Magento 2.1.18 is the final 2.1.x release. After June 2019, Magento 2.1.x will no longer receive security patches, quality fixes, or documentation updates.
To maintain your site's performance, security, and PCI compliance, upgrade to the latest version of Magento.

Roadmap for developing and packaging components

To develop your component, use the following steps:

  1. Learn about using Composer with your component.
  2. Build your component
  3. Package a component

    Use our validation tool to check your package before you distribute it.

  4. Validate your component
  5. Upload the components to the Magento Marketplace.

    See the Magento Marketplace User Guide for details.