Shopify Alt Text

Backfill missing image alt text across a Shopify store. Alt text is an accessibility requirement first (screen readers announce it) and an image-SEO signal second. This skill fills the gap for images that have none; it does not rewrite alt text that already exists.

The sister backfill for SEO titles and descriptions is shopify-seo-metadata: same safe-mode doctrine, different fields. The FIND stage (measuring how many images lack alt across the catalog before you commit to a sweep) belongs to shopify-catalog-audit.

One mutation, two find paths

Images live in two places on a Shopify store, but both write through the same mutation. A product image and a Files-library image are both MediaImage nodes, which are File subtypes, so a single fileUpdate sets alt on either. There is no separate product-media alt mutation to learn.