Shotkit

Shotkit

End-to-end App Store screenshot pipeline for indie iOS developers. From raw Simulator capture to upload-ready assets organized by device, locale, and template style.

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What This Skill Does

Stage 1 — Capture (optional): Takes raw UI screenshots from the Xcode Simulator using xcrun simctl.

Stage 2 — Generate Copy: Produces locale-aware headlines + sublines for each screenshot frame.

Stage 3 — Composite: Renders styled screenshot images using Pillow — background, device mockup area, app UI screenshot, and text overlay.

Stage 4 — Organize: Outputs a folder structure compatible with asc CLI and App Store Connect upload.

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Workflow

Step 1 — Collect Inputs

Ask the developer for the following (or infer from context if already provided):

Required:

• App name
• Core features to highlight (3–8 bullet points)
• Target audience (one sentence)
• Primary language (default: English)
• Additional locales (optional, e.g. Italian, German, Japanese)

Screenshot source (choose one):

• A) Auto-capture from booted Simulator → ask for app Bundle ID
• B) Existing screenshots folder → ask for path to folder of PNG/JPG files
• C) No UI screenshots yet → generate placeholder-based composites with colored UI mockups

Template style (choose one, or generate previews for all):

• minimal — white/light background, small device frame, centered text, clean typography
• bold — full-bleed gradient background, large text, high contrast, punchy
• dark — dark/black background, device glow effect, premium feel
• editorial — magazine-style layout, diagonal composition, text beside device
• flat — no device frame, full-bleed app UI with text overlay bar at top or bottom

Device targets (default: iPhone 6.9" + iPad 13"):

• iPhone 6.9" — 1320 × 2868 px (mandatory as of 2025)
• iPhone 6.7" — 1290 × 2796 px (legacy, still widely used)
• iPhone 6.5" — 1242 × 2688 px
• iPad 13" — 2064 × 2752 px (mandatory if app supports iPad)
• iPad 12.9" — 2048 × 2732 px

> Read references/device_specs.md for the full device dimensions table.

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Step 2 — Install Dependencies

cat > "$REPO/skills/shotkit/scripts/install_deps.sh" /dev/null; then
  echo "❌ Python 3 not found. Install via: brew install python3"
  exit 1
fi
echo "✅ Python $(python3 --version) found"
pip3 install Pillow --quiet --break-system-packages 2>/dev/null \
  || pip3 install Pillow --quiet 2>/dev/null \
  || { echo "❌ Pillow install failed. Try: pip3 install Pillow"; exit 1; }
echo "✅ Pillow installed"
if command -v xcrun &>/dev/null; then
  echo "✅ xcrun found (Xcode present)"
else
  echo "⚠️  xcrun not found. Simulator capture will not work."
fi
echo ""
echo "✅ Dependencies ready."

## Source & license

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

- **Author:** [nicolocurioni96](https://github.com/nicolocurioni96)
- **Source:** [nicolocurioni96/withnico-skills](https://github.com/nicolocurioni96/withnico-skills)
- **License:** MIT
- **Homepage:** https://www.withnico.com/oss/withnico-skills

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