expo-observe
Use for anything related to EAS Observe — adding `expo-observe` to an Expo project (AppMetricsRoot/ObserveRoot HOC, markInteractive, the useObserve hook, and the Expo Router / React Navigation integrations for per-route metrics), querying via the EAS CLI (`eas observe:metrics-summary`, `observe:metrics`, `observe:routes`, `observe:events`, `observe:versions`), or interpreting the resulting metrics (cold/warm launch, TTR, TTI, navigation cold/warm TTR, update download, and the TTI frameRate params for triaging slow startups).
What this skill does
# EAS Observe 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`](./references/setup.md). Install, wrap the root layout (`AppMetricsRoot` on SDK 55, `ObserveRoot` on SDK 56+), call `markInteractive()` (global on SDK 55, via the `useObserve()` hook on SDK 56+), and optional per-route navigation metrics through the Expo Router / React Navigation integrations. - **Querying metrics from the terminal** → [`./references/queries.md`](./references/queries.md). The five `eas 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`](./references/metrics.md). Target thresholds per metric, what the TTI `frameRate.*` 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/ - Configuration: https://docs.expo.dev/eas/observe/configuration/
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