Feature-based versioning allows us to define and control the versions of an arbitrarily named "feature" in one place.

Note: Do not delete data/features/placeholder.yml because it is used by tests.

Add a new YAML file with the feature name you want to use in this directory. For a feature named meow, that would be data/features/meow.yml.

Add a versions block to the YML file with the short names of the versions the feature is available in. For example:

versions:
  fpt: '*'
  ghec: '*'
  ghes: '>3.1'

The format and allowed values are the same as the frontmatter versions property.

Now you can use {% ifversion meow %} ... {% endif %} in content files!

You can also use the feature in frontmatter in content files:

versions:
  fpt: '*'
  ghec: '*'
  ghes: '>3.1'
  feature: 'meow'

You cannot use feature: to specify multiple concurrent versions, as this is not supported. Alternatively, you could create a new feature-based versioning file with the required versioning.

The schema for validating the feature versioning lives in src/data-directory/lib/data-schemas/features.ts.

TBD!