Github Actions Workflows: GitHub Actions Patterns & Best Practices

GitHub Actions Patterns & Best Practices A comprehensive guide to building production-grade CI/CD pipelines with GitHub Actions. This document covers reusable workflows, composite actions, matrix strategies, caching, secrets management, and advanced patterns that reduce duplication and improve pipeline reliability. Table of Contents Workflow Organization Reusable Workflows Composite Actions Matrix Strategies Caching & Performance Secrets & Authentication OIDC & Keyless Authentication Concurrency Controls Environment Protection Rules Error Handling & Debugging Security Hardening Monorepo Patterns Workflow Organization A well-organized .github/workflows/ directory is crucial as your pipeline grows. Group workflows by purpose and use clear naming conventions. Recommended structure: .github/ workflows/ ci.yml # Primary CI: test + lint on every push/PR deploy-staging.yml # Deploy to staging on develop branch deploy-production.yml # Deploy to production on main (with appr