Alt Text Writer

We checked each "after" against the actual photo.

A free Agent Skill that writes alt text for your Shopify product images. It looks at each photo and describes what's actually in it: the angle, the detail, the colour, the model. Then it gives you a CSV you can import into Shopify.

Give it a store URL, a product URL, or your product export CSV (Products > Export). That's all it needs.

Tested on 6 real cases from public Shopify stores, including three product export CSVs. Final scores: 10, 10, 9, 10, 9 and 10 out of 10.

The tests ran on real public data, never made-up cases, and were scored against a written rubric. A skill in this range ships only when every test scores 8/10 or more.

How we test, what we do not do, and which assistants we ran it on.

• It describes what it can see and what your product data says. It won't invent materials or features.
• Importing alt text by CSV re-imports your images. Test on one product first. For products with variant images (the photo changes per colour), paste the alt text by hand. The skill lists those products for you.

Works with any assistant that reads SKILL.md skills (Claude, Codex, Gemini CLI, Cursor and others), plus a paste-in prompt version for ChatGPT or any chatbot. We run our release tests on Claude Sonnet and Opus. Use your assistant's strongest model: in our tests, a small, fast model added facts that were not in the source data. The helper scripts need Python 3 (standard library only). Reading a live store needs web access; otherwise attach your product export CSV.

1. Unzip the free download. It holds the free skill folders, including shopify-alt-text-writer, ready-made zips for claude.ai in a claude-ai folder, and a README. Or copy the folder from GitHub.
2. Put the shopify-alt-text-writer folder where your assistant looks for skills. The generic path is .agents/skills/ (or npx skills add from a folder). Tool-specific paths:
   • Claude Code: ~/.claude/skills/ (or .claude/skills/ inside one project)
   • OpenAI Codex, Gemini CLI, Cursor and others: .agents/skills/ or the skills folder their docs name
   • claude.ai: Customize, Skills, then the plus button, Create skill, Upload a skill, and upload the zip from the claude-ai folder without unzipping it (code execution must be on in Settings, Capabilities)
   • ChatGPT or any chatbot: open the skill's prompt.md, paste it into the chat, then paste your own text or link
   • Steps for each tool, with links to its official docs: how to install Agent Skills
3. Ask for the job in plain words. The skill loads by itself.