github-actions

callstackincubator/agent-skills

Reusable GitHub Actions patterns for React Native iOS simulator and Android emulator cloud builds with downloadable artifacts.

Source View on skills.sh

What is github-actions?

This skill provides GitHub Actions workflow patterns to build React Native apps for iOS simulators and Android emulators in the cloud, then publish and retrieve artifacts via gh CLI or GitHub API. Use it when setting up CI build pipelines that need stable, downloadable mobile build artifacts.

Build iOS simulator `.app.tar.gz` artifacts in GitHub Actions using composite actions
Build Android emulator `.apk` artifacts in GitHub Actions using composite actions
Upload build artifacts with stable IDs for reliable retrieval
Download artifacts via `gh run download` command or GitHub REST API
Wire multiple platform jobs into a single end-to-end workflow
Capture and use artifact IDs for scripted artifact management

How to install github-actions

npx skills add https://github.com/callstackincubator/agent-skills --skill github-actions

Prerequisites

GitHub repository with Actions enabled
React Native project configured for iOS and Android builds
gh CLI installed (for gh run download commands)
GitHub API token with appropriate permissions (for REST API downloads)

Claude Code

Cursor

Windsurf

Cline

How to use github-actions

1.Add the iOS composite action from gha-ios-composite-action.md to your repository
2.Add the Android composite action from gha-android-composite-action.md to your repository
3.Create or update `.github/workflows/mobile-build.yml` using the pattern from gha-workflow-and-downloads.md
4.Wire both composite actions into your workflow and configure upload-artifact@v4 steps
5.Capture the artifact-id output from upload steps for later retrieval
6.Download artifacts using either `gh run download` or the GitHub REST API endpoint

Use cases

Good for

Setting up CI workflows that build React Native simulator/emulator artifacts from PRs or manual dispatch
Replacing local-only mobile builds with downloadable cloud-built CI artifacts
Creating reusable composite actions for iOS and Android builds across multiple workflows
Automating artifact retrieval in downstream scripts or deployment pipelines
Publishing stable iOS and Android build artifacts for QA or testing teams

Who it's for

React Native developers setting up CI/CD pipelines
DevOps engineers managing mobile build infrastructure
Teams needing downloadable simulator and emulator builds from GitHub Actions
Developers automating artifact retrieval with gh CLI or REST API

github-actions FAQ

How do I build both iOS and Android artifacts in a single workflow?

Use the end-to-end workflow pattern from gha-workflow-and-downloads.md, which shows how to wire both the iOS and Android composite actions into separate jobs that run in parallel.

How do I retrieve artifacts programmatically after a build?

Use `gh run download <run-id>` with the gh CLI, or call the GitHub REST API endpoint `GET /repos/{owner}/{repo}/actions/artifacts/{artifact_id}/{archive_format}` with your captured artifact ID.

What formats do the build artifacts use?

iOS builds produce `.app.tar.gz` files for simulator use, and Android builds produce `.apk` files for emulator installation.

Can I use these patterns in multiple workflows?

Yes, the composite actions are designed to be reusable across different workflows in your repository.

Do I need to configure anything special for artifact uploads?

Use `actions/upload-artifact@v4` in your workflow and ensure you capture the artifact-id output for reliable retrieval later.

Full instructions (SKILL.md)

Source of truth, from callstackincubator/agent-skills.

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

Add composite actions from gha-ios-composite-action.md and gha-android-composite-action.md.
Wire them into .github/workflows/mobile-build.yml from gha-workflow-and-downloads.md.
Upload with actions/upload-artifact@v4 and capture artifact-id output.
Download with gh run download or GET /repos/{owner}/{repo}/actions/artifacts/{artifact_id}/{archive_format}.

References

File	Description
gha-ios-composite-action.md	Composite `action.yml` for iOS simulator `.app.tar.gz` builds and artifact upload
gha-android-composite-action.md	Composite `action.yml` for Android emulator `.apk` builds and artifact upload
gha-workflow-and-downloads.md	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
Need CI Android emulator `.apk` artifact	gha-android-composite-action.md
Need one workflow to trigger both platform jobs	gha-workflow-and-downloads.md
Need scripted artifact download	gha-workflow-and-downloads.md