import { Session } from "../../internal/harness.js";
import type { SessionMetadata, SessionRepo, SessionTreeEntry } from "../../internal/harness.js";
export declare class FileSessionRepo implements SessionRepo {
    private readonly dir;
    private readonly tmpDir;
    constructor(root: string);
    private pathFor;
    /** Read + torn-tail-recover a session file into (meta, entries); a missing file → not_found. */
    private read;
    private storage;
    create(options?: {
        id?: string;
    }): Promise<Session>;
    open(metadata: SessionMetadata): Promise<Session>;
    list(): Promise<SessionMetadata[]>;
    delete(metadata: SessionMetadata): Promise<void>;
    fork(sourceMetadata: SessionMetadata, options?: {
        entryId?: string;
        position?: "before" | "at";
        id?: string;
    }): Promise<Session>;
    /** 2c session-sync ([275], the FILE half of [266]②): the FULL oldest-first log for export. The file backend
     *  has NO F3 floor — `read` returns EVERY persisted entry (`id`/`parentId` verbatim) — so this is the complete
     *  log, BYPASSing any bounded tail (matches `InMemorySessionRepo.exportEntries`). Missing file → not_found. */
    exportEntries(sessionId: string): Promise<SessionTreeEntry[]>;
    /** 2c session-sync ([275]): import a verbatim log into `sessionId`. The single fail-closed invariant gate runs
     *  FIRST ({@link validateEntriesForImport}); `owner` is a durable multi-tenant concept the local file backend
     *  has no field for (accepted, unused — same as `InMemorySessionRepo`). Writes the WHOLE file (meta + entries)
     *  atomically via tmp→fsync→rename — the rename is the commit point, so a crash leaves either nothing or an
     *  orphan temp, never a partially-imported session (mirrors `fork`). An existing session is REPLACED (the
     *  orchestrator's importSession owns the already-exists policy, same as InMemory's overwrite). */
    importEntries(sessionId: string, owner: string | undefined, entries: SessionTreeEntry[]): Promise<void>;
}
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