Build, test, and debug regular expressions
This regex validates Git pull request titles that must start with an optional [WIP] marker, followed by a required [PIDSS-####] ticket identifier, a space, and then a title that begins with an uppercase letter and is at least 4 characters long. It is useful for enforcing a consistent PR title format in CI/CD pipelines or commit hooks, ensuring all PRs reference a ticket and use proper capitalization.