Oversized runner for job complexity

Rule ID	runner_sizing
Category	energy
Severity	medium

Job uses a large runner (8+ vCPUs) but contains only lightweight steps like linting or unit tests. Downsize to a standard runner to reduce cost and carbon footprint.

Detection

pattern_matching — Regex or keyword matching on string field values.

Examples

Non-compliant:

jobs:
  test:
    runs-on: ubuntu-latest-8-cores
    steps:
      - uses: actions/checkout@v4
      - run: npm test

Compliant:

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - run: npm test

Fix: Downsize the runner to ubuntu-latest or a 2-core equivalent. Reserve large runners for compilation, model training, or other parallelizable compute tasks.