eas-observe
This skill integrates EAS Observe into Expo projects, automatically tracking startup, navigation, and custom event performance, and querying metrics via EAS CLI or interpreting dashboard data to quickly diagnose bottlenecks in cold/warm launches, navigation transitions, and user-defined events for optimized user experience.
npx skills add https://github.com/expo/skills --skill eas-observeBefore / After Comparison
1 组Without this skill, developers manually analyze startup performance by writing custom logs and repeating tests, taking hours and often missing key metrics to identify slow startup causes.
With this skill, key metrics like cold/warm launch, TTI are automatically collected and visualized via CLI or dashboard, reducing diagnosis time to minutes and supporting breakdowns by version and route.
EAS Observe
EAS service - costs apply. EAS Observe is a paid Expo Application Services product with free-tier limits. Ingesting and querying production metrics counts against your plan's event/usage allowance. Review https://expo.dev/pricing before enabling it in production.
EAS Observe tracks startup, navigation, and custom-event performance from production Expo apps.
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 three reference files in ./references/ cover the three things people typically need this skill for:
- Adding EAS Observe to a project →
./references/setup.md. Install, wrap the root layout (AppMetricsRooton SDK 55,ObserveRooton SDK 56+), callmarkInteractive()(global on SDK 55, via theuseObserve()hook on SDK 56+), optional per-route navigation metrics through the Expo Router / React Navigation integrations, and user-defined events viaObserve.logEvent(SDK 56+). - Querying metrics from the terminal →
./references/queries.md. The fiveeas observe:*commands —metrics-summary,metrics,routes,events,versions— with flags, table layouts, JSON shapes, and common workflows. - Reading a dashboard or CLI output →
./references/metrics.md. Target thresholds per metric, what the TTIframeRate.*params mean, and diagnostic patterns for telling slow-but-smooth startup apart from main-thread contention or hard blocks.
Quick links to the docs
- Get started: https://docs.expo.dev/eas/observe/get-started/
- Dashboard guide: https://docs.expo.dev/eas/observe/dashboard/
- 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/
- User-defined events: https://docs.expo.dev/eas/observe/events/
- Configuration: https://docs.expo.dev/eas/observe/configuration/
Submitting Feedback
If you encounter errors, misleading or outdated information in this skill, report it so Expo can improve:
npx --yes submit-expo-feedback@latest --category skills --subject "eas-observe" "<actionable feedback>"
Only submit when you have something specific and actionable to report. Include as much relevant context as possible.
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