github-actions-dev

Develop GitHub Actions by scaffolding a project template (JavaScript/TypeScript, Docker, or composite), writing action.yml metadata, implementing your logic, running tests, and publishing to the GitHub Marketplace. The Skill provides complete project structure, CI setup, and marketplace publishing guidance.

GitHub Actions come in three types: JavaScript/TypeScript actions for Node.js workflows, Docker actions for any language or tool, and composite actions that combine multiple steps. Each type has different setup requirements, testing approaches, and use cases.

Set up testing by configuring test scaffolding within your action project, add build scripts to compile TypeScript or prepare Docker images, and verify locally before publishing. The Skill includes templates and CI configurations for standardized action development.

action.yml requires standardized metadata including action name, description, inputs, outputs, and runs configuration. The Skill covers marketplace-ready metadata requirements and publishing best practices to ensure your action meets GitHub's standards.

Yes, composite actions let you bundle multiple steps and existing actions into a single reusable action. The Skill provides templates and best practices for building composite actions that simplify complex workflows.

Structure your action with clear separation of source code, tests, build outputs, and metadata. The Skill provides project layout templates that establish best practices for JavaScript/TypeScript, Docker, and composite actions.