMode: LatencyMode;
    turnId: string;
};
export type UseLastStartedTurnPolicyOptions = ClientOverride & SessionEventFeedOptions & {
    pollIntervalMs?: number | undefined;
    /** Project the last lease-backed serving model without changing the accepted policy. */
    includeServingModel?: boolean | undefined;
};
export type UseLastStartedTurnPolicyResult = {
    /** Null until some turn has durably emitted `turn.started`. */
    policy: LastStartedTurnPolicy | null;
    loading: boolean;
    error: Error | null;
    refresh: () => Promise<void>;
};
/** Never project an earlier turn's selection onto newly admitted work. */
export declare function withServingModel(policy: LastStartedTurnPolicy | null, serving: SessionModelAccountChoiceResponse["serving"]): LastStartedTurnPolicy | null;
/**
 * Model·effort·latency of the newest admitted turn (`turn.started`). This is
 * historical runtime truth for the session header — not the composer next-turn
 * picker and not the frozen session creation defaults.
 */
export declare function useLastStartedTurnPolicy(sessionId: string | null | undefined, options?: UseLastStartedTurnPolicyOptions): UseLastStartedTurnPolicyResult;