Oversized runner for job complexity
===================================

.. list-table::
   :stub-columns: 1
   :widths: 20 80

   * - 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:**

.. code-block:: yaml

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

**Compliant:**

.. code-block:: yaml

   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.