shopify-functions

Generate and validate Shopify Functions for discounts, delivery, and checkout APIs.

Updated Feb 17, 2026

Search Tags:#backend #graphql #rust #functions #ecommerce #shopify

Ready to run

npx skills add https://github.com/EsellersEG/meezy-integration --skill shopify-functions-esellerseg

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: shopify-functions
Source: https://github.com/EsellersEG/meezy-integration/tree/main/.agents/skills/shopify-functions
Command: npx skills add https://github.com/EsellersEG/meezy-integration --skill shopify-functions-esellerseg

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill streamlines the development of Shopify Functions by providing a structured, validated environment for creating, testing, and managing backend logic for discounts, delivery, and checkout customizations.

Core Features & Use Cases

Standardized Development: Automates the scaffolding and validation of Shopify Functions using the official CLI.
Multi-Target Support: Handles complex function requirements including fetch and run targets for various Shopify APIs.
Use Case: A developer needs to implement a custom delivery customization to rename shipping options based on cart contents. This Skill guides the developer through searching documentation, generating the correct GraphQL input query, writing the Rust logic, and validating the implementation before deployment.

Quick Start

Use the shopify-functions skill to generate a new delivery customization extension in Rust and validate the implementation.

Frequently Asked Questions about shopify-functions

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I build custom Shopify backend logic for checkout validation?▼

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.

What are Shopify Functions and when do I need them for ecommerce customization?▼

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.

How do I generate a Shopify delivery customization extension in Rust?▼

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.

Do I need to use Rust for Shopify Functions, or can I use other languages?▼

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.

How do I validate Shopify Functions against GraphQL input and output standards?▼

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.

Why does my Shopify Function fail deployment due to pure function requirements?▼

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.