Debug-action-cache -

- name: Inspect cache contents run: | echo "Listing cached Python site-packages" ls -la venv/lib/python3.9/site-packages/ | head -20 echo "Checking for stale binaries" find venv -name "*.so" -exec ls -lh {} \;

The problem is that GitHub Actions caches are scoped to specific branches. A cache created on the main branch is not accessible from a feature branch, or vice-versa. Additionally, the internal "version" of the cache may change due to updates in the cache action or runner tools, making a previously saved cache incompatible. debug-action-cache

The most effective way to see exactly what the cache action is doing—such as why a key didn't match or where it’s looking for files—is to enable debug mode for your runner. - name: Inspect cache contents run: | echo