Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Xopoko/build-swift-apps --skill appstore-screenshot-studiogit clone --depth 1 https://github.com/Xopoko/build-swift-appsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-screenshot-studio)<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-screenshot-studio"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-screenshot-studio/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-screenshot-studio"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-screenshot-studio.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00039 | $0.00740 |
| Opus 5 | $0.00019 | $0.00370 |
| Sonnet 5 | $0.00008 | $0.00148 |
| Haiku 4.5 | $0.00004 | $0.00074 |
Grade A, and why
appstore-screenshot-studio scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.
App Store Screenshot Studio
Before invoking Apple-only binaries, confirm the execution context is macOS. From Windows or Linux, run those steps in a Mac SSH project or through an already configured remote transport; do not retry missing Apple binaries locally.
Build App Store screenshots from product reality: inspect the app, choose install promises, write concise panel copy, assemble visuals, crop panels, and prepare App Store Connect assets.
Pair simulator capture/upload work with appstore-screenshot-pipeline, appstore-screenshot-validator, and appstore-review-readiness.
Workflow
-
Resolve context: repo, README, onboarding, paywall, root screens, existing screenshots/listings, and brand rules. If given an App Store URL, run
scripts/scrape.mjsand save JSON under.appstore-screenshots/scraped/. Ask only for missing facts that change direction: app name, devices, locales, panel count. -
Initialize:
node <skill-dir>/scripts/scaffold.mjs --output-dir .appstore-screenshotsWork from
.appstore-screenshots/config.json; keep composites in.appstore-screenshots/composites/and final panels in.appstore-screenshots/panels/. -
Plan 3-5 install-focused benefits. Put the clearest value in panel 1. Keep captions readable in search results, concrete, truthful, localizable, and useful as standalone panels.
-
Generate or assemble visuals. Use real app screenshots when accuracy matters; use image generation only for marketing composites. Keep important text/device edges crop-safe. Do not fake store badges, download buttons, nonexistent features, or misleading UI.
-
Crop:
node <skill-dir>/scripts/crop.mjs \ --input .appstore-screenshots/composites/iphone-en.png \ --device iphone \ --output-dir .appstore-screenshots/panels/iphone/en -
Validate dimensions, file count, and small thumbnails. For ASC upload, use
appstore-screenshot-pipelineorasc screenshots validate/uploadafter IDs/localizations are known.
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 58 lines · 39 tokens per session scan A 4eeebf18c1ce
appstore-screenshot-studio is a skill published in the GitHub repository Xopoko/build-swift-apps (45 stars, last pushed 14d ago), licensed MIT. It adds 39 tokens to every session and 740 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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