Mastering the Action Cache: A Complete Guide to Debugging Cache Misses and Optimizing CI/CD Build Systems

- name: Cache Node Modules uses: actions/cache@v3 id: cache-npm with: path: node_modules key: $ runner.os -node-$ hashFiles('**/package-lock.json') restore-keys: | $ runner.os -node-

- 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)"