Storeshots

StoreShots — App Store & Google Play Screenshot Studio

Overview

Stand up a pre-built, local-first Next.js studio so the user can design and ship App Store and Google Play listing screenshots. Think of every frame as a tiny ad: it should land one clear payoff with a strong headline, an optional eyebrow line, and a device mockup — not a raw UI screenshot.

The studio already ships with the hard parts solved:

• A live stage rendered at the surface's true resolution and scaled to fit.
• CSS-rendered device shells (no PNG bezels) for iPhone, iPad, and Android phones/tablets.
• Drag, resize, and rotate for copy and devices, plus layering and rotation controls.
• A per-surface storyboard with drag-to-reorder, duplicate, and delete.
• Per-locale copy so one project can carry several language sets.
• Local-first autosave: instant paint from localStorage plus a storeshots.project.json on disk.
• Drop-to-upload captures (POST /api/media → public/captures/uploads/.png).
• One-tap bulk export to a zip of deterministic PNGs at every required store size.

Surfaces available out of the box:

• iPhone (portrait) — App Store
• iPad (portrait) — App Store
• Android Phone (portrait) — Google Play
• Android 7" Tablet (portrait + landscape) — Google Play
• Android 10" Tablet (portrait + landscape) — Google Play
• Feature Graphic (1024×500 banner) — Google Play listing header

Core Principle

A store screenshot is a pitch, not a manual. Each frame should carry exactly one idea — a payoff, a feeling, or a pain point removed. Lean on the studio to iterate on copy and layout quickly, and don't hand-build page.tsx, the device shells, or the export pipeline — they are already in the template.

What This Skill Does

1. Copies the pre-built app from template/ (alongside this SKILL.md) into the user's working directory.
2. Installs dependencies with the user's package manager.
3. Places the user's screenshots under public/captures/... and their app icon in public/.
4. (Optionally) seeds storeshots.project.json with the user's product name, starter copy,

and capture paths so the first load already shows something real.

1. Boots the dev server and points the user to the editor in their browser.

Do NOT re-implement the editor, device shells, layout blueprints, or export pipeline by hand.

Step 0: Probe for an Existing StoreShots Project

Before asking the Step 1 questions, inspect the working directory for an existing install.

test -f package.json && sed -n '1,80p' package.json
test -f storeshots.project.json && sed -n '1,120p' storeshots.project.json
rg -n "storeshots|StudioDoc|scenesBySurface|runDeckExport|device-shell|/api/document" package.json src 2>/dev/null
find public -maxdepth 4 -path "*/captures*" -print 2>/dev/null

If a StoreShots project already exists, do not re-scaffold. Ask whether to (a) update copy / captures in the existing storeshots.project.json, or (b) leave it and just run the dev server. Edit storeshots.project.json with JSON tooling — never regex-edit it.

Step 1: Gather Context (New Project)

Ask the user, in one message:

1. What does the app do? One sentence.
2. Top 3–5 features, in priority order (these become individual frames).
3. Which surfaces? (iPhone, iPad, Android phone, 7"/10" tablet, feature graphic.)
4. Locales? Default en. Mention any RTL needs.
5. Visual direction? Maps to a palette: ink (dark), frost (cool light), clay (warm), lagoon (teal).
6. How many frames per surface? Default 3–6.
7. Asset paths? Source screenshots and an app icon, if available.

If the user gives little detail, proceed with sensible defaults and note assumptions at the end.

Step 2: Scaffold

1. Copy everything from template/ into the target directory (an empty folder, or a new

subfolder named after the app). Do not copy node_modules, .next, or any *.project.json from the template.

1. Install deps with the detected package manager:

``bash npm install # or pnpm install / yarn / bun install ``

1. Place screenshots under public/captures/{store}/{surface}/{locale}/ where store is

apple or google. Place an app icon at public/app-icon.png if provided.

Step 3: Prefill the Project (Optional but Preferred)

Write storeshots.project.json at the project root so the first load shows the user's content. Shape (only productName and scenesBySurface are essential):

{
  "productName": "Acme",
  "paletteId": "ink",
  "locales": ["en"],
  "locale": "en",
  "surface": "ios-phone",
  "orientation": "portrait",
  "productIcon": "",
  "scenesBySurface": {
    "ios-phone": [
      {
        "id": "sc_intro",
        "composition": "beacon",
        "label": { "en": "WELCOME" },
        "headline": { "en": "Stay consistent,\nevery day." },
        "capture": "/captures/apple/ios-phone/en/01.png"
      }
    ]
  }
}

Field rules:

• surface: one of ios-phone, ios-tablet, play-phone, play-tablet-7,

play-tablet-10, play-banner.

• composition: one of beacon, plinth, canopy, duet, manifesto, column,

marquee. Vary it across frames for rhythm. marquee is only for play-banner; column reads best in landscape; manifesto is copy-only.

• paletteId: ink, frost, clay, or lagoon.
• label / headline: per-locale maps. headline honors \n as line breaks.
• capture: a path under /captures/... (may include {locale}), or "" to leave empty.
• dark: optional true for a dark frame variant.
• Provide a deck for each surface the user picked. Each scene needs a unique id.

Design guidance when authoring copy:

• One outcome per frame; lead with the strongest feature on frame 2 (frame 1 is welcome/brand).
• Keep headlines readable at thumbnail size (a few words, 1–2 lines).
• Vary composition and device placement between adjacent frames.

Step 4: Run

npm run dev

Tell the user to open http://localhost:3000, then:

• Pick a surface from the top picker.
• Drop captures into the inspector, edit eyebrow + headline.
• Reorder frames in the storyboard, fine-tune position/rotation on the canvas.
• Click Export to download a zip of every required size for that surface.

Export Reference

Frames are authored at the largest size per surface and uniformly downscaled. Exports land in a zip organized by store/surface/locale/x/.

• Apple: iPhone 1320×2868, 1284×2778, 1206×2622, 1125×2436; iPad 2064×2752, 2048×2732.
• Google: Phone 1080×1920; 7" 1200×1920 / 1920×1200; 10" 1600×2560 / 2560×1600; Feature Graphic 1024×500.

Notes

• Everything runs locally; there is no backend service or account.
• Uploaded captures and *.project.json are git-ignored in the template so working files

don't leak into the user's repo. Commit storeshots.project.json only if the user wants the deck reproducible after a clone.

• If the user just wants to use the tool without an agent, they can clone the repo, cd into

skills/storeshots/template, and run it directly.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: granth16
• Source: granth16/screenshot-gen-appstore
• License: MIT

Install and usage instructions live in the source repository linked above.