Function log

packages/cli/src/utils/autoUpdate.ts:58–65

* Quietly log a diagnostic line to `auto-update.log`. Never throws — a bad * file write must not take down the CLI.

(line: string)

 * file write must not take down the CLI.
 */
function log(line: string): void {
  try {
    mkdirSync(CONFIG_DIR, { recursive: true, mode: 0o700 });
    appendFileSync(LOG_FILE, `${new Date().toISOString()} ${line}\n`, { mode: 0o600 });
  } catch {
    /* best-effort */
  }
}

/**
 * Spawn a detached child to run the install command. Stdout/stderr land in