`invalid-regex-format`

Rejects a schema pattern that Specmatic cannot compile as a regular expression.

Intent

An invalid regex cannot reliably validate data and may fail later in tooling or runtime code.

Any schema pattern that is not valid according to Specmatic's regular-expression engine.

Valid patterns or schemas without pattern.

postalCode:
  type: string
  pattern: '[0-9{5}'

Diagnostic: Invalid Regex format

Close and quantify the character class correctly:

postalCode:
  type: string
  pattern: '^[0-9]{5}$'

profiles:
  default:
    rules:
      extends: [recommended]
      override:
        invalid-regex-format: warn

Nearby: pattern-length-incompatible.