SHOPIFY & COMMERCE
Migrating Monolithic Shopify Stores to Next.js App Router: A 5-Phase Playbook
Step-by-step decoupling architecture mitigating SEO risk, multi-currency checkout routing, and dynamic ISR caching at the edge.
Why decouple?
Liquid themes are excellent for most merchants, but brands with complex merchandising or performance targets eventually outgrow them. A headless Next.js storefront on the Storefront API gives total control over rendering and caching.
The five phases
- Audit — inventory every URL, app and script on the current theme.
- Model — map products, collections and metaobjects to typed GraphQL queries.
- Build — implement routes with React Server Components and incremental static regeneration.
- Protect SEO — preserve URL structures, canonical tags and structured data; prepare a full 301 matrix.
- Cut over — launch behind a feature flag, monitor Core Web Vitals and Search Console daily.
