/**
 * useFileSystem Hook - React hook for file operations
 *
 * Wraps FileSystem to provide sandboxed file storage operations
 * with React state management.
 *
 * Requirements: 1.1
 */
export interface UseFileSystemReturn {
    /** Write content to a file */
    writeFile: (fileName: string, content: string) => Promise<boolean>;
    /** Append content to a file */
    appendFile: (fileName: string, content: string) => Promise<boolean>;
    /** Read file content */
    readFile: (fileName: string) => Promise<{
        content: string;
        lineCount: number;
    }>;
    /** List all files in workspace */
    listFiles: () => Promise<string[]>;
    /** Archive old files with timestamp */
    archiveOldFiles: () => Promise<void>;
    /** Get workspace directory path */
    getWorkspaceDir: () => string;
    /** Whether file system is initialized */
    isInitialized: boolean;
    /** Error from last operation (null if no error) */
    error: string | null;
    /** Files currently in workspace */
    files: string[];
}
/**
 * React hook for file system operations
 *
 * @param workspaceDir - Optional custom workspace directory path
 * @returns Object with file operation functions and state
 *
 * @example
 * ```tsx
 * const { writeFile, readFile, listFiles, files } = useFileSystem()
 *
 * // Write a file
 * await writeFile('notes.md', '# My Notes\n\nHello world')
 *
 * // Read a file
 * const { content, lineCount } = await readFile('notes.md')
 * console.log(`File has ${lineCount} lines`)
 *
 * // List all files
 * const allFiles = await listFiles()
 * console.log('Files:', allFiles)
 * ```
 */
export declare function useFileSystem(workspaceDir?: string): UseFileSystemReturn;
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