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 dpearson2699/swift-ios-skills --skill core-nfcgit clone --depth 1 https://github.com/dpearson2699/swift-ios-skillsWrote 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/dpearson2699/swift-ios-skills/core-nfc)<a href="https://agentmods.dev/skills/dpearson2699/swift-ios-skills/core-nfc"><img src="https://agentmods.dev/badge/skills/dpearson2699/swift-ios-skills/core-nfc/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/dpearson2699/swift-ios-skills/core-nfc"><img src="https://agentmods.dev/badge/skills/dpearson2699/swift-ios-skills/core-nfc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk 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 | $0.00062 | $0.03051 |
| Opus 5.5 | $0.00025 | $0.01220 |
| Sonnet 5.5 | $0.00012 | $0.00610 |
| Haiku 4.5 | $0.00006 | $0.00305 |
Grade A, and why
core-nfc 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.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
What ships with it
2 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 · 377 lines · 62 tokens per session scan A 4288cdd5733f
core-nfc is a skill published in the GitHub repository dpearson2699/swift-ios-skills (1,233 stars, last pushed 2mo ago), with no licence file. It adds 62 tokens to every session and 3,051 once invoked, about $0.0002 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.
Other skills, from other repositories
mobile-responsive-qa
Verify phone/tablet input and navigation flows.
health-data
A development guide for collecting and synchronising health data from Android Health Connect and Apple HealthKit. These are operating-system services that store data such as heart rate, sleep, and steps for approved apps.
earllm-build
Build, maintain, and extend the EarLLM One Android project — a Kotlin/Compose app that connects Bluetooth earbuds to an LLM via voice pipeline.
swiftui-native-first
The single most important quality skill. Enforces native SwiftUI components and rejects unnecessary custom code. Use this skill as a reference throughout the entire build process. Include its core rules in every CLAUDE.md. This is what prevents Claude Code from building janky custom UI when a native component exists.
uikit-bridging
How to bridge UIKit into a SwiftUI app correctly when SwiftUI's API is genuinely insufficient. Covers UIViewRepresentable lifecycle, sizeThatFits, font-design inheritance, animation suppression, and the small set of legitimate use cases. Use this skill whenever the swiftui-native-first skill points you here for a…
dark-mode-legibility
Test every screen in BOTH light and dark mode every iteration. The most common iOS legibility bugs only show in one mode, including a specific class of vibrancy-on-pastel-tint failures that produce illegible labels on glass buttons. Use this skill alongside polish-and-refinement during the polish phase, and as a…