Debug-action-cache 〈Free Access〉

When these flags are active, actions/cache will output explicit network requests, archive sizes, compression speeds, and backend cache server status codes directly into your GitHub Actions console log. 2. Common Cache Failure Scenarios and Fixes

Debugging the action cache feels like detective work. By using debug-action-cache methodologies to peel back the layers of digests and fingerprints, you move from "guessing why the build is slow" to "knowing exactly why it’s re-running."

Could you share the from your YAML file?

- name : Upload directory for inspection uses : actions/upload-artifact@v4 with : name : debug-cache-content path : path/to/your/cached/folder Use code with caution. Copied to clipboard debug-action-cache

If using actions/cache@v3 , add the verbose input:

If your cache key relies on a dynamic value (such as a changing timestamp or an incorrectly scoped hash file), the pipeline generates a completely new key on every run. This results in a continuous cache miss. 2. Ephemeral Environment Variables

Click the trash can icon () on the right side of the row to purge it permanently. Method B: Using the GitHub CLI ( gh ) When these flags are active, actions/cache will output

debug-action-cache is less a single command and more of an investigative methodology. It involves a structured sequence of steps to diagnose and resolve caching issues. Typically, a seasoned engineer will approach a cache failure in the following order:

To debug a cache effectively, you must first understand how GitHub Actions and similar CI/CD platforms manage the cache lifecycle. A typical caching mechanism consists of three distinct phases:

You can scope these variables globally across an entire workflow run like this: By using debug-action-cache methodologies to peel back the

- name: Debug directory structure run: | echo "Checking if path exists..." if [ -d "node_modules" ]; then echo "Directory exists." ls -la node_modules | head -n 20 else echo "Directory DOES NOT exist." fi

"debug-action-cache is a CI build cache that stores and restores action outputs keyed by inputs to speed repeat runs and aid debugging."