An important part of writing an addon is showing others how to use it. There are some well-established patterns and tools that help addon authors save some time and get their work discovered.
Naming your addon
There is no enforced rule for it, but most addons use ember as the first part of the addon's name.
This makes the addon easier to search for in the npm repository.
The README
Every addon should have a README.md file describing why someone might want to use the addon and how to install it.
If your addon has a documentation site or demo apps, be sure to include links to them.
The CONTRIBUTING
Every new addon contains a CONTRIBUTING.md when generated with Ember CLI. This file should describe how to run the addon locally, how to run tests, and contributing guidelines.
Creating a documentation site
ember-cli-addon-docs help you create interactive, versioned documentation for your addon!
This tool is used by both Ember projects and the community as a whole. For example, check out the ember-styleguide, which is a library of UI components that make up emberjs.com. The addon docs help show what components are available and how to use them.
Another option is to create your own site from scratch. Many addon authors use the dummy app within an addon to build their documentation site, and deploy it to GitHub pages. The Ember addon ember-cli-github-pages simplifies deploying the dummy app to GitHub pages.
For more inspiration, take a look at how your favorite addons do their documentation.
Getting an addon included in Ember Observer
Ember Observer is an independent, community-made resource that rates and lists addons.
When you create an addon using the Ember CLI, it includes tags in the package.json that help it get picked up for inclusion in Ember Observer. There are objective and subjective evaluations that factor into an addon's overall score and ranking. Read more about the scoring here.
Following SemVer
Following SemVer, or Semantic Versioning, is highly encouraged for addon authors. It is the main way to inform an addon's users of breaking changes, new features, and patches.
When there are major versions with breaking changes, it is important to include notes about how users can migrate to new versions.
Depending on the extent of the breaking changes, the migration steps often have a summary in the README and a link to more detailed information in the release notes.