export interface WorkerConversationFileRevision {
    readonly dev: bigint;
    readonly ino: bigint;
    readonly size: bigint;
    readonly mtimeNs: bigint;
    readonly ctimeNs: bigint;
}
export interface WorkerSessionFileHead {
    readonly revision: WorkerConversationFileRevision;
    readonly headerDigest: string;
    readonly entryDigest: string;
    readonly entryCount: number;
    readonly prefixDigest?: string;
}
export declare class WorkerConversationOwnershipError extends Error {
    constructor(message: string);
}
export declare function readWorkerConversationFileRevision(file: string): WorkerConversationFileRevision;
export declare function sameWorkerConversationFileRevision(left: WorkerConversationFileRevision, right: WorkerConversationFileRevision): boolean;
/**
 * Verify the exact bytes appended by SessionManager and advance the trusted raw-file head once.
 *
 * The caller must hold the canonical conversation lock. That advisory lock excludes every
 * supported writer, while revision/digest scans detect changes made between owned critical
 * sections and during cold opens. This bounded append check intentionally reads only the new
 * suffix: it cannot detect a noncooperating process rewriting an equal-length prefix inside the
 * locked append window without reintroducing an O(n) prefix scan or a second durable authority.
 */
export declare function advanceWorkerSessionHeadAfterOwnedAppend(sessionFile: string, previousHead: WorkerSessionFileHead, serializedEntry: string): WorkerSessionFileHead;
export declare function scanWorkerSessionFile(sessionFile: string, expectedSessionId: string, expectedCwd: string, prefixEntryCount?: number): WorkerSessionFileHead;
//# sourceMappingURL=worker-conversation-revision.d.ts.map