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DevOps & Automation · Advanced

Composite Action

A GitHub Action that bundles multiple workflow steps into a single reusable action defined in action.yml with runs.using: composite.

Definition

Composite actions reuse steps within a job, whereas reusable workflows reuse entire jobs. They are ideal for repeated setup sequences.

Example

A composite action installs Python, caches pip, and installs requirements in one step.

Exam tip

Composite action = reuse steps; reusable workflow = reuse jobs (workflow_call).

Related terms