/**
 * Returns whether a path exists on disk. Used to decide whether an
 * auto-generated sibling file (e.g. `client.ts`, `page.ts`) already exists so
 * the validate passes never overwrite developer-authored files.
 */
export declare function fileExists(filePath: string): Promise<boolean>;
/**
 * Formats `content` with the project's prettier configuration for `filePath`.
 * Falls back to the original content when prettier is not installed or fails.
 */
export declare function formatWithPrettier(content: string, filePath: string): Promise<string>;