Development policy

The development policy defines how Wikimedia software is developed. This includes MediaWiki core, the bundled skins and extensions, as well as other skins and extensions that are deployed on Wikimedia Foundation wikis.

Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.

Deprecation policy
Changes to MediaWiki core that deprecate or remove aspects of the public PHP interface, MUST follow the Deprecation policy.

Code review
Privileged Gerrit users MUST follow the Gerrit privilege policy when exercising their +2 rights.