Github Actions

Callstack's patterns for building React Native apps in GitHub Actions and pulling down the artifacts afterward. You get composite actions for iOS simulator and Android emulator builds, plus a workflow that ties them together and spits out stable artifact IDs you can grab with gh CLI or the REST API. Honestly most useful if you're tired of "works on my machine" and want teammates to test PR builds without cloning and compiling locally. The artifact upload uses actions/upload-artifact@v4 and the docs show you exactly how to script downloads, which saves you from reinventing that wheel every time.

skills.sh installs: 12K
GitHub stars: 1.7K
last updated: Aug 21, 2026

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Install

$ npx -y skills add callstackincubator/agent-skills --skill github-actions --agent claude-code

Installs into .claude/skills of the current project.

Files

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}.