L1
SKU.md · stable knowledge
Catalog discovery and source-backed product facts published by the merchant.
SKU.md 1.0.0-beta
Give shopping agents a clear path to your official catalog.
Publish one small Markdown file at /sku.md. Add source-backed product knowledge only when it helps. Live price, inventory, shipping, and checkout stay with live commerce systems.
From store URL to a checked /sku.md in five minutes
The first useful release is the root file. Product knowledge is a separate, optional next step.
- 01
Generate
Enter a public storefront. Review the detected merchant name, summary, website, and one public catalog link.
- 02
Publish
Copy or download the Markdown, then place the exact file at the root /sku.md path on your own domain.
- 03
Validate
Check the published URL for the exact path, HTTP 200, allowed content type, UTF-8, safe redirects, and valid content.
Optional next step: add one product knowledge document for a product page when every fact can cite a visible Source.
The complete minimum
This frozen root template contains only the merchant identity, official website, and one public catalog entry.
Read Specification# Example Outdoor Gear> Lightweight outdoor equipment for hikers. SKU.md: [1.0.0-beta](https://sku.md/spec/1.0.0-beta/)Website: [example-outdoor.com](https://www.example-outdoor.com/) ## Catalog- [All products](https://www.example-outdoor.com/collections/all)One commerce stack, three different jobs
Use each layer for the information it can truthfully own.
L2
Feed / Catalog · live products
Current offers, price, availability, fulfillment, and market-specific product state.
L3
UCP / ACP · transactions
Capabilities for cart, checkout, payment, authorization, and order state.
Choose the next task
Start with the smallest route that matches what you need now.
Platforms
Follow a public-page publishing guide for Shopify, WooCommerce, SHOPLINE, or BigCommerce.
Product knowledge
Add source-backed facts for one canonical product page without copying live offer state.
Tools
Use the validator, Agent Skill, MCP service, or Reference Consumer.
Ready to publish the root file?
Generate the minimum, review every line, publish it at /sku.md, and validate the live response.