export declare const DESIGN_RESOURCE_RECOVERY_ROOT = "tmp/ty-context/design-resource-recovery";
export interface RecoveryFileSnapshot {
    relative: string;
    absolute: string;
    bytes: Buffer;
    raw_byte_digest: string;
    mode: number;
}
export declare function recoveryCheckpointRelativePath(sessionId: string): string;
export declare function readRecoveryRepositoryFile(repository: string, locatorInput: string, label: string): Promise<RecoveryFileSnapshot>;
export declare function readRecoveryCheckpointFile(repository: string, sessionId: string): Promise<RecoveryFileSnapshot>;
export declare function createRecoveryCheckpointFile(repository: string, sessionId: string, bytes: Uint8Array): Promise<{
    path: string;
    raw_byte_digest: string;
    changed: boolean;
}>;
export declare function updateRecoveryCheckpointFile(repository: string, sessionId: string, bytes: Uint8Array, expectedCurrentDigest: string): Promise<{
    path: string;
    raw_byte_digest: string;
    changed: boolean;
}>;
export declare function atomicCasWrite(repository: string, relativeInput: string, bytes: Uint8Array, expectedCurrentDigest: string | null, mode: number): Promise<string>;
export declare function removeRecoveryCheckpointFile(repository: string, sessionId: string, expectedDigest: string): Promise<{
    status: "removed";
    path: string;
    checkpoint_removed: true;
    session_directory_removed: true;
    retained_entries: [];
} | {
    status: "partial";
    path: string;
    checkpoint_removed: boolean;
    session_directory_removed: false;
    retained_entries: string[];
    reason: "unowned_entries" | "session_directory_cleanup_failed";
}>;
export declare function deriveDigestCasState(current: string, before: string, after: string): "unapplied" | "applied" | "conflict";