MediaWiki

Developers/Maintainers

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This page lists developers who know the most about, and help maintain, core MediaWiki components, key extensions and skins, libraries and other Wikimedia technical infrastructure.

See also: Component responsibility
If you are a maintainer, please consider using/configuring Gerrit to email you for new patchsets in a repository, or the relevant control in GitLab. Alternatively you can add yourself to Git/Reviewers , which can automatically add you as a reviewer to changes on Gerrit or GitLab.


MediaWiki core

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See also: Gerrit's list of mediawiki group members (core developers with +2 on all mediawiki repositories).
Component Description Steward[1] Individual maintainer[2] Consulted[3][4] Informed[5]
API MediaWiki's web-based "action" API that lets people interact with MediaWiki programmatically.

  • This includes the following files/paths: includes/api/
MediaWiki Engineering (MediaWiki Interfaces Team) Legoktm
Authentication and Authorization Components related to user authentication and authorization, including login and signup (AuthManager), session handling (SessionManager), BotPasswords, and password storage.

  • This includes the following files/paths: includes/auth/, includes/session/, includes/password/
MediaWiki Engineering (MediaWiki Platform Team) Gergő Tisza
BagOStuff The wikimedia/bagostuff library (BagOStuff, WANObjectCache, Redis/Memcached clients) and their MediaWiki integrations.

  • This includes the following files/paths: includes/objectcache/, includes/libs/objectcache/
MediaWiki Engineering (MediaWiki Platform Team)
Benchmarker Facility for benchmarking backend latency and resource usage.

  • This includes the following files/paths: maintenance/benchmarks/
MediaWiki Engineering (MediaWiki Platform Team)
Blocks Creating and managing user blocks, including Special:Block, Special:BlockList, and their APIs, hooks, and database tables. This was separated out from "User management" in 2020.

  • This includes the following files/paths: includes/block, specials/SpecialBlock
Trust and Safety Product
Comment store Storing comments such as edit summaries, and log action reasons. Including access layers, value interfaces, and their database schema.

  • This includes the following files/paths: includes/CommentStore.php, includes/CommentStoreComment.php
Unassigned formerly Core Platform Team
Categories All issues relating to categories.

  • This includes the following files/paths: includes/Category.php, includes/collation/
Unassigned Bawolff
Change tagging The feature that allows putting tags on revisions, log entries etc. added from edit filters in Extensions (AbuseFilter, TorBlock, etc).

  • This includes the following files/paths: includes/changetags/
Unassigned
Configuration The Config and ExtensionRegistry components, for registering and loading site configuration and extensions.

  • This includes the following files/paths: includes/config, includes/registration/
Unassigned Legoktm, formerly Core Platform Team
ContentHandler Representation of content values and their formatting. For the storing of content, see Revision-backend instead.

  • This includes the following files/paths: includes/content
Unassigned Daniel Kinzler, formerly Core Platform Team
Core testing Configuration and base classes for checkers, unit testing, and integration testing (PHPUnit, QUnit, etc).

  • This includes the following files/paths: tests/
Unassigned Timo Tijhof, Antoine Musso Daimona Eaytoy
Debug Logger Debug logging functions, debug toolbar, and PSR-3/Monolog integration.

  • This includes the following files/paths: includes/debug
Unassigned
DjVu All issues related to DjVu

  • This includes the following files/paths: includes/media/DjVuImage.php, includes/media/DjVu.php
Structured Data team (details and SLA)
DeferredUpdates The DeferredUpdates mechanism allows code to be scheduled after the HTTP web response has been sent to the browser.

  • This includes the following files/paths: includes/deferred/
Unassigned formerly Performance Team
Documentation Meta issues about MediaWiki core documentation both Doxygen/JSDuck-generated and on mediawiki.org

  • This includes the following files/paths: docs/
Unassigned APaskulin, Timo Tijhof
Email Issues relating to the email notification features and email address verification (e.g. Special:EmailUser, and Special:ConfirmEmail)

  • This includes the following files/paths: includes/mail/
Unassigned 01tonythomas
File management Management of uploaded files (images, thumbnails, etc.)

  • This includes the following files/paths: includes/filerepo/, includes/libs/filebackend, includes/filebackend/
Unassigned
Gallery Gallery of media files as created by wikitext <gallery> tag.

  • This includes the following files/paths: includes/gallery
Unassigned
Hooks Hook system

  • This includes the following files/paths: includes/HookContainer, includes/Hook
MediaWiki Engineering (MediaWiki Interfaces Team) Tim Starling, formerly Core Platform Team Web (for changes to any hooks relating to skins)
HtmlFormatter A library for HTML parsing and manipulation

  • This includes the following files/paths: vendor/wikimedia/remex-html
Unassigned Web (for any changes that might impact mobile)
HTMLForm HTMLForm

  • This includes the following files/paths: includes/htmlform
Unassigned
HTML Templating Mustache HTML templating (server-side in PHP, and client-side via mw.template)

  • This includes the following files/paths: includes/TemplateParser.php
Unassigned Web (when making any significant library updates)
HTTP Cache CDN purging and FileCache storage.

  • This includes the following files/paths: includes/cache/, includes/jobqueue/jobs/HTMLCacheUpdateJob.php, maintenance/purgeList.php
Unassigned Aaron Schulz, Timo Tijhof, formerly Performance Team
Installer Installation, setup, and upgrade procedure.

  • This includes the following files/paths: includes/installer/, mw-config/
Unassigned Jon Robson (happy to provide assistance in understanding the installer or code review if needed), James Forrester, Reedy
Internationalization All issues relating to internationalization, localization, translation, and the MediaWiki namespace.

  • This includes the following files/paths: includes/languages/, includes/language/
Language and Product Localization Raimond Spekking, Federico Leva
Interwiki Interwiki database and cache

  • This includes the following files/paths: includes/interwiki
Unassigned
JobQueue Job queue

  • This includes the following files/paths: includes/jobqueue/
MediaWiki Engineering (MediaWiki Interfaces Team) Aaron Schulz
Language converter Script & regional term conversion for several languages, e.g. Chinese and Serbian. (Problem area -- not much developer capacity here.)

  • This includes the following files/paths: includes/language/LanguageConverter.php, includes/language/TrivialLanguageConverter.php
MediaWiki Engineering (Content Transform Team) Liangent, Robin Pepermans, Winston Sung,

Chiefwei (Chinese language)

Logging Special:Log, mw_logging table

  • This includes the following files/paths: includes/logging/
Unassigned Umherirrender
Maintenance system The Maintenance script system in MediaWiki core.

  • This includes the following files/paths: maintenance/
Unassigned Sam Reed
Media handlers Interface for extracting metadata and transforming media files, and the implementations thereof that ship with MediaWiki core.

The built-in media handlers include for example extracting camera metadata from JPEG, and generating thumbnails from JPEG, PNG, SVG and other files. The interface is consumed by the Parser and Imageinfo API.

The transformation methods of media handlers together make up the default image scaler and thumbnail service in core, and form the basis for PdfHandler, TimedMediaHandler, and DjVu extensions.

Note that at WMF, the thumbnail service for still images is disabled in favour of Thumbor.

  • This includes the following files/paths: includes/media
Unassigned
Merge history The MergeHistory logic and its API and Special page frontend.
MediaWiki Engineering (MediaWiki Interfaces Team)
Mime The wikimedia/mime library parses MIME types of uploaded files and maps file extensions for static resources via the MimeAnalyzer service.

  • This includes the following files/paths: includes/libs/mime
Unassigned formerly Performance Team
Output Transform Post processing ParserOutput contents

  • This includes the following files/paths: includes/OutputTransform
MediaWiki Engineering (Content Transform Team) Web (for changes to any visual changes)
Page deletion Issues related to deleting and undeleting/restoring pages and revisions (via action=delete and Special:Undelete).

  • This includes the following files/paths: includes/specials/SpecialUndelete.php
MediaWiki Engineering (MediaWiki Interfaces Team) Aaron Schulz
Page derived data Management of data derived from a page, including PageUpdater, LinksUpdate, RefreshLinks, and the database for storing this derived data (such as page_props, and link tables).
Unassigned Daniel Kinzler, formerly Core Platform Team MediaWiki Engineering (Content Transform Team)
Page-Diffs All issues relating to the page displaying differences between two revisions (diff=, oldid=, type=revision in the URL).

  • This includes the following files/paths: includes/diff/
Unassigned Web (for changes to any visual changes)
Page editing All issues relating to the edit screen, edit conflicts, and saving edits.

  • This includes the following files/paths: includes/edit, includes/editpage
Editing team
Page-History All issues relating to the page displaying the history of revisions via the action=history view or Special:History page..

  • This includes the following files/paths: includes/diff/
Unassigned Web (for changes to any visual changes)
Page protection Protection and unprotection of pages, and issues with protected pages
Unassigned formerly Core Platform Team
Parser Issues relating to the wikitext parser, which converts wikitext markup into HTML. Including ParserOutput and ParserCache.

  • This includes the following files/paths: includes/parser
MediaWiki Engineering (Content Transform Team) Web (if changing anything that might impact how the page is rendered)
Parsoid integration Issues relating to MediaWiki's integration with the next-generation Parsoid parser.

  • This includes the following files/paths: includes/parser/Parsoid
MediaWiki Engineering (Content Transform Team)
Patrolling New page patrolling, edit patrolling. "[mark as patrolled]". rc_patrolled etc.
Unassigned Marius Hoch
Profiler Issues relating to MediaWiki's built-in Profiler.

  • This includes the following files/paths: includes/profiler
MediaWiki Engineering (MediaWiki Platform Team)
Recent changes Bug reports and feature requests related to the special page RecentChanges.

  • This includes the following files/paths: includes/rcfeed
Moderator Tools
Redirects All issues relating to redirects.
Unassigned Sam Reed
Revision backend Issues related to the backend classes around revisions, blobs, and slots. Including Multi-Content-Revisions (MCR).

  • This includes the following files/paths: includes/Revision
Unassigned formerly Core Platform Team
ResourceLoader ResourceLoader delivery and management system for loading modules in MediaWiki.

  • This includes the following files/paths: includes/ResourceLoader
MediaWiki Engineering (MediaWiki Platform Team) Roan Kattouw,

Web (please consult on anything that might impact page load/defaults)

Web (for changes to any performance-impacting changes)
MW REST API MediaWiki's web-based RESTful API framework that lets people interact with MediaWiki programmatically.

  • This includes the following files/paths: includes/Rest/
MediaWiki Engineering (MediaWiki Interfaces Team)
Revision deletion Hiding and unhiding of individual page revisions, log entries and usernames and revision suppression.

  • This includes the following files/paths: includes/revisiondelete
MediaWiki Engineering (MediaWiki Interfaces Team) Aaron Schulz
Rdbms The wikimedia/rdbms library for interacting with relational databases, and its MediaWiki integration.

  • This includes the following files/paths: includes/db/, includes/libs/rdbms/
MediaWiki Engineering (MediaWiki Interfaces Team) Ladsgroup (SRE Data Persistence)
Router JavaScript module for parsing and matching in-page navigation routes (i.e. hash fragments).

  • This includes the following files/paths: resources/src/mediawiki.router
Unassigned originally: Jon Robson
Search Issues relating to the search engine. Note that Wikimedia web sites do not use the default MediaWiki search engine; please file bugs against their Search under "CirrusSearch" instead!

  • This includes the following files/paths: includes/search
Search Platform
Sites Information about other sites

  • This includes the following files/paths: includes/site
Unassigned
Shell Shell framework for calling external binaries.

  • This includes the following files/paths: includes/shell
Unassigned
Skin system Issues relating to the skin system, including Skin base classes, ResourceLoader integration, and the provided skinning stylesheets.

  • This includes the following files/paths: includes/skins/, resources/src/mediawiki.skinning, includes/resourceloader/ResourceLoaderSkinModule.php
Web mediawiki‑skins group, Bartosz Dziewoński
Snapshots Issues relating to XML snapshot generation and loading (maintenance scripts, API, interface at Special:Export/Special:Import)

  • This includes the following files/paths: includes/snapshots/, includes/export/, includes/import/
Unassigned
Special pages Issues relating to the SpecialPage framework, and the configuration and wiring relating to special pages in general. With the exception of built-in maintenance reports, issues about specific special pages should be reported under their own dedicated components instead (e.g. Page deletion, Recent changes, Search, Preferences, Watchlist, etc.).

  • This includes the following files/paths: includes/specials/, includes/specialpage
Unassigned
Stats Stats service for Statsd/Prometheus.

  • This includes the following files/paths: includes/libs/Stats/
MediaWiki Engineering (MediaWiki Platform Team) SRE/Observability (Cole White)
Templates All issues relating to templates and template inclusion.
Unassigned Jackmcbarn
Uploading File upload interface at Special:Upload. (Issues with already uploaded files should be filed under "File management")

  • This includes the following files/paths: includes/upload
Unassigned
UUID The Wikimedia\UUID library and the GlobalIdGenerator service wiring that uses it.

  • This includes the following files/paths: includes/libs/uuid/
Unassigned Aaron Schulz, Timo Tijhof, formerly Performance Team
User login and signup Account creation, login, etc. Settings bugs in this component should be moved to the "User preferences" component.
Unassigned (Growth?)

previously: Wikimedia Product Infrastructure team, Core Platform Team.

Gergő Tisza Web
User management Permissions and authorization

  • This includes the following files/paths: includes/user
Unassigned Jack Phoenix
User preferences The preferences system (sometimes known as user options or user properties), including the PreferencesFactory and UserOptionsManager services, their interface (Special/API), and database table.

  • This includes the following files/paths: includes/preferences
Unassigned Moderator Tools
User rename Provides a special page that allows user accounts to be renamed

  • This includes the following files/paths: includes/RenameUser
Unassigned Marius Hoch
Watchlist Bug reports and feature requests related to the special page Watchlist.

  • This includes the following files/paths: includes/watchlist, includes/watcheditem
Growth team (Needs New Owner) Watchlist Expiry: Community Tech Web (for changes to any performance-impacting changes)


MediaWiki extensions deployed at Wikimedia Foundation

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See also: Category:Extensions used on Wikimedia and phab:source/mediawiki-config/browse/master/wmf-config/extension-list
Extension Description Steward[1] Individual

maintainer[2]

Consultants [4]
3d Enables upload of three-dimensional model files, and supports thumbnailing and interactive viewing in Media Viewer.
Structured Data team (details and SLA)
AbuseFilter Allows privileged users to set specific controls on actions by users, such as edits, and create automated reactions for certain behaviors
(Active volunteer) Marius Hoch, Daimona Eaytoy, se4598, Matěj Suchánek
ActiveAbstract Used as part of dumpBackup
Unassigned
AdvancedSearch Enhances Special:Search by providing an advanced parameters form
WMDE Engineering (contact EMs)
AntiSpoof Prevents creation of confusable usernames
Trust and Safety Product Sam Reed
ApiFeatureUsage Access API feature usage log summaries
MediaWiki Engineering (MediaWiki Interfaces Team)
ArticleCreationWorkflow
Community Tech
ArticlePlaceholder Provides a special page with Wikidata information about a certain topic, with invitation to create an article for the topic
WMDE Engineering (contact EMs)
AutoModerator Allows moderators to configure automated prevention or reversion of bad edits based on scoring from a machine learning model
Moderator Tools Jason Sherman, Susana Cardenas Molinar
Babel Adds a parser function to inform other users about language proficiency and categorize users of the same levels and languages
Language and Product Localization
BetaFeatures Allows other extensions to register their beta features in the user preferences
Unassigned
BounceHandler Allow MediaWiki to handle bounce email efficiently with VERP headers
Unassigned 01tonythomas, Jgreen (wmf)
Calendar Creates a Calendar in pages
 Unassigned
CampaignEvents Adds tools for organizing events
Campaigns Product team
Campaigns Allows to track user account creations related to campaigns
Unassigned
Capiunto Provides basic Infobox functionality for Scribunto
 Unassigned Marius Hoch
CategoryTree Provides a dynamic view of the wiki's category structure as a tree
Unassigned
CentralAuth Allows to merge accounts into global accounts
MediaWiki Engineering (MediaWiki Platform Team) Zabe
CentralNotice Adds a central sitenotice
Fundraising tech [primarily for FR use cases]
CharInsert Create JavaScript character insert boxes
Editing team
CheckUser Allows a user with permissions to check which IPs are used by a given username and which usernames are used by a given IP
Trust and Safety Product Dreamy Jazz
CirrusSearch Implements searching for MediaWiki using Elasticsearch
Search Platform
Cite Allows footnotes for citing sources and helps for correctly citing content in offline media
Editing team Marius Hoch
CiteThisPage Adds a special page that provides different citation formats for a particular article
Unassigned Marius Hoch
Citoid Extension part of the Citoid service
Editing team
cldr Import localisation data from CLDR
Language and Product Localization
CodeEditor Provides a syntax-highlighting code editor for site & user JS, CSS and Lua pages, integrating with advanced edit toolbar
Editing team Derk-Jan Hartman
CodeMirror Provides syntax highlighting in MediaWiki's wikitext editor.
 Community Tech Pavel Astakhov
Cognate Centralises Wiktionary links into Wikidata
 WMDE Engineering (contact EMs)
Collection Allows organization of personal selections of pages in a collection that can be edited, persisted and optionally retrieved as PDF, ODF or DocBook (XML)
Unassigned Under review

task T224922

C. Scott Ananian originally: PediaPress
CommonsMetadata Extracts metadata from commons pages
Structured Data team (details and SLA)
CommunityConfiguration Allows editors with extended rights the ability to configure on-wiki functionality for all users.
Growth team
ConfirmEdit Adds CAPTCHAs for page saves and other user actions. Only QuestyCaptcha is supported.
Editing team Emufarmers, Florianschmidtwelzow
ContactPage Provides a contact form for visitors
MediaWiki Engineering (Content Transform Team) - SLA details Ammarpad
ContentTranslation Allows editors to translate an article from one language to another with the help of machine translation and other aids.
Language and Product Localization
CreditsSource Display source work credits in the page footer
Unassigned
Dashiki Renders the JSON used to configure dashiki dashboards in a friendly HTML table
 Data Engineering
Disambiguator Enables the designation of disambiguation pages with a magic word
Unassigned
DiscussionTools Tools to enhance discussion pages
Editing team
DismissableSiteNotice Allows users to close the sitenotice
Unassigned
DonationInterface Provides fundraising mechanisms for collecting payments
Fundraising tech
DynamicPageList (Wikimedia)

(aka Intersection)

Outputs a bulleted list of most recent items residing in a category, or an intersection of several categories
Unassigned Brian Wolff
DynamicSidebar Shows a dynamic sidebar based on user configuration
Unassigned Derick Alangi
EasyTimeline Produces an embedded timeline image from special syntax inside ‎<timeline> tags.
 Unassigned Antoine Musso (knows about the code)
Echo MediaWiki's notification subsystem
Growth team (Needs New Owner)
Elastica Provides base elasticsearch functionality
Search Platform
ElectronPdfService Converts wiki pages to PDFs using Electron.
 WMDE Engineering (contact EMs)
EntitySchema Stores Shape Expressions Schemas on wiki pages (for Wikidata).
 WMDE Engineering (contact EMs)
EventBus Propagates change events to a RESTful service. Transports data between arbitrary applications, in the form of events that conform to versioned schemas.
Data Platform Engineering —
EventLogging Provides logging and validation of web analytics events
Data Engineering
EventStreamConfig Exposes event stream configs in an API endpoint. Can also be used to expose configs via ResourceLoader.
 Data Engineering (Andrew Otto)
ExtensionDistributor Enables the distribution of extensions from www.mediawiki.org
Unassigned Tim Starling
ExternalGuidance Indicates to users that the wiki page being viewed is served through an external service, and provides ways to contribute back to the original wiki.
Language and Product Localization
FeaturedFeeds Adds syndication feeds of wiki's featured content
MediaWiki Engineering (Content Transform Team) - SLA details
FileExporter Provides a link to export local files to another wiki that has the FileImporter extension.
WMDE Engineering (contact EMs)
FileImporter Allows for the easy importing of a file from one wiki to another.
WMDE Engineering (contact EMs)
FlaggedRevs Allows for article content management by "editor" and "reviewer" classes
Unassigned Under Review

task T185664

Aaron Schulz, Amir Sarabadani
StructuredDiscussions (aka Flow) A modern discussion and collaboration system
Growth team (Needs New Owner)
FundraiserLandingPage Enables template parameters to be passed as querystring elements
Fundraising tech
FundraisingTranslateWorkflow Locks down translation publishing rights on selected pages
Fundraising tech (Elliott Eggleston)
FundraisingEmailUnsubscribe Donor-facing fundraising email unsubscribe form (on payments.wikimedia.org)
Fundraising tech
Gadgets Allows users to enable JS-based, user-provided gadgets from their preferences page
Unassigned Roan Kattouw, Ammarpad, Timo Tijhof, SD0001
GeoCrumbs Adds a trail of bread crumbs to the page
Unassigned
GeoData Adds geographical coordinates storage and retrieval functionality
Search Platform Team
GlobalBlocking Allows IP addresses to be blocked on multiple wikis
Trust and Safety Product
GlobalCssJs Allows global CSS and JS on a "central" wiki to be loaded for all wikis in the farm
Unassigned
GlobalPreferences Allows a user to decide which user preferences to set as global (wikifarm-wide) and which to keep local.
 Community Tech
GlobalUsage Enables viewing of global image use in a wiki farm with shared image repository
Structured Data team (details and SLA)
GlobalUserPage Enables global (shared between wikis) user pages on a wiki farm
Unassigned
GlobalWatchlist Allows a user to view changes to watched pages on multiple sites at once
(Active volunteer) DannyS712
GoogleNewsSitemap Outputs a list of pages based on what categories they are in as an RSS feed or Google news sitemap
Unassigned Brian Wolff
Graph Data-driven graphs
Editing team
GrowthExperiments Contains experiments done by the Growth team
Growth team
GuidedTour Delivers guided tours
Growth team (Needs New Owner)
ImageMap Allows clickable HTML image maps
Editing team
ImageSuggestions Image recommendation features for experienced users
Structured Data team (details and SLA)
InputBox Allows users to add predefined HTML forms to wiki pages
Unassigned
Insider Lists volunteer tour guides for travel destinations
Unassigned
Interwiki Adds a special page to view and manipulate the interwiki table
Unassigned
InterwikiSorting Allows sorting of interwiki links
WMDE Engineering (contact EMs)
IPInfo Displays IP information for anti-vandalism purposes
Trust and Safety Product
Josa Automates josa part of Korean postposition process
Unassigned
JsonConfig Provides a wiki-based JSON configuration system
MediaWiki Engineering (Content Transform Team) - SLA details
Kartographer Allows adding maps to pages
MediaWiki Engineering (Content Transform Team) Mateus Santos
LabeledSectionTransclusion Enables marked sections of text to be transcluded
Unassigned
LandingCheck Send users to localized landing pages with fallback options
Fundraising tech
Linter Help users find out-dated bits of wikitext to fix them
MediaWiki Engineering (Content Transform Team)
LiquidThreads A structured discussion system for MediaWiki
Unassigned
LoginNotify Notify users of suspicious logins
Community Tech
MapSources Gives access to several data and mapping sources
Unassigned
MassMessage Allows users to send messages across wikis
Unassigned
Math Renders mathematical formulas between <math> ... </math> tags
Editing team Derk-Jan Hartman, Moritz Schubotz
MediaModeration Checks uploaded media for possible child exploitation content. Trust and Safety Product formerly Platform Engineering Team, Core Platform Team.
MediaSearch An alternative, media-focused way to display search results through the Special:MediaSearch page.
Structured Data team (details and SLA)
MetricsPlatform Provides Metrics Platform derived stream configs to EventStreamConfig via hook.
Data Products Sam Smith, Santiago Faci, Clare Ming
MobileApp Serves styles and scripts for use in the Wikimedia native apps
Apps, MediaWiki Engineering (Content Transform Team) - SLA details
MobileFrontend Optimizes content for mobile experiences.
 Web (SLA details)
MultimediaViewer Provides a better experience to users when they click on thumbnails in a page
Structured Data team (details and SLA)
NavigationTiming Logs perceived latency measurements from client-side
Unassigned formerly Performance Team
NetworkSession A SessionProvider for api requests based on configured ip address and a secret token
Search Platform Erik Bernhardson
Newsletter Adds a preference for newsletter subscription
Unassigned Brian Wolff (for emergency issues)
NewUserMessage Adds a message to newly created user's talk pages
Growth team (Needs New Owner)
Nuke Gives sysops the ability to mass delete pages
Moderator Tools
OATHAuth An HMAC based One Time Password extension, providing two-factor authentication
MediaWiki Engineering (MediaWiki Platform Team) Taavi Väänänen
OAuth Allow users to safely authorize another application (Consumer) to use the MediaWiki api on their behalf
MediaWiki Engineering (MediaWiki Platform Team) Tgr (WMF), Ammarpad
OAuthRateLimiter Implements an OAuth hook to add rate limit values to the OAuth JSON Web Token (JWT)
 MediaWiki Engineering (MediaWiki Platform Team)
ORES Integrates data from the ORES project into the RecentChanges view
Machine Learning Team/Scoring Platform team
PageAssessments Stores assessments of pages made by WikiProjects
Community Tech
PagedTiffHandler Handles TIFF files, including multi-paged images
MediaWiki Engineering (Content Transform Team) - SLA details
PageImages Stores information about images representing a page
Web (SLA details)

Pending stewardship review

PageNotice Displays notices at the top of all pages in a namespace
 Active volunteer TTO
PageTriage Facilitates reviewing and approving new pages
Moderator Tools Novem Linguae Sohom Datta
PageViewInfo Provides fancy looking graphs of Wikimedia page view data
Unassigned
ParserFunctions Enhances parser with logical and string functions
MediaWiki Engineering (Content Transform Team) Jackmcbarn, Tim Starling?
ParserMigration Allows users to preview the appearance of articles with the new Parsoid parser
MediaWiki Engineering (Content Transform Team)
PdfHandler Handles PDF files like multipage DJVU
MediaWiki Engineering (Content Transform Team) - SLA details bawolff
Phonos Text to speech parser and inline audio player
Language and Product Localization Community Tech
Poem Adds <poem> tag for poem formatting
Unassigned
Popups Displays popups when users hover over article links (aka. Hovercards)
Web (SLA details)
ProofreadPage Helps proofreading of books.
(Active volunteer) Thomas PT (Tpt), Sohom Datta (mostly on the Javascript/interface side of things)
PropertySuggester Provides suggested properties when a user tries to add new statements to a Wikidata item.
WMDE Engineering (contact EMs)
QuickSurveys Provides in-article quick surveys or external survey to poll readers for opinions.
Web (SLA details) Consult Web for large architectural changes or UBN bugs.


Others are feel free to contribute and merge changes to this extension.

Quiz Quiz building tool adopted on the Wikiversity
Unassigned
ReadingLists Provides an API for storing and retrieving private lists of pages.
MediaWiki Engineering (Content Transform Team) - SLA details
RelatedArticles Parser function to associate related articles (cf. Wikivoyage)
Web (SLA details)
RealMe Allows verifying URLs used on user pages
(Active volunteer) Taavi Väänänen
ReportIncident Allow users to report incidents of harassment and abuse.
Trust and Safety Product
RevisionSlider Visualizes revision history
WMDE Engineering (contact EMs)
RSS Displays RSS feeds on a wiki page
Unassigned
SandboxLink Provides a link in personal tools to a per-user sandbox
Unassigned Matma Rex (Bartosz Dziewoński)
SecureLinkFixer Automatically rewrites URLs to HTTPS if domain always requires HTTPS (T200745)
Unassigned Legoktm, formerly Core Platform Team
Score Allows rendering of musical scores with en:LilyPond
Editing team Alexander Klauer, Ebe123
Scribunto Provides a framework for embedding scripting languages into MediaWiki pages
Unassigned Tim Starling, Victor Vasiliev, Jackmcbarn, cscott, formerly Core Platform Team; possibly Content Transform Team
SearchExtraNS Searches extra specified namespaces if no direct match is found
Unassigned
SearchVue Vue.js augmentations and improvements to Special:Search
Structured_Data_Across_Wikimedia
SecurePoll Extension for elections and surveys
Trust and Safety Product Huji, SD0001
ShortUrl Adds a special page that redirects to an article based on the given base36-encoded ID
Unassigned Under review

task T187045

SimilarEditors Adds a special page for discovering editors with similar edit histories
Trust and Safety Product
SiteMatrix A special page with a matrix of all Wikimedia sites
Unassigned
SpamBlacklist Provides a regex-based spam filter
Unassigned (under review)

task T224921

StopForumSpam Blocks write actions based upon stopforumspam.com deny lists
Wikimedia Security Team (SBassett (WMF), Reedy) Legoktm
SubPageList3 Provides a splist tag to list the subpages of a page
Unassigned
SubpageSortkey Changes the default sortkey to have something to do with the subpages
Unassigned Brian Wolff
SyntaxHighlight Provide a wikitext feature to embed source code examples on wiki pages with syntax highlighting. Powered by Pygments via Shellbox, and includes a VisualEditor plugin.
Editing team SD0001
TemplateData Creates and extracts data about templates and their usage
Editing team
TemplateSandbox Enables page previews using sandboxed templates
Unassigned Jackmcbarn
TemplateStyles Allows for loading sanitized CSS stylesheets from a template
MediaWiki Engineering (Content Transform Team) Gergő Tisza
TemplateWizard Adds a popup dialog box for adding template code to wikitext.
Community Tech Samwilson
TextExtracts Provides API with plain-text or limited HTML extracts of page content
Web (SLA details)

Pending stewardship review.

Thanks Lets users thank other users for individual edits
Growth team (Needs New Owner)
TheWikipediaLibrary Notifies users of their eligibility for the Wikipedia Library when they cross the edit count and account age thresholds
Moderator Tools Jason Sherman, Susana Cardenas Molinar
TimedMediaHandler Provides integrated support for server side transcoding, WebM, Ogg Theora, Vorbis, Speex and Timed Text
Unassigned Brooke Vibber (Emergency Backup: Structured Data), Michael Dale
TitleBlacklist Blocks the creation of pages matching a regular expression blacklist
Unassigned Jackmcbarn
TocTree Adds options for floated or expanded table of contents (cf. Wikivoyage)
Unassigned
TorBlock Automatically applies restrictions to Tor exit nodes with access to the wiki's front-door server
Unassigned formerly Core Platform Team.
Translate Enables in-wiki translation and proofreading
Language and Product Localization
TranslationNotifications Allows translators sign up for translation notifications
Language and Product Localization
TrustedXFF Handles trusted proxy addresses (XFF)
Unassigned formerly Core Platform Team.
TwoColConflict Provides an interactive two-column edit conflict resolution tool
WMDE Engineering (contact EMs)
UniversalLanguageSelector Allows users to select a language and configure its support in an easy way.
Language and Product Localization
UploadsLink Provides a link in personal tools to a user's uploads
Unassigned Jdlrobson
UploadWizard Helps people upload media to Commons.
Structured Data team (details and SLA), Mark Holmquist
UrlShortener Provides a basic URL shortening service
 Unassigned formerly Core Platform Team.
VipsScaler Create JPEG and PNG thumbnails at higher speed and low memory use via libvips. This replaces the default Media handlers for bitmaps, which use ImageMagick.
MediaWiki Engineering (Content Transform Team) Tim Starling, formerly Wikimedia Platform Engineering (2013)
VisualEditor Enables a rich-text editor for wiki pages (see also Parsoid)
Editing team
WebAuthn A module for OATHAuth extension that provides authentication using WebAuthn API
MediaWiki Engineering (MediaWiki Platform Team) Taavi Väänänen
WikibaseClient Client for structured data repository
WMDE Engineering (contact EMs)
WikibaseRepository Structured data repository
WMDE Engineering (contact EMs)
WikibaseCirrusSearch Implements searching for Wikibase repositories using Elasticsearch
Search Platform
WikibaseLexeme Structured lexicographical data
WMDE Engineering (contact EMs)
WikibaseLexemeCirrusSearch Implements searching for Wikibase Lexemes using Elasticsearch
Search Platform
WikibaseMediaInfo Wikibase extension to manage structured metadata of media files
Structured Data team (details and SLA)
WikibaseQualityConstraints Wikibase extension to check editor-defined constraints on entity data
WMDE Engineering (contact EMs)
Wikidata.org Specific code for Wikibase as running on Wikidata.org WMDE Engineering (contact EMs)
WikidataPageBanner Adds pagewide banners at the top of pages in specified namespaces on a wiki.
Web (SLA details)
WikiEditor Provides an extendable wikitext editing interface and many feature-providing modules
Editing team Derk-Jan Hartman
wikihiero Enables the use of hieroglyphs with additional syntaxes
Unassigned Max Semenik Jdlrobson
WikiLambda Enables a wiki to host functions written, managed, and evaluated by users
Abstract Wikipedia team
WikiLove Makes it easy to add positive feedback to user talk pages
Unassigned Jdlrobson
WikimediaApiPortalOAuth The WikimediaApiPortalOAuth extension is designed to connect the API Portal with the OAuth server on Meta-Wiki. It provides a user interface to create and manage OAuth 2.0 clients. Unassigned formerly Core Platform Team. Timo Tijhof
WikimediaBadges Default themes to display badges on Wikimedia projects
WMDE Engineering (contact EMs)
WikimediaCampaignEvents Wikimedia-specific add-ons for the CampaignEvents extension
Campaigns Product team
WikimediaEditorTasks Task generation, storage, and API service for microcontribution suggestions
MediaWiki Engineering (Content Transform Team)
WikimediaEvents Event instrumentations and wiring for Wikimedia Foundation sites
Data Products See OWNERs.md file for individual owners of each schema.
WikimediaIncubator Adds functions meant for Wikimedia Incubator
(Active volunteer) Jon Harald Søby (and currently inactive: Robin Pepermans, Hydriz, Ebe123)
WikimediaMaintenance Various WMF-specific maintenance scripts
Unassigned Sam Reed
WikimediaMessages Adds Wikimedia specific messages and grammar, as well as Wikimedia specific overrides for license related messages
Unassigned Maarten Dammers
Wikisource
Community Tech Tpt Sohom Datta
Wikistories
Language and Product Localization (SBisson)
XAnalytics Communicates analytic information for WMF to logging infrastructure
Unassigned


MediaWiki skins deployed at Wikimedia Foundation

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See also: Category:Skins used on Wikimedia and phab:source/mediawiki-config/browse/master/wmf-config/extension-list
Skin Phabricator tag Description Steward[1] Individual maintainer[2] Consultants[4]
Vector #Vector MediaWiki's default skin since 2010; outcome of the Usability Initiative. The Web team does not triage any tasks for Vector tagged with one of: #Responsive-Vector, #Reading-Web-Local-Wiki-Issues, #MediaWiki-Core-Testing. Web (SLA details)
MinervaNeue #MinervaNeue A mobile-first skin for Wikipedia. Web (SLA details)
Timeless #Timeless A fully featured skin that emphasises both content and editing tools. Unassigned Isarra Jon Robson
MonoBook #MonoBook An old skin from 2004, in grey. Web (SLA details) Bartosz Dziewoński
CologneBlue #CologneBlue An old skin from 2002, in blue. Web (SLA details) Bartosz Dziewoński
Modern #Modern An old, unsupported skin from 2008. Web (SLA details)
Nostalgia #Nostalgia An old, unsupported skin that pretends to be UseMod. Only available on https://nostalgia.wikipedia.org Web (SLA details)
WikimediaApiPortal #WikimediaApiPortal WikimediaApiPortal is a skin for MediaWiki created by the Wikimedia Foundation Core Platform Team in 2020 as part of the API Gateway initiative. The skin is designed to mimic the look and feel of conventional developer portals by incorporating header and sidebar navigation elements and following the Wikimedia Design Style Guide. The skin uses the Bootstrap CSS framework, OOUI library, and Mustache templates. The skin was created for use with the Wikimedia API Portal, so some elements of the design such as the site logo and footer are specific to Wikimedia. Unassigned formerly Core Platform Team Timo Tijhof

Libraries deployed with MediaWiki at Wikimedia Foundation

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For upstream libraries that we bundle, see Upstream projects. For other libraries that we publish see doc.wikimedia.org (includes developer dependencies, and projects not used by MediaWiki).

MediaWiki core libraries

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See also the composer.json and foreign-resources.yaml files in MediaWiki core.

Frontend and backend libraries that are published by Wikimedia and bundled with MediaWiki core.

Library Repository Issue tracker Steward[1] Individual maintainer[2] Language(s)
cssjanus/cssjanus Gerrit Phabricator MediaWiki Engineering (MediaWiki Platform Team) PHP
oojs Gerrit Phabricator MediaWiki Engineering (MediaWiki Platform Team) JS
oojs-ui Gerrit Phabricator Design System Team (Roan Kattouw, Anne Tomasevich, Eric Gardner, Volker E., Lauralyn Watson) originally: James Forrester, Bartosz Dziewoński, Volker E., Ed Sanders JS, PHP
jquery-client Gerrit Phabricator MediaWiki Engineering (MediaWiki Platform Team) JS
wikimedia/assert Gerrit TBD Unassigned PHP
wikimedia/at-ease Gerrit Phabricator Unassigned formerly Performance Team PHP
wikimedia/base-convert Gerrit Phabricator Unassigned PHP
wikimedia/cdb Gerrit Phabricator Unassigned formerly Performance Team PHP
wikimedia/codex Gerrit Phabricator Design System Team (Roan Kattouw, Anne Tomasevich, Eric Gardner, Volker E., Lauralyn Watson) JS, Vue, Less
wikimedia/common-passwords Gerrit Phabricator Unassigned originally: Sam Reed PHP
wikimeda/composer-merge-plugin GitHub GitHub Unassigned originally: Bryan Davis PHP
wikimedia/CLDRPluralRuleParser Gerrit Phabricator Language and Product Localization (Niklas Laxström) PHP
wikimedia/html-formatter Gerrit Phabricator Unassigned PHP
wikimedia/ip-utils Gerrit Phabricator Unassigned Brandon Black PHP
wikimedia/less.php Gerrit Phabricator MediaWiki Engineering (MediaWiki Platform Team) PHP
wikimedia/minify Gerrit Phabricator MediaWiki Engineering (MediaWiki Platform Team) PHP
wikimedia/normalized-exception Gerrit Phabricator Unassigned Gergő Tisza PHP
wikimedia/object-factory Gerrit Phabricator Unassigned originally: Bryan Davis PHP
wikimedia/parsoid Gerrit Phabricator Content Transform Team (Subbu Sastry, C. Scott Ananian) PHP
wikimedia/php-session-serializer Gerrit Phabricator MediaWiki Engineering (MediaWiki Platform Team) PHP
wikimedia/purtle Gerrit Phabricator WMDE Stas Malyshev PHP
wikimedia/relpath Gerrit Phabricator MediaWiki Engineering (MediaWiki Platform Team) PHP
wikimedia/remex-html Gerrit Phabricator Unassigned originally: Core Platform Team PHP
wikimedia/request-timeout Gerrit Phabricator Unassigned formerly Performance Team PHP
wikimedia/running-stat Gerrit Phabricator Unassigned formerly Performance Team PHP
wikimedia/scoped-callback Gerrit Phabricator Unassigned formerly Performance Team PHP
wikimedia/services Gerrit Phabricator Unassigned Legoktm, formerly Core Platform Team PHP
wikimedia/shellbox Gerrit Phabricator Unassigned Tim Starling, Legoktm PHP
wikimedia/utfnormal Gerrit Phabricator Unassigned originally: Brooke Vibber PHP
wikimedia/timestamp Gerrit Phabricator Unassigned formerly Performance Team PHP
wikimedia/wait-condition-loop Gerrit Phabricator Unassigned formerly Performance Team PHP
wikimedia/wrappedstring Gerrit Phabricator MediaWiki Engineering (MediaWiki Platform Team) PHP
wikimedia/xmp-reader Gerrit Phabricator Unassigned PHP

MediaWiki extension libraries deployed at Wikimedia

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Library Repository Issue tracker Steward Individual maintainer Language(s)
VisualEditor Gerrit Phabricator Editing team (Ed Sanders) JS
UnicodeJS Gerrit Phabricator Editing team (David Chan, Ed Sanders) JS
jquery.uls GitHub GitHub Language and Product Localization (Santhosh Thottingal) JS
jQuery.IME GitHub GitHub Language and Product Localization (Santhosh Thottingal) JS
jQuery.i18n GitHub GitHub Language and Product Localization (Santhosh Thottingal) JS
jQuery WebFonts GitHub GitHub Language and Product Localization (Santhosh Thottingal) JS
wikimedia/css-sanitizer Gerrit Phabricator Unassigned originally: Gergő Tisza PHP
wikimedia/equivset Gerrit Phabricator Unassigned originally: Brooke Vibber PHP
wikimedia/lucene-explain-parser Gerrit Phabricator Search Platform PHP
wikimedia/textcat Gerrit Phabricator Search Platform (Trey Jones) PHP
wikimedia/zest-css Gerrit Phabricator Content Transform Team (C. Scott Ananian) PHP
wikimedia/metrics-platform GitLab Phabricator Data Products JS, PHP

Upstream projects and libraries

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Main page: Upstream projects

There are many upstream projects on which MediaWiki, extensions, and/or Wikimedia depend. Some of them were "invented here", as stand-along libraries, or split out as part of the Library infrastructure for MediaWiki project. Some of them are widely-used third party tools to which community members provide improvements or support. Others are merely used with gratitude.

Services and administration

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See also: wikitech:Category:Services and m:FLOSS-Exchange

  Note: If you need immediate help with a systems administration question, please go into the IRC channel #wikimedia-operations connect and find the person currently on Ops Clinic duty" (as listed in the /topic).

Service Description Steward[1] Individual maintainer[2] Consultants[4]
API Gateway The API Gateway is a service that runs in Kubernetes based on Envoy. The service implements many features central to serving the unified API and the API portal. Unassigned formerly Core Platform Team
Add A Link The Link Recommendation Service recommends phrases of text in an article to link to other articles on a wiki. Users can then accept or reject these recommendations. The services consists of the research/mwaddlink python application and the linkrecommendation service deployed in Kubernetes Add a Link teams
AS Report Generation of public asoranking monthly dataset and accompanying webpage. Unassigned formerly Performance Team, Timo Tijhof
Arc Lamp Collect sample profiles from production traffic using Excimer and aggregate into flame graphs. SRE Observability formerly Performance Team
navtiming Webperf processor service between Navigation Timing extension and Grafana. Unassigned formerly Performance Team, SRE Observability
Backup & data recovery management Backups and recoveries are normally self-served & automated (setting up new backups, generating them, recovering from, but Data Persistence "owns" the setup and maintenance of the infrastructure, and can support people needing help for the centralized setup (using Bacula, MinIO and Python), specially for new, large projects with special needs. SRE > Data Persistence (Jaime Crespo)
CDN (HAProxy, Varnish, ATS) Infrastructure for CDN caching and global traffic routing between data centers. See also SLO/HAProxy, SLO/Varnish, and SLO/Trafficserver. SRE > Traffic
ChangeProp Change propagation Unassigned formerly Core Platform Team
Citoid Citoid Unassigned formerly Core Platform Team
Cloud Services Wikimedia Cloud Services computing infrastructure, the Toolforge hosting environment, and many additional supporting technologies used in the Cloud Services environment. https://wikitech.wikimedia.org/wiki/Help:Cloud_Services_introduction Wikimedia Cloud Services team
Continuous integration The WMF CI infrastructure, including Jenkins, Zuul and the https://integration.wikimedia.org/ portal. Release Engineering (as of 2016-09-21) integration group
cxserver cxserver Language and Product Localization
DNS Issues relating to the nameserver configuration. SRE > Traffic
Databases (MariaDB) Administration and troubleshooting of Database servers. SRE > specially (but not only) DBAs. wikitech:MariaDB
Elasticsearch Search engine as used by MediaWiki in production, via the CirrusSearch extension. See also SLO/Search. Search Platform
Etherpad Anything related to Wikimedia's installation of Etherpad or Etherpad Lite. https://wikitech.wikimedia.org/wiki/etherpad.wikimedia.org https://etherpad.wikimedia.org SRE > Collaboration Services Mark Holmquist, Alexandros Kosiaris, Daniel Zahn
Etcd (Main cluster) State management for WMF tier 1 production services, including for Varnish and MediaWiki. See also SLO/etcd main cluster. SRE > Service Operations
Extension setup New extensions to get installed or enabled. Just like 'Site configuration' but more specific.

See: Category:Extensions used on Wikimedia

Release Engineering (as of 2016-09-21) Sam Reed
Fresh Fast and ready-to-use Docker container with developer tools for Node.js and headless browsers. Release Engineering Timo Tijhof
Fundraising Misc. A catch-all for miscellaneous fundraising-related components not covered by MediaWiki extensions and civicrm. See: https://wikitech.wikimedia.org/wiki/Fundraising FR Tech
Graphite https://graphite.wikimedia.org/ - a real-time performance graphing system SRE
Gerrit Issues with Wikimedia's Gerrit installation for code review and Git repository historing, at gerrit.wikimedia.org Release Engineering (as of 2016-09-21)
GitLab Release Engineering, SRE > Collaboration Services
IDM The account creation and login portal for Wikimedia Developer accounts (sometimes known as "LDAP" or "Gerrit" accounts) located at idm.wikimedia.org (codenamed "Bitu"). SRE > Infrastructure Foundations
Image-suggestion service HTTP API exposing data from the Image Suggestions pipeline to the ImageSuggestions MediaWiki extension. Structured Data team formerly Core Platform Team
irc.wikimedia.org Issues with Recent Changes feeds on irc.wikimedia.org.

For help with Libera Chat IRC (e.g. cloaks or channels), refer to #wikimedia-ops instead or check meta:IRC/Cloaks.

Data Engineering
IRC Bots Issues with bot tools on Libera IRC that are not in "WM-Bot" or "Wikibugs". Cloak/channel requests etc should go to #wikimedia-ops or to meta. See meta:IRC/Cloaks. (Active volunteer) Petr Bena
ircservserv Manages IRC channel configuration through declarative files in Git. (Active volunteer) Legoktm, Taavi
Kask Kask is an opaque key-value data store with a RESTful (HTTP) interface. Unassigned formerly Core Platform Team
Mailing lists Issues relating to the mailing lists/Mailman.

See: m:Mailing lists/Administration, https://lists.wikimedia.org, https://wikitech.wikimedia.org/wiki/Mailman

SRE Ladsgroup, Legoktm
Mathoid Mathoid is being phased out as part of RESTBase sunsetting (T338429) Unassigned Moritz Schubotz, formerly Wikimedia Services team
Media storage Storage infrastructure for images, videos and other media files from Wikimedia Commons and other wikis. Currently based on Swift. SRE (Filippo Giunchedi, Matthew Vernon)
Icinga [1] SRE
ipoid The ipoid service provides an API for retrieving reputation data for individual IP addresses, as well as retrieving lists of IP addresses matching a particular set of labels (e.g. list of IP addresses that are associated with VPNs). Trust and Safety Product
NOC contains public copies of our configuration files. https://noc.wikimedia.org and https://wikitech.wikimedia.org/wiki/noc.wikimedia.org Unassigned
ORES ORES / ores.wikimedia.org Scoring platform team
performance.wikimedia.org The performance.wikimedia.org portal, including the Excimer UI (excimer-ui-client, excimer-ui-server), and XHGui web apps (Phabricator). SRE Observability formerly Performance Team
Phabricator Configuration of Wikimedia's Phabricator installation.

See: https://wikitech.wikimedia.org/wiki/Phabricator

Release Engineering Andre Klapper, and administrators
Phatality OpenSearch Dashboards plugin to easily associate errors with Phabricator Tasks. Ahmon Dancy, Brennen Bearnes, Cole White, Jaime Nuche
php-excimer Low-overhead sampling profiler and interrupt timer. MediaWiki Engineering (MediaWiki Platform Team) Tim Starling
php-luasandbox Safely execute untrusted Lua 5.1 code. Unassigned Tim Starling
php-wikidiff2 Fast diff engine. WMDE Engineering (contact EMs) Tim Starling
php-wmerrors Extended error handling and display. Unassigned Tim Starling, formerly Performance Team
poolcounter Low-latency mutex deamon to protect against load spikes (Gerrit, Phabricator). MediaWiki Engineering (MediaWiki Platform Team) Tim Starling
Proton Render PDF versions of Wikipedia articles. MediaWiki Engineering (Content Transform Team)
PyBal Automation and monitoring for LVS. SRE Traffic (Valentin Gutierrez), and SREService Ops (Giuseppe Lavagetto)
RESTBase Wikimedia REST API (aka RESTBase) is an API router in front of certain Node.js services, i.e. Citoid, Mathoid (formerly: Parsoid, Graphoid). Unassigned formerly Core Platform Team
RT https://rt.wikimedia.org - managing the procurement queue. https://wikitech.wikimedia.org/wiki/RT SRE
Statsv Intake service for stats from MediaWiki JavaScript, forwarding it to Statsd/Graphite. SRE Observability formerly Performance Team
Shellbox Secure and isolated execution of external libraries, such as Lilypond (for MediaWiki Score extension), and Pygments (for MediaWiki SyntaxHighlight extension).

The service runs in Kubernetes and uses the Shellbox PHP library, which is lacking an owner (listed above under Libraries)

SRE ServiceOps
Snapshots Snapshots of MediaWiki content provided in datasets for external re-use.

https://dumps.wikimedia.org https://wikitech.wikimedia.org/wiki/Dumps WMF Projects/Data Dumps

Unassigned Hydriz, formerly Core Platform Team, WMCS, WMDE Engineering (contact EMs)
Technical Blog The Wikimedia Tech Blog, a WordPress installation (hosted by Automattic.com). Source code Wikimedia Developer Advocacy Team
Thumbor Thumbnail service for Wikimedia wikis, especially rendering of SVG files (which represents the majority of thumbnail-related configuration requests and upgrades). Unassigned TheDJ?
Vagrant (mediawiki-vagrant) Virtual environment for bootstrapping MediaWiki development Release Engineering (as of 2016-09-21)
VRT System The platform used for the Volunteer Response Team, historicaly based on the OTRS software.

https://ticket.wikimedia.org

SRE > Service Operations User:Madman, Peter Gervai
wikibugs IRC bot Announces changes to Phabricator tasks on IRC - https://wikitech.wikimedia.org/wiki/wikibugs Legoktm, Valhallasw
Wikimedia Portals Wikimedia Portals Web JDrewniak
XHGui Graphical interface for PHP profiling data captured by WikimediaDebug. SRE Observability. formerly Performance Team
Sanitarium The redaction process ("redactatron") that hosts and prepares production databases such that they can safely replica public information to Wikimedia Cloud Services. SRE Data Persistence (Jaime Crespo is most familar, but not maintainer)
varnishkafka Aggregate and transport in-memory logs from all Varnish frontend CDN nodes into Kafka for offline processing. SRE > Traffic (Valentin Gutierrez)
WikiKube The "WikiKube" Kubernetes cluster, and the MediaWiki-on-Kubernetes helm charts, power all Wikimedia Foundation wikis. This includes configuration of Apache and PHP (such as for portals, rewrites rules). Phabricator: Wikimedia-Apache-conf, MW-on-K8s. SRE > Service Operations
Wikidata Query Service See also SLO/WDQS. Search Platform
WikimediaDebug Debug and profile MediaWiki web requests in production. Release Engineering
wikimediafoundation.org https://techblog.wikimedia.org/, a WordPress install hosted by Automattic.com, https://blog.wikimedia.org. Source code WMF Communications Team
Wikitech wiki Provides documentation related to the technical projects and infrastructure maintained by the Wikimedia Foundation - https://wikitech.wikimedia.org, https://wikitech.wikimedia.org/wiki/wikitech Wikimedia Cloud Services team
Zotero translation-server Service that is in support of the citoid service. Editing team

Data Platform

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See also: wikitech:Data Platform


Service Repository Issue tracker Steward[1] Maintainers[6]
Event Metrics GitHub Phabricator Data Platform Engineering MusikAnimal, Samwilson, HMonroy
Dashiki Gerrit Phabricator Data Platform Engineering Dan Andrreescu
Wikistats 2 Gerrit Phabricator Data Platform Engineering Dan Andrreescu, Marcel Ruiz Forns
Refinery and Datasets Gerrit Phabricator Data Platform Engineering
Hadoop Cluster Gerrit Phabricator Data Platform Engineering
Airflow Gitlab Phabricator Data Platform Engineering
DataHub Gerrit Phabricator Data Platform Engineering
Event Platform Gerrit

(multiple; check docs)

Phabricator Data Platform Engineering Andrew Otto
Turnilo Data Platform Engineering

Misc

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These include a selection of Toolforge tools and Cloud VPS projects that are maintained by Wikimedia Foundation and/or heavily used as part of the development process.

Component Repository Issue tracker Steward[1] Maintainers[6] Note
Beta Cluster Unassigned Nobody[7] beta.wmflabs.org
Codesearch Gerrit Phabricator Unassigned
Wikipedia Android app GitHub Phabricator WMF Mobile Apps team
Wikipedia for iOS GitHub Phabricator WMF Mobile Apps team
MediaWiki config at WMF Gerrit Phabricator Release Engineering (as of 2016-09-21) Sam Reed MediaWiki configuration of Wikimedia Foundation sites.
LibUp GitLab Phabricator Unassigned Taavi Väänänen LibUp (aka libraryupgrader) is a semi-automatic service that upgrades libraries and other developer dependencies for all our software repositories hosted on Gerrit.
patchdemo.wmflabs.org Unassigned Bartosz and Ed are volunteer maintainers Used for spinning up test instances with in progress Gerrit patches

Report bugs here

pixel.wmcloud.org QTE Web Visual regression testing
MediaWiki interwiki map at WMF Gerrit Phabricator Unassigned This, that and the other

Sites

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This table lists tools and sites which benefit from clarity around ownership as they behave differently to other sites, or have their own deploy processes outside the standard train.

Component Description Steward[1] Maintainers[6]
www.wikipedia.org Wikipedia Portal (outdated) Web Jan Drewniak
donate.wikimedia.org / thankyou.wikipedia.org Production wikis, notable for being used exclusively for Fundraising purposes. Fundraising tech, WMF Advancement
payments.wikimedia.org External wiki dealing with sensitive deta, hosted separately, in the "payments" cluster. See also wikitech:payments.wikimedia.org. Fundraising tech, WMF Advancement
enterprise.wikimedia.org Wikimedia Enterprise Wikimedia Enterprise
translatewiki.net Translations (independent project) Language and Product Localization

Other areas of focus

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(Not all of them fit in current projects.)

See also

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References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Stewards are teams with professional responsibility over the development and overall health of the component. They commit to a base level of support such as high priority bug fixes and code reviews. A stewarding team must have one or more developers that can act as Maintainer, which means they can write changes but also have +2 access to the relevant Git repository to merge changes. In most cases, a steward is also the primary (and only) maintainer. For more information regarding stewardship, see Development policy/Code Stewardship.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Individual maintainers are developers that act as primary maintainer in lieu of a steward. This is usually the case for components that have no assigned steward (e.g. components that are volunteer-led), or where the steward has agreed to be a fallback.
  3. ↑ Consulted Teams/people in this column can be consulted about changes as have useful expertise or experience. Typically +1, -1 or comment.
  4. ↑ 4.0 4.1 4.2 4.3 Consultants are developers/teams that have signalled an intent to answer questions or assist with problems, but should not be confused with maintainers. These may be former maintainers, or contributors in training.
  5. ↑ Informed When making significant changes in this area of code - teams/individuals here should be notified about changes (ideally via phabricator comment).
  6. ↑ 6.0 6.1 6.2 have +2 access to the relevant Git repository and they regularly respond to bug reports and changeset review requests. Only maintainers can merge changes in Gerrit. Anyone may participate in Phabricator and in Gerrit to help investigate bugs or review code and gaining experience that way. If you're seeking to become an active maintainer, feel free to contact a steward or maintainer and share this desire by asking if they're willing and able to mentor and involve you proactively for a certain period of time.
  7. ↑ T215217: deployment-prep (beta cluster): Code stewardship request
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