Code mod:

export default function transformer(file, api) {
    const j = api.jscodeshift;

    const name = file.path.split('/').pop().replace(/.js$/, '');

    return j(file.source)
      .find(j.ObjectExpression)
      .filter(path => path.parentPath.node.key && path.parentPath.node.key.name === 'docs')
      .forEach(path => {
        const prop = j.property('init', j.identifier('url'), j.literal(`https://eslint.org/docs/rules/${name}`));
        j(path).replaceWith(j.objectExpression([...path.node.properties, prop]));
      })
      .toSource({lineTerminator: '\n'});
  }

Add a lint rule to ensure that each rule has a meta.docs.url property with the correct value.