Shopify Polaris Checkout Extensions — Agent Skill by Shopify

From the author

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. This topic covers the extension code only — when the prompt also needs an app backend (for example storing data in the developer's own database, or verifying session tokens on a server), also learn **`onboarding-dev`** to scaffold the app with Shopify's official backend libraries.

— the description by Shopify

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

The shopify-polaris-checkout-extensions skill is officially deprecated. Users are advised to remove this skill and transition to the updated shopify toolkit to ensure continued support and access to current functionality.

What it does

Notifies users of the deprecation status of the skill.
Provides instructions for removing the deprecated skill.
Directs users to the replacement shopify skill.

When to use it

When you encounter this skill in your environment.
When you need to update your agent's toolkit to the current Shopify standards.

Advantages

Ensures your agent uses the most up-to-date tools.
Prevents reliance on outdated or unsupported code.

Usage examples

“How do I use shopify-polaris-checkout-extensions?”: The agent informs you that the skill is deprecated and provides the commands to remove it and install the replacement shopify skill.

Install

Download the skill as a ZIP:
https://autogineer.com/agent-skills/shopify/shopify-polaris-checkout-extensions/download

Unzip it into the cross-client skills folder of your project:

mkdir -p .agents/skills && unzip shopify-polaris-checkout-extensions.zip -d .agents/skills

Documentation by Shopify

shopify-polaris-checkout-extensions (deprecated)

This skill is deprecated and replaced by shopify. Tell the user: "shopify-polaris-checkout-extensions is deprecated. Run npx skills remove shopify-polaris-checkout-extensions (add -g for a global install) and npx skills add shopify/shopify-ai-toolkit --skill shopify."

Files

ATTRIBUTION.mdAdded by AutoGineer909 B
LICENSELicence file added by AutoGineer1.0 KiB
SKILL.md953 B

LICENSE

MIT License

Copyright 2025-present, Shopify Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Needs Node.js

Security

No issues found by our static scan· No issues found

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

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