Good first bugs

This page is meant to be a curated list of bugs that are relatively easy for a new MediaWiki coder to fix, or tiny features you could add. These are a good way to start getting familiar with the MediaWiki code base.

Code
The code of MediaWiki, its extensions, and Wikimedia's server configuration is located in Git repositories. Patches have to be submitted to Wikimedia Gerrit for review. See Developer access and Gerrit/Tutorial for more information. In case you have problems with Gerrit you could use the Gerrit Patch Uploader.

Suggested reading
If you choose to work on a bug report that requires writing or changing code, you might want to at least skim these pages first to avoid unnecessary setbacks during the review process:
 * Developer access and Gerrit tutorial for information about how to download our code, test it and start submitting patches
 * Coding conventions and any subpages relevant to your task (PHP, JavaScript, Python, …)
 * Following the Commit message guidelines, especially the Example section at the bottom, will automatically add a notification about your patch to the corresponding report in Bugzilla. Hence there is no need anymore to add a "Please review" comment in the report.
 * Amending a change. Don't create a new Gerrit changeset to fix your previous one!
 * Getting code reviews. Find and add people as potential reviewers of your patch.

Feedback, questions and support

 * You are expected to do some basic research yourself first: Look at the code, try to get some understanding what it is supposed to do, and try to find the probable place(s) where you need to make changes in order to fix the bug.
 * If you have general questions about infrastructure, the software architecture or workflows which are not tied to the specific bug that you want to work on, use generic channels like IRC, mailing lists, or wiki discussion pages. For example, if you have a problem with Gerrit, the Gerrit discussion page could be a good place to ask.
 * If you have a specific question about the bug itself, comment in the corresponding Bugzilla report. "What do I have to do to fix this bug?" is not a good question to start with: The more specific your questions are, the more likely somebody can answer them quickly. If you have no idea at all how to fix the bug, maybe that bug is not (yet) for you - please consider finding an easier one first.
 * When asking, elaborate what you have tried and found out already, so others can help at the right level. Try to be specific - for example, copy and paste your commands and their output (if not too long) instead of paraphrasing in your own words. This avoids misunderstandings.
 * Avoid private email or support requests in our social media channels.
 * Please be patient when seeking input and comments. On IRC, don't ask to ask, just ask: most questions can be answered by other community members too if you ask on an IRC channel. If nobody answers, please ask on the bug report or wiki page related to the problem; don't just drop the question.
 * Learn more at Communication.

Communicate that you work on a bug
You do not need to be set as the assignee in a bug report or announce your plans before you start working on a bug, but it is welcome. At the latest when you are close to creating a patch for the bug, it is good to announce in a comment that you are working on it. Your announcement also helps others to not work on the bug at the same time and duplicate work.

If you stop working on a task you should remove yourself as the assignee of a bug report and reset the assignee to the default assignee, so others know that they can work on the bug report and don't expect you to still work on it.

By communicating early you will get more attention, feedback and help from community members.

MediaWiki
MediaWiki is the core software which provides basic wiki functionality. It is written in PHP. General development questions can be asked on the wikitech mailing list and the #mediawiki-dev and #mediawiki IRC channels.


 * Open easy MediaWiki bug reports and enhancement requests

Pywikibot
PyWikibot is a Python-based framework to write bots for MediaWiki. General development questions can be asked on the Pywikibot mailing list and the #pywikipediabot IRC channel.


 * Open easy Pywikibot bug reports and enhancement requests

VisualEditor and Parsoid
VisualEditor is MediaWiki's WYSIWYG editor. General VisualEditor development questions can be asked on the wikitech mailing list and the #mediawiki-visualeditor IRC channel.


 * Open easy VisualEditor bug reports and enhancement requests

VisualEditor is powered by Parsoid, a wikitext parser and runtime. General Parsoid development questions can be asked on the wikitext mailing list and the #mediawiki-parsoid IRC channel.


 * Open easy Parsoid bug reports and enhancement requests

Mobile Apps
There are numerous applications for mobile devices (Android, iOS, Windows Phone, …) to access Wikimedia wikis. General development questions can be asked on the Mobile mailing list and the #wikimedia-mobile IRC channel.


 * Open easy Mobile applications bug reports and enhancement requests

Wikidata
Wikidata is a centralized knowledge base for structured data, such as interwiki references and statistical information. General development questions can be asked on the Wikidata mailing list, the #wikidata IRC channel and on the wiki.


 * Open easy Wikidata applications bug reports and enhancement requests

Design
Fixing design bugs or requests requires existing graphics skills working with a Vector graphics application (e.g. Inkscape). Basic knowledge of CSS can also be helpful for integration. General development questions can be asked on the Design mailing list and the #wikimedia-design IRC channel.


 * Open easy design bug reports and enhancement requests

System messages
System messages in MediaWiki or its extensions often need small corrections to the English text, but the source text can only be changed in the code by developers, contrary to translations. This has grown into a large backlog of usually very easy fixes (which might be as easy as fixing a typo).

Also, many messages are unclear and require better documentation (see Localisation). Missing documentation can also be added by just editing the  subpage of the message on translatewiki.net, like all translations, but may require some study of the code to understand what a message is for: it's therefore optimal to start understanding the code, and very useful for the translators (who do not have such skills).


 * Open string change bug reports and enhancement requests

And many more…
Still not enough ideas? There are more fields you can explore - MediaWiki has hundreds of extensions and tools! Check out the complete list of bugs recommended for new contributors:
 * open bug reports and enhancement requests with the "easy" keyword
 * '''the same list but without long-commented reports (so you need to read less)

If you have any trouble or questions, please feel free to contact Quim Gil or Andre Klapper or ask for help via IRC.