feature-versions-schema.js

import { schema } from '../../../lib/frontmatter.js'

// Copy the properties from the frontmatter schema.
const featureVersions = {
  properties: {
    versions: Object.assign({}, schema.properties.versions),
  },
}

// Remove the feature versions properties.
// We don't want to allow features within features! We just want pure versioning.
delete featureVersions.properties.versions.properties.feature

// Call it invalid if any properties other than version properties are found.
featureVersions.additionalProperties = false
featureVersions.properties.versions.additionalProperties = false

export default featureVersions