Debug-action-cache Upd Jun 2026

Always provide an ordered list of fallback prefixes in the restore-keys section. If an exact match fails, GitHub will pull the most recent cache matching the prefix, preventing a complete cold start.

Sometimes, actions are intentionally excluded from caching. Look at the progress_message in the execution log and ensure cacheable is not set to false due to tags=["no-cache"] in your BUILD files 2.2.3. 4. Debugging Remote Cache Hits debug-action-cache

Once enabled, rerun the failed workflow. The logs will now display exact network calls, cache size metrics, and precise encryption key mismatches during the Restore cache step. 2. Inspect Cache Eviction and Metadata via UI Always provide an ordered list of fallback prefixes

[debug] Using key: 'build-cache-$ github.sha ' [debug] Cache created on: windows-2022 Look at the progress_message in the execution log

The ability to see the exact key being generated, the internal version of the cache, and the step-by-step restore and save process is the difference between guessing at a problem and solving it. So, the next time your CI pipeline slows down or fails without explanation, don't just stare at the green checkmark. Remember to flip the debug switch, dive into the logs, and let debug-action-cache guide you to the solution.