github-actions-validator

To validate GitHub Actions workflows before committing, you can lint `.github/workflows/*.yml` files to catch YAML syntax errors, check schema compliance, and enforce best practices to prevent unexpected CI failures.

Yes, you can run GitHub Actions workflows locally to test execution by using the `act` tool, which simulates the CI environment on your local machine to ensure jobs execute as expected before pushing changes.

Workflow validation fully supports custom composite, Docker, and JavaScript actions, alongside public actions from the GitHub Marketplace, allowing you to lint and test local action configurations for syntax and schema compliance.

The best way to check GitHub Actions for security vulnerabilities is to use a linter that enforces best practices, identifies common configuration errors, and detects outdated action versions during the workflow validation process.

Your GitHub Actions workflow fails with an invalid runner label because of schema compliance issues, which can be caught and resolved by linting the YAML configuration to validate runner labels before reaching production.