Debug-action-cache !new! Jun 2026

Use a tool to manually query the Digest. If the Action Cache returns a result, but the ActionResult references a file hash that doesn't exist in the CAS, your cache is "orphaned." Common Culprits of Cache Issues

- 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

GitHub provides a management interface to see what is currently stored: Navigate to your repository on GitHub. Click the tab. In the left sidebar, under Management , click Caches . Use a tool to manually query the Digest

Exporting cache hierarchy as a directed acyclic graph (DAG) to identify which dependency layer caused the invalidation. 4. Implementation Case Study In the left sidebar, under Management , click Caches

In modern DevOps, the "action cache" stores intermediate build artifacts and dependencies. However, debugging these caches is notoriously difficult because they are often opaque, immutable, and distributed across various runner environments. A debug-action-cache utility serves as a diagnostic bridge, allowing engineers to inspect the state of cached assets without manual intervention.

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Create a secret named ACTIONS_STEP_DEBUG with value true (Settings > Secrets and variables > Actions > New repository secret). This activates debug mode for all workflows without modifying YAML files.