EAS Observe

EAS service - costs apply. EAS Observe is an Expo Application Services product. The free EAS plan allows up to 10,000 monthly active users, with a limited set of features; higher usage requires a paid subscription. For details, see https://expo.dev/pricing#plan-features.

EAS Observe tracks startup, navigation, and custom-event performance from production Expo apps, and records JavaScript errors and native crashes. It needs a development or production build — the native library is not in Expo Go.

Source of truth: https://docs.expo.dev/eas/observe/ — always consult the canonical docs when API details matter, especially get-started, configuration, integrations, and the metrics reference. EAS Observe is evolving; this skill's references are written to stay accurate but may lag the docs.

Which reference to read

The five reference files in ./references/ cover what people typically need this skill for:

• Adding EAS Observe to a project → ./references/setup.md. Install, wrap the root layout (AppMetricsRoot on SDK 55, ObserveRoot on SDK 56+), mark the app interactive (global markInteractive() on SDK 55, the useObserve() hook or <ObserveInteractiveMarker /> on SDK 56+), optional per-route navigation metrics through the Expo Router / React Navigation integrations, user-defined events via Observe.logEvent (SDK 56+), error reporting, and runtime configuration (sampling, dispatch, environments, custom endpoint).
• Querying metrics from the terminal → ./references/queries.md. The eas observe:* commands — metrics-summary, metrics, routes, events, session, versions, errors, event — with flags, metric aliases, table layouts, JSON shapes, and common workflows. Also the matching observe_* tools in the Expo MCP Server, and how their inputs differ from the CLI flags.
• Reading a dashboard or CLI output → ./references/metrics.md. Target thresholds per metric, what the automatic TTI params mean (frameRate.*, device.*, network.*), and diagnostic patterns for telling slow-but-smooth startup apart from main-thread contention, hard blocks, or throttled devices.
• Reporting problems from library integrations → ./references/library-integrations.md. The current and future integrations that report problems a library detects as events or errors, with their options, limits, and how to query the reports. Currently: expo-image (expo-image.oversized events for images decoded far larger than the screen) and react-native-reanimated (reanimated.error errors and optional reanimated.warning events).
• Shipping an Observe integration in a library → ./references/third-party.md. For package authors only (SDK 57+): optional peer dependency, config declaration merging, Observe.registerIntegration(), and event naming.

Quick links to the docs

• Get started: https://docs.expo.dev/eas/observe/get-started/
• Dashboard guide: https://docs.expo.dev/eas/observe/dashboard/
• Querying with EAS CLI: https://docs.expo.dev/eas/observe/eas-cli/
• Querying with the Expo MCP Server: https://docs.expo.dev/eas/observe/mcp/
• Metrics reference: https://docs.expo.dev/eas/observe/reference/metrics/
• Expo Router integration: https://docs.expo.dev/eas/observe/integrations/expo-router/
• React Navigation integration: https://docs.expo.dev/eas/observe/integrations/react-navigation/
• Expo Image integration: https://docs.expo.dev/eas/observe/integrations/expo-image/
• Reanimated integration: https://docs.expo.dev/eas/observe/integrations/react-native-reanimated/
• User-defined events: https://docs.expo.dev/eas/observe/events/
• Error reporting: https://docs.expo.dev/eas/observe/errors/
• Configuration: https://docs.expo.dev/eas/observe/configuration/
• Third-party integrations: https://docs.expo.dev/eas/observe/integrations/third-party/
• EAS Update download performance: https://docs.expo.dev/eas/observe/eas-update/
• Troubleshooting: https://docs.expo.dev/eas/observe/reference/troubleshooting/

Submitting Feedback

If you encounter errors, misleading or outdated information in this skill, report it so Expo can improve:

npx --yes @expo/agent-cli@latest feedback --category skills --subject "eas-observe" "<actionable feedback>"

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