export interface TurnOutcome {
    /** A reply/reply-document tool_use appeared in the turn. */
    replied: boolean;
    /** Text of the end_turn assistant message ('' when none / not yet reached). */
    finalText: string;
    /** The turn reached an assistant end_turn. */
    reachedEndTurn: boolean;
}
/** Fold one turn's JSONL line strings into the delivery decision. Pure. */
export declare function reduceTurnFromLines(lines: string[]): TurnOutcome;
export type OnTurnEnd = (outcome: TurnOutcome) => void;
/**
 * Tail `jsonlPath` from `startOffset` for the life of the session, invoking
 * `onTurnEnd` once for every assistant end_turn with that turn's outcome
 * (Task 839). Unlike a one-shot follow it does not stop at the first end_turn:
 * it segments the JSONL at each end_turn so a follow-on turn produced from a
 * mid-turn-queued message is reported too. The process dies with the session,
 * so there is no per-turn timeout; the promise resolves only when the file
 * becomes unreadable (mirrors watchForGrowth's stat-failure bail). Never rejects.
 */
export declare function followTurnEnds(jsonlPath: string, startOffset: number, onTurnEnd: OnTurnEnd): Promise<void>;
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