Build artifacts not reused
==========================

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

   * - Rule ID
     - ``artifact_reuse``
   * - Category
     - energy
   * - Severity
     - medium

Dependent jobs rebuild artifacts already produced by upstream jobs instead of downloading them via actions/download-artifact.

Detection
---------

``heuristic`` — Structural comparison across multiple jobs or steps.

Examples
--------

**Non-compliant:**

.. code-block:: yaml

   jobs:
     build:
       steps:
         - uses: actions/upload-artifact@v4
           with: {name: dist, path: dist/}
     deploy:
       needs: build
       steps:
         - run: ./deploy.sh

**Compliant:**

.. code-block:: yaml

   jobs:
     build:
       steps:
         - uses: actions/upload-artifact@v4
           with: {name: dist, path: dist/}
     deploy:
       needs: build
       steps:
         - uses: actions/download-artifact@v4
           with: {name: dist}
         - run: ./deploy.sh

**Fix**: Add an actions/download-artifact step in the dependent job to consume the artifact produced by the upstream job.