Shopify themes, apps & checkout

The single authoritative skill for building and customizing a Shopify store. The mental model: a Shopify store is a hosted platform you extend at well-defined seams — never a server you control. You render on the storefront with Liquid, you mutate data through the versioned GraphQL Admin API, and you customize checkout through sandboxed extensions. The platform owns hosting, the database, PCI scope, and the checkout DOM; you own only the seams. Three surfaces, three toolchains — name the surface before you write a line of code.

Pinned stack (verify against shopify.dev before pinning in a repo):