Many public GitHub projects (Psalm included) display a small badge showing how much of the project’s code is covered by PHPUnit tests, because test coverage is a useful metric when trying to get an idea of a project’s code quality.
Hopefully, if you’ve got this far, you think type coverage is also important. To that end, I’ve created a service that allows you to display your project’s type coverage anywhere you want.
Psalm, PHPUnit and many other projects now display a type coverage badge in their READMEs.
You can generate your own by adding --shepherd to your CI Psalm command. Your badge will then be available at
https://shepherd.dev/github/{username}/{repo}/coverage.svg
This service is the beginning of an ongoing effort for Psalm to support open-source PHP projects hosted on GitHub.