/**
 * Persistence helpers for the vault-level user-directory toggle
 * (`_meta/directory`). Mirrors the bypass-AES pattern used by
 * `_meta/policy` — the directory document is plain JSON, the
 * envelope's `_iv` field is left empty.
 *
 * @see https://github.com/vLannaAi/noy-db-docs/blob/main/content/docs/services/user-envelope.md → Directory visibility
 * @see https://github.com/vLannaAi/noy-db-docs/blob/main/content/docs/services/plaintext-bypass.md — every `_iv: ''` write site
 *
 * @module
 */
import type { NoydbStore } from '../../kernel/types.js';
import type { DirectoryConfig } from './types.js';
/** Reserved collection name for vault-level metadata documents. */
export declare const META_COLLECTION = "_meta";
/** Reserved id for the vault-level directory document. */
export declare const DIRECTORY_RECORD_ID = "directory";
/**
 * Read the directory toggle from `_meta/directory`. Returns `undefined`
 * when no document has been persisted — callers treat that as the
 * default-on case (`{ enabled: true }`).
 *
 * Tolerates corrupted documents the same way `_meta/policy` does: a
 * JSON parse failure surfaces as `undefined`, not a thrown error, so a
 * bad write never permanently breaks team enumeration.
 */
export declare function readDirectoryConfig(store: NoydbStore, vault: string): Promise<DirectoryConfig | undefined>;
/**
 * Persist the directory toggle at `_meta/directory`. Idempotent — call
 * on every `db.setDirectoryEnabled()` invocation. Owner-only at the
 * caller site; this primitive does not check roles.
 */
export declare function persistDirectoryConfig(store: NoydbStore, vault: string, config: DirectoryConfig): Promise<void>;