import type { TurnRecorder } from '../../manager/session/turn-recorder.js';
import type { SessionEvent, Turn } from '../../types/session/index.js';
import { type SessionLogCursor, type SessionLogReplay } from '../../types/session/log-cursor.js';
import { type SessionRecord } from '../../types/session/records.js';
import type { QueryParams } from './index.js';
import type { PreparedTurn } from './prepare-turn.js';
/**
 * The turn that was cancelled before it started.
 *
 * Attachment materialization happens before the turn's context exists, and
 * a cancellation observed there still belongs to a turn: it is recorded and
 * reported like any other, without any of the authority-bearing work —
 * prompt contributions, host callbacks, tools, plugins, sandbox, guardrails,
 * advisors, providers — that a turn which is allowed to proceed would do next.
 */
export declare function settlePreStartCancellation(params: QueryParams, prepared: PreparedTurn): AsyncGenerator<SessionEvent, Turn>;
/**
 * Hand a returning consumer what it missed, or tell it why it cannot have it.
 *
 * Yields NOTHING on a refusal. A partial catch-up is the failure this exists to
 * prevent: a consumer that receives some of the gap folds it into its state and
 * cannot tell the state is wrong, where one that receives an explicit
 * `unavailable` re-derives from the log and is right. The turn continues
 * either way — a stale cursor belongs to the client, and must not be able to
 * stop the work.
 *
 * What is yielded is the live events the missed records stand for; the
 * record-only types (messages, checkpoints, decisions) are in the log and not
 * on the stream.
 */
export declare function catchUpFromCursor(recorder: TurnRecorder, cursor: SessionLogCursor, onEventReplay: ((replay: SessionLogReplay) => void) | undefined, onReplayObserverError: (error: unknown) => void): AsyncGenerator<SessionEvent, void>;
/** The live event a persisted-event record stands for; `undefined` for a record-only type. */
export declare function liveEventOfRecord(record: SessionRecord): SessionEvent | undefined;
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