Invalid keywords


`type`	`https://docs.frem.sh/reference/api/errors/invalid-keywords`
HTTP status	`400` Bad Request

What it means

The keywords of a custom pattern are not valid: more than 10, longer than 64 characters, or containing spaces or non-printable characters.

Send up to 10 short keywords without spaces.

All fremforge API errors are RFC 9457 problem+json:

{
  "type": "https://docs.frem.sh/reference/api/errors/invalid-keywords",
  "title": "Bad Request",
  "status": 400,
  "detail": "..."
}

Branch on type, not on title or detail - those are human-readable and may be reworded.