/**
 * Serialize file mutation operations targeting the same file across extensions.
 * Operations for different files still run in parallel.
 *
 * Note: Built-in `edit` and `write` tools in oh-my-pi do not take this queue;
 * this serializes custom tools and extensions against each other.
 */
export declare function withFileMutationQueue<T>(filePath: string, fn: () => Promise<T>): Promise<T>;