/**
 * Folder Provider
 *
 * ExternalProvider implementation for local folder-based document sync.
 * No authentication needed — the project path (folder path) is the
 * only configuration required.
 *
 * Provides a DocumentSyncAdapter for bidirectional synchronization
 * between Stoneforge documents and markdown files on the local filesystem.
 *
 * Usage:
 * ```typescript
 * const provider = createFolderProvider();
 * const connected = await provider.testConnection({ provider: 'folder', defaultProject: '/path/to/docs' });
 * const adapter = provider.getDocumentAdapter();
 * ```
 */
import type { ExternalProvider } from '@stoneforge/core';
/**
 * Create a folder provider for local filesystem document sync.
 *
 * The provider is always ready — no authentication or configuration
 * beyond the folder path is needed.
 *
 * @returns A configured Folder ExternalProvider
 */
export declare function createFolderProvider(): ExternalProvider;
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