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.
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查看安装方法安装前可以查看交给 AI 代理的指令内容。
EAS service - costs apply. EAS Workflows run on Expo Application Services, a paid product with free-tier limits. Each workflow job consumes your plan's build/compute minutes, and jobs that build or submit also need paid Apple Developer and Google Play accounts. Review https://expo.dev/pricing before triggering runs.
Help developers write and edit EAS CI/CD workflow YAML files.
Fetch these resources before generating or editing workflow files, or when answering syntax questions. First resolve this skill's directory, then use the fetch script in its scripts/ directory. It is implemented using Node.js and caches responses using ETags for efficiency:
# Fetch resources
node <skill-dir>/scripts/fetch.js <url>
JSON Schema — https://api.expo.dev/v2/workflows/schema
Syntax Documentation — https://raw.githubusercontent.com/expo/expo/refs/heads/main/docs/pages/eas/workflows/syntax.mdx
Pre-packaged Jobs — https://raw.githubusercontent.com/expo/expo/refs/heads/main/docs/pages/eas/workflows/pre-packaged-jobs.mdx
Do not rely on memorized values; these resources evolve as new features are added.
Workflows live in .eas/workflows/*.yml (or .yaml). Each file must be 16 KiB or smaller.
A workflow file has these top-level keys:
name — Display name for the workflowon — Triggers that start the workflow (at least one required)jobs — Job definitions (required)defaults — Shared defaults for all jobsconcurrency — Control parallel workflow runsConsult the schema for the full specification of each section.
Use ${{ }} syntax for dynamic values. The schema defines available contexts:
github.* — GitHub repository and event informationinputs.* — Values from workflow_dispatch inputsneeds.* — Outputs and status from dependent jobsjobs.* — Job outputs (alternative syntax)steps.* — Step outputs within custom jobsworkflow.* — Workflow metadataWhen generating or editing workflows:
needs and after exist in the workflowif conditions respect the schema's length constraintsAfter generating or editing a workflow file, validate it with EAS CLI from the Expo project root:
npx -y eas-cli@latest workflow:validate .eas/workflows/<workflow.yml> --non-interactive
Run the command separately for each changed workflow file. It requires a logged-in EAS CLI session and a linked Expo project. Unlike schema-only validation, it also checks build profile references against the project's eas.json and performs EAS server-side validation. Fix every reported error and rerun the command until it prints Workflow configuration YAML is valid. Do not replace this command with a local YAML or JSON Schema validator.
When users ask about available options (job types, triggers, runner types, etc.), fetch the schema and derive the answer from it rather than relying on potentially outdated information.
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-workflows" "<actionable feedback>"
Only submit when you have something specific and actionable to report. Include as much relevant context as possible. If an AI agent repeatedly failed or the user had to take over an Expo task, load the expo-skill-feedback skill and follow its eval-candidate flow instead of reusing the command above.
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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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Deploy Expo websites and Expo Router API routes to EAS Hosting - export the web bundle, run eas deploy for production and PR preview URLs, manage environment secrets and custom domains, and work within the Cloudflare Workers runtime. Also covers authoring API routes (+api.ts handlers, HTTP methods, request handling, CORS). Use when deploying an Expo web app or API routes, setting up EAS Hosting, or configuring hosting environments and domains. Not for native builds or store releases - use the eas-app-stores skill for those.
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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, 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`), 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.
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Run and control a user's app on a remote iOS/Android simulator hosted on EAS cloud. Read before running any `eas simulator:*` commands - it has the current syntax for this experimental API. Use whenever the user needs a simulator they can't run locally - 'run my app on a cloud simulator', 'use eas simulator to run/install/screenshot my app', 'I'm on Linux/Cursor and need an iOS device', 'no sim on this box / headless CI', 'let an agent click through my app and screenshot it', 'test my dev build on a remote sim with live reload', 'stream a sim to my browser' - even when they don't say 'EAS Simulator' or 'cloud'. On a host WITHOUT a local simulator (Linux, CI, cloud sandbox) it's the default; on macOS, do NOT auto-trigger for a plain 'run on the simulator' - use it only for a cloud/remote/shareable sim, an iOS version they lack, or an agent-driven session. NOT for local sims (expo run:ios, Xcode, Android Studio), EAS Build/Update, web preview, or physical devices.
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Configure and use EAS Update for over-the-air JavaScript and asset updates with expo-updates and EAS CLI. Use when setting up OTA updates, running eas update:configure or eas update, publishing to preview/staging/production channels, explaining branches/channels/runtime versions, testing updates, or debugging why an installed build still shows old code. Load for TestFlight, preview, or production updates that do not appear, including questions about cold launches or reopening the app. Not for update health metrics; use eas-update-insights for adoption, crashes, and rollout monitoring.
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Check the health of published EAS Update: 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.
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