/github-actions
GitHub Actions workflow patterns for React Native iOS simulator and Android emulator cloud builds with downloadable artifacts. Use when setting up CI build pipelines or downloading GitHub Actions artifacts via gh CLI and GitHub API.
$ npx -y skills add callstackincubator/agent-skills --skill github-actions --agent claude-codeHow it fires
How this skill gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.Auto-invocation is when the right skill fires by itself at the right moment, driven by a FLOW.md router and a hook, instead of you invoking it by name. It is the difference between a skill being installed and a skill actually getting used.Read the full definition →
- You can call itInvoke it directly when you want it.
- Slash command
/github-actions
Context preview
The summary Claude sees to decide when to auto-load this skill.
GitHub Actions workflow patterns for React Native iOS simulator and Android emulator cloud builds with downloadable artifacts. Use when setting up CI build pipelines or downloading GitHub Actions artifacts via gh CLI and GitHub API.
SKILL.md
github-actions.SKILL.mdname: github-actions
description: GitHub Actions workflow patterns for React Native iOS simulator and Android emulator cloud builds with downloadable artifacts. Use when setting up CI build pipelines or downloading GitHub Actions artifacts via gh CLI and GitHub API.
license: MIT
GitHub Actions Build Artifacts
Overview
Reusable GitHub Actions patterns to build React Native apps for iOS simulators and Android emulators in the cloud, then publish artifacts retrievable via `gh` CLI or GitHub API.
When to Apply
Use this skill when:
- Creating CI workflows that build React Native simulator/emulator artifacts.
- Uploading iOS simulator and Android emulator installables from PRs or manual dispatch runs.
- Replacing local-only mobile builds with downloadable CI artifacts.
- Needing stable artifact IDs/names for scripted retrieval with `gh` or REST API.
Quick Reference
1. Add composite actions from [gha-ios-composite-action.md][gha-ios-composite-action] and [gha-android-composite-action.md][gha-android-composite-action]. 2. Wire them into `.github/workflows/mobile-build.yml` from [gha-workflow-and-downloads.md][gha-workflow-and-downloads]. 3. Upload with `actions/upload-artifact@v4` and capture `artifact-id` output. 4. Download with `gh run download` or `GET /repos/{owner}/{repo}/actions/artifacts/{artifact_id}/{archive_format}`.
References
| File | Description | |------|-------------| | [gha-ios-composite-action.md][gha-ios-composite-action] | Composite `action.yml` for iOS simulator `.app.tar.gz` builds and artifact upload | | [gha-android-composite-action.md][gha-android-composite-action] | Composite `action.yml` for Android emulator `.apk` builds and artifact upload | | [gha-workflow-and-downloads.md][gha-workflow-and-downloads] | End-to-end workflow wiring plus `gh` and REST download commands |
Problem -> Skill Mapping
| Problem | Start With | |---------|------------| | Need CI iOS simulator `.app.tar.gz` artifact | [gha-ios-composite-action.md][gha-ios-composite-action] | | Need CI Android emulator `.apk` artifact | [gha-android-composite-action.md][gha-android-composite-action] | | Need one workflow to trigger both platform jobs | [gha-workflow-and-downloads.md][gha-workflow-and-downloads] | | Need scripted artifact download | [gha-workflow-and-downloads.md][gha-workflow-and-downloads] |
Source Inspiration
- [callstackincubator/ios/action.yml](https://github.com/callstackincubator/ios/blob/main/action.yml)
- [callstackincubator/android/action.yml](https://github.com/callstackincubator/android/blob/main/action.yml)
[gha-ios-composite-action]: references/gha-ios-composite-action.md [gha-android-composite-action]: references/gha-android-composite-action.md [gha-workflow-and-downloads]: references/gha-workflow-and-downloads.md
Read more
name: github-actions description: GitHub Actions workflow patterns for React Native iOS simulator and Android emulator cloud builds with downloadable artifacts. Use when setting up CI build pipelines or downloading GitHub Actions artifacts via gh CLI and GitHub API. license: MIT
GitHub Actions Build Artifacts
Overview
Reusable GitHub Actions patterns to build React Native apps for iOS simulators and Android emulators in the cloud, then publish artifacts retrievable via `gh` CLI or GitHub API.
When to Apply
Use this skill when:
- Creating CI workflows that build React Native simulator/emulator artifacts.
- Uploading iOS simulator and Android emulator installables from PRs or manual dispatch runs.
- Replacing local-only mobile builds with downloadable CI artifacts.
- Needing stable artifact IDs/names for scripted retrieval with `gh` or REST API.
Quick Reference
1. Add composite actions from [gha-ios-composite-action.md][gha-ios-composite-action] and [gha-android-composite-action.md][gha-android-composite-action]. 2. Wire them into `.github/workflows/mobile-build.yml` from [gha-workflow-and-downloads.md][gha-workflow-and-downloads]. 3. Upload with `actions/upload-artifact@v4` and capture `artifact-id` output. 4. Download with `gh run download` or `GET /repos/{owner}/{repo}/actions/artifacts/{artifact_id}/{archive_format}`.
References
| File | Description | |------|-------------| | [gha-ios-composite-action.md][gha-ios-composite-action] | Composite `action.yml` for iOS simulator `.app.tar.gz` builds and artifact upload | | [gha-android-composite-action.md][gha-android-composite-action] | Composite `action.yml` for Android emulator `.apk` builds and artifact upload | | [gha-workflow-and-downloads.md][gha-workflow-and-downloads] | End-to-end workflow wiring plus `gh` and REST download commands |
Problem -> Skill Mapping
| Problem | Start With | |---------|------------| | Need CI iOS simulator `.app.tar.gz` artifact | [gha-ios-composite-action.md][gha-ios-composite-action] | | Need CI Android emulator `.apk` artifact | [gha-android-composite-action.md][gha-android-composite-action] | | Need one workflow to trigger both platform jobs | [gha-workflow-and-downloads.md][gha-workflow-and-downloads] | | Need scripted artifact download | [gha-workflow-and-downloads.md][gha-workflow-and-downloads] |
Source Inspiration
- [callstackincubator/ios/action.yml](https://github.com/callstackincubator/ios/blob/main/action.yml)
- [callstackincubator/android/action.yml](https://github.com/callstackincubator/android/blob/main/action.yml)
[gha-ios-composite-action]: references/gha-ios-composite-action.md [gha-android-composite-action]: references/gha-android-composite-action.md [gha-workflow-and-downloads]: references/gha-workflow-and-downloads.md
Callstack Agent Skills give AI coding assistants practical React Native knowledge drawn from our work on production apps.
Repo: callstackincubator/agent-skills
Other skills on callstackincubator-agent-skills.
- /validate-skills
Validates skills in this repo against agentskills.io spec and Claude Code best practices. Use via /validate-skills command.
Open skill - /assess-react-native-migration
Assesses whether and how an existing mobile product should migrate to React Native. Use when auditing one or more product repositories for migration readiness, including products whose iOS, Android, and other clients live in separate directories or repositories; choosing
Open skill - /create-react-native-library
Scaffolds React Native libraries with create-react-native-library for standalone libraries or local native modules and views. Use when creating or working on React Native libraries or adding native functionality in an existing app.
Open skill - /react-native-best-practices
Provides React Native performance optimization guidelines for FPS, TTI, bundle size, memory leaks, re-renders, and animations. Applies to tasks involving Hermes optimization, JS thread blocking, bridge overhead, FlashList, native modules, or debugging jank and frame drops.
Open skill - /react-native-brownfield-migration
Implements an accepted incremental brownfield migration from native iOS or Android to React Native or Expo using @callstack/react-native-brownfield. Use after the brownfield path has been selected, when setting up the integration, packaging XCFramework or AAR artifacts, or
Open skill - /react-native-tv-best-practices
Reviews React Native TV apps for focus/D-pad navigation, 10-foot UI layout, TV playback/DRM integration, low-memory TV performance, and TV accessibility. Use when building, debugging, or reviewing react-native-tvos, Expo TV, Amazon Vega/Kepler, or React Native web TV targets
Open skill