Function writeToFile

src/utils/logger.ts:75–89

* Append a timestamped line to debug.log. * Synchronous to guarantee delivery in short-lived hook processes. * Silently fails — never throws, never recurses into log.

(level: string, msg: string)

 * Silently fails — never throws, never recurses into log.
 */
function writeToFile(level: string, msg: string): void {
  if (_writing) return; // prevent recursion
  _writing = true;
  try {
    ensureLogDir();
    maybeRotate();
    const ts = new Date().toISOString();
    const line = `${ts} [${level}] ${msg}\n`;
    fs.appendFileSync(getLogFilePath(), line, 'utf-8');
  } catch {
    // silent — file I/O must never disrupt the main flow
  } finally {
    _writing = false;
  }
}

// ─── Test helpers (not exported in production API) ──────