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<!-- when editing this file also update https://github.com/flutter/.github/blob/main/CONTRIBUTING.md -->
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Contributing to Flutter
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=======================
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_tl;dr: join [Discord](https://github.com/flutter/flutter/wiki/Chat), be [courteous](CODE_OF_CONDUCT.md), follow the steps below to set up a development environment; if you stick around and contribute, you can [join the team](https://github.com/flutter/flutter/wiki/Contributor-access) and get commit access._
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Welcome
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-------
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We invite you to join the Flutter team, which is made up of volunteers and sponsored folk alike!
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There are many ways to contribute, including writing code, filing issues on GitHub, helping people
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on our mailing lists, our chat channels, or on Stack Overflow, helping to triage, reproduce, or
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fix bugs that people have filed, adding to our documentation,
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doing outreach about Flutter, or helping out in any other way.
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We grant commit access (which includes full rights to the issue
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database, such as being able to edit labels) to people who have gained
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our trust and demonstrated a commitment to Flutter. For more details
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see the [Contributor access](https://github.com/flutter/flutter/wiki/Contributor-access)
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page on our wiki.
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We communicate primarily over GitHub and [Discord](https://github.com/flutter/flutter/wiki/Chat).
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Before you get started, we encourage you to read these documents which describe some of our community norms:
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1. [Our code of conduct](CODE_OF_CONDUCT.md), which stipulates explicitly
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that everyone must be gracious, respectful, and professional. This
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also documents our conflict resolution policy and encourages people
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to ask questions.
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2. [Values](https://github.com/flutter/flutter/wiki/Values),
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which talks about what we care most about.
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Helping out in the issue database
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---------------------------------
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Triage is the process of going through bug reports and determining if they are valid, finding out
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how to reproduce them, catching duplicate reports, and generally making our issues list
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useful for our engineers.
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If you want to help us triage, you are very welcome to do so!
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1. Join the #hackers-triage [Discord channel](https://github.com/flutter/flutter/wiki/Chat).
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2. Read [our code of conduct](CODE_OF_CONDUCT.md), which stipulates explicitly
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that everyone must be gracious, respectful, and professional. If you're helping out
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with triage, you are representing the Flutter team, and so you want to make sure to
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make a good impression!
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3. Help out as described in our wiki: https://github.com/flutter/flutter/wiki/Triage
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You won't be able to add labels at first, so instead start by trying to
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do the other steps, e.g. trying to reproduce the problem and asking for people to
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provide enough details that you can reproduce the problem, pointing out duplicates,
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and so on. Chat on the #hackers-triage channel to let us know what you're up to!
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4. Familiarize yourself with our
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[issue hygiene](https://github.com/flutter/flutter/wiki/Issue-hygiene) wiki page,
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which covers the meanings of some important GitHub labels and
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milestones.
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5. Once you've been doing this for a while, someone will invite you to the flutter-hackers
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team on GitHub and you'll be able to add labels too. See the
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[contributor access](https://github.com/flutter/flutter/wiki/Contributor-access) wiki
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page for details.
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Quality Assurance
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-----------------
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One of the most useful tasks, closely related to triage, is finding and filing bug reports. Testing
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beta releases, looking for regressions, creating test cases, adding to our test suites, and
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other work along these lines can really drive the quality of the product up. Creating tests
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that increase our test coverage, writing tests for issues others have filed, all these tasks
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are really valuable contributions to open source projects.
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If this interests you, you can jump in and submit bug reports without needing anyone's permission!
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The #quality-assurance channel on our [Discord server](https://github.com/flutter/flutter/wiki/Chat)
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is a good place to talk about what you're doing. We're especially eager for QA testing when
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we announce a beta release. See https://github.com/flutter/flutter/wiki/Quality-Assurance for
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more details.
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If you want to contribute test cases, you can also submit PRs. See the next section
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for how to set up your development environment, or ask in #hackers-test on Discord.
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> As a personal side note, this is exactly the kind of work that first got me into open
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> source. I was a Quality Assurance volunteer on the Mozilla project, writing test cases for
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> browsers, long before I wrote a line of code for any open source project. —Hixie
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Developing for Flutter
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----------------------
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If you would prefer to write code, you may wish to start with our list of [good first contributions](https://github.com/flutter/flutter/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+contribution%22).
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To develop for Flutter, you will eventually need to become familiar
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with our processes and conventions. This section lists the documents
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that describe these methodologies. The following list is ordered: you
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are strongly recommended to go through these documents in the order
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presented.
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1. [Setting up your engine development environment](https://github.com/flutter/flutter/wiki/Setting-up-the-Engine-development-environment),
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which describes the steps you need to configure your computer to
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work on Flutter's engine. If you only want to write code for the
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Flutter framework, you can skip this step. Flutter's engine mainly
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uses C++, Java, and Objective-C.
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2. [Setting up your framework development environment](https://github.com/flutter/flutter/wiki/Setting-up-the-Framework-development-environment),
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which describes the steps you need to configure your computer to
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work on Flutter's framework. Flutter's framework mainly uses Dart.
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3. [Tree hygiene](https://github.com/flutter/flutter/wiki/Tree-hygiene),
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which covers how to land a PR, how to do code review, how to
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handle breaking changes, how to handle regressions, and how to
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handle post-commit test failures.
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4. [Our style guide](https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo),
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which includes advice for designing APIs for Flutter, and how to
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format code in the framework.
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5. [Flutter design doc template](https://flutter.dev/go/template),
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which should be used when proposing a new technical design. This is a good
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practice to do before coding more intricate changes.
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[![How to contribute to Flutter](https://img.youtube.com/vi/4yBgOBAOx_A/0.jpg)](https://www.youtube.com/watch?v=4yBgOBAOx_A)
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In addition to the documents, there is a video linked above on **How to contribute to Flutter**
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from the [Flutter](https://youtube.com/c/flutterdev) YouTube channel,
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there are many pages on [our Wiki](https://github.com/flutter/flutter/wiki/),
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and an article [Contributing to Flutter: Getting Started](https://medium.com/@ayushbherwani/contributing-to-flutter-getting-started-a0db68cbcd5b)
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on Medium that may be of interest. For a curated list of pages see the sidebar
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on the wiki's home page. They are more or less listed in order of importance.
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Outreach
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--------
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If your interests lie in the direction of developer relations and developer outreach,
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whether advocating for Flutter, answering questions in fora like
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[Stack Overflow](https://stackoverflow.com/questions/tagged/flutter?sort=Newest&filters=NoAnswers,NoAcceptedAnswer&edited=true)
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or [Reddit](https://www.reddit.com/r/flutterhelp/new/?f=flair_name%3A%22OPEN%22),
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or creating content for our [documentation](https://docs.flutter.dev/)
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or sites like [YouTube](https://www.youtube.com/results?search_query=flutter&sp=EgQIAxAB),
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the best starting point is to join the #hackers-devrel [Discord channel](https://github.com/flutter/flutter/wiki/Chat).
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From there, you can describe what you're interested in doing, and go ahead and do it!
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As others become familiar with your work, they may have feedback, be interested in
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collaborating, or want to coordinate their efforts with yours.
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API documentation
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-----------------
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Another great area to contribute in is sample code and API documentation. If this is an area that interests you, join our
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[Discord](https://github.com/flutter/flutter/wiki/Chat) server and introduce yourself on the #hackers-deverl, #hackers-framework,
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or #hackers-engine channels, describing your area of interest. As our API docs are integrated into our source code, see the
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"developing for Flutter" section above for a guide on how to set up your developer environment.
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To contribute API documentation, an excellent command of the English language is particularly helpful, as is a careful attention to detail.
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We have a [whole section in our style guide](https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#documentation-dartdocs-javadocs-etc)
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that you should read before you write API documentation. It includes notes on the "Flutter Voice", such as our word and grammar conventions.
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In general, a really productive way to improve documentation is to use Flutter and stop any time you have a question: find the answer, then
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document the answer where you first looked for it.
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We also keep [a list of areas that need better API documentation](https://github.com/flutter/flutter/issues?q=is%3Aopen+is%3Aissue+label%3A%22d%3A+api+docs%22+sort%3Areactions-%2B1-desc).
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In many cases, we have written down what needs to be said in the relevant issue, we just haven't gotten around to doing it!
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We're especially eager to add sample code and diagrams to our API documentation. Diagrams are generated from Flutter code that
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draws to a canvas, and stored in a [special repository](https://github.com/flutter/assets-for-api-docs/#readme). It can be a lot of fun
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to create new diagrams for the API docs.
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Releases
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--------
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If you are interested in participating in our release process, which may involve writing release notes and blog posts, coordinating the actual
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generation of binaries, updating our release tooling, and other work of that nature, then reach out on the #hackers-releases
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channel of our [Discord](https://github.com/flutter/flutter/wiki/Chat) server.
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Social events in the contributor community
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------------------------------------------
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Finally, one area where you could have a lot of impact is in contributing to social interactions among the Flutter contributor community itself.
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This could take the form of organizing weekly video chats on our Discord, or planning tech talks from contributors, for example.
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If this is an area that is of interest to you, please join our [Discord](https://github.com/flutter/flutter/wiki/Chat) and ping Hixie on the #hackers
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channel!
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