Readable layout
---
name: eas-observe
description: Use for anything related to EAS Observe - adding `expo-observe` to an Expo project (AppMetricsRoot/ObserveRoot HOC, markInteractive and ObserveInteractiveMarker, the useObserve hook, the Expo Router / React Navigation integrations for per-route metrics, the expo-image and Reanimated integrations, user-defined events via `Observe.logEvent`, error reporting via ObserveErrorBoundary and `Observe.reportError`, native crash reporting, source map upload for symbolicated stack traces, and runtime config such as sampleRate and dispatchInDebug), querying via the EAS CLI (`eas observe:metrics-summary`, `observe:metrics`, `observe:routes`, `observe:events`, `observe:session`, `observe:versions`, `observe:errors`, `observe:event`) or the Expo MCP `observe_*` tools, interpreting the resulting metrics (cold/warm launch, TTR, TTI, navigation cold/warm TTR, update download, and the TTI frameRate/device/network params for triaging slow startups), or shipping an Observe integration inside a third-party package.
license: MIT
---
# 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`](./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 `` 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`](./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`](./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`](./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`](./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
You can voluntarily report errors, misleading or outdated information in this skill, so Expo can improve it:
```bash
npx --yes @expo/agent-cli@latest feedback --category skills --subject "eas-observe" --message ""
```
Use `--category agent-cli` for a problem with the agent CLI, and `--category evals` when an agent repeatedly fails at an Expo task. Run `feedback --help` for subjects and the data that the command sends.
Each report goes to Expo with project and environment details. Show the user the message, and send it only if the user agrees. If you cannot ask the user, do not send it. Do not include secrets or personal data.
