import type { OutputLine } from "./types.js";
export declare function ensureSessionDir(sessionId: string): void;
export declare function appendOutput(sessionId: string, entry: OutputLine): {
    lines: number;
    bytes: number;
};
export declare function removeSessionDir(sessionId: string): void;
/**
 * Read output.jsonl starting from a line offset.
 * Returns lines as raw JSON strings (one per line).
 */
export declare function readOutputLines(sessionId: string, offset: number): string[];
/**
 * Tail output.jsonl with follow mode.
 * Calls `onLine` for each new line. Resolves when the session reaches a terminal state
 * (checked via `isTerminal` callback), when a `turn_end` meta line is emitted,
 * or when the AbortSignal fires.
 */
export declare function tailOutput(sessionId: string, offset: number, onLine: (line: string) => void, isTerminal: () => boolean, signal: AbortSignal): Promise<void>;