$npx -y skills add Weaverse/shopify-hydrogen-skills --skill hydrogen-upgradesStep-by-step guides for upgrading Shopify Hydrogen between versions — breaking changes, code diffs, and migration steps for each release.
| 1 | # Hydrogen Upgrades |
| 2 | |
| 3 | Version-by-version migration guides for upgrading Shopify Hydrogen. Each guide covers breaking changes, required code updates, and step-by-step diffs. |
| 4 | |
| 5 | ## Live Documentation |
| 6 | |
| 7 | For the latest upgrade information from Shopify: |
| 8 | |
| 9 | ```bash |
| 10 | node scripts/search_shopify_docs.mjs "hydrogen upgrade <version>" |
| 11 | node scripts/search_shopify_docs.mjs "hydrogen breaking changes" |
| 12 | node scripts/search_shopify_docs.mjs "hydrogen migration" |
| 13 | ``` |
| 14 | |
| 15 | The curated guides below cover specific version jumps with detailed diffs and Weaverse-specific considerations. |
| 16 | |
| 17 | ## Available Upgrade Guides |
| 18 | |
| 19 | | Guide | Key Changes | |
| 20 | |-------|-------------| |
| 21 | | [2024.4.7 → 2024.7.1](./references/upgrade-2024.4.7-to-2024.7.1.md) | Optimistic variants, new session commit pattern, Layout component refactor, VariantSelector improvements | |
| 22 | | [2024.10.1 → 2025.1.0](./references/upgrade-2024.10.1-to-2025.1.0.md) | `v3_lazyRouteDiscovery` flag, stylesheet link tag fixes | |
| 23 | | [2025.1.0 → 2025.1.1](./references/upgrade-2025.1.0-to-2025.1.1.md) | `v3_singleFetch` flag, nonce support, `json`/`defer` deprecation, B2B stabilization | |
| 24 | | [2025.1.2 → 2025.1.3](./references/upgrade-2025.1.2-to-2025.1.3.md) | `v3_routeConfig` flag, Layout export moved to separate file, `routes.ts` config | |
| 25 | | [2025.1.3 → 2025.1.4](./references/upgrade-2025.1.3-to-2025.1.4.md) | Session logout fix, `VariantSelector` deprecation, product query updates, `ProductForm` refactor | |
| 26 | | [2025.5.0 → 2025.7.0](./references/upgrade-2025.5.0-to-2025.7.0.md) | **Major** — React Router 7.9.x migration, context creation, entry point updates | |
| 27 | | [2025.7.0 → 2026.1.0](./references/upgrade-2025.7.0-to-2026.1.0.md) | **Major** — `@react-router` 7.12, `@shopify/hydrogen` 2026.1.0, Storefront API 2026-01, new cart mutations | |
| 28 | |
| 29 | ## Upgrade Process |
| 30 | |
| 31 | ### 1. Use the official upgrade tool first |
| 32 | |
| 33 | ```bash |
| 34 | npx @shopify/upgrade |
| 35 | ``` |
| 36 | |
| 37 | This CLI diffs your project against the latest Hydrogen skeleton and applies changes interactively. |
| 38 | |
| 39 | ### 2. Find the right guide above |
| 40 | |
| 41 | Match your current version to the appropriate guide. For multi-version jumps, apply each guide in order. |
| 42 | |
| 43 | ### 3. Regenerate types after upgrading |
| 44 | |
| 45 | ```bash |
| 46 | npm run codegen |
| 47 | ``` |
| 48 | |
| 49 | > Never edit `.d.ts` generated files directly — always regenerate them. |
| 50 | |
| 51 | ### 4. Resources |
| 52 | |
| 53 | - [Hydrogen changelog](https://github.com/Shopify/hydrogen/blob/main/packages/hydrogen/CHANGELOG.md) |
| 54 | - [Hydrogen skeleton](https://github.com/Shopify/hydrogen/tree/main/templates/skeleton) |