Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/autohandai/community-skillsnpx agentmods add skills/autohandai/community-skills/building-native-uiWrote 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/autohandai/community-skills/building-native-ui)<a href="https://agentmods.dev/skills/autohandai/community-skills/building-native-ui"><img src="https://agentmods.dev/badge/skills/autohandai/community-skills/building-native-ui/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/autohandai/community-skills/building-native-ui"><img src="https://agentmods.dev/badge/skills/autohandai/community-skills/building-native-ui.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 | $0.00031 | $0.02478 |
| Opus 5 | $0.00015 | $0.01239 |
| Sonnet 5 | $0.00006 | $0.00496 |
| Haiku 4.5 | $0.00003 | $0.00248 |
Grade A, and why
building-native-ui 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 8d 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.
This is a copy
100% identical to building-native-ui — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 322 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Expo UI Guidelines
References
Consult these resources as needed:
references/
animations.md Reanimated: entering, exiting, layout, scroll-driven, gestures
controls.md Native iOS: Switch, Slider, SegmentedControl, DateTimePicker, Picker
form-sheet.md Form sheets in expo-router: configuration, footers and background interaction.
gradients.md CSS gradients via experimental_backgroundImage (New Arch only)
icons.md SF Symbols via expo-image (sf: source), names, animations, weights
media.md Camera, audio, video, and file saving
route-structure.md Route conventions, dynamic routes, groups, folder organization
search.md Search bar with headers, useSearch hook, filtering patterns
storage.md SQLite, AsyncStorage, SecureStore
tabs.md NativeTabs, migration from JS tabs, iOS 26 features
toolbar-and-headers.md Stack headers and toolbar buttons, menus, search (iOS only)
visual-effects.md Blur (expo-blur) and liquid glass (expo-glass-effect)
webgpu-three.md 3D graphics, games, GPU visualizations with WebGPU and Three.js
zoom-transitions.md Apple Zoom: fluid zoom transitions with Link.AppleZoom (iOS 18+)
Running the App
CRITICAL: Always try Expo Go first before creating custom builds.
Most Expo apps work in Expo Go without any custom native code. Before running npx expo run:ios or npx expo run:android:
- Start with Expo Go: Run
npx expo startand scan the QR code with Expo Go - Check if features work: Test your app thoroughly in Expo Go
- Only create custom builds when required - see below
When Custom Builds Are Required
You need npx expo run:ios/android or eas build ONLY when using:
- Local Expo modules (custom native code in
modules/) - Apple targets (widgets, app clips, extensions via
@bacons/apple-targets) - Third-party native modules not included in Expo Go
- Custom native configuration that can't be expressed in
app.json
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.
- 8d ago First seen · 322 lines · 31 tokens per session scan A dc9c08d2601e
building-native-ui is a skill published in the GitHub repository autohandai/community-skills (11 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 31 tokens to every session and 2,478 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to building-native-ui, differing in 0 lines, and is treated as a copy.
Other skills, from other repositories
expo-native-ui
Framework (OSS). Build beautiful, native-feeling Expo screens. Covers Apple HIG styling, semantic colors, native controls, SF Symbols, media, visual effects, gradients, storage, and responsive layout. For routing and navigation, use the expo-router skill; for motion and animation, use the expo-animation skill.
react-native-ease-refactor
Scan for Animated/Reanimated code and migrate to EaseView.
vercel-react-native-skills
React Native and Expo best practices for building performant mobile apps. Use when building React Native components, optimizing list performance, implementing animations, or working with native modules. Triggers on tasks involving React Native, Expo, mobile performance, or native platform APIs.
create-react-native-library
Scaffolds React Native libraries with create-react-native-library for standalone libraries or local native modules and views. Use when creating or working on React Native libraries or adding native functionality in an existing app.
engineer-react-native
Build, refactor, debug, test, and ship production React Native applications across iOS and Android, including Expo and bare workflows. Use for native navigation, app lifecycle, permissions, deep links, secure storage integration, virtualized lists, keyboard and safe-area behavior, gestures, animation, JS/UI thread…
android-compose-migration
Migrate an Android XML View to Jetpack Compose following a structured 10-step workflow. Use when converting XML layouts to Compose, setting up Compose in an existing View-based project, or incrementally adopting Compose.