/**
 * JSONL-based persistent session storage.
 *
 * Layout: ~/.mcp-codex-subagent/sessions/{sanitized-cwd}/{session-id}.jsonl
 *
 * JSONL format:
 *   Line 1: {"type":"meta","id":"...","createdAt":"...","codexConversationId":"..."}
 *   Line N: {"type":"turn","prompt":"...","response":"...","timestamp":"..."}
 */
import type { SessionStorage, SessionData, ConversationTurn } from './storage.js';
export declare class FileSessionStorage implements SessionStorage {
    private readonly maxSessionIdLength;
    private readonly sessionIdPattern;
    createSession(): string;
    ensureSession(sessionId: string): void;
    getSession(sessionId: string): SessionData | undefined;
    updateSession(sessionId: string, data: Partial<SessionData>): void;
    deleteSession(sessionId: string): boolean;
    listSessions(): SessionData[];
    addTurn(sessionId: string, turn: ConversationTurn): void;
    resetSession(sessionId: string): void;
    setCodexConversationId(sessionId: string, conversationId: string): void;
    getCodexConversationId(sessionId: string): string | undefined;
    private cleanupExpired;
    private enforceMaxSessions;
}
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