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 MartinPuli/createAnApp --skill apple-app-designergit clone --depth 1 https://github.com/MartinPuli/createAnAppWrote 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/martinpuli/createanapp/apple-app-designer)<a href="https://agentmods.dev/skills/martinpuli/createanapp/apple-app-designer"><img src="https://agentmods.dev/badge/skills/martinpuli/createanapp/apple-app-designer/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/martinpuli/createanapp/apple-app-designer"><img src="https://agentmods.dev/badge/skills/martinpuli/createanapp/apple-app-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00076 | $0.00719 |
| Opus 5.5 | $0.00030 | $0.00288 |
| Sonnet 5.5 | $0.00015 | $0.00144 |
| Haiku 4.5 | $0.00008 | $0.00072 |
Grade A, and why
apple-app-designer 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 1mo 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 — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Apple App Designer
Design for tasks and size classes, not a single simulator screenshot. Functional UI automation does not prove visual quality.
Establish the device contract
Read the actual build settings and record supported families, minimum OS, orientations, multitasking/window behavior, pointer/keyboard/Pencil input, and accessibility targets. Never assume iPhone support because the project says iOS; verify TARGETED_DEVICE_FAMILY and archive metadata.
If a family is supported, it must receive a deliberately usable experience. If it is not part of the product, exclude it rather than shipping an accidental layout.
Read references/apple-measurements.md when defining control/text/icon dimensions or exporting App Store screenshots and previews. Re-check the linked live specifications before final export.
Design the information architecture
- Center each screen on one primary task.
- Keep primary content dominant; move secondary inspectors to sheets, popovers, split-view detail, or navigation destinations as width changes.
- Define compact and regular-width behavior explicitly.
- Specify empty, first-run, loading, error, offline, permission-denied, destructive, and success states.
- Keep settings, privacy, support, Terms, purchase, and restore reachable.
Prevent crowded layouts
- Set meaningful minimum widths and breakpoints.
- Do not compress dense controls until labels wrap one character per line.
- Replace horizontal segmented controls when localization or Dynamic Type cannot fit.
- Avoid fixed frames based on one device.
- Test long localized strings and larger accessibility text.
- Preserve touch targets, focus order, contrast, and keyboard avoidance.
- Verify sheets and popovers in every declared orientation and window size.
Design commerce honestly
Before purchase, show the product, duration, full price, renewal behavior, entitlement, restore action, Terms, Privacy, close path, and any trial exactly as configured. Do not preselect or visually conceal material terms. Paid value must remain understandable when StoreKit pricing is unavailable.
What ships with it
3 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.
- 1mo ago First seen · 63 lines · 76 tokens per session scan A cea495c41454
apple-app-designer is a skill published in the GitHub repository MartinPuli/createAnApp (14 stars, last pushed 2mo ago), licensed MIT. It adds 76 tokens to every session and 719 once invoked, about $0.0003 per session on Opus 5.5. 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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