Github Actions Expert

This one handles GitHub Actions configuration, optimization, and debugging. You'd reach for it when workflows are failing, builds are slow, or you're setting up complex CI/CD pipelines with matrix strategies and job dependencies. It covers the practical stuff: YAML syntax troubleshooting, caching strategies, OIDC authentication, and custom action development. The skill includes actual workflow snippets for security hardening, reusable templates, and performance optimization patterns. Most useful when you're past the basics and dealing with multi-job orchestration, secret management, or trying to reduce runner costs. It knows the difference between composite actions and JavaScript actions, which matters when you're building custom tooling.