Debug-action-cache -

[debug] Compressing 1,234 files (245MB) [debug] Archive segmented into 3 parts [debug] Uploading part 1/3... If you see a segmentation error (e.g., Part 2 failed to upload ), you have a network issue or a file that changed during compression (race condition). A common mistake is mis-specifying the path . The debug log will show exactly what is being archived:

Enter the niche but powerful workflow debugging tool: . This isn't just a command; it is a mindset and a technical methodology for introspecting one of the most opaque parts of GitHub’s ecosystem. debug-action-cache

[debug] restoreKeys: [ 'Linux-pip-', 'Linux-' ] [debug] GET response for key 'Linux-pip-main-2d711b': 404 [debug] GET response for key 'Linux-pip-': 200 (Stored key: 'Linux-pip-staging-9c4a7b') Your hashFiles('requirements.txt') changed (maybe a whitespace change), causing the exact key to miss. The restore key Linux-pip- matched a cache from the staging branch instead of main . Step 3: Inspect Archive Contents (The Nuclear Option) Sometimes, cache restoration succeeds, but the data is wrong. The debug-action-cache logs won't show file contents. You need to manually inspect. The debug log will show exactly what is

- name: Generate cache key simulation id: sim run: | echo "hash=$(sha256sum package-lock.json | cut -d' ' -f1)" >> $GITHUB_OUTPUT - name: Attempt Cache Restore with Full Debug uses: actions/cache@v4 with: path: node_modules key: debug-$ runner.os -$ steps.sim.outputs.hash restore-keys: debug-$ runner.os - - name: Manual inspection run: | echo "=== CACHE DEBUG REPORT ===" echo "Node modules exist? $([ -d node_modules ] && echo 'YES' || echo 'NO')" echo "Count: $(find node_modules -type f 2>/dev/null | wc -l)" The restore key Linux-pip- matched a cache from