Beta Features/Package

Beta Features help Wikimedia designers and engineers test out new features or significant changes to existing features.

Basic requirements

Projects added to Beta Features must meet the following requirements:

Not significantly degrade site performance;
Not noticeably degrade perceived performance of the site, or the user's system;
Not crash the user's browser;
Not cause data loss, or corruption; and
Contribute positively to the user's experience of the site, and be additive in nature. e.g. Beta Features cannot be used to remove site features or functionality without adding features meant to replace what was removed.
Pass basic interoperability with other Beta Features features (this is not to say that interoperability is a blocker. Interoperability issues need to be surfaced, and blocker-ness will be determined on a case-by-case basis).

To check that these requirements are met, be sure to test your new feature on the Beta Cluster for at least one week before deploying to production. This testing period is intended to catch any serious bugs before jeopardizing users on production.

Getting ready

What do I need to do to get my project ready for Beta Features?

We invite developers who want to test features through this project to post their submission on this queue for new Beta Features.

To that end, here are some tips on how to prepare your feature package for inclusion in Beta Features.

Feature name

Be brief, be descriptive, and if possible be fun, or at least don't talk like a robot.

Style: Use Title Case, don't use the word experiment, feature, or beta, in the name of your feature

Good = Bigger Pictures, Bad = Enlarged lightbox Image Experiment

Details: 30 characters max length, one line, no wrapping.

Feature description

Tell users what your feature does, why they would want to turn it on, and any major issues they may encounter.

Details: 255 character limit

Feature images

SVG, will be displayed at approximately 200 px wide by 100 px tall. RTL, and LTR versions if applicable.

File:BetaFeature Image template.svg is available.

Project page link

Provide a link to the MediaWiki.org project page for the feature: a simple, straightforward page written in the user's language, it may not be the same as the project page used internally for development.

Talk page link

Normally the project page's associated talk page. It can be localised for each wiki (e.g. pass Beta Features a message, so that the link can be translated and varies according to the user interface).

Browser and platform compatibility list

Provide a list of browsers or platforms with which the feature is incompatible.

Provide error string if for some reason the default error string "This Beta Feature is not yet compatible with your browser" isn't good enough.

Details: If providing alternate error text, please keep it brief and non technical.

Prerequisites

Provide the names of any other Beta Features that must be enabled for your Beta Feature to function correctly.

Post your submission

When your new Beta Feature is ready, please write a detailed description and post your submission on this New Features page. This will help WMF Engineering, Design and Product teams discuss your feature and coordinate its deployment with you.

Release requirements

See Review queue and Review queue#Preparing for deployment for a complete/general guide.

Have a quick chat with the product owner for Beta Features (currently James Forrester)
Make an extension
Get preliminary design review
Get preliminary security review
Get preliminary performance review
Make sure there is a wiki page on MediaWiki.org for it that is understandable to the general public and specific to this feature
Ensure that the discussion page for the project is using a good system (i.e. is DiscussionTools enabled by default for all users?)
Make sure there is someone on point for feedback, acting as a product manager (either volunteer or WMF staff)
Make a Phabricator project for the extension
Enable the "final version" of the code on Beta Cluster for at least a week before you want to go for production.
Make gerrit change (do not merge) to the Beta Features allow list in mediawiki configuration
Deploy!

"Graduation" requirements

Most people are happy with your feature/change
It's agreed to be a good addition to the site, balancing features, design complexity and performance
All major bugs and obviously missing features are fixed
It passes a second design, security and performance review as per review queue
You have run it as the Beta Feature in "final configuration" (with only the bits you intend to deploy, and no others) for at least two weeks before deployment.
Get agreement from the product owner for Beta Features (currently James)
Merge your code into an appropriate venue (usually MediaWiki core or an existing extension) behind a feature flag
Deploy, removing your Beta Features code from the servers and the Beta Features whitelist entry from MediaWiki configuration