Function errorCodeOf

src/agent/recovery.ts:138–144

(content: string)

 */
/** Classify a tool error result into a coarse code for loop detection. */
export function errorCodeOf(content: string): string {
  if (typeof content !== 'string') return 'ERROR';
  const m = content.match(/^\s*\[([A-Z_]+)\]/);
  if (m) return m[1]!;
  if (/does not exist|not found|no such file/i.test(content)) return 'FILE_NOT_FOUND';
  return 'ERROR';
}

/**
 * A result can be a "soft failure": the tool itself returned success (exit 0, isError=false) but the