One product brief returns listings for 3 stores in one answer: an Etsy title at 121 of 140 characters, 13 tags of max 20, a first line of 143 characters that says the result and the buyer (worked example inside).

Who it’s for
Built for sellers on Etsy, Shopify, Amazon and Whop who write every listing by hand and still get titles cut off or tags rejected.

What breaks, and when
A title over the limit is cut where the store decides, and a first line without the result gives a buyer no reason to open the page.

What you get
• Title, headline, 5 bullets, description and tags per store
• A character count next to every limited field (Etsy 140 and 13x20, Amazon 200)

See it first
The full worked example output is free on getreadystack.com/skills/product-listing-writer/ — no sign-up, so you see exactly what you get before you pay.

Install in 30 seconds
Unzip into ~/.claude/skills/ (Claude Code) or upload it as a custom skill in the Claude app, then ask: “Write my Etsy listing and 13 tags for this budget spreadsheet”. Nothing to run.

What it does not do
It does not upload listings, set prices or invent specs, reviews or sales numbers.

FAQ
Q: How is this different from asking Claude without the skill?
A: The skill carries a fixed method, fill-in templates and a full worked example, so Claude follows the same structure every time instead of improvising a new one.
Q: How do I get the files?
A: In your Whop library after paying: the lesson “product-listing-writer.zip”.