GitHub Actions / Reusable automation and scoped authority

GitHub Actions β€” Reusable automation and scoped authority

Review caches, tokens, untrusted input, environments, reuse, and services.

6 lessons Β· No account required

What you will learn

  • Preserve trust and compatibility across data and reuse boundaries.
  • Separate service addressing, readiness, and application setup.

  1. Cache keys, restore paths, and dependency integrity

    Accelerate acquisition while preserving correct behavior when no cache exists.

    Start learning

  2. GITHUB_TOKEN permissions and secret scope

    Give each job only the authority it needs and understand what secret redaction cannot protect.

    Start learning

  3. Untrusted input and script injection boundaries

    Keep event text as data through expression evaluation, shell execution, and application validation.

    Start learning

  4. Environment protection and approval boundaries

    Connect an environment job to actual repository protections and a specific candidate decision.

    Start learning

  5. Reusable workflows and composite actions

    Choose the reuse boundary that preserves execution, input, output, and authority contracts.

    Start learning

  6. Job containers, service containers, and network paths

    Reason about where the test client runs before selecting a service address or publishing a port.

    Start learning
Back to course