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 pproenca/dot-skills --skill expo-ios-hig-verifygit clone --depth 1 https://github.com/pproenca/dot-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/pproenca/dot-skills/expo-ios-hig-verify)<a href="https://agentmods.dev/skills/pproenca/dot-skills/expo-ios-hig-verify"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/expo-ios-hig-verify/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/pproenca/dot-skills/expo-ios-hig-verify"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/expo-ios-hig-verify.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 | $0.00134 | $0.01150 |
| Opus 5 | $0.00067 | $0.00575 |
| Sonnet 5 | $0.00027 | $0.00230 |
| Haiku 4.5 | $0.00013 | $0.00115 |
Grade A, and why
expo-ios-hig-verify 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 7d 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 — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Expo iOS HIG Verifier
A read-only static checker that scans an Expo (React Native) project for violations of the expo-ios-hig rules and reports them grouped by severity, with file:line locations and links to the rule that explains the fix. It is the automated counterpart to the expo-ios-hig reference skill: that skill teaches the rules; this one checks them.
When to Apply
Run this skill when:
- The user asks to check, lint, audit, or review an Expo app for HIG compliance or native feel
- Before merging or shipping Expo iOS UI changes, as a quality gate
- After scaffolding new screens, to confirm they stay native
- Investigating why an Expo app "feels like a web wrapper" or "feels like Android"
It is read-only — it never modifies the target project, so it is safe to run unsupervised.
Workflow Overview
verify-hig.sh [project-dir]
1. Resolve search roots (app/ src/ components/ by default, or config.json)
2. Run static checks — one per detectable expo-ios-hig rule (rg, or grep fallback)
3. Aggregate findings: severity, rule, message, file:line
4. Print grouped report (ERRORS then ADVISORIES) with a link to each rule
5. Exit 0 if clean, 1 if any ERROR (with --strict, advisories fail too)
Run it:
bash scripts/verify-hig.sh /path/to/expo-app # text report
bash scripts/verify-hig.sh /path/to/expo-app --strict # advisories also fail
bash scripts/verify-hig.sh /path/to/expo-app --json # machine-readable
Checks
ERRORS are high-precision (import and literal-flag matches, low false positives). ADVISORIES are heuristics that warrant a look but don't fail the run unless --strict.
| Severity | Rule | Detects |
|---|---|---|
| ERROR | native-avoid-material-ui |
react-native-paper, @react-native-material/*, @rneui/*, react-native-elements imports |
| ERROR | nav-native-stack |
@react-navigation/stack / createStackNavigator |
| ERROR | touch-gesture-handler-thread |
PanResponder |
| ERROR | touch-pressable-feedback |
TouchableWithoutFeedback |
| ERROR | acc-dynamic-type |
allowFontScaling={false} |
| ERROR | motion-ui-thread-animation |
useNativeDriver: false |
| ADVISORY | nav-native-tabs |
createBottomTabNavigator (JS tab bar) |
| ADVISORY | visual-semantic-colors |
hardcoded hex in color:/backgroundColor:/borderColor:/tintColor: |
| ADVISORY | visual-system-font |
custom fontFamily: |
| ADVISORY | system-status-bar |
hardcoded StatusBar style="dark"/"light" |
| ADVISORY | motion-virtualized-lists |
a file using both <ScrollView> and .map( |
What ships with it
5 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.
- 7d ago First seen · 79 lines · 134 tokens per session scan A 351e78c99564
expo-ios-hig-verify is a skill published in the GitHub repository pproenca/dot-skills (207 stars, last pushed 26d ago), licensed MIT. It adds 134 tokens to every session and 1,150 once invoked, about $0.0007 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 2026-09-03.
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