GitHub Actions Deep Dive: Workflows, Runners, and Reusable Patterns
Deep technical dive into GitHub Actions Domains 1-3. Advanced workflow YAML, runner groups, composite actions vs reusable workflows, concurrency, contexts, artifacts, and caching — everything needed for the certification exam and real-world CI/CD.
The GitHub Actions Certification exam has a deceptively large surface area. The free study guide covers the landscape; this post goes inside the machinery. Here you will find the advanced workflow configuration patterns, runner architecture decisions, and action design tradeoffs that separate candidates who pass comfortably from those who get tripped up on the hard questions. Everything in this …
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