[PHPCodeSniffer](https://www.mediawiki.org/wiki/Continuous_integration/PHP_CodeSniffer) helps us stick to same coding standards across MediaWiki and its extensions.
In MediaWiki core and various MW extensions, we have PHP CS rules in a file called `.phpcs.xml` that are excluded because the repocode repository has various violations. In most cases, these can't be fixed automatically.
Remove the exclusiona sniff from the `.phpcs.xml` file, run `composer phpcs` or `phpcs -p -s`, get a list of violations, provide patches in [Wikimedia Gerrit](https://www.mediawiki.org/wiki/Gerrit/Tutorial) to fix the violations. **If** you fix all violations for one sniff, and you will get a list of violationsalso commit the removal of the exclusion from `.phpcs.xml` too.
Fix some (define a number here?) of these up, and commit them. If you fix them all, commit the removal of the exclusion from phpcs.xml too.