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MediaWiki now has a stable interface policy for frontend code
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We now have a stable interface policy for frontend code that more clearly defines how we deprecate MediaWiki code and what wiki-based code (e.g. gadgets and user scripts).

If you work on extensions or MediaWiki core, or wiki-based code e.g. gadgets/user scripts, please read the policy page at so that you are aware of your responsibilities and please circulate it with your teams/wiki-communities.

This document is intended to be a living document that evolves with our shared needs over time, so this should not be seen as a perfect finalized document and you are welcome to pose questions and adjustments to the policy at

Thank to you the many contributors who have helped build this policy through their feedback and suggestions.