Function normalizeLogLevel

src/utils/logger.ts:139–146

(raw: string)

 * validates against known levels. Returns null for unrecognized values.
 */
export function normalizeLogLevel(raw: string): LogLevel | null {
  const lower = raw.trim().toLowerCase();
  const mapped = lower === 'warning' ? 'warn' : lower;
  if (mapped in LOG_LEVELS) {
    return mapped as LogLevel;
  }
  return null;
}

/**
 * Yargs coerce function for log-level options.