Full parallel migration documentation is published in the bundle repository at
https://git.wellspr.ing/WellBuilder/notshop-bundle/src/branch/main/docs/parallel-migration.md.
Key steps: deploy the bundle, configure the Shopify Storefront API read token,
map your product catalog, set up the webhook bridge, then pause Shop Campaigns.
New orders route to your sovereign stack while Shopify remains connected for legacy order management.