gh-actions

To create reusable GitHub Actions composite actions, you define inputs, outputs, and run steps within an `action.yml` file. This standardizes CI/CD components and reduces workflow duplication across multiple pipelines.

The best way to standardize environment setup is by building composite actions stored in `.github/actions/`. This encapsulates setup logic to ensure consistency and reduce errors across multiple GitHub Actions workflows.

Composite action validation works by running automated checks against your `action.yml` files. This enforces coding standards and best practices, ensuring your reusable CI/CD components function correctly before integration.

Yes, you can define inputs and outputs for composite actions directly within your `action.yml` file. This allows you to pass parameters and return data between your reusable workflow components seamlessly.

You should use composite actions when you need to reuse specific workflow steps across multiple pipelines. They encapsulate logic into reusable components, reducing duplication and improving CI/CD maintainability where standard workflows would repeat code.

Common anti-patterns when writing GitHub Actions composite actions include ignoring coding standards and failing to validate `action.yml` files. Using provided validation scripts helps enforce best practices and avoid these CI/CD pipeline errors.