expo/expo-observe

Utilisez cette compétence pour tout ce qui concerne EAS Observe : ajout d'`expo-observe` à un projet Expo, interrogation via l'interface CLI d'EAS, ou interprétation des métriques de performance.

Qu'est-ce que expo-observe ?

Cette compétence couvre l'ensemble de l'intégration et de l'utilisation d'EAS Observe, l'outil de monitoring de performance d'Expo. Elle vous guide pour ajouter la bibliothèque `expo-observe` à votre projet Expo, que ce soit via le composant d'ordre supérieur (HOC) `AppMetricsRoot`/`ObserveRoot`, la fonction `markInteractive`, le hook `useObserve`, ou les intégrations spécifiques avec Expo Router et React Navigation pour le suivi des métriques par route. La compétence vous permet également d'interroger les données collectées en utilisant les commandes de l'interface en ligne de commande (CLI) d'EAS : `eas observe:metrics-summary`, `observe:metrics`, `observe:routes`, `observe:events` et `observe:versions`. Enfin, elle vous aide à interpréter les métriques obtenues, telles que les lancements à froid/à chaud (cold/warm launch), le temps de réponse tactile (TTR), le temps jusqu'à l'interactivité (TTI), le TTR de navigation à froid/à chaud, le téléchargement de mises à jour (update download), ainsi que les paramètres de frameRate du TTI pour diagnostiquer les démarrages lents. Cette compétence est conçue pour l'outil Claude Code et toute interface supportant les spécifications de compétences agentiques Expo.

Compatible avec~Claude Code~Codex CLI~Cursor

npx skills add https://github.com/expo/skills/tree/main/skills/expo-observe

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Documentation

Que fait expo-observe ?

Utilisez cette compétence pour tout ce qui concerne EAS Observe — ajout d'expo-observe à un projet Expo (composant d'ordre supérieur AppMetricsRoot/ObserveRoot, markInteractive, le hook useObserve, et les intégrations Expo Router / React Navigation pour les métriques par route), interrogation via l'interface CLI d'EAS (eas observe:metrics-summary, observe:metrics, observe:routes, observe:events, observe:versions), ou interprétation des métriques obtenues (lancement froid/chaud, TTR, TTI, TTR de navigation froid/chaud, téléchargement de mise à jour, et les paramètres de frameRate du TTI pour le tri des démarrages lents).

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

expo/add-app-clip

Add an iOS App Clip target to an Expo app. Use when the user mentions App Clip, AASA, apple-app-site-association, appclips, smart app banner, or wants to ship a lightweight iOS Clip invoked from a URL alongside their parent app.

expo/building-native-ui

Complete guide for building beautiful apps with Expo Router. Covers fundamentals, styling, components, navigation, animations, patterns, and native tabs.

expo/eas-update-insights

Check the health of published EAS Updates: crash rates, install/launch counts, unique users, payload size, and the split between embedded and OTA users per channel. Use when the user asks how an update is performing, whether a rollout is healthy, how many users are on the embedded build vs OTA, or wants to gate CI on update health.

expo/expo-api-routes

Guidelines for creating API routes in Expo Router with EAS Hosting

expo/expo-brownfield

Integrate Expo and React Native into an existing native iOS or Android app. Use when the user mentions brownfield, embedding React Native in a native app, AAR/XCFramework, or adding Expo to an existing Kotlin/Swift project. Covers both the isolated approach and the integrated approach.

expo/expo-cicd-workflows

Helps understand and write EAS workflow YAML files for Expo projects. Use this skill when the user asks about CI/CD or workflows in an Expo or EAS context, mentions .eas/workflows/, or wants help with EAS build pipelines or deployment automation.

expo/expo-deployment

Deploying Expo apps to iOS App Store, Android Play Store, web hosting, and API routes

expo/expo-dev-client

Build and distribute Expo development clients locally or via TestFlight

expo/expo-examples

Framework (OSS). Expo's official example projects - the expo/examples repo of ~70 `with-*` integrations (Stripe, Clerk, Supabase, OpenAI, maps, Reanimated, SQLite, Skia, NativeWind, and more). Use when integrating a third-party library or service into an existing Expo app and you want the canonical, version-matched pattern to adapt, or when scaffolding a new project from one with `npx create-expo --example`.

expo/expo-module

Guide for creating and writing Expo native modules and views using the Expo Modules API (Swift, Kotlin, TypeScript). Covers module definition DSL, native views, shared objects, config plugins, lifecycle hooks, autolinking, and type system. Use when building or modifying native modules for Expo.

expo/expo-overview

Framework (OSS). Entry point and router for every Expo or EAS task. Load this skill first — before writing code and before choosing another expo-* / eas-* skill — when the request, PRD, or spec mentions Expo, EAS, Expo Go, or an expo-* package, or the project has an `expo` dependency in `package.json`. Within that gate it also covers app specs and designs to implement (tabs, stacks, maps, lists, navigation, building from a screenshot), and phrasings like 'implement a mobile app', 'make my app look native', 'add navigation', 'fetch some data', 'upgrade my SDK', 'add Expo to my existing native app', 'ship to the App Store', or 'I'm new to Expo, where do I start'. A fully specified request (SDK pinned, libraries named, layout given) still routes through here — the shared setup rules still apply. Do NOT load it when neither signal is present: a bare React Native project with no `expo` dependency is not Expo work. Detects the real goal, routes to the right expo-* / eas-* skill, and owns the shared setup rules.

expo/expo-router

Framework (OSS). Navigation and routing for Expo Router. Covers file-based routes, groups and dynamic routes, folder organization, Link with previews and context menus, native Stack, page titles, modals and form sheets, NativeTabs, headers and toolbars, and header search bars.

expo/expo-skill-eval

Evaluate Expo skills in this repo end-to-end - trigger accuracy, generated code quality, and runtime screenshots on iOS simulator and Android emulator via Expo Go (web optional). Use when the user wants to eval an Expo skill, test that a skill produces working code, benchmark a skill with device screenshots, or verify a skill's output renders correctly.

expo/expo-tailwind-setup

Set up Tailwind CSS v4 in Expo with react-native-css and NativeWind v5 for universal styling

expo/expo-ui

Framework (OSS). Build native UI with the @expo/ui package: real SwiftUI on iOS and Jetpack Compose on Android. Default to @expo/ui for sheets (BottomSheet), pickers, sliders, toggles, menus, and grouped-form sections — do NOT reach for Reanimated, @gorhom/bottom-sheet, or RN built-in Picker/Switch; use @expo/ui instead. Fall back to RN built-ins only when @expo/ui is missing the component. NOTE: @expo/ui List renders native grouped rows like an iOS Settings screen — it is NOT a virtualized list; use FlatList/FlashList for large datasets. Covers universal components (Host, Column, Row, Button, Text, List, BottomSheet, FieldGroup, Switch, Slider, Picker, Menu), drop-in replacements for RN community libraries, and platform-specific SwiftUI/Jetpack Compose trees. Not for Expo Router navigation, Reanimated, or data fetching.

expo/expo-ui-jetpack-compose

`@expo/ui/jetpack-compose` package lets you use Jetpack Compose Views and modifiers in your app.

expo/expo-ui-swiftui

`@expo/ui/swift-ui` package lets you use SwiftUI Views and modifiers in your app.

expo/expo-upgrade

Framework (OSS). Guidelines for upgrading Expo SDK versions and fixing dependency issues

expo/native-data-fetching

Use when implementing or debugging ANY network request, API call, or data fetching. Covers fetch API, React Query, SWR, error handling, caching, offline support, and Expo Router data loaders (`useLoaderData`).

expo/skills

Build and submit iOS and Android apps with EAS to TestFlight, the App Store, or Google Play. Supports Expo and other React Native projects, plus existing native apps. Use for eas.json setup, release pipelines, signing, app versions and build numbers, store submissions, and listing metadata. For Expo websites and API routes, use eas-hosting; for adding React Native screens to a native app, use expo-brownfield.

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