Function readFile

src/util/agent/fsOperations.ts:66–88

(filePath: string, rootDir: string)

 * without loading arbitrarily large files into memory.
 */
export async function readFile(filePath: string, rootDir: string): Promise<string> {
  const resolved = await resolveAndValidate(filePath, rootDir);
  const stat = await fs.stat(resolved);

  if (!stat.isFile()) {
    throw new Error(`Not a file: ${filePath}`);
  }

  if (stat.size <= MAX_FILE_SIZE) {
    return fs.readFile(resolved, 'utf-8');
  }

  if (stat.size <= MAX_FILE_SCAN_BYTES) {
    const content = await fs.readFile(resolved, 'utf-8');
    if (content.length <= MAX_FILE_SIZE) {
      return content;
    }
    return content.slice(0, MAX_FILE_SIZE) + `\n\n[truncated — file is ${stat.size} bytes]`;
  }

  const content = await readFilePrefix(resolved, MAX_FILE_SCAN_BYTES);
  return content.slice(0, MAX_FILE_SIZE) + `\n\n[truncated — file is ${stat.size} bytes]`;
}

/**
 * List directory entries relative to rootDir.