What does a "recipe" actually contain?

Each recipe is four blocks: (1) Goal — one sentence, e.g. "Add a vendor_sku attribute to the product entity"; (2) Prompt — the literal text you paste into Claude Code; (3) Files touched — the expected diff surface (e.g. etc/db_schema.xml, Setup/Patch/Data/<Patch>.php, etc/extension_attributes.xml); (4) Verify — the exact CLI command(s) that prove it shipped (bin/magento setup:upgrade, then a SQL query or a REST call). If you can't write the verify step, the recipe isn't ready — you don't actually know what success looks like.