Github Actions Toolkit

Create custom GitHub Actions (composite, Docker, or JavaScript). Use when building reusable actions, creating custom workflow steps, or packaging logic for distribution. Trigger words include "create action", "custom action", "build action", "composite action", "Docker action".

Optimize GitHub Actions matrix strategies for testing across multiple versions, platforms, and configurations. Use when configuring matrix builds, testing multiple versions, cross-platform testing, or optimizing CI resource usage. Trigger words include "matrix strategy", "test matrix", "multiple versions", "cross-platform".