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shopify-functions

Skill

Shopify Functions allow developers to customize the backend logic that powers parts of Shopify. Available APIs: Discount, Cart and Checkout Validation, Cart Transform, Pickup Point Delivery Option Generator, Delivery Customization, Fulfillment Constraints, Local Pickup Delivery Option Generator, Ord

0E-commerce

Install

git clone https://github.com/Shopify/Shopify-AI-Toolkit.git ~/.claude/skills/shopify-functions

What is shopify-functions?

Shopify Functions allow developers to customize the backend logic that powers parts of Shopify. Available APIs: Discount, Cart and Checkout Validation, Cart Transform, Pickup Point Delivery Option Generator, Delivery Customization, Fulfillment Constraints, Local Pickup Delivery Option Generator, Order Routing Location Rule, Payment Customization

What this can do

Capabilities declared in this component's own frontmatter — not inferred.

Inherit all session tools

Declares no tool restrictions — inherits every session tool

~87 tokens of context used while enabled, before you invoke anything

Documentation

README · ~18 min read

Required Tool Calls (do not skip)

You have a bash tool. Every response must use it — in this order:

  1. Call bash with scripts/search_docs.mjs "<query>" --version API_VERSION — search before writing code
  2. Write the code using the search results
  3. Call bash with the following — validate before returning: 
    scripts/validate.mjs --code '...' --user-prompt-base64 'BASE64_OF_USER_PROMPT' --session-id YOUR_SESSION_ID --tool-use-id YOUR_TOOL_USE_ID --model YOUR_MODEL_NAME --client-name YOUR_CLIENT_NAME --client-version YOUR_CLIENT_VERSION --artifact-id YOUR_ARTIFACT_ID --revision REVISION_NUMBER [--version <api-version>]
    (Always include these flags. Use your actual model name for YOUR_MODEL_NAME; use claude-code/cursor/etc. for YOUR_CLIENT_NAME. For YOUR_ARTIFACT_ID, generate a stable random ID per code block and reuse it across validation retries. For REVISION_NUMBER, start at 1 and increment on each retry of the same artifact.) Pass --version (e.g. 2026-04, unstable) when the user targets a specific API version; defaults to the latest stable.
  4. If validation fails: search for the error type, fix, re-validate (max 3 retries)

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