Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/dragnoir/Shopify-agent-skillsnpx agentmods add skills/dragnoir/shopify-agent-skills/app-developmentWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/dragnoir/shopify-agent-skills/app-development)<a href="https://agentmods.dev/skills/dragnoir/shopify-agent-skills/app-development"><img src="https://agentmods.dev/badge/skills/dragnoir/shopify-agent-skills/app-development/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/dragnoir/shopify-agent-skills/app-development"><img src="https://agentmods.dev/badge/skills/dragnoir/shopify-agent-skills/app-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00059 | $0.02684 |
| Opus 5.5 | $0.00024 | $0.01074 |
| Sonnet 5.5 | $0.00012 | $0.00537 |
| Haiku 4.5 | $0.00006 | $0.00268 |
Grade A, and why
app-development scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 501 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Shopify App Development
When to use this skill
Use this skill when:
- Creating a new Shopify app
- Building app extensions (admin, checkout, etc.)
- Embedding UI in the Shopify admin
- Working with OAuth and app authentication
- Managing webhooks and app events
- Using Shopify Polaris UI components
- Deploying apps to the Shopify App Store
App Types
Public Apps
- Distributed via the Shopify App Store
- Available to all merchants
- Require app review process
Custom Apps
- Built for a single merchant/organization
- Direct installation (no app store)
- Simpler distribution
Sales Channel Apps
- Integrate a sales channel with Shopify
- Appear in the Shopify admin's sales channels
Getting Started
1. Create a New App
# Initialize a new app
shopify app init
# Choose a template:
# - Remix (recommended)
# - Node
# - Ruby
# - PHP
2. Project Structure (Remix Template)
my-app/
├── app/
│ ├── routes/
│ │ ├── app._index.jsx # Main app page
│ │ ├── app.products.jsx # Products page
│ │ └── webhooks.jsx # Webhook handlers
│ ├── shopify.server.js # Shopify API config
│ └── root.jsx # Root layout
├── extensions/ # App extensions
├── prisma/ # Database schema
├── shopify.app.toml # App configuration
└── package.json
3. Start Development
# Start dev server with tunnel
shopify app dev
# View app info
shopify app info
App Configuration
shopify.app.toml
name = "My App"
client_id = "your-api-key"
[access_scopes]
scopes = "read_products, write_products, read_orders"
[webhooks]
api_version = "2025-01"
[[webhooks.subscriptions]]
topics = ["products/create", "orders/create"]
uri = "/webhooks"
[app_proxy]
url = "https://myapp.example.com/proxy"
subpath = "app-proxy"
prefix = "apps"
Environment Variables
SHOPIFY_API_KEY=your-api-key
SHOPIFY_API_SECRET=your-api-secret
SCOPES=read_products,write_products
HOST=https://your-tunnel-url.ngrok.io
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 501 lines · 59 tokens per session scan A 702c05e1b183
app-development is a skill published in the GitHub repository dragnoir/Shopify-agent-skills (50 stars, last pushed 8mo ago), licensed MIT. It adds 59 tokens to every session and 2,684 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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