In brief
To build custom functions that a merchant can install at specified points of the payment route, including product information, delivery, payment, order summary and Shop Pay. Checkout interface extensions also allow to build a new extension via the Shopify CLI.
What it does
- Add an extension to the checkout set points
- Product, Delivery, Payment, Recapitulative and Shop Pay
Who it is for, and an example
Developers who extend the Shopify checkout by an interface extension that can be installed by the merchant.
Example request: "Add an extension to the command recapitulatif and Shop Pay, and run it with the CLI. »
It is made for functions that can be installed at specified points in the checkout, including product, delivery, payment, recapitulatif and Shop Pay. Example written by iadujour.fr from the SKILL.md, not tested.
Install
In Codex: codex plugin add shopify@openai-curated (Official Place of Deposit).
codex plugin add shopify@openai-curatedWorks with
- Codex
Source: README: Codex plugin collection; the deposit marketplace is called "Official Codex". Other officers are not appointed.
Level: Intermediate
Suppose a project already in place at the publisher and the tools described in SKILL.md.
Good to know
SKILL.md excerpt
The original description, which the agent reads to decide whether to load the skill (in English):
Build custom functionality that merchants can install at defined points in the checkout flow, including product information, shipping, payment, order summary, and Shop Pay. Checkout UI Extensions also supports scaffolding new checkout extensions using Shopify CLI commands.
Quoted from SKILL.md at commit 0732ec9 . The folder also contains 4 extra files (agents/, scripts/).
The SKILL.md has 290 lines and 11 main sections:
- Required Tool Calls (do not skip)
- Validator constraints
- IMPORTANT : ALWAYS USE THE CLI TO SCAFFOLD A NEW EXTENSION
- Extension Targets (use these in shopify.extension.toml)
- APIs
- Guides
- Components available for checkout UI extensions.
- Imports
- Polaris web components (`s-banner`, `s-badge`, etc.)
- ⚠️ MANDATORY: Search Before Writing Code
- ⚠️ MANDATORY: Validate Before Returning Code
Licence: No licence found
Checked on 10 November 2026 : no licence file in the skill folder or at the repository root.
No licence found: short excerpt quoted only (quotation right). For the full text, see the source.
In the directory
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