# X_NEW_ERROR_CODE_PATTERN_UNKNOWN

## Means

the package's `errors.ts` has no shape `new-error-code` can add to

## Typical cause

no `…TITLES` object, no literal `registerErrorCodes({ … })` and no frozen `…ERROR_CODES` declarations, so adding the code would mean guessing. Both edits are planned before either is written, so the refusal leaves both files as they were

## Fix

register the code by hand in the package's `errors.ts`, and add its row to `wiki/Error-Codes.md` in the same change

[CLI and verify](/error-codes#cli-and-verify)