@redocly/openapi-core/src/config/__tests__/fixtures/resolve-config/plugin-esm.mjs

See https://github.com/Redocly/redocly-cli

export default async function () {
  return {
    id: 'test-plugin',
    rules: {
      oas3: {
        'oas3-rule-name': 'oas3-rule-stub',
      },
    },
  };
}