storebound/skills/store-screenshots/SKILL.md

name

description

store-screenshots

Produce store screenshots and the Play feature graphic for a mobile game in every required size and many languages - capture raw frames from the running game (web build via playwright, iOS Simulator via simctl, Android emulator or device via adb, or a folder of frames from any engine), write per-language marketing copy (incl. RTL Arabic and CJK fonts), render captioned scenes with device frames, JPEG copies for Play, and upload to both stores. Use when the user needs App Store / Google Play screenshots, preview images, a feature graphic, localized screenshot captions, or screenshot sizes.

Store screenshots

CLI: storebound (or bunx storebound in a project that has it, or bun <toolchain>/cli/index.ts). Needs ffmpeg, and playwright in the project (bun add -d playwright; it uses Playwright's Chromium or an installed Google Chrome) for rendering and web capture. iOS Simulator capture needs macOS + Xcode (xcrun); Android capture needs adb (platform-tools).

Sizes (what each store wants)

size key	pixels	where
ios69	1320 x 2868	App Store 6.9" (APP_IPHONE_67), required
ios65	1284 x 2778	App Store 6.5" (APP_IPHONE_65)
ipad13	2064 x 2752	App Store 13" iPad (APP_IPAD_PRO_3GEN_129), required when the app runs on iPad; only with apple.ipad: true
play	1080 x 1920	Play phone (2-8, ratio at most 2:1)
tab7	1080 x 1920	Play 7" tablet (tablet frames)
tab10	1440 x 2560	Play 10" tablet
feature	1024 x 500	Play feature graphic (required)

Sources (re-check before a release; Apple renames display classes often):

• Apple "Screenshot specifications": https://developer.apple.com/help/app-store-connect/reference/app-information/screenshot-specifications (13" iPad: 2064 x 2752 or 2048 x 2732, landscape too, "Required if app runs on iPad"; 1-10 per size; JPEG / PNG, no alpha or transparency).
• ASC API ScreenshotDisplayType: https://developer.apple.com/documentation/appstoreconnectapi/screenshotdisplaytype (there is no "13 inch" value: the 13" iPad set is APP_IPAD_PRO_3GEN_129).
• Play graphics: https://support.google.com/googleplay/android-developer/answer/9866151 (screenshots 320-3840 px, at most 2:1, JPEG or 24-bit PNG, 8 MB; feature graphic 1024 x 500).

iPad. Set apple.ipad: true only if the app runs on iPad (iPhone-only apps skip the iPad set). Then the default sizes include ipad13 (3:4 layout), apple screenshots uploads it, validate requires it, and tablet frames default to the 13" iPad screen (1032 x 1352 CSS px @2x below a 24 px bar), so an iPad Pro 13-inch / iPad Air 13-inch simulator screenshot fits after the bar is cropped. Play tablet sizes (tab7 / tab10) reuse the same tablet frames.

Steps

1. Game switches. Give the game URL params for screenshots: language, fixed seed, no ads / analytics / purchase UI, skip tutorial, jump to a level, freeze at a moment. Frames must show real gameplay (store rule).
2. Capture. Configure shots.capture with a source (or pass --source), then storebound shots capture --lang en --dry to see the plan, and without --dry to capture. Frames land in <shots.frames>/<lang>/<phone|tablet>/<shot>.png, local, not committed.
   • web (default): baseUrl, query with {lang}, shots: path / waitFor / eval / delayMs / device. Phone 440 x 902 @3x and tablet 800 x 1240 @2x by default; the template draws the status bar above.
   • ios-sim (Unity, Godot, Flutter, native, Capacitor: any Simulator build): ios.device (simulator name or UDID, e.g. a 6.9" iPhone), ios.bundleId, optional ios.app (.app to install), ios.args. Per shot: args (launch arguments, read them with UserDefaults / your engine) and / or url (deep link). Language goes in as -AppleLanguages / -AppleLocale; status bar is forced to 9:41, full battery. After a cold boot the app is launched once and given ios.warmupMs (default 8000) before the first shot; without it the first frame of a fresh simulator is often blank. A simulator storebound boots is shut down afterwards (--keep-booted keeps it). For iPad shots set ios.devices.tablet (e.g. "iPad Pro 13-inch (M5)") and device: 'tablet' | 'both' per shot.
   • android-emu: android.package, optional serial, activity, apk. Per shot: url (VIEW intent) and / or typed extras. Demo-mode status bar; per-app language on Android 13+ (older: pass {lang} in an extra). Nothing is wiped or rebooted.
   • folder: frames made any other way; shots capture (and shots check) only verify that every frame the scenes use exists with the right aspect ratio and resolution. {lang}, {locale}, {shot} are replaced in args, extras and URLs. Simulator / emulator screenshots lose cropTop rows (the status bar) so they fit the template: by default the frame's bar share per device class (162 px on a 6.9" iPhone, 48 px on a 13" iPad with apple.ipad); set cropTop: 120 or { phone, tablet } for other devices, and shots.phone / shots.tablet to that device's screen in points. Capture warns when a frame's aspect does not match. Give the game time to load: delayMs (simulator / emulator; 2500 default is short for a cold start) or waitFor (web).
3. Copy. store/shots/copy.json: per language, per scene: eyebrow, title [white line, gold line], sub, badges big, small. Short and true (only claim what is in the game); about 15 Latin characters per title line. Natural marketing tone per language, not literal translation; use the game's own terms.
4. Fonts. storebound shots fonts downloads title/body fonts and a Noto subset for every non-Latin script found in the copy (CJK, Arabic, Hebrew, Devanagari, Thai, Cyrillic/Greek). Re-run after copy edits.
5. Scenes. shots.scenes: palette (fire, violet, blast, green, night, sky, gold, candy or custom), frames (one front phone + optional back phones with x / dy / scale / rotate), badge slots (y, side, icon, hot, stars).
6. Render. storebound shots render --lang en first, review store/renders/en/sheet.png (contact sheet), then all languages in the background: storebound shots render > .storebound/render.log 2>&1 &.
7. JPEG for Play. storebound shots jpeg (q92, about 4x smaller than PNG; App Store stays PNG).
8. Check. storebound shots check (read-only, exit 1 on errors): pixel sizes (Apple: a listed size, portrait or landscape; Play screenshots 320-3840 px at most 2:1; feature graphic exactly 1024 x 500), alpha, Play JPEG / 24-bit PNG and 8 MB, counts per set (Apple 1-10, Play 2-8), text overflow flags (warnings). --variants also checks A/B variant folders. storebound validate runs the same checks on the renders folder and lists errors as blockers next to the store state (--no-local skips them).
9. Upload. storebound play images and storebound apple screenshots (both idempotent, background + log).

Gotchas

• Output is 24-bit RGB PNG: Play rejects alpha / palette PNGs, Apple rejects alpha.
• Arabic: rtl: true on the language; numbers stay LTR inside RTL text automatically.
• Japanese breaks by phrase, Korean at spaces; long words shrink the line rather than wrap.
• Check every language's sheet for overflow before uploading; German / Russian titles run long.
• Play: 8 per type max; Apple: 10 per set max.
• Do not include prices, "free" badges for paid items, or other platforms' UI.