shopify-functions

Shopify Functions let you build custom backend logic for checkout validation by writing pure Rust functions that process GraphQL inputs. This Skill scaffolds the extension, generates the required GraphQL query, and validates your logic against Shopify's pure function compliance requirements before deployment.

Shopify Functions are pure backend functions that customize ecommerce logic for discounts, delivery, and checkout. You need them when default Shopify settings cannot handle complex, dynamic cart-based rules, such as renaming shipping options based on specific cart contents.

You generate a Shopify delivery customization extension in Rust by using the official CLI to scaffold the project. The process automates scaffolding, then guides you through generating the correct GraphQL input query and writing the Rust logic to manipulate delivery options.

Shopify Functions require writing logic in Rust to ensure compliance with Shopify's pure function requirements. This Skill specifically supports Rust development alongside schema-aware code generation to handle the diverse APIs for discounts, delivery, and checkout validation.

You validate Shopify Functions against GraphQL standards by using automated CLI integration to check schema-aware code generation. This ensures your custom backend logic complies with Shopify's pure function requirements before you deploy the ecommerce customization.

Shopify Function deployment fails pure function requirements if the backend logic maintains state or performs side effects. This Skill enforces compliance by validating your Rust code against Shopify's GraphQL input and output standards during the schema-aware code generation phase.