Method readFilePrefix

src/node/services/memoryService.ts:261–261

* Read at most `maxBytes` from the head of the file. Index/hot-set builds * use this so files edited outside MemoryService cannot force unbounded reads * on stream startup. May split a trailing multibyte code point; callers treat * the result as a best-effort prefix.

(relPath: string, maxBytes: number)

   * the result as a best-effort prefix.
   */
  readFilePrefix(relPath: string, maxBytes: number): Promise<string>;
  /** Atomic write; creates parent directories. */
  writeFile(relPath: string, content: string): Promise<void>;
  /** Recursive delete of a file or directory. */