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Contributing to Nuclide

We want to make contributing to this project as easy and transparent as possible. The Nuclide license has certain limitations around distribution. However, this does not affect your ability to fork the project and make contributions.

Code of Conduct

Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.

Our Development Process

Nuclide is currently developed in Facebook's internal repositories and then exported out to GitHub by a Facebook team member. We invite you to submit pull requests directly to GitHub and, after review, these can be merged into the project.

Getting Started

Follow this guide to start developing on Nuclide:


atom-ide-ui should be developed in its own repository - see the guide in

Pull Requests

  1. Fork the repo and create your branch from master for core changes, or gh-pages for docs and website changes.
  2. If you've added code that should be tested, add tests.
  3. If you've changed APIs, update the documentation.
  4. Ensure the test suite passes by running scripts/test, or run the affected tests individually.
  5. Make sure your JavaScript code lints by using Flow.
  6. If you haven't already, complete the Contributor License Agreement ("CLA").

Contributor License Agreement ("CLA")

In order to accept your pull request, we need you to submit a CLA. You only need to do this once to work on Nuclide and on Facebook's open source projects.

Complete your CLA here:


We use GitHub issues to track public bugs. Please ensure your description is clear and has sufficient instructions to be able to reproduce the issue.

Facebook has a bounty program for the safe disclosure of security bugs. In those cases, please go through the process outlined on that page and do not file a public issue.

Coding Style

  • Spaces for indentation rather than tabs - 2 for JavaScript, 4 for Python
  • 100 character line length
  • See the project wiki for coding practices and development tips.


By contributing to Nuclide, you agree that your contributions will be licensed under the license outlined in the LICENSE file in the same directory as this file. Due to certain limitations on distribution, this should not be considered an open source license.

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