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-pipelinegit 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-pipeline)<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-screenshot-pipeline"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-screenshot-pipeline/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-pipeline"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-screenshot-pipeline.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 78 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Rogue Agent · line 79 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00040 | $0.01101 |
| Opus 5 | $0.00020 | $0.00550 |
| Sonnet 5 | $0.00008 | $0.00220 |
| Haiku 4.5 | $0.00004 | $0.00110 |
Grade A, and why
appstore-screenshot-pipeline scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
App Store Screenshot Pipeline
Before invoking Apple-only binaries, confirm the execution context is macOS. From Windows or Linux, run those steps in a Mac SSH project or through an already configured remote transport; do not retry missing Apple binaries locally.
Build/run the app, capture deterministic screenshots, frame them, review them, then upload through asc.
Defaults: settings .asc/screenshot.settings.json, plan .asc/screenshots.json, raw ./screenshots/raw, framed ./screenshots/framed, frame device iphone-air, Koubou 0.18.1.
Workflow
-
Verify the current CLI surface with
asc screenshots --help, subcommand help, andaxe --version. Ifaxeis missing, install it withbrew install cameroncooke/axe/axeor run./scripts/install-deps.sh --profile screenshots. -
Create/update settings with bundle id, project/scheme, UDID, paths,
frame_enabled,upload_enabled, and upload target. -
Build/install/launch:
xcrun simctl boot "$UDID" || true xcodebuild -project "App.xcodeproj" -scheme "App" -configuration Debug \ -destination "platform=iOS Simulator,id=$UDID" -derivedDataPath ".build/DerivedData" build xcrun simctl install "$UDID" ".build/DerivedData/Build/Products/Debug-iphonesimulator/App.app" xcrun simctl launch "$UDID" "com.example.app"Use
xcodebuild -showBuildSettingsif the bundle path differs. -
Capture with plan:
asc screenshots run --plan ".asc/screenshots.json" --udid "$UDID" --output jsonDuring plan authoring use AXe primitives:
axe describe-ui,axe tap,axe type,axe screenshot. -
Frame with pinned Koubou:
pip install koubou==0.18.1 kou --version asc screenshots list-frame-devices --output json asc screenshots frame --input "./screenshots/raw/home.png" --output-dir "./screenshots/framed" --device "iphone-air" --output jsonIf frames are missing, run
kou setup-framesonce with network access. -
Review:
asc screenshots review-generate --framed-dir "./screenshots/framed" --output-dir "./screenshots/review" asc screenshots review-open --output-dir "./screenshots/review" asc screenshots review-approve --all-ready --output-dir "./screenshots/review"
What ships with it
1 file 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.
- 12d ago First seen · 92 lines · 40 tokens per session scan A 4cb73cd95204
appstore-screenshot-pipeline is a skill published in the GitHub repository Xopoko/build-swift-apps (45 stars, last pushed 15d ago), licensed MIT. It adds 40 tokens to every session and 1,101 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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