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.
| 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.
|
MediaWiki Engineering (MediaWiki Interfaces Team) | Legoktm | ||
| Authentication and Authorization | Components related to user authentication and authorization, including login and signup (AuthManager), password hashing and storage, session handling (SessionManager), and group permissions.
|
MediaWiki Engineering (MediaWiki Platform Team) | Parent5446, Gergő Tisza, Taavi Väänänen | ||
| BagOStuff | The wikimedia/bagostuff library (BagOStuff, WANObjectCache, Redis/Memcached clients) and their MediaWiki integrations.
|
MediaWiki Engineering (MediaWiki Platform Team) | |||
| Benchmarker | Faccility for benchmarking backend latency and resource usage.
|
MediaWiki Engineering (MediaWiki Platform Team) | |||
| Blocks | Classes and functions related to user blocking mostly around Special:Block and related functions. Separating this out from User Management to reflect reality.
|
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.
|
Unassigned | formerly Core Platform Team | ||
| Categories | All issues relating to categories.
|
Unassigned | Bawolff | ||
| Change tagging | The feature that allows putting tags on revisions, log entries etc. added from edit filters in Extensions (AbuseFilter, TorBlock, etc).
|
Unassigned | |||
| Configuration | The Config and ExtensionRegistry components, for registering and loading site configuration and extensions.
|
Unassigned | Legoktm, formerly Core Platform Team | ||
| ContentHandler | Representation of content values and their formatting. For the storing of content, see Revision-backend instead.
|
Unassigned | Daniel Kinzler, formerly Core Platform Team | ||
| Core testing | Configuration and base classes for checkers, unit testing, and integration testing (PHPUnit, QUnit, etc).
|
Unassigned | Timo Tijhof, Antoine Musso | Daimona Eaytoy | |
| Debug Logger | Debug logging functions, debug toolbar, and PSR-3/Monolog integration.
|
Unassigned | |||
| DjVu | All issues related to DjVu
|
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.
|
Unassigned | formerly Performance Team | ||
| Documentation | Meta issues about MediaWiki core documentation both Doxygen/JSDuck-generated and on mediawiki.org
|
Unassigned | APaskulin, Timo Tijhof | ||
| Issues relating to the email notification features and email address verification (e.g. Special:EmailUser, and Special:ConfirmEmail)
|
Unassigned | 01tonythomas | |||
| File management | Management of uploaded files (images, thumbnails, etc.)
|
Unassigned | |||
| Gallery | Gallery of media files as created by wikitext <gallery> tag.
|
Unassigned | |||
| Hooks | Hook system
|
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
|
Unassigned | Web (for any changes that might impact mobile) | ||
| HTMLForm | HTMLForm
|
Unassigned | |||
| HTML Templating | Mustache HTML templating (server-side in PHP, and client-side via mw.template)
|
Unassigned | Web (when making any significant library updates) | ||
| HTTP Cache | CDN purging and FileCache storage.
|
Unassigned | Aaron Schulz, Timo Tijhof, formerly Performance Team | ||
| Installer | Installation, setup, and upgrade procedure.
|
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.
|
Language team | Raimond Spekking, Federico Leva | ||
| Interwiki | Interwiki database and cache
|
Unassigned | |||
| JobQueue | Job queue
|
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.)
|
Content Transform Team | Liangent, Robin Pepermans, Winston Sung,
Chiefwei (Chinese language) |
||
| Logging | Special:Log, mw_logging table
|
Unassigned | Umherirrender | ||
| Maintenance system | The Maintenance script system in MediaWiki core.
|
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.
|
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.
|
Unassigned | formerly Performance Team | ||
| Page deletion | Issues related to deleting and undeleting/restoring pages and revisions (via action=delete and Special:Undelete).
|
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 | ||
| Page-Diffs | All issues relating to the page displaying differences between two revisions (diff=, oldid=, type=revision in the URL).
|
Unassigned | Web (for changes to any visual changes) | ||
| Page editing | All issues relating to the edit screen, edit conflicts, and saving edits.
|
Editing team | |||
| Page-History | All issues relating to the page displaying the history of revisions via the action=history view or Special:History page..
|
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 process that converts wiki syntax into HTML.
|
MediaWiki Engineering (Content Transform Team) | Web (if changing anything that might impact how the page is rendered) | ||
| Patrolling | New page patrolling, edit patrolling. "[mark as patrolled]". rc_patrolled etc. |
Unassigned | Marius Hoch | ||
| Profiler | Issues relating to Profiler. |
MediaWiki Engineering (MediaWiki Platform Team) | |||
| Recent changes | Bug reports and feature requests related to the special page RecentChanges.
|
Growth team (Needs New Owner) | |||
| 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).
|
Unassigned | formerly Core Platform Team | ||
| ResourceLoader | ResourceLoader delivery and management system for loading modules in MediaWiki.
|
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.
|
MediaWiki Engineering (MediaWiki Interfaces Team) | |||
| Revision deletion | Hiding and unhiding of individual page revisions, log entries and usernames and revision suppression.
|
MediaWiki Engineering (MediaWiki Interfaces Team) | Aaron Schulz | ||
| Rdbms | The wikimedia/rdbms library for interacting with relational databases, and its MediaWiki integration.
|
MediaWiki Engineering (MediaWiki Interfaces Team) | Ladsgroup (SRE Data Persistence) | ||
| Router | JavaScript module for parsing and matching in-page navigation routes (i.e. hash fragments).
|
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!
|
Search Platform | |||
| Sites | Information about other sites
|
Unassigned | |||
| Shell | Shell framework for calling external binaries.
|
Unassigned | |||
| Skin system | Issues relating to the skin system, including Skin base classes, ResourceLoader integration, and the provided skinning stylesheets.
|
Web | mediawiki‑skins group, Bartosz Dziewoński | ||
| Snapshots | Issues relating to XML snapshot generation and loading (maintenance scripts, API, interface at Special:Export/Special: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.).
|
Unassigned | |||
| Stats | Stats service for Statsd/Prometheus.
|
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")
|
Unassigned | |||
| UUID | The Wikimedia\UUID library and the GlobalIdGenerator service wiring that uses it.
|
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
|
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.
|
Unassigned | Moderator tools team | ||
| User rename | Provides a special page that allows user accounts to be renamed
|
Unassigned | Marius Hoch | ||
| Watchlist | Bug reports and feature requests related to the special page Watchlist.
|
Growth team (Needs New Owner) | Watchlist Expiry: Community Tech | Web (for changes to any performance-impacting changes) |
| 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 (to be deployed 2024) |
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 team | ||
| 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 (except Investigate. Not taking ownership but have been doing a fair bit of work on CU so know it well and can help others if needed) | |
| 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 team | ||
| 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 | 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 |
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 team | ||
| 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 team | ||
| FeaturedFeeds | Adds syndication feeds of wiki's featured content |
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 | 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 |
Unassigned | ||
| 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 |
Content Transform Team (SLA details) | ||
| Kartographer | Allows adding maps to pages |
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 | ||
| LdapAuthentication | Provides LDAP authentication, and some authorization functionality |
Unassigned | ||
| Linter | Help users find out-dated bits of wikitext to fix them |
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 | wctaiwan | |
| 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) | ||
| MobileApp | Serves styles and scripts for use in the Wikimedia native apps |
Apps (SLA details), Content Transform Team | ||
| 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 |
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 |
Content Transform Team | Jackmcbarn, Tim Starling? | |
| ParserMigration | Allows users to preview the appearance of articles with the new Parsoid parser |
Content Transform Team | ||
| PdfHandler | Handles PDF files like multipage DJVU |
Content Transform Team (SLA details) | bawolff | |
| Phonos | Text to speech parser and inline audio player |
Language team | 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.
|
|
| Quiz | Quiz building tool adopted on the Wikiversity |
Unassigned | ||
| ReadingLists | Provides an API for storing and retrieving private lists of pages. |
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 |
Unassigned | Huji | |
| ShortUrl | Adds a special page that redirects to an article based on the given base36-encoded ID |
Unassigned Under review | ||
| 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) | ||
| 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_GeSHi | 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 | ||
| 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 |
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 team | ||
| TranslationNotifications | Allows translators sign up for translation notifications |
Language team | ||
| 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 team | ||
| 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. | |
| 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 |
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 | Inuka team (SBisson) | |||
| XAnalytics | Communicates analytic information for WMF to logging infrastructure |
Unassigned |
| 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 |
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).
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 | 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 team (Santhosh Thottingal) | JS | |
| jQuery.IME | GitHub | GitHub | Language team (Santhosh Thottingal) | JS | |
| jQuery.i18n | GitHub | GitHub | Language team (Santhosh Thottingal) | JS | |
| jQuery WebFonts | GitHub | GitHub | Language team (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 |
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.
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).
| Component | 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 | |
| Application servers | The app server clusters hosting the Wikimedia Foundation wikis, including their Apache and PHP configuration (such as for portals, redirects, rewrites, etc.) | SRE (Giuseppe Lavagetto, Luca Toscano, Moritz Muehlenhoff) | ||
| 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) | ||
| 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 team | ||
| DNS | Issues relating to the nameserver configuration. | SRE > Traffic | ||
| Databases | Administration and troubleshooting of Database servers. | SRE > specially (but not only) DBAs. wikitech:MariaDB | ||
| 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 > Service Operations | Mark Holmquist, Alexandros Kosiaris, Daniel Zahn | |
| Extension setup | New extensions to get installed or enabled. Just like 'Site configuration' but more specific. | 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 installation of Git/Gerrit.
See: https://wikitech.wikimedia.org/wiki/Gerrit, https://gerrit.wikimedia.org |
Release Engineering (as of 2016-09-21) | ||
| 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 | Unassigned | formerly Core Platform 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 | ||
| Phabricator | Configuration of Wikimedia's Phabricator installation. | 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 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 Platform Team | Tim Starling | |
| Proton | Render PDF versions of Wikipedia articles. | Content Transform Team | ||
| PyBal | Automation and monitoring for LVS. | SRE Traffic (Valentin Gutierrez), and SREService Ops (Giuseppe Lavagetto) | ||
| RESTBase | Restbase: Service in front of many other services, i.e. Parsoid, Citoid, Mathoid, Graphoid | Unassigned | formerly Core Platform Team | |
| RT | https://rt.wikimedia.org - managing the procurement queue. https://wikitech.wikimedia.org/wiki/RT | SRE | ||
| 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) | |
| Traffic layer | Infrastructure for global traffic routing between data centers and the CDN, including TLS encryption and HTSTS (formerly SSL). | SRE > Traffic | ||
| 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. | 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) | ||
| 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 |
| Component | Repository | Issue tracker | Steward[1] | Maintainers[6] |
|---|---|---|---|---|
| Event Metrics | GitHub | Phabricator | Data Engineering | MusikAnimal, Samwilson, HMonroy |
| Dashiki | Gerrit | Phabricator | Data Engineering | Dan Andrreescu |
| Wikistats 2 | Gerrit | Phabricator | Data Engineering | Dan Andrreescu, Marcel Ruiz Forns |
| Refinery and Datasets | Gerrit | Phabricator | Data Engineering | |
| Hadoop Cluster | Gerrit | Phabricator | Data Engineering | |
| Airflow | Gitlab | Phabricator | Data Engineering | |
| DataHub | Gerrit | Phabricator | Data Engineering | |
| Event Platform | Gerrit
(multiple; check docs) |
Phabricator | Data Engineering | Andrew Otto |
| Component | Repository | Issue tracker | Steward[1] | Maintainers[6] | Note |
|---|---|---|---|---|---|
| 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. |
| MediaWiki interwiki map at WMF | Gerrit | Phabricator | Unassigned | This, that and the other | |
| LibraryUpgrader (LibUp) | GitLab | Phabricator | Unassigned | Unassigned | LibUp (aka libraryupgrader) is a mostly automated tool that manages upgrades of libraries and other developer dependencies for repositories hosted on Gerrit. |
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 | Responsible[2] | Consulted | Informed |
|---|---|---|---|---|
| wikipedia.org | Wikipedia Portal (Archived page) | Web (Jan Drewniak) | ||
| donate.wikimedia.org / | Fundraising specific domains | Fundraising tech | Fundraising / Advancement Leadership | |
| enterprise.wikimedia.org | Wikimedia Enterprise | Wikimedia Enterprise | ||
| incubator.wikimedia.org | ||||
| en.wikipedia.beta.wmflabs.org | Beta Cluster | Nobody[7] | ||
| patchdemo.wmflabs.org | Used for spinning up test instances with in progress Gerrit patches | Nobody | Bartosz and Ed are volunteer maintainers | |
| pixel.wmcloud.org | Visual regression testing | QTE | Web | |
| translatewiki.net | Translations (independent project) | Language team |
(Not all of them fit in current projects.)
