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Hydrogen 2026-10 is now available

The new Hydrogen is now GA: A framework-agnostic JavaScript library to add Shopify commerce to your existing stack, plus skills for coding agents and starters for React Router and Next.js.
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Changelog
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Surfaces & APIs

Versions

Change type

  1. October 2026

    Surface
    1. New owner_type field for metafield declarations in Checkout and Customer Account UI extensions, required in 2027-01
      Action requiredCheckout UI

  2. September 2026

    Surface
    1. Request a bundle size exception for existing UI extensions
      Admin Extensions
    2. Customer Address APIs now support countryCode
      DeprecatedCheckout UI

  3. July 2026

    Surface
    1. Draft order deposit fields are now available in the GraphQL Admin API and Customer Account API
      Admin GraphQL API

  4. May 2026

    Surface
    1. Polaris web components migration guides now available for Checkout and Customer Account UI extensions
      Checkout UI
    2. Ship and pickup in one order now available in feature preview
      Action requiredAdmin Extensions

  5. April 2026

    Surface
    1. Deprecation of checkout metafields in checkout and customer account UI extensions
      Action requiredCheckout UI
    2. Automated testing for Shopify UI extensions with @shopify/ui-extensions-tester
      Admin Extensions
    3. Removing outdated Polaris reference docs
      Admin Extensions

  6. January 2026

    Surface
    1. Let buyers update subscription payment methods without leaving your extension
      Customer Accounts

  7. August 2025

    Surface
    1. Build an Announcement Bar Extension for the Thank You page or Customer Account Pages
      Checkout UI
    2. New: Support for nested cart lines
      Functions

  8. July 2025

    Surface
    1. Analytics API now available for Customer Account UI extensions
      Customer Accounts

  9. May 2025

    Surface
    1. CustomerPrivacy API & footer extension target now available for Customer Account extensions
      Customer Accounts

  10. March 2025

    Surface
    1. Support added for app-owned metafields
      Customer Accounts