A GitHub Copilot Skill to Generate App Store Screenshots

Copilot has been in your editor the whole time you built this app. It suggested code, answered questions, and helped you refactor. Now you are at the store submission step, staring at a request for a full set of screenshots across every device size. That is a lot of manual design for something Copilot could help with.

Copilot reads repository custom instructions on every request. So we wrote a set of instructions that teaches it to generate store screenshots.

What Copilot does with it

With the instructions in place, ask Copilot for screenshots and it will:

1. Read your project for your app name and brand colors.
2. Ask which screens to feature and take your raw screenshots.
3. Write a benefit-led caption for each screen instead of a bare label.
4. Arrange each one on a device mockup at the correct App Store and Play Store sizes.
5. Upload the set and return a link that opens it in an editor.

The result covers the iPhone, iPad, and Android sizes the stores require, generated together so the whole set looks consistent.

Install it as repository custom instructions

Copilot reads .github/copilot-instructions.md across VS Code, Visual Studio, and JetBrains IDEs. From your project root, run:

mkdir -p .github && curl -o .github/copilot-instructions.md https://screenshotwhale.com/skills/generate-screenshots.md

If you already have a copilot-instructions.md, do not overwrite it. Open the downloaded file and paste its contents at the bottom of your existing one, so Copilot keeps your other project rules too. Then ask:

"Generate app store screenshots for my app"

A draft you can shape

The link Copilot returns opens the project in the ScreenshotWhale editor. Change any caption, color, position, or image. Copilot gets you to a finished-looking set fast, and the editor gives you the last word on every detail.

Add localization into 10 languages for international listings, then export each size as a store-ready PNG for App Store Connect and Google Play Console.

Look first, sign up later

Each generated project has a public preview link, so you can review the screenshots without an account. A free account saves the project so you can keep editing. Free exports include a small watermark and one feature graphic a day, which is enough to try the full flow.

Portable to your other agents

The instructions are plain markdown, so the same content works in Claude Code, Codex, Cursor, and Windsurf. Write it into Copilot once and reuse it in any agent that reads project instructions.

Turn the screenshot chore into one prompt. Add the instructions, ask Copilot, and open your first set in minutes. screenshotwhale.com