import type { GitRepository, GitRunner, HistoryLoadResult, NavigationState, SessionReader } from "./types.js";
export declare function historyDirectory(repository: GitRepository): string;
export declare function historyPath(repository: GitRepository, sessionId: string): string;
export declare function tombstonePath(repository: GitRepository, sessionIdOrHash: string): string;
export declare function reconstructSessionHistory(reader: SessionReader): NavigationState;
export declare function expireGitSessionHistories(repository: GitRepository, git: GitRunner, retentionDays: number, activeSessionHashes: ReadonlySet<string> | (() => ReadonlySet<string>)): Promise<void>;
export declare class SessionHistoryStore {
    private readonly sessionId;
    private readonly repository;
    private readonly git;
    constructor(sessionId: string, repository: GitRepository, git: GitRunner);
    load(reader: SessionReader): Promise<HistoryLoadResult>;
    /** Rewrites the stored document with the original (unmapped) checkpoints
     *  and a fresh lastAccessedAt, preserving schema migration. Skips the write
     *  when a tombstone appeared mid-load so a completed expiration is never
     *  resurrected. */
    private refreshStoredTimestamp;
    save(state: NavigationState): Promise<void>;
}